clap_derive-3.2.25/.cargo_vcs_info.json0000644000000001510000000000100133770ustar { "git": { "sha1": "3bd502024e45cc9abef690f28783d76a9ce33500" }, "path_in_vcs": "clap_derive" }clap_derive-3.2.25/Cargo.toml0000644000000034620000000000100114050ustar # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO # # When uploading crates to the registry Cargo will automatically # "normalize" Cargo.toml files for maximal compatibility # with all versions of Cargo and also rewrite `path` dependencies # to registry (e.g., crates.io) dependencies. # # If you are reading this file be aware that the original Cargo.toml # will likely look very different (and much more reasonable). # See Cargo.toml.orig for the original contents. [package] edition = "2021" rust-version = "1.56.1" name = "clap_derive" version = "3.2.25" include = [ "build.rs", "src/**/*", "Cargo.toml", "LICENSE*", "README.md", "benches/**/*", "examples/**/*", ] description = "Parse command line argument by defining a struct, derive crate." readme = "README.md" keywords = [ "clap", "cli", "parse", "derive", "proc_macro", ] categories = [ "command-line-interface", "development-tools::procedural-macro-helpers", ] license = "MIT OR Apache-2.0" repository = "https://github.com/clap-rs/clap/tree/master/clap_derive" [package.metadata.docs.rs] targets = ["x86_64-unknown-linux-gnu"] [package.metadata.release] dependent-version = "upgrade" shared-version = true tag-name = "v{{version}}" [[package.metadata.release.pre-release-replacements]] exactly = 2 file = "README.md" prerelease = true replace = "github.com/clap-rs/clap/blob/{{tag_name}}/" search = "github.com/clap-rs/clap/blob/[^/]+/" [lib] bench = false proc-macro = true [dependencies.heck] version = "0.4.0" [dependencies.proc-macro-error] version = "1" [dependencies.proc-macro2] version = "1.0.28" [dependencies.quote] version = "1.0.9" [dependencies.syn] version = "1.0.74" features = ["full"] [features] debug = [] default = [] deprecated = [] raw-deprecated = ["deprecated"] unstable-v4 = ["deprecated"] clap_derive-3.2.25/Cargo.toml.orig000064400000000000000000000022751046102023000150670ustar 00000000000000[package] name = "clap_derive" version = "3.2.25" description = "Parse command line argument by defining a struct, derive crate." repository = "https://github.com/clap-rs/clap/tree/master/clap_derive" categories = ["command-line-interface", "development-tools::procedural-macro-helpers"] keywords = [ "clap", "cli", "parse", "derive", "proc_macro" ] license = "MIT OR Apache-2.0" edition = "2021" rust-version = "1.56.1" # MSRV include = [ "build.rs", "src/**/*", "Cargo.toml", "LICENSE*", "README.md", "benches/**/*", "examples/**/*" ] [package.metadata.docs.rs] targets = ["x86_64-unknown-linux-gnu"] [package.metadata.release] shared-version = true dependent-version = "upgrade" tag-name = "v{{version}}" pre-release-replacements = [ {file="README.md", search="github.com/clap-rs/clap/blob/[^/]+/", replace="github.com/clap-rs/clap/blob/{{tag_name}}/", exactly=2, prerelease = true}, ] [lib] proc-macro = true bench = false [dependencies] syn = { version = "1.0.74", features = ["full"] } quote = "1.0.9" proc-macro2 = "1.0.28" heck = "0.4.0" proc-macro-error = "1" [features] default = [] debug = [] unstable-v4 = ["deprecated"] deprecated = [] raw-deprecated = ["deprecated"] clap_derive-3.2.25/LICENSE-APACHE000064400000000000000000000261351046102023000141250ustar 00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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Knapp and Clap Contributors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. clap_derive-3.2.25/README.md000064400000000000000000000015141046102023000134520ustar 00000000000000# clap_derive Macro implementation for clap's derives. [docs.rs](https://docs.rs/clap) - [Derive Tutorial](https://github.com/clap-rs/clap/blob/v3.2.25/examples/tutorial_derive/README.md) - [Derive Reference](https://github.com/clap-rs/clap/blob/v3.2.25/examples/derive_ref/README.md) ## License Licensed under either of - Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or ) - MIT license ([LICENSE-MIT](LICENSE-MIT) or ) at your option. ### Contribution Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. See [CONTRIBUTING](CONTRIBUTING.md) for more details. clap_derive-3.2.25/src/attrs.rs000064400000000000000000001430611046102023000144710ustar 00000000000000// Copyright 2018 Guillaume Pinot (@TeXitoi) , // Kevin Knapp (@kbknapp) , and // Ana Hobden (@hoverbear) // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // // This work was derived from Structopt (https://github.com/TeXitoi/structopt) // commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the // MIT/Apache 2.0 license. use crate::{ parse::*, utils::{inner_type, is_simple_ty, process_doc_comment, Sp, Ty}, }; use std::env; use heck::{ToKebabCase, ToLowerCamelCase, ToShoutySnakeCase, ToSnakeCase, ToUpperCamelCase}; use proc_macro2::{self, Span, TokenStream}; use proc_macro_error::abort; use quote::{quote, quote_spanned, ToTokens}; use syn::{ self, ext::IdentExt, spanned::Spanned, Attribute, Expr, Field, Ident, LitStr, MetaNameValue, Type, Variant, }; /// Default casing style for generated arguments. pub const DEFAULT_CASING: CasingStyle = CasingStyle::Kebab; /// Default casing style for environment variables pub const DEFAULT_ENV_CASING: CasingStyle = CasingStyle::ScreamingSnake; #[derive(Clone)] pub struct Attrs { name: Name, casing: Sp, env_casing: Sp, ty: Option, doc_comment: Vec, methods: Vec, value_parser: Option, action: Option, parser: Option>, verbatim_doc_comment: Option, next_display_order: Option, next_help_heading: Option, help_heading: Option, is_enum: bool, is_positional: bool, kind: Sp, } impl Attrs { pub fn from_struct( span: Span, attrs: &[Attribute], name: Name, argument_casing: Sp, env_casing: Sp, ) -> Self { let mut res = Self::new(span, name, None, argument_casing, env_casing); res.push_attrs(attrs); res.push_doc_comment(attrs, "about"); if let Some(value_parser) = res.value_parser.as_ref() { abort!( value_parser.span(), "`value_parser` attribute is only allowed on fields" ); } if let Some(action) = res.action.as_ref() { abort!( action.span(), "`action` attribute is only allowed on fields" ); } if let Some(parser) = res.parser.as_ref() { abort!(parser.span(), "`parse` attribute is only allowed on fields"); } match &*res.kind { Kind::Subcommand(_) => abort!(res.kind.span(), "subcommand is only allowed on fields"), Kind::Skip(_) => abort!(res.kind.span(), "skip is only allowed on fields"), Kind::Arg(_) => res, Kind::FromGlobal(_) => abort!(res.kind.span(), "from_global is only allowed on fields"), Kind::Flatten => abort!(res.kind.span(), "flatten is only allowed on fields"), Kind::ExternalSubcommand => abort!( res.kind.span(), "external_subcommand is only allowed on fields" ), } } pub fn from_variant( variant: &Variant, struct_casing: Sp, env_casing: Sp, ) -> Self { let name = variant.ident.clone(); let mut res = Self::new( variant.span(), Name::Derived(name), None, struct_casing, env_casing, ); res.push_attrs(&variant.attrs); res.push_doc_comment(&variant.attrs, "about"); match &*res.kind { Kind::Flatten => { if let Some(value_parser) = res.value_parser.as_ref() { abort!( value_parser.span(), "`value_parser` attribute is not allowed for flattened entry" ); } if let Some(action) = res.action.as_ref() { abort!( action.span(), "`action` attribute is not allowed for flattened entry" ); } if let Some(parser) = res.parser.as_ref() { abort!( parser.span(), "parse attribute is not allowed for flattened entry" ); } if res.has_explicit_methods() { abort!( res.kind.span(), "methods are not allowed for flattened entry" ); } // ignore doc comments res.doc_comment = vec![]; } Kind::ExternalSubcommand => (), Kind::Subcommand(_) => { if let Some(value_parser) = res.value_parser.as_ref() { abort!( value_parser.span(), "`value_parser` attribute is not allowed for subcommand" ); } if let Some(action) = res.action.as_ref() { abort!( action.span(), "`action` attribute is not allowed for subcommand" ); } if let Some(parser) = res.parser.as_ref() { abort!( parser.span(), "parse attribute is not allowed for subcommand" ); } use syn::Fields::*; use syn::FieldsUnnamed; let field_ty = match variant.fields { Named(_) => { abort!(variant.span(), "structs are not allowed for subcommand"); } Unit => abort!(variant.span(), "unit-type is not allowed for subcommand"), Unnamed(FieldsUnnamed { ref unnamed, .. }) if unnamed.len() == 1 => { &unnamed[0].ty } Unnamed(..) => { abort!( variant, "non single-typed tuple is not allowed for subcommand" ) } }; let ty = Ty::from_syn_ty(field_ty); match *ty { Ty::OptionOption => { abort!( field_ty, "Option> type is not allowed for subcommand" ); } Ty::OptionVec => { abort!( field_ty, "Option> type is not allowed for subcommand" ); } _ => (), } res.kind = Sp::new(Kind::Subcommand(ty), res.kind.span()); } Kind::Skip(_) => (), Kind::FromGlobal(_) => { abort!(res.kind.span(), "from_global is not supported on variants"); } Kind::Arg(_) => (), } res } pub fn from_value_enum_variant( variant: &Variant, argument_casing: Sp, env_casing: Sp, ) -> Self { let mut res = Self::new( variant.span(), Name::Derived(variant.ident.clone()), None, argument_casing, env_casing, ); res.push_attrs(&variant.attrs); res.push_doc_comment(&variant.attrs, "help"); if let Some(value_parser) = res.value_parser.as_ref() { abort!( value_parser.span(), "`value_parser` attribute is only allowed on fields" ); } if let Some(action) = res.action.as_ref() { abort!( action.span(), "`action` attribute is only allowed on fields" ); } if let Some(parser) = res.parser.as_ref() { abort!(parser.span(), "`parse` attribute is only allowed on fields"); } match &*res.kind { Kind::Subcommand(_) => abort!(res.kind.span(), "subcommand is only allowed on fields"), Kind::Skip(_) => res, Kind::Arg(_) => res, Kind::FromGlobal(_) => abort!(res.kind.span(), "from_global is only allowed on fields"), Kind::Flatten => abort!(res.kind.span(), "flatten is only allowed on fields"), Kind::ExternalSubcommand => abort!( res.kind.span(), "external_subcommand is only allowed on fields" ), } } pub fn from_field( field: &Field, struct_casing: Sp, env_casing: Sp, ) -> Self { let name = field.ident.clone().unwrap(); let mut res = Self::new( field.span(), Name::Derived(name), Some(field.ty.clone()), struct_casing, env_casing, ); res.push_attrs(&field.attrs); res.push_doc_comment(&field.attrs, "help"); match &*res.kind { Kind::Flatten => { if let Some(value_parser) = res.value_parser.as_ref() { abort!( value_parser.span(), "`value_parser` attribute is not allowed for flattened entry" ); } if let Some(action) = res.action.as_ref() { abort!( action.span(), "`action` attribute is not allowed for flattened entry" ); } if let Some(parser) = res.parser.as_ref() { abort!( parser.span(), "parse attribute is not allowed for flattened entry" ); } if res.has_explicit_methods() { abort!( res.kind.span(), "methods are not allowed for flattened entry" ); } // ignore doc comments res.doc_comment = vec![]; } Kind::ExternalSubcommand => { abort! { res.kind.span(), "`external_subcommand` can be used only on enum variants" } } Kind::Subcommand(_) => { if let Some(value_parser) = res.value_parser.as_ref() { abort!( value_parser.span(), "`value_parser` attribute is not allowed for subcommand" ); } if let Some(action) = res.action.as_ref() { abort!( action.span(), "`action` attribute is not allowed for subcommand" ); } if let Some(parser) = res.parser.as_ref() { abort!( parser.span(), "parse attribute is not allowed for subcommand" ); } if res.has_explicit_methods() { abort!( res.kind.span(), "methods in attributes are not allowed for subcommand" ); } let ty = Ty::from_syn_ty(&field.ty); match *ty { Ty::OptionOption => { abort!( field.ty, "Option> type is not allowed for subcommand" ); } Ty::OptionVec => { abort!( field.ty, "Option> type is not allowed for subcommand" ); } _ => (), } res.kind = Sp::new(Kind::Subcommand(ty), res.kind.span()); } Kind::Skip(_) => { if res.has_explicit_methods() { abort!( res.kind.span(), "methods are not allowed for skipped fields" ); } } Kind::FromGlobal(orig_ty) => { let ty = Ty::from_syn_ty(&field.ty); res.kind = Sp::new(Kind::FromGlobal(ty), orig_ty.span()); } Kind::Arg(_) => { let mut ty = Ty::from_syn_ty(&field.ty); if res.parser.is_some() { if let Some(value_parser) = res.value_parser.as_ref() { abort!( value_parser.span(), "`value_parser` attribute conflicts with `parse` attribute" ); } if let Some(action) = res.action.as_ref() { abort!( action.span(), "`action` attribute conflicts with `parse` attribute" ); } match *ty { Ty::Option | Ty::Vec | Ty::OptionVec => (), _ => ty = Sp::new(Ty::Other, ty.span()), } } match *ty { Ty::Option => { if let Some(m) = res.find_default_method() { abort!(m.name, "default_value is meaningless for Option") } } Ty::OptionOption => { if res.is_positional() { abort!( field.ty, "Option> type is meaningless for positional argument" ) } } Ty::OptionVec => { if res.is_positional() { abort!( field.ty, "Option> type is meaningless for positional argument" ) } } _ => (), } res.kind = Sp::new( Kind::Arg(ty), field .ident .as_ref() .map(|i| i.span()) .unwrap_or_else(|| field.ty.span()), ); } } res } fn new( default_span: Span, name: Name, ty: Option, casing: Sp, env_casing: Sp, ) -> Self { Self { name, ty, casing, env_casing, doc_comment: vec![], methods: vec![], value_parser: None, action: None, parser: None, verbatim_doc_comment: None, next_display_order: None, next_help_heading: None, help_heading: None, is_enum: false, is_positional: true, kind: Sp::new(Kind::Arg(Sp::new(Ty::Other, default_span)), default_span), } } fn push_method(&mut self, name: Ident, arg: impl ToTokens) { if name == "name" || name == "id" { self.name = Name::Assigned(quote!(#arg)); } else if name == "value_parser" { self.value_parser = Some(ValueParser::Explicit(Method::new(name, quote!(#arg)))); } else if name == "action" { self.action = Some(Action::Explicit(Method::new(name, quote!(#arg)))); } else { if name == "short" || name == "long" { self.is_positional = false; } self.methods.push(Method::new(name, quote!(#arg))); } } fn push_attrs(&mut self, attrs: &[Attribute]) { use ClapAttr::*; let parsed = parse_clap_attributes(attrs); for attr in &parsed { let attr = attr.clone(); match attr { Short(ident) => { self.push_method(ident, self.name.clone().translate_char(*self.casing)); } Long(ident) => { self.push_method(ident, self.name.clone().translate(*self.casing)); } ValueParser(ident) => { use crate::attrs::ValueParser; self.value_parser = Some(ValueParser::Implicit(ident)); } Action(ident) => { use crate::attrs::Action; self.action = Some(Action::Implicit(ident)); } Env(ident) => { self.push_method(ident, self.name.clone().translate(*self.env_casing)); } ValueEnum(_) => self.is_enum = true, FromGlobal(ident) => { let ty = Sp::call_site(Ty::Other); let kind = Sp::new(Kind::FromGlobal(ty), ident.span()); self.set_kind(kind); } Subcommand(ident) => { let ty = Sp::call_site(Ty::Other); let kind = Sp::new(Kind::Subcommand(ty), ident.span()); self.set_kind(kind); } ExternalSubcommand(ident) => { let kind = Sp::new(Kind::ExternalSubcommand, ident.span()); self.set_kind(kind); } Flatten(ident) => { let kind = Sp::new(Kind::Flatten, ident.span()); self.set_kind(kind); } Skip(ident, expr) => { let kind = Sp::new(Kind::Skip(expr), ident.span()); self.set_kind(kind); } VerbatimDocComment(ident) => self.verbatim_doc_comment = Some(ident), DefaultValueT(ident, expr) => { let ty = if let Some(ty) = self.ty.as_ref() { ty } else { abort!( ident, "#[clap(default_value_t)] (without an argument) can be used \ only on field level"; note = "see \ https://github.com/clap-rs/clap/blob/master/examples/derive_ref/README.md#magic-attributes") }; let val = if let Some(expr) = expr { quote!(#expr) } else { quote!(<#ty as ::std::default::Default>::default()) }; let val = if parsed.iter().any(|a| matches!(a, ValueEnum(_))) { quote_spanned!(ident.span()=> { { let val: #ty = #val; clap::ValueEnum::to_possible_value(&val).unwrap().get_name() } }) } else { quote_spanned!(ident.span()=> { static DEFAULT_VALUE: clap::__macro_refs::once_cell::sync::Lazy = clap::__macro_refs::once_cell::sync::Lazy::new(|| { let val: #ty = #val; ::std::string::ToString::to_string(&val) }); &*DEFAULT_VALUE }) }; let raw_ident = Ident::new("default_value", ident.span()); self.methods.push(Method::new(raw_ident, val)); } DefaultValuesT(ident, expr) => { let ty = if let Some(ty) = self.ty.as_ref() { ty } else { abort!( ident, "#[clap(default_values_t)] (without an argument) can be used \ only on field level"; note = "see \ https://github.com/clap-rs/clap/blob/master/examples/derive_ref/README.md#magic-attributes") }; let container_type = Ty::from_syn_ty(ty); if *container_type != Ty::Vec { abort!( ident, "#[clap(default_values_t)] can be used only on Vec types"; note = "see \ https://github.com/clap-rs/clap/blob/master/examples/derive_ref/README.md#magic-attributes") } let inner_type = inner_type(ty); // Use `Borrow<#inner_type>` so we accept `&Vec<#inner_type>` and // `Vec<#inner_type>`. let val = if parsed.iter().any(|a| matches!(a, ValueEnum(_))) { quote_spanned!(ident.span()=> { { fn iter_to_vals(iterable: impl IntoIterator) -> Vec<&'static str> where T: ::std::borrow::Borrow<#inner_type> { iterable .into_iter() .map(|val| { clap::ValueEnum::to_possible_value(val.borrow()).unwrap().get_name() }) .collect() } static DEFAULT_VALUES: clap::__macro_refs::once_cell::sync::Lazy> = clap::__macro_refs::once_cell::sync::Lazy::new(|| { iter_to_vals(#expr) }); &*DEFAULT_VALUES.as_slice() } }) } else { quote_spanned!(ident.span()=> { { fn iter_to_vals(iterable: impl IntoIterator) -> Vec where T: ::std::borrow::Borrow<#inner_type> { iterable.into_iter().map(|val| val.borrow().to_string()).collect() } static DEFAULT_STRINGS: clap::__macro_refs::once_cell::sync::Lazy> = clap::__macro_refs::once_cell::sync::Lazy::new(|| { iter_to_vals(#expr) }); static DEFAULT_VALUES: clap::__macro_refs::once_cell::sync::Lazy> = clap::__macro_refs::once_cell::sync::Lazy::new(|| { DEFAULT_STRINGS.iter().map(::std::string::String::as_str).collect() }); &*DEFAULT_VALUES.as_slice() } }) }; self.methods .push(Method::new(Ident::new("default_values", ident.span()), val)); } DefaultValueOsT(ident, expr) => { let ty = if let Some(ty) = self.ty.as_ref() { ty } else { abort!( ident, "#[clap(default_value_os_t)] (without an argument) can be used \ only on field level"; note = "see \ https://github.com/clap-rs/clap/blob/master/examples/derive_ref/README.md#magic-attributes") }; let val = if let Some(expr) = expr { quote!(#expr) } else { quote!(<#ty as ::std::default::Default>::default()) }; let val = if parsed.iter().any(|a| matches!(a, ValueEnum(_))) { quote_spanned!(ident.span()=> { { let val: #ty = #val; clap::ValueEnum::to_possible_value(&val).unwrap().get_name() } }) } else { quote_spanned!(ident.span()=> { static DEFAULT_VALUE: clap::__macro_refs::once_cell::sync::Lazy<::std::ffi::OsString> = clap::__macro_refs::once_cell::sync::Lazy::new(|| { let val: #ty = #val; ::std::ffi::OsString::from(val) }); &*DEFAULT_VALUE }) }; let raw_ident = Ident::new("default_value_os", ident.span()); self.methods.push(Method::new(raw_ident, val)); } DefaultValuesOsT(ident, expr) => { let ty = if let Some(ty) = self.ty.as_ref() { ty } else { abort!( ident, "#[clap(default_values_os_t)] (without an argument) can be used \ only on field level"; note = "see \ https://github.com/clap-rs/clap/blob/master/examples/derive_ref/README.md#magic-attributes") }; let container_type = Ty::from_syn_ty(ty); if *container_type != Ty::Vec { abort!( ident, "#[clap(default_values_os_t)] can be used only on Vec types"; note = "see \ https://github.com/clap-rs/clap/blob/master/examples/derive_ref/README.md#magic-attributes") } let inner_type = inner_type(ty); // Use `Borrow<#inner_type>` so we accept `&Vec<#inner_type>` and // `Vec<#inner_type>`. let val = if parsed.iter().any(|a| matches!(a, ValueEnum(_))) { quote_spanned!(ident.span()=> { { fn iter_to_vals(iterable: impl IntoIterator) -> Vec<&'static ::std::ffi::OsStr> where T: ::std::borrow::Borrow<#inner_type> { iterable .into_iter() .map(|val| { clap::ValueEnum::to_possible_value(val.borrow()).unwrap().get_name() }) .map(::std::ffi::OsStr::new) .collect() } static DEFAULT_VALUES: clap::__macro_refs::once_cell::sync::Lazy> = clap::__macro_refs::once_cell::sync::Lazy::new(|| { iter_to_vals(#expr) }); &*DEFAULT_VALUES.as_slice() } }) } else { quote_spanned!(ident.span()=> { { fn iter_to_vals(iterable: impl IntoIterator) -> Vec<::std::ffi::OsString> where T: ::std::borrow::Borrow<#inner_type> { iterable.into_iter().map(|val| val.borrow().into()).collect() } static DEFAULT_OS_STRINGS: clap::__macro_refs::once_cell::sync::Lazy> = clap::__macro_refs::once_cell::sync::Lazy::new(|| { iter_to_vals(#expr) }); static DEFAULT_VALUES: clap::__macro_refs::once_cell::sync::Lazy> = clap::__macro_refs::once_cell::sync::Lazy::new(|| { DEFAULT_OS_STRINGS.iter().map(::std::ffi::OsString::as_os_str).collect() }); &*DEFAULT_VALUES.as_slice() } }) }; self.methods.push(Method::new( Ident::new("default_values_os", ident.span()), val, )); } NextDisplayOrder(ident, expr) => { self.next_display_order = Some(Method::new(ident, quote!(#expr))); } HelpHeading(ident, expr) => { self.help_heading = Some(Method::new(ident, quote!(#expr))); } NextHelpHeading(ident, expr) => { self.next_help_heading = Some(Method::new(ident, quote!(#expr))); } About(ident) => { if let Some(method) = Method::from_env(ident, "CARGO_PKG_DESCRIPTION") { self.methods.push(method); } } Author(ident) => { if let Some(method) = Method::from_env(ident, "CARGO_PKG_AUTHORS") { self.methods.push(method); } } Version(ident) => { if let Some(method) = Method::from_env(ident, "CARGO_PKG_VERSION") { self.methods.push(method); } } NameLitStr(name, lit) => { self.push_method(name, lit); } NameExpr(name, expr) => { self.push_method(name, expr); } MethodCall(name, args) => self.push_method(name, quote!(#(#args),*)), RenameAll(_, casing_lit) => { self.casing = CasingStyle::from_lit(casing_lit); } RenameAllEnv(_, casing_lit) => { self.env_casing = CasingStyle::from_lit(casing_lit); } Parse(ident, spec) => { self.parser = Some(Parser::from_spec(ident, spec)); } } } } fn push_doc_comment(&mut self, attrs: &[Attribute], name: &str) { use syn::Lit::*; use syn::Meta::*; let comment_parts: Vec<_> = attrs .iter() .filter(|attr| attr.path.is_ident("doc")) .filter_map(|attr| { if let Ok(NameValue(MetaNameValue { lit: Str(s), .. })) = attr.parse_meta() { Some(s.value()) } else { // non #[doc = "..."] attributes are not our concern // we leave them for rustc to handle None } }) .collect(); self.doc_comment = process_doc_comment(comment_parts, name, self.verbatim_doc_comment.is_none()); } fn set_kind(&mut self, kind: Sp) { if let Kind::Arg(_) = *self.kind { self.kind = kind; } else { abort!( kind.span(), "`subcommand`, `flatten`, `external_subcommand` and `skip` cannot be used together" ); } } pub fn find_method(&self, name: &str) -> Option<&Method> { self.methods.iter().find(|m| m.name == name) } pub fn find_default_method(&self) -> Option<&Method> { self.methods .iter() .find(|m| m.name == "default_value" || m.name == "default_value_os") } /// generate methods from attributes on top of struct or enum pub fn initial_top_level_methods(&self) -> TokenStream { let next_display_order = self.next_display_order.as_ref().into_iter(); let next_help_heading = self.next_help_heading.as_ref().into_iter(); let help_heading = self.help_heading.as_ref().into_iter(); quote!( #(#next_display_order)* #(#next_help_heading)* #(#help_heading)* ) } pub fn final_top_level_methods(&self) -> TokenStream { let methods = &self.methods; let doc_comment = &self.doc_comment; quote!( #(#doc_comment)* #(#methods)*) } /// generate methods on top of a field pub fn field_methods(&self, supports_long_help: bool) -> proc_macro2::TokenStream { let methods = &self.methods; let help_heading = self.help_heading.as_ref().into_iter(); match supports_long_help { true => { let doc_comment = &self.doc_comment; quote!( #(#doc_comment)* #(#help_heading)* #(#methods)* ) } false => { let doc_comment = self .doc_comment .iter() .filter(|mth| mth.name != "long_help"); quote!( #(#doc_comment)* #(#help_heading)* #(#methods)* ) } } } pub fn next_display_order(&self) -> TokenStream { let next_display_order = self.next_display_order.as_ref().into_iter(); quote!( #(#next_display_order)* ) } pub fn next_help_heading(&self) -> TokenStream { let next_help_heading = self.next_help_heading.as_ref().into_iter(); let help_heading = self.help_heading.as_ref().into_iter(); quote!( #(#next_help_heading)* #(#help_heading)* ) } #[cfg(feature = "unstable-v4")] pub fn id(&self) -> TokenStream { self.name.clone().raw() } #[cfg(not(feature = "unstable-v4"))] pub fn id(&self) -> TokenStream { self.cased_name() } pub fn cased_name(&self) -> TokenStream { self.name.clone().translate(*self.casing) } pub fn value_name(&self) -> TokenStream { self.name.clone().translate(CasingStyle::ScreamingSnake) } pub fn value_parser(&self, field_type: &Type) -> Method { self.value_parser .clone() .map(|p| { let inner_type = inner_type(field_type); p.resolve(inner_type) }) .unwrap_or_else(|| { if let Some(action) = self.action.as_ref() { let inner_type = inner_type(field_type); let span = action.span(); default_value_parser(inner_type, span) } else if !self.ignore_parser() || cfg!(not(feature = "unstable-v4")) { self.parser(field_type).value_parser() } else { let inner_type = inner_type(field_type); let span = self .action .as_ref() .map(|a| a.span()) .unwrap_or_else(|| self.kind.span()); default_value_parser(inner_type, span) } }) } pub fn action(&self, field_type: &Type) -> Method { self.action .clone() .map(|p| p.resolve(field_type)) .unwrap_or_else(|| { if let Some(value_parser) = self.value_parser.as_ref() { let span = value_parser.span(); default_action(field_type, span) } else if !self.ignore_parser() || cfg!(not(feature = "unstable-v4")) { self.parser(field_type).action() } else { let span = self .value_parser .as_ref() .map(|a| a.span()) .unwrap_or_else(|| self.kind.span()); default_action(field_type, span) } }) } #[cfg(feature = "unstable-v4")] pub fn ignore_parser(&self) -> bool { self.parser.is_none() } #[cfg(not(feature = "unstable-v4"))] pub fn ignore_parser(&self) -> bool { self.value_parser.is_some() || self.action.is_some() } pub fn explicit_parser(&self) -> bool { self.parser.is_some() } pub fn parser(&self, field_type: &Type) -> Sp { self.parser .clone() .unwrap_or_else(|| Parser::from_type(field_type, self.kind.span())) } pub fn kind(&self) -> Sp { self.kind.clone() } pub fn is_enum(&self) -> bool { self.is_enum } pub fn is_positional(&self) -> bool { self.is_positional } pub fn ignore_case(&self) -> TokenStream { let method = self.find_method("ignore_case"); if let Some(method) = method { method.args.clone() } else { quote! { false } } } pub fn casing(&self) -> Sp { self.casing.clone() } pub fn env_casing(&self) -> Sp { self.env_casing.clone() } pub fn has_explicit_methods(&self) -> bool { self.methods .iter() .any(|m| m.name != "help" && m.name != "long_help") } } #[derive(Clone)] enum ValueParser { Explicit(Method), Implicit(Ident), } impl ValueParser { fn resolve(self, inner_type: &Type) -> Method { match self { Self::Explicit(method) => method, Self::Implicit(ident) => default_value_parser(inner_type, ident.span()), } } fn span(&self) -> Span { match self { Self::Explicit(method) => method.name.span(), Self::Implicit(ident) => ident.span(), } } } fn default_value_parser(inner_type: &Type, span: Span) -> Method { let func = Ident::new("value_parser", span); Method::new( func, quote_spanned! { span=> clap::value_parser!(#inner_type) }, ) } #[derive(Clone)] pub enum Action { Explicit(Method), Implicit(Ident), } impl Action { pub fn resolve(self, field_type: &Type) -> Method { match self { Self::Explicit(method) => method, Self::Implicit(ident) => default_action(field_type, ident.span()), } } pub fn span(&self) -> Span { match self { Self::Explicit(method) => method.name.span(), Self::Implicit(ident) => ident.span(), } } } fn default_action(field_type: &Type, span: Span) -> Method { let ty = Ty::from_syn_ty(field_type); let args = match *ty { Ty::Vec | Ty::OptionVec => { quote_spanned! { span=> clap::ArgAction::Append } } Ty::Option | Ty::OptionOption => { quote_spanned! { span=> clap::ArgAction::Set } } _ => { if is_simple_ty(field_type, "bool") { quote_spanned! { span=> clap::ArgAction::SetTrue } } else { quote_spanned! { span=> clap::ArgAction::Set } } } }; let func = Ident::new("action", span); Method::new(func, args) } #[allow(clippy::large_enum_variant)] #[derive(Clone)] pub enum Kind { Arg(Sp), FromGlobal(Sp), Subcommand(Sp), Flatten, Skip(Option), ExternalSubcommand, } #[derive(Clone)] pub struct Method { name: Ident, args: TokenStream, } impl Method { pub fn new(name: Ident, args: TokenStream) -> Self { Method { name, args } } fn from_env(ident: Ident, env_var: &str) -> Option { let mut lit = match env::var(env_var) { Ok(val) => { if val.is_empty() { return None; } LitStr::new(&val, ident.span()) } Err(_) => { abort!(ident, "cannot derive `{}` from Cargo.toml", ident; note = "`{}` environment variable is not set", env_var; help = "use `{} = \"...\"` to set {} manually", ident, ident; ); } }; if ident == "author" { let edited = process_author_str(&lit.value()); lit = LitStr::new(&edited, lit.span()); } Some(Method::new(ident, quote!(#lit))) } pub(crate) fn args(&self) -> &TokenStream { &self.args } } impl ToTokens for Method { fn to_tokens(&self, ts: &mut proc_macro2::TokenStream) { let Method { ref name, ref args } = self; let tokens = quote!( .#name(#args) ); tokens.to_tokens(ts); } } /// replace all `:` with `, ` when not inside the `<>` /// /// `"author1:author2:author3" => "author1, author2, author3"` /// `"author1 :author2" => "author1 , author2" fn process_author_str(author: &str) -> String { let mut res = String::with_capacity(author.len()); let mut inside_angle_braces = 0usize; for ch in author.chars() { if inside_angle_braces > 0 && ch == '>' { inside_angle_braces -= 1; res.push(ch); } else if ch == '<' { inside_angle_braces += 1; res.push(ch); } else if inside_angle_braces == 0 && ch == ':' { res.push_str(", "); } else { res.push(ch); } } res } #[derive(Clone)] pub struct Parser { pub kind: Sp, pub func: TokenStream, } impl Parser { fn from_type(field_type: &Type, span: Span) -> Sp { if is_simple_ty(field_type, "bool") { let kind = Sp::new(ParserKind::FromFlag, span); let func = quote_spanned!(span=> ::std::convert::From::from); Sp::new(Parser { kind, func }, span) } else { let kind = Sp::new(ParserKind::TryFromStr, span); let func = quote_spanned!(span=> ::std::str::FromStr::from_str); Sp::new(Parser { kind, func }, span) } } fn from_spec(parse_ident: Ident, spec: ParserSpec) -> Sp { use self::ParserKind::*; let kind = match &*spec.kind.to_string() { "from_str" => FromStr, "try_from_str" => TryFromStr, "from_os_str" => FromOsStr, "try_from_os_str" => TryFromOsStr, "from_occurrences" => FromOccurrences, "from_flag" => FromFlag, s => abort!(spec.kind.span(), "unsupported parser `{}`", s), }; let func = match spec.parse_func { None => match kind { FromStr | FromOsStr => { quote_spanned!(spec.kind.span()=> ::std::convert::From::from) } TryFromStr => quote_spanned!(spec.kind.span()=> ::std::str::FromStr::from_str), TryFromOsStr => abort!( spec.kind.span(), "you must set parser for `try_from_os_str` explicitly" ), FromOccurrences => quote_spanned!(spec.kind.span()=> { |v| v as _ }), FromFlag => quote_spanned!(spec.kind.span()=> ::std::convert::From::from), }, Some(func) => match func { Expr::Path(_) => quote!(#func), _ => abort!(func, "`parse` argument must be a function path"), }, }; let kind = Sp::new(kind, spec.kind.span()); let parser = Parser { kind, func }; Sp::new(parser, parse_ident.span()) } fn value_parser(&self) -> Method { let func = Ident::new("value_parser", self.kind.span()); match *self.kind { ParserKind::FromStr | ParserKind::TryFromStr => Method::new( func, quote_spanned! { self.kind.span()=> clap::builder::ValueParser::string()}, ), ParserKind::FromOsStr | ParserKind::TryFromOsStr => Method::new( func, quote_spanned! { self.kind.span()=> clap::builder::ValueParser::os_string()}, ), ParserKind::FromOccurrences => Method::new( func, quote_spanned! { self.kind.span()=> clap::value_parser!(u64)}, ), ParserKind::FromFlag => Method::new( func, quote_spanned! { self.kind.span()=> clap::builder::ValueParser::bool()}, ), } } fn action(&self) -> Method { let func = Ident::new("action", self.kind.span()); match *self.kind { ParserKind::FromStr | ParserKind::TryFromStr | ParserKind::FromOsStr | ParserKind::TryFromOsStr => Method::new( func, quote_spanned! { self.kind.span()=> clap::ArgAction::StoreValue}, ), ParserKind::FromOccurrences | ParserKind::FromFlag => Method::new( func, quote_spanned! { self.kind.span()=> clap::ArgAction::IncOccurrence}, ), } } } #[derive(Debug, PartialEq, Clone, Copy)] pub enum ParserKind { FromStr, TryFromStr, FromOsStr, TryFromOsStr, FromOccurrences, FromFlag, } /// Defines the casing for the attributes long representation. #[derive(Copy, Clone, Debug, PartialEq)] pub enum CasingStyle { /// Indicate word boundaries with uppercase letter, excluding the first word. Camel, /// Keep all letters lowercase and indicate word boundaries with hyphens. Kebab, /// Indicate word boundaries with uppercase letter, including the first word. Pascal, /// Keep all letters uppercase and indicate word boundaries with underscores. ScreamingSnake, /// Keep all letters lowercase and indicate word boundaries with underscores. Snake, /// Keep all letters lowercase and remove word boundaries. Lower, /// Keep all letters uppercase and remove word boundaries. Upper, /// Use the original attribute name defined in the code. Verbatim, } impl CasingStyle { fn from_lit(name: LitStr) -> Sp { use self::CasingStyle::*; let normalized = name.value().to_upper_camel_case().to_lowercase(); let cs = |kind| Sp::new(kind, name.span()); match normalized.as_ref() { "camel" | "camelcase" => cs(Camel), "kebab" | "kebabcase" => cs(Kebab), "pascal" | "pascalcase" => cs(Pascal), "screamingsnake" | "screamingsnakecase" => cs(ScreamingSnake), "snake" | "snakecase" => cs(Snake), "lower" | "lowercase" => cs(Lower), "upper" | "uppercase" => cs(Upper), "verbatim" | "verbatimcase" => cs(Verbatim), s => abort!(name, "unsupported casing: `{}`", s), } } } #[derive(Clone)] pub enum Name { Derived(Ident), Assigned(TokenStream), } impl Name { #[cfg(feature = "unstable-v4")] pub fn raw(self) -> TokenStream { match self { Name::Assigned(tokens) => tokens, Name::Derived(ident) => { let s = ident.unraw().to_string(); quote_spanned!(ident.span()=> #s) } } } pub fn translate(self, style: CasingStyle) -> TokenStream { use CasingStyle::*; match self { Name::Assigned(tokens) => tokens, Name::Derived(ident) => { let s = ident.unraw().to_string(); let s = match style { Pascal => s.to_upper_camel_case(), Kebab => s.to_kebab_case(), Camel => s.to_lower_camel_case(), ScreamingSnake => s.to_shouty_snake_case(), Snake => s.to_snake_case(), Lower => s.to_snake_case().replace('_', ""), Upper => s.to_shouty_snake_case().replace('_', ""), Verbatim => s, }; quote_spanned!(ident.span()=> #s) } } } pub fn translate_char(self, style: CasingStyle) -> TokenStream { use CasingStyle::*; match self { Name::Assigned(tokens) => quote!( (#tokens).chars().next().unwrap() ), Name::Derived(ident) => { let s = ident.unraw().to_string(); let s = match style { Pascal => s.to_upper_camel_case(), Kebab => s.to_kebab_case(), Camel => s.to_lower_camel_case(), ScreamingSnake => s.to_shouty_snake_case(), Snake => s.to_snake_case(), Lower => s.to_snake_case(), Upper => s.to_shouty_snake_case(), Verbatim => s, }; let s = s.chars().next().unwrap(); quote_spanned!(ident.span()=> #s) } } } } clap_derive-3.2.25/src/derives/args.rs000064400000000000000000000737741046102023000157460ustar 00000000000000// Copyright 2018 Guillaume Pinot (@TeXitoi) , // Kevin Knapp (@kbknapp) , and // Ana Hobden (@hoverbear) // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // // This work was derived from Structopt (https://github.com/TeXitoi/structopt) // commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the // MIT/Apache 2.0 license. use crate::{ attrs::{Attrs, Kind, Name, ParserKind, DEFAULT_CASING, DEFAULT_ENV_CASING}, dummies, utils::{inner_type, is_simple_ty, sub_type, Sp, Ty}, }; use proc_macro2::{Ident, Span, TokenStream}; use proc_macro_error::{abort, abort_call_site}; use quote::{format_ident, quote, quote_spanned}; use syn::{ punctuated::Punctuated, spanned::Spanned, token::Comma, Attribute, Data, DataStruct, DeriveInput, Field, Fields, Generics, Type, }; pub fn derive_args(input: &DeriveInput) -> TokenStream { let ident = &input.ident; dummies::args(ident); match input.data { Data::Struct(DataStruct { fields: Fields::Named(ref fields), .. }) => gen_for_struct(ident, &input.generics, &fields.named, &input.attrs), Data::Struct(DataStruct { fields: Fields::Unit, .. }) => gen_for_struct( ident, &input.generics, &Punctuated::::new(), &input.attrs, ), _ => abort_call_site!("`#[derive(Args)]` only supports non-tuple structs"), } } pub fn gen_for_struct( struct_name: &Ident, generics: &Generics, fields: &Punctuated, attrs: &[Attribute], ) -> TokenStream { let from_arg_matches = gen_from_arg_matches_for_struct(struct_name, generics, fields, attrs); let attrs = Attrs::from_struct( Span::call_site(), attrs, Name::Derived(struct_name.clone()), Sp::call_site(DEFAULT_CASING), Sp::call_site(DEFAULT_ENV_CASING), ); let app_var = Ident::new("__clap_app", Span::call_site()); let augmentation = gen_augment(fields, &app_var, &attrs, false); let augmentation_update = gen_augment(fields, &app_var, &attrs, true); let (impl_generics, ty_generics, where_clause) = generics.split_for_impl(); quote! { #from_arg_matches #[allow(dead_code, unreachable_code, unused_variables, unused_braces)] #[allow( clippy::style, clippy::complexity, clippy::pedantic, clippy::restriction, clippy::perf, clippy::deprecated, clippy::nursery, clippy::cargo, clippy::suspicious_else_formatting, clippy::almost_swapped, )] impl #impl_generics clap::Args for #struct_name #ty_generics #where_clause { fn augment_args<'b>(#app_var: clap::Command<'b>) -> clap::Command<'b> { #augmentation } fn augment_args_for_update<'b>(#app_var: clap::Command<'b>) -> clap::Command<'b> { #augmentation_update } } } } pub fn gen_from_arg_matches_for_struct( struct_name: &Ident, generics: &Generics, fields: &Punctuated, attrs: &[Attribute], ) -> TokenStream { let attrs = Attrs::from_struct( Span::call_site(), attrs, Name::Derived(struct_name.clone()), Sp::call_site(DEFAULT_CASING), Sp::call_site(DEFAULT_ENV_CASING), ); let constructor = gen_constructor(fields, &attrs); let updater = gen_updater(fields, &attrs, true); let raw_deprecated = raw_deprecated(); let (impl_generics, ty_generics, where_clause) = generics.split_for_impl(); quote! { #[allow(dead_code, unreachable_code, unused_variables, unused_braces)] #[allow( clippy::style, clippy::complexity, clippy::pedantic, clippy::restriction, clippy::perf, clippy::deprecated, clippy::nursery, clippy::cargo, clippy::suspicious_else_formatting, clippy::almost_swapped, )] impl #impl_generics clap::FromArgMatches for #struct_name #ty_generics #where_clause { fn from_arg_matches(__clap_arg_matches: &clap::ArgMatches) -> ::std::result::Result { Self::from_arg_matches_mut(&mut __clap_arg_matches.clone()) } fn from_arg_matches_mut(__clap_arg_matches: &mut clap::ArgMatches) -> ::std::result::Result { #raw_deprecated let v = #struct_name #constructor; ::std::result::Result::Ok(v) } fn update_from_arg_matches(&mut self, __clap_arg_matches: &clap::ArgMatches) -> ::std::result::Result<(), clap::Error> { self.update_from_arg_matches_mut(&mut __clap_arg_matches.clone()) } fn update_from_arg_matches_mut(&mut self, __clap_arg_matches: &mut clap::ArgMatches) -> ::std::result::Result<(), clap::Error> { #raw_deprecated #updater ::std::result::Result::Ok(()) } } } } /// Generate a block of code to add arguments/subcommands corresponding to /// the `fields` to an cmd. pub fn gen_augment( fields: &Punctuated, app_var: &Ident, parent_attribute: &Attrs, override_required: bool, ) -> TokenStream { let mut subcmds = fields.iter().filter_map(|field| { let attrs = Attrs::from_field( field, parent_attribute.casing(), parent_attribute.env_casing(), ); let kind = attrs.kind(); if let Kind::Subcommand(ty) = &*kind { let subcmd_type = match (**ty, sub_type(&field.ty)) { (Ty::Option, Some(sub_type)) => sub_type, _ => &field.ty, }; let required = if **ty == Ty::Option { quote!() } else { quote_spanned! { kind.span()=> #[allow(deprecated)] let #app_var = #app_var.setting( clap::AppSettings::SubcommandRequiredElseHelp ); } }; let span = field.span(); let ts = if override_required { quote! { let #app_var = <#subcmd_type as clap::Subcommand>::augment_subcommands_for_update( #app_var ); } } else{ quote! { let #app_var = <#subcmd_type as clap::Subcommand>::augment_subcommands( #app_var ); #required } }; Some((span, ts)) } else { None } }); let subcmd = subcmds.next().map(|(_, ts)| ts); if let Some((span, _)) = subcmds.next() { abort!( span, "multiple subcommand sets are not allowed, that's the second" ); } let args = fields.iter().filter_map(|field| { let attrs = Attrs::from_field( field, parent_attribute.casing(), parent_attribute.env_casing(), ); let kind = attrs.kind(); match &*kind { Kind::Subcommand(_) | Kind::Skip(_) | Kind::FromGlobal(_) | Kind::ExternalSubcommand => None, Kind::Flatten => { let ty = &field.ty; let old_heading_var = format_ident!("__clap_old_heading"); let next_help_heading = attrs.next_help_heading(); let next_display_order = attrs.next_display_order(); if override_required { Some(quote_spanned! { kind.span()=> let #old_heading_var = #app_var.get_next_help_heading(); let #app_var = #app_var #next_help_heading #next_display_order; let #app_var = <#ty as clap::Args>::augment_args_for_update(#app_var); let #app_var = #app_var.next_help_heading(#old_heading_var); }) } else { Some(quote_spanned! { kind.span()=> let #old_heading_var = #app_var.get_next_help_heading(); let #app_var = #app_var #next_help_heading #next_display_order; let #app_var = <#ty as clap::Args>::augment_args(#app_var); let #app_var = #app_var.next_help_heading(#old_heading_var); }) } } Kind::Arg(ty) => { let convert_type = inner_type(&field.ty); let parser = attrs.parser(&field.ty); let value_parser = attrs.value_parser(&field.ty); let action = attrs.action(&field.ty); let func = &parser.func; let mut occurrences = false; let mut flag = false; let validator = match *parser.kind { _ if attrs.ignore_parser() || attrs.is_enum() => quote!(), ParserKind::TryFromStr => quote_spanned! { func.span()=> .validator(|s| { #func(s) .map(|_: #convert_type| ()) }) }, ParserKind::TryFromOsStr => quote_spanned! { func.span()=> .validator_os(|s| #func(s).map(|_: #convert_type| ())) }, ParserKind::FromStr | ParserKind::FromOsStr => quote!(), ParserKind::FromFlag => { flag = true; quote!() } ParserKind::FromOccurrences => { occurrences = true; quote!() } }; let parse_deprecation = match *parser.kind { _ if !attrs.explicit_parser() || cfg!(not(feature = "deprecated")) => quote!(), ParserKind::FromStr => quote_spanned! { func.span()=> #[deprecated(since = "3.2.0", note = "Replaced with `#[clap(value_parser = ...)]`")] fn parse_from_str() { } parse_from_str(); }, ParserKind::TryFromStr => quote_spanned! { func.span()=> #[deprecated(since = "3.2.0", note = "Replaced with `#[clap(value_parser = ...)]`")] fn parse_try_from_str() { } parse_try_from_str(); }, ParserKind::FromOsStr => quote_spanned! { func.span()=> #[deprecated(since = "3.2.0", note = "Replaced with `#[clap(value_parser)]` for `PathBuf` or `#[clap(value_parser = ...)]` with a custom `TypedValueParser`")] fn parse_from_os_str() { } parse_from_os_str(); }, ParserKind::TryFromOsStr => quote_spanned! { func.span()=> #[deprecated(since = "3.2.0", note = "Replaced with `#[clap(value_parser = ...)]` with a custom `TypedValueParser`")] fn parse_try_from_os_str() { } parse_try_from_os_str(); }, ParserKind::FromFlag => quote_spanned! { func.span()=> #[deprecated(since = "3.2.0", note = "Replaced with `#[clap(action = ArgAction::SetTrue)]`")] fn parse_from_flag() { } parse_from_flag(); }, ParserKind::FromOccurrences => quote_spanned! { func.span()=> #[deprecated(since = "3.2.0", note = "Replaced with `#[clap(action = ArgAction::Count)]` with a field type of `u8`")] fn parse_from_occurrences() { } parse_from_occurrences(); }, }; let value_name = attrs.value_name(); let possible_values = if attrs.is_enum() && !attrs.ignore_parser() { gen_value_enum_possible_values(convert_type) } else { quote!() }; let implicit_methods = match **ty { Ty::Option => { quote_spanned! { ty.span()=> .takes_value(true) .value_name(#value_name) #possible_values #validator #value_parser #action } } Ty::OptionOption => quote_spanned! { ty.span()=> .takes_value(true) .value_name(#value_name) .min_values(0) .max_values(1) .multiple_values(false) #possible_values #validator #value_parser #action }, Ty::OptionVec => { if attrs.ignore_parser() { if attrs.is_positional() { quote_spanned! { ty.span()=> .takes_value(true) .value_name(#value_name) .multiple_values(true) // action won't be sufficient for getting multiple #possible_values #validator #value_parser #action } } else { quote_spanned! { ty.span()=> .takes_value(true) .value_name(#value_name) #possible_values #validator #value_parser #action } } } else { quote_spanned! { ty.span()=> .takes_value(true) .value_name(#value_name) .multiple_occurrences(true) #possible_values #validator #value_parser #action } } } Ty::Vec => { if attrs.ignore_parser() { if attrs.is_positional() { quote_spanned! { ty.span()=> .takes_value(true) .value_name(#value_name) .multiple_values(true) // action won't be sufficient for getting multiple #possible_values #validator #value_parser #action } } else { quote_spanned! { ty.span()=> .takes_value(true) .value_name(#value_name) #possible_values #validator #value_parser #action } } } else { quote_spanned! { ty.span()=> .takes_value(true) .value_name(#value_name) .multiple_occurrences(true) #possible_values #validator #value_parser #action } } } Ty::Other if occurrences => quote_spanned! { ty.span()=> .multiple_occurrences(true) }, Ty::Other if flag => quote_spanned! { ty.span()=> .takes_value(false) }, Ty::Other => { let required = attrs.find_default_method().is_none() && !override_required; // `ArgAction::takes_values` is assuming `ArgAction::default_value` will be // set though that won't always be true but this should be good enough, // otherwise we'll report an "arg required" error when unwrapping. let action_value = action.args(); quote_spanned! { ty.span()=> .takes_value(true) .value_name(#value_name) .required(#required && #action_value.takes_values()) #possible_values #validator #value_parser #action } } }; let id = attrs.id(); let explicit_methods = attrs.field_methods(true); Some(quote_spanned! { field.span()=> let #app_var = #app_var.arg({ #parse_deprecation #[allow(deprecated)] let arg = clap::Arg::new(#id) #implicit_methods; let arg = arg #explicit_methods; arg }); }) } } }); let initial_app_methods = parent_attribute.initial_top_level_methods(); let final_app_methods = parent_attribute.final_top_level_methods(); quote! {{ let #app_var = #app_var #initial_app_methods; #( #args )* #subcmd #app_var #final_app_methods }} } fn gen_value_enum_possible_values(ty: &Type) -> TokenStream { quote_spanned! { ty.span()=> .possible_values(<#ty as clap::ValueEnum>::value_variants().iter().filter_map(clap::ValueEnum::to_possible_value)) } } pub fn gen_constructor(fields: &Punctuated, parent_attribute: &Attrs) -> TokenStream { let fields = fields.iter().map(|field| { let attrs = Attrs::from_field( field, parent_attribute.casing(), parent_attribute.env_casing(), ); let field_name = field.ident.as_ref().unwrap(); let kind = attrs.kind(); let arg_matches = format_ident!("__clap_arg_matches"); match &*kind { Kind::ExternalSubcommand => { abort! { kind.span(), "`external_subcommand` can be used only on enum variants" } } Kind::Subcommand(ty) => { let subcmd_type = match (**ty, sub_type(&field.ty)) { (Ty::Option, Some(sub_type)) => sub_type, _ => &field.ty, }; match **ty { Ty::Option => { quote_spanned! { kind.span()=> #field_name: { if #arg_matches.subcommand_name().map(<#subcmd_type as clap::Subcommand>::has_subcommand).unwrap_or(false) { Some(<#subcmd_type as clap::FromArgMatches>::from_arg_matches_mut(#arg_matches)?) } else { None } } } }, _ => { quote_spanned! { kind.span()=> #field_name: { <#subcmd_type as clap::FromArgMatches>::from_arg_matches_mut(#arg_matches)? } } }, } } Kind::Flatten => quote_spanned! { kind.span()=> #field_name: clap::FromArgMatches::from_arg_matches_mut(#arg_matches)? }, Kind::Skip(val) => match val { None => quote_spanned!(kind.span()=> #field_name: Default::default()), Some(val) => quote_spanned!(kind.span()=> #field_name: (#val).into()), }, Kind::Arg(ty) | Kind::FromGlobal(ty) => { gen_parsers(&attrs, ty, field_name, field, None) } } }); quote! {{ #( #fields ),* }} } pub fn gen_updater( fields: &Punctuated, parent_attribute: &Attrs, use_self: bool, ) -> TokenStream { let fields = fields.iter().map(|field| { let attrs = Attrs::from_field( field, parent_attribute.casing(), parent_attribute.env_casing(), ); let field_name = field.ident.as_ref().unwrap(); let kind = attrs.kind(); let access = if use_self { quote! { #[allow(non_snake_case)] let #field_name = &mut self.#field_name; } } else { quote!() }; let arg_matches = format_ident!("__clap_arg_matches"); match &*kind { Kind::ExternalSubcommand => { abort! { kind.span(), "`external_subcommand` can be used only on enum variants" } } Kind::Subcommand(ty) => { let subcmd_type = match (**ty, sub_type(&field.ty)) { (Ty::Option, Some(sub_type)) => sub_type, _ => &field.ty, }; let updater = quote_spanned! { ty.span()=> <#subcmd_type as clap::FromArgMatches>::update_from_arg_matches_mut(#field_name, #arg_matches)?; }; let updater = match **ty { Ty::Option => quote_spanned! { kind.span()=> if let Some(#field_name) = #field_name.as_mut() { #updater } else { *#field_name = Some(<#subcmd_type as clap::FromArgMatches>::from_arg_matches_mut( #arg_matches )?); } }, _ => quote_spanned! { kind.span()=> #updater }, }; quote_spanned! { kind.span()=> { #access #updater } } } Kind::Flatten => quote_spanned! { kind.span()=> { #access clap::FromArgMatches::update_from_arg_matches_mut(#field_name, #arg_matches)?; } }, Kind::Skip(_) => quote!(), Kind::Arg(ty) | Kind::FromGlobal(ty) => gen_parsers(&attrs, ty, field_name, field, Some(&access)), } }); quote! { #( #fields )* } } fn gen_parsers( attrs: &Attrs, ty: &Sp, field_name: &Ident, field: &Field, update: Option<&TokenStream>, ) -> TokenStream { use self::ParserKind::*; let parser = attrs.parser(&field.ty); let func = &parser.func; let span = parser.kind.span(); let convert_type = inner_type(&field.ty); let id = attrs.id(); let mut flag = false; let mut occurrences = false; let (get_one, get_many, deref, mut parse) = match *parser.kind { _ if attrs.ignore_parser() => ( quote_spanned!(span=> remove_one::<#convert_type>), quote_spanned!(span=> remove_many::<#convert_type>), quote!(|s| s), quote_spanned!(func.span()=> |s| ::std::result::Result::Ok::<_, clap::Error>(s)), ), FromOccurrences => { occurrences = true; ( quote_spanned!(span=> occurrences_of), quote!(), quote!(|s| ::std::ops::Deref::deref(s)), func.clone(), ) } FromFlag => { flag = true; ( quote!(), quote!(), quote!(|s| ::std::ops::Deref::deref(s)), func.clone(), ) } FromStr => ( quote_spanned!(span=> get_one::), quote_spanned!(span=> get_many::), quote!(|s| ::std::ops::Deref::deref(s)), quote_spanned!(func.span()=> |s| ::std::result::Result::Ok::<_, clap::Error>(#func(s))), ), TryFromStr => ( quote_spanned!(span=> get_one::), quote_spanned!(span=> get_many::), quote!(|s| ::std::ops::Deref::deref(s)), quote_spanned!(func.span()=> |s| #func(s).map_err(|err| clap::Error::raw(clap::ErrorKind::ValueValidation, format!("Invalid value for {}: {}", #id, err)))), ), FromOsStr => ( quote_spanned!(span=> get_one::<::std::ffi::OsString>), quote_spanned!(span=> get_many::<::std::ffi::OsString>), quote!(|s| ::std::ops::Deref::deref(s)), quote_spanned!(func.span()=> |s| ::std::result::Result::Ok::<_, clap::Error>(#func(s))), ), TryFromOsStr => ( quote_spanned!(span=> get_one::<::std::ffi::OsString>), quote_spanned!(span=> get_many::<::std::ffi::OsString>), quote!(|s| ::std::ops::Deref::deref(s)), quote_spanned!(func.span()=> |s| #func(s).map_err(|err| clap::Error::raw(clap::ErrorKind::ValueValidation, format!("Invalid value for {}: {}", #id, err)))), ), }; if attrs.is_enum() && !attrs.ignore_parser() { let ci = attrs.ignore_case(); parse = quote_spanned! { convert_type.span()=> |s| <#convert_type as clap::ValueEnum>::from_str(s, #ci).map_err(|err| clap::Error::raw(clap::ErrorKind::ValueValidation, format!("Invalid value for {}: {}", #id, err))) } } // Give this identifier the same hygiene // as the `arg_matches` parameter definition. This // allows us to refer to `arg_matches` within a `quote_spanned` block let arg_matches = format_ident!("__clap_arg_matches"); let field_value = match **ty { Ty::Option => { quote_spanned! { ty.span()=> #arg_matches.#get_one(#id) .map(#deref) .map(#parse) .transpose()? } } Ty::OptionOption => quote_spanned! { ty.span()=> if #arg_matches.contains_id(#id) { Some( #arg_matches.#get_one(#id) .map(#deref) .map(#parse).transpose()? ) } else { None } }, Ty::OptionVec => quote_spanned! { ty.span()=> if #arg_matches.contains_id(#id) { Some(#arg_matches.#get_many(#id) .map(|v| v.map(#deref).map::<::std::result::Result<#convert_type, clap::Error>, _>(#parse).collect::<::std::result::Result, clap::Error>>()) .transpose()? .unwrap_or_else(Vec::new)) } else { None } }, Ty::Vec => { quote_spanned! { ty.span()=> #arg_matches.#get_many(#id) .map(|v| v.map(#deref).map::<::std::result::Result<#convert_type, clap::Error>, _>(#parse).collect::<::std::result::Result, clap::Error>>()) .transpose()? .unwrap_or_else(Vec::new) } } Ty::Other if occurrences => quote_spanned! { ty.span()=> #parse( #arg_matches.#get_one(#id) ) }, Ty::Other if flag => { if update.is_some() && is_simple_ty(&field.ty, "bool") { quote_spanned! { ty.span()=> *#field_name || #arg_matches.is_present(#id) } } else { quote_spanned! { ty.span()=> #parse(#arg_matches.is_present(#id)) } } } Ty::Other => { quote_spanned! { ty.span()=> #arg_matches.#get_one(#id) .map(#deref) .ok_or_else(|| clap::Error::raw(clap::ErrorKind::MissingRequiredArgument, format!("The following required argument was not provided: {}", #id))) .and_then(#parse)? } } }; if let Some(access) = update { quote_spanned! { field.span()=> if #arg_matches.contains_id(#id) { #access *#field_name = #field_value } } } else { quote_spanned!(field.span()=> #field_name: #field_value ) } } #[cfg(feature = "raw-deprecated")] pub fn raw_deprecated() -> TokenStream { quote! {} } #[cfg(not(feature = "raw-deprecated"))] pub fn raw_deprecated() -> TokenStream { quote! { #![allow(deprecated)] // Assuming any deprecation in here will be related to a deprecation in `Args` } } clap_derive-3.2.25/src/derives/into_app.rs000064400000000000000000000100011046102023000165710ustar 00000000000000// Copyright 2018 Guillaume Pinot (@TeXitoi) , // Kevin Knapp (@kbknapp) , and // Ana Hobden (@hoverbear) // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // // This work was derived from Structopt (https://github.com/TeXitoi/structopt) // commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the // MIT/Apache 2.0 license. use std::env; use proc_macro2::{Span, TokenStream}; use quote::quote; use syn::{Attribute, Generics, Ident}; use crate::{ attrs::{Attrs, Name, DEFAULT_CASING, DEFAULT_ENV_CASING}, utils::Sp, }; pub fn gen_for_struct( struct_name: &Ident, generics: &Generics, attrs: &[Attribute], ) -> TokenStream { let app_name = env::var("CARGO_PKG_NAME").ok().unwrap_or_default(); let attrs = Attrs::from_struct( Span::call_site(), attrs, Name::Assigned(quote!(#app_name)), Sp::call_site(DEFAULT_CASING), Sp::call_site(DEFAULT_ENV_CASING), ); let name = attrs.cased_name(); let app_var = Ident::new("__clap_app", Span::call_site()); let (impl_generics, ty_generics, where_clause) = generics.split_for_impl(); let tokens = quote! { #[allow(dead_code, unreachable_code, unused_variables, unused_braces)] #[allow( clippy::style, clippy::complexity, clippy::pedantic, clippy::restriction, clippy::perf, clippy::deprecated, clippy::nursery, clippy::cargo, clippy::suspicious_else_formatting, clippy::almost_swapped, )] #[allow(deprecated)] impl #impl_generics clap::CommandFactory for #struct_name #ty_generics #where_clause { fn into_app<'b>() -> clap::Command<'b> { let #app_var = clap::Command::new(#name); ::augment_args(#app_var) } fn into_app_for_update<'b>() -> clap::Command<'b> { let #app_var = clap::Command::new(#name); ::augment_args_for_update(#app_var) } } }; tokens } pub fn gen_for_enum(enum_name: &Ident, generics: &Generics, attrs: &[Attribute]) -> TokenStream { let app_name = env::var("CARGO_PKG_NAME").ok().unwrap_or_default(); let attrs = Attrs::from_struct( Span::call_site(), attrs, Name::Assigned(quote!(#app_name)), Sp::call_site(DEFAULT_CASING), Sp::call_site(DEFAULT_ENV_CASING), ); let name = attrs.cased_name(); let app_var = Ident::new("__clap_app", Span::call_site()); let (impl_generics, ty_generics, where_clause) = generics.split_for_impl(); quote! { #[allow(dead_code, unreachable_code, unused_variables, unused_braces)] #[allow( clippy::style, clippy::complexity, clippy::pedantic, clippy::restriction, clippy::perf, clippy::deprecated, clippy::nursery, clippy::cargo, clippy::suspicious_else_formatting, clippy::almost_swapped, )] impl #impl_generics clap::CommandFactory for #enum_name #ty_generics #where_clause { fn into_app<'b>() -> clap::Command<'b> { #[allow(deprecated)] let #app_var = clap::Command::new(#name) .setting(clap::AppSettings::SubcommandRequiredElseHelp); ::augment_subcommands(#app_var) } fn into_app_for_update<'b>() -> clap::Command<'b> { let #app_var = clap::Command::new(#name); ::augment_subcommands_for_update(#app_var) } } } } clap_derive-3.2.25/src/derives/mod.rs000064400000000000000000000015501046102023000155500ustar 00000000000000// Copyright 2018 Guillaume Pinot (@TeXitoi) , // Kevin Knapp (@kbknapp) , and // Ana Hobden (@hoverbear) // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // // This work was derived from Structopt (https://github.com/TeXitoi/structopt) // commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the // MIT/Apache 2.0 license. mod args; mod into_app; mod parser; mod subcommand; mod value_enum; pub use self::parser::derive_parser; pub use args::derive_args; pub use subcommand::derive_subcommand; pub use value_enum::derive_value_enum; clap_derive-3.2.25/src/derives/parser.rs000064400000000000000000000055231046102023000162710ustar 00000000000000// Copyright 2018 Guillaume Pinot (@TeXitoi) , // Kevin Knapp (@kbknapp) , and // Ana Hobden (@hoverbear) // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // // This work was derived from Structopt (https://github.com/TeXitoi/structopt) // commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the // MIT/Apache 2.0 license. use crate::{ derives::{args, into_app, subcommand}, dummies, }; use proc_macro2::TokenStream; use proc_macro_error::abort_call_site; use quote::quote; use syn::{ self, punctuated::Punctuated, token::Comma, Attribute, Data, DataEnum, DataStruct, DeriveInput, Field, Fields, Generics, Ident, }; pub fn derive_parser(input: &DeriveInput) -> TokenStream { let ident = &input.ident; match input.data { Data::Struct(DataStruct { fields: Fields::Named(ref fields), .. }) => { dummies::parser_struct(ident); gen_for_struct(ident, &input.generics, &fields.named, &input.attrs) } Data::Struct(DataStruct { fields: Fields::Unit, .. }) => { dummies::parser_struct(ident); gen_for_struct( ident, &input.generics, &Punctuated::::new(), &input.attrs, ) } Data::Enum(ref e) => { dummies::parser_enum(ident); gen_for_enum(ident, &input.generics, &input.attrs, e) } _ => abort_call_site!("`#[derive(Parser)]` only supports non-tuple structs and enums"), } } fn gen_for_struct( name: &Ident, generics: &Generics, fields: &Punctuated, attrs: &[Attribute], ) -> TokenStream { let into_app = into_app::gen_for_struct(name, generics, attrs); let args = args::gen_for_struct(name, generics, fields, attrs); let (impl_generics, ty_generics, where_clause) = generics.split_for_impl(); quote! { impl #impl_generics clap::Parser for #name #ty_generics #where_clause {} #into_app #args } } fn gen_for_enum( name: &Ident, generics: &Generics, attrs: &[Attribute], e: &DataEnum, ) -> TokenStream { let into_app = into_app::gen_for_enum(name, generics, attrs); let subcommand = subcommand::gen_for_enum(name, generics, attrs, e); let (impl_generics, ty_generics, where_clause) = generics.split_for_impl(); quote! { impl #impl_generics clap::Parser for #name #ty_generics #where_clause {} #into_app #subcommand } } clap_derive-3.2.25/src/derives/subcommand.rs000064400000000000000000000641301046102023000171240ustar 00000000000000// Copyright 2018 Guillaume Pinot (@TeXitoi) , // Kevin Knapp (@kbknapp) , and // Ana Hobden (@hoverbear) // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // // This work was derived from Structopt (https://github.com/TeXitoi/structopt) // commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the // MIT/Apache 2.0 license. use crate::{ attrs::{Attrs, Kind, Name, DEFAULT_CASING, DEFAULT_ENV_CASING}, derives::args, dummies, utils::{is_simple_ty, subty_if_name, Sp}, }; use proc_macro2::{Ident, Span, TokenStream}; use proc_macro_error::{abort, abort_call_site}; use quote::{format_ident, quote, quote_spanned}; use syn::{ punctuated::Punctuated, spanned::Spanned, Attribute, Data, DataEnum, DeriveInput, FieldsUnnamed, Generics, Token, Variant, }; pub fn derive_subcommand(input: &DeriveInput) -> TokenStream { let ident = &input.ident; dummies::subcommand(ident); match input.data { Data::Enum(ref e) => gen_for_enum(ident, &input.generics, &input.attrs, e), _ => abort_call_site!("`#[derive(Subcommand)]` only supports enums"), } } pub fn gen_for_enum( enum_name: &Ident, generics: &Generics, attrs: &[Attribute], e: &DataEnum, ) -> TokenStream { let from_arg_matches = gen_from_arg_matches_for_enum(enum_name, generics, attrs, e); let attrs = Attrs::from_struct( Span::call_site(), attrs, Name::Derived(enum_name.clone()), Sp::call_site(DEFAULT_CASING), Sp::call_site(DEFAULT_ENV_CASING), ); let augmentation = gen_augment(&e.variants, &attrs, false); let augmentation_update = gen_augment(&e.variants, &attrs, true); let has_subcommand = gen_has_subcommand(&e.variants, &attrs); let (impl_generics, ty_generics, where_clause) = generics.split_for_impl(); quote! { #from_arg_matches #[allow(dead_code, unreachable_code, unused_variables, unused_braces)] #[allow( clippy::style, clippy::complexity, clippy::pedantic, clippy::restriction, clippy::perf, clippy::deprecated, clippy::nursery, clippy::cargo, clippy::suspicious_else_formatting, clippy::almost_swapped, )] impl #impl_generics clap::Subcommand for #enum_name #ty_generics #where_clause { fn augment_subcommands <'b>(__clap_app: clap::Command<'b>) -> clap::Command<'b> { #augmentation } fn augment_subcommands_for_update <'b>(__clap_app: clap::Command<'b>) -> clap::Command<'b> { #augmentation_update } fn has_subcommand(__clap_name: &str) -> bool { #has_subcommand } } } } fn gen_from_arg_matches_for_enum( name: &Ident, generics: &Generics, attrs: &[Attribute], e: &DataEnum, ) -> TokenStream { let attrs = Attrs::from_struct( Span::call_site(), attrs, Name::Derived(name.clone()), Sp::call_site(DEFAULT_CASING), Sp::call_site(DEFAULT_ENV_CASING), ); let from_arg_matches = gen_from_arg_matches(name, &e.variants, &attrs); let update_from_arg_matches = gen_update_from_arg_matches(name, &e.variants, &attrs); let (impl_generics, ty_generics, where_clause) = generics.split_for_impl(); quote! { #[allow(dead_code, unreachable_code, unused_variables, unused_braces)] #[allow( clippy::style, clippy::complexity, clippy::pedantic, clippy::restriction, clippy::perf, clippy::deprecated, clippy::nursery, clippy::cargo, clippy::suspicious_else_formatting, clippy::almost_swapped, )] impl #impl_generics clap::FromArgMatches for #name #ty_generics #where_clause { fn from_arg_matches(__clap_arg_matches: &clap::ArgMatches) -> ::std::result::Result { Self::from_arg_matches_mut(&mut __clap_arg_matches.clone()) } #from_arg_matches fn update_from_arg_matches(&mut self, __clap_arg_matches: &clap::ArgMatches) -> ::std::result::Result<(), clap::Error> { self.update_from_arg_matches_mut(&mut __clap_arg_matches.clone()) } #update_from_arg_matches } } } fn gen_augment( variants: &Punctuated, parent_attribute: &Attrs, override_required: bool, ) -> TokenStream { use syn::Fields::*; let app_var = Ident::new("__clap_app", Span::call_site()); let subcommands: Vec<_> = variants .iter() .filter_map(|variant| { let attrs = Attrs::from_variant( variant, parent_attribute.casing(), parent_attribute.env_casing(), ); let kind = attrs.kind(); match &*kind { Kind::Skip(_) => None, Kind::ExternalSubcommand => { let ty = match variant.fields { Unnamed(ref fields) if fields.unnamed.len() == 1 => &fields.unnamed[0].ty, _ => abort!( variant, "The enum variant marked with `external_subcommand` must be \ a single-typed tuple, and the type must be either `Vec` \ or `Vec`." ), }; let subcommand = match subty_if_name(ty, "Vec") { Some(subty) => { if is_simple_ty(subty, "OsString") { quote_spanned! { kind.span()=> let #app_var = #app_var.allow_external_subcommands(true).allow_invalid_utf8_for_external_subcommands(true); } } else { quote_spanned! { kind.span()=> let #app_var = #app_var.allow_external_subcommands(true); } } } None => abort!( ty.span(), "The type must be `Vec<_>` \ to be used with `external_subcommand`." ), }; Some(subcommand) } Kind::Flatten => match variant.fields { Unnamed(FieldsUnnamed { ref unnamed, .. }) if unnamed.len() == 1 => { let ty = &unnamed[0]; let old_heading_var = format_ident!("__clap_old_heading"); let next_help_heading = attrs.next_help_heading(); let next_display_order = attrs.next_display_order(); let subcommand = if override_required { quote! { let #old_heading_var = #app_var.get_next_help_heading(); let #app_var = #app_var #next_help_heading #next_display_order; let #app_var = <#ty as clap::Subcommand>::augment_subcommands_for_update(#app_var); let #app_var = #app_var.next_help_heading(#old_heading_var); } } else { quote! { let #old_heading_var = #app_var.get_next_help_heading(); let #app_var = #app_var #next_help_heading #next_display_order; let #app_var = <#ty as clap::Subcommand>::augment_subcommands(#app_var); let #app_var = #app_var.next_help_heading(#old_heading_var); } }; Some(subcommand) } _ => abort!( variant, "`flatten` is usable only with single-typed tuple variants" ), }, Kind::Subcommand(_) => { let subcommand_var = Ident::new("__clap_subcommand", Span::call_site()); let arg_block = match variant.fields { Named(_) => { abort!(variant, "non single-typed tuple enums are not supported") } Unit => quote!( #subcommand_var ), Unnamed(FieldsUnnamed { ref unnamed, .. }) if unnamed.len() == 1 => { let ty = &unnamed[0]; if override_required { quote_spanned! { ty.span()=> { <#ty as clap::Subcommand>::augment_subcommands_for_update(#subcommand_var) } } } else { quote_spanned! { ty.span()=> { <#ty as clap::Subcommand>::augment_subcommands(#subcommand_var) } } } } Unnamed(..) => { abort!(variant, "non single-typed tuple enums are not supported") } }; let name = attrs.cased_name(); let initial_app_methods = attrs.initial_top_level_methods(); let final_from_attrs = attrs.final_top_level_methods(); let subcommand = quote! { let #app_var = #app_var.subcommand({ let #subcommand_var = clap::Command::new(#name); let #subcommand_var = #subcommand_var #initial_app_methods; let #subcommand_var = #arg_block; #[allow(deprecated)] let #subcommand_var = #subcommand_var.setting(clap::AppSettings::SubcommandRequiredElseHelp); #subcommand_var #final_from_attrs }); }; Some(subcommand) } _ => { let subcommand_var = Ident::new("__clap_subcommand", Span::call_site()); let sub_augment = match variant.fields { Named(ref fields) => { // Defer to `gen_augment` for adding cmd methods args::gen_augment(&fields.named, &subcommand_var, &attrs, override_required) } Unit => { let arg_block = quote!( #subcommand_var ); let initial_app_methods = attrs.initial_top_level_methods(); let final_from_attrs = attrs.final_top_level_methods(); quote! { let #subcommand_var = #subcommand_var #initial_app_methods; let #subcommand_var = #arg_block; #subcommand_var #final_from_attrs } }, Unnamed(FieldsUnnamed { ref unnamed, .. }) if unnamed.len() == 1 => { let ty = &unnamed[0]; let arg_block = if override_required { quote_spanned! { ty.span()=> { <#ty as clap::Args>::augment_args_for_update(#subcommand_var) } } } else { quote_spanned! { ty.span()=> { <#ty as clap::Args>::augment_args(#subcommand_var) } } }; let initial_app_methods = attrs.initial_top_level_methods(); let final_from_attrs = attrs.final_top_level_methods(); quote! { let #subcommand_var = #subcommand_var #initial_app_methods; let #subcommand_var = #arg_block; #subcommand_var #final_from_attrs } } Unnamed(..) => { abort!(variant, "non single-typed tuple enums are not supported") } }; let name = attrs.cased_name(); let subcommand = quote! { let #app_var = #app_var.subcommand({ let #subcommand_var = clap::Command::new(#name); #sub_augment }); }; Some(subcommand) } } }) .collect(); let initial_app_methods = parent_attribute.initial_top_level_methods(); let final_app_methods = parent_attribute.final_top_level_methods(); quote! { let #app_var = #app_var #initial_app_methods; #( #subcommands )*; #app_var #final_app_methods } } fn gen_has_subcommand( variants: &Punctuated, parent_attribute: &Attrs, ) -> TokenStream { use syn::Fields::*; let mut ext_subcmd = false; let (flatten_variants, variants): (Vec<_>, Vec<_>) = variants .iter() .filter_map(|variant| { let attrs = Attrs::from_variant( variant, parent_attribute.casing(), parent_attribute.env_casing(), ); if let Kind::ExternalSubcommand = &*attrs.kind() { ext_subcmd = true; None } else { Some((variant, attrs)) } }) .partition(|(_, attrs)| { let kind = attrs.kind(); matches!(&*kind, Kind::Flatten) }); let subcommands = variants.iter().map(|(_variant, attrs)| { let sub_name = attrs.cased_name(); quote! { if #sub_name == __clap_name { return true } } }); let child_subcommands = flatten_variants .iter() .map(|(variant, _attrs)| match variant.fields { Unnamed(ref fields) if fields.unnamed.len() == 1 => { let ty = &fields.unnamed[0]; quote! { if <#ty as clap::Subcommand>::has_subcommand(__clap_name) { return true; } } } _ => abort!( variant, "`flatten` is usable only with single-typed tuple variants" ), }); if ext_subcmd { quote! { true } } else { quote! { #( #subcommands )* #( #child_subcommands )else* false } } } fn gen_from_arg_matches( name: &Ident, variants: &Punctuated, parent_attribute: &Attrs, ) -> TokenStream { use syn::Fields::*; let mut ext_subcmd = None; let subcommand_name_var = format_ident!("__clap_name"); let sub_arg_matches_var = format_ident!("__clap_arg_matches"); let (flatten_variants, variants): (Vec<_>, Vec<_>) = variants .iter() .filter_map(|variant| { let attrs = Attrs::from_variant( variant, parent_attribute.casing(), parent_attribute.env_casing(), ); if let Kind::ExternalSubcommand = &*attrs.kind() { if ext_subcmd.is_some() { abort!( attrs.kind().span(), "Only one variant can be marked with `external_subcommand`, \ this is the second" ); } let ty = match variant.fields { Unnamed(ref fields) if fields.unnamed.len() == 1 => &fields.unnamed[0].ty, _ => abort!( variant, "The enum variant marked with `external_subcommand` must be \ a single-typed tuple, and the type must be either `Vec` \ or `Vec`." ), }; let (span, str_ty) = match subty_if_name(ty, "Vec") { Some(subty) => { if is_simple_ty(subty, "String") { (subty.span(), quote!(::std::string::String)) } else if is_simple_ty(subty, "OsString") { (subty.span(), quote!(::std::ffi::OsString)) } else { abort!( ty.span(), "The type must be either `Vec` or `Vec` \ to be used with `external_subcommand`." ); } } None => abort!( ty.span(), "The type must be either `Vec` or `Vec` \ to be used with `external_subcommand`." ), }; ext_subcmd = Some((span, &variant.ident, str_ty)); None } else { Some((variant, attrs)) } }) .partition(|(_, attrs)| { let kind = attrs.kind(); matches!(&*kind, Kind::Flatten) }); let subcommands = variants.iter().map(|(variant, attrs)| { let sub_name = attrs.cased_name(); let variant_name = &variant.ident; let constructor_block = match variant.fields { Named(ref fields) => args::gen_constructor(&fields.named, attrs), Unit => quote!(), Unnamed(ref fields) if fields.unnamed.len() == 1 => { let ty = &fields.unnamed[0]; quote!( ( <#ty as clap::FromArgMatches>::from_arg_matches_mut(__clap_arg_matches)? ) ) } Unnamed(..) => abort_call_site!("{}: tuple enums are not supported", variant.ident), }; if cfg!(feature = "unstable-v4") { quote! { if #sub_name == #subcommand_name_var && !#sub_arg_matches_var.contains_id("") { return ::std::result::Result::Ok(#name :: #variant_name #constructor_block) } } } else { quote! { if #sub_name == #subcommand_name_var { return ::std::result::Result::Ok(#name :: #variant_name #constructor_block) } } } }); let child_subcommands = flatten_variants.iter().map(|(variant, _attrs)| { let variant_name = &variant.ident; match variant.fields { Unnamed(ref fields) if fields.unnamed.len() == 1 => { let ty = &fields.unnamed[0]; quote! { if __clap_arg_matches .subcommand_name() .map(|__clap_name| <#ty as clap::Subcommand>::has_subcommand(__clap_name)) .unwrap_or_default() { let __clap_res = <#ty as clap::FromArgMatches>::from_arg_matches_mut(__clap_arg_matches)?; return ::std::result::Result::Ok(#name :: #variant_name (__clap_res)); } } } _ => abort!( variant, "`flatten` is usable only with single-typed tuple variants" ), } }); let wildcard = match ext_subcmd { Some((span, var_name, str_ty)) => quote_spanned! { span=> ::std::result::Result::Ok(#name::#var_name( ::std::iter::once(#str_ty::from(#subcommand_name_var)) .chain( #sub_arg_matches_var .remove_many::<#str_ty>("") .into_iter().flatten() // `""` isn't present, bug in `unstable-v4` .map(#str_ty::from) ) .collect::<::std::vec::Vec<_>>() )) }, None => quote! { ::std::result::Result::Err(clap::Error::raw(clap::ErrorKind::UnrecognizedSubcommand, format!("The subcommand '{}' wasn't recognized", #subcommand_name_var))) }, }; let raw_deprecated = args::raw_deprecated(); quote! { fn from_arg_matches_mut(__clap_arg_matches: &mut clap::ArgMatches) -> ::std::result::Result { #raw_deprecated #( #child_subcommands )else* if let Some((#subcommand_name_var, mut __clap_arg_sub_matches)) = __clap_arg_matches.remove_subcommand() { let #sub_arg_matches_var = &mut __clap_arg_sub_matches; #( #subcommands )* #wildcard } else { ::std::result::Result::Err(clap::Error::raw(clap::ErrorKind::MissingSubcommand, "A subcommand is required but one was not provided.")) } } } } fn gen_update_from_arg_matches( name: &Ident, variants: &Punctuated, parent_attribute: &Attrs, ) -> TokenStream { use syn::Fields::*; let (flatten, variants): (Vec<_>, Vec<_>) = variants .iter() .filter_map(|variant| { let attrs = Attrs::from_variant( variant, parent_attribute.casing(), parent_attribute.env_casing(), ); match &*attrs.kind() { // Fallback to `from_arg_matches_mut` Kind::ExternalSubcommand => None, _ => Some((variant, attrs)), } }) .partition(|(_, attrs)| { let kind = attrs.kind(); matches!(&*kind, Kind::Flatten) }); let subcommands = variants.iter().map(|(variant, attrs)| { let sub_name = attrs.cased_name(); let variant_name = &variant.ident; let (pattern, updater) = match variant.fields { Named(ref fields) => { let (fields, update): (Vec<_>, Vec<_>) = fields .named .iter() .map(|field| { let attrs = Attrs::from_field( field, parent_attribute.casing(), parent_attribute.env_casing(), ); let field_name = field.ident.as_ref().unwrap(); ( quote!( ref mut #field_name ), args::gen_updater(&fields.named, &attrs, false), ) }) .unzip(); (quote!( { #( #fields, )* }), quote!( { #( #update )* } )) } Unit => (quote!(), quote!({})), Unnamed(ref fields) => { if fields.unnamed.len() == 1 { ( quote!((ref mut __clap_arg)), quote!(clap::FromArgMatches::update_from_arg_matches_mut( __clap_arg, __clap_arg_matches )?), ) } else { abort_call_site!("{}: tuple enums are not supported", variant.ident) } } }; quote! { #name :: #variant_name #pattern if #sub_name == __clap_name => { let (_, mut __clap_arg_sub_matches) = __clap_arg_matches.remove_subcommand().unwrap(); let __clap_arg_matches = &mut __clap_arg_sub_matches; #updater } } }); let child_subcommands = flatten.iter().map(|(variant, _attrs)| { let variant_name = &variant.ident; match variant.fields { Unnamed(ref fields) if fields.unnamed.len() == 1 => { let ty = &fields.unnamed[0]; quote! { if <#ty as clap::Subcommand>::has_subcommand(__clap_name) { if let #name :: #variant_name (child) = s { <#ty as clap::FromArgMatches>::update_from_arg_matches_mut(child, __clap_arg_matches)?; return ::std::result::Result::Ok(()); } } } } _ => abort!( variant, "`flatten` is usable only with single-typed tuple variants" ), } }); let raw_deprecated = args::raw_deprecated(); quote! { fn update_from_arg_matches_mut<'b>( &mut self, __clap_arg_matches: &mut clap::ArgMatches, ) -> ::std::result::Result<(), clap::Error> { #raw_deprecated if let Some(__clap_name) = __clap_arg_matches.subcommand_name() { match self { #( #subcommands ),* s => { #( #child_subcommands )* *s = ::from_arg_matches_mut(__clap_arg_matches)?; } } } ::std::result::Result::Ok(()) } } } clap_derive-3.2.25/src/derives/value_enum.rs000064400000000000000000000074561046102023000171440ustar 00000000000000// Copyright 2018 Guillaume Pinot (@TeXitoi) , // Kevin Knapp (@kbknapp) , and // Ana Hobden (@hoverbear) // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. use crate::{ attrs::{Attrs, Kind, Name, DEFAULT_CASING, DEFAULT_ENV_CASING}, dummies, utils::Sp, }; use proc_macro2::{Span, TokenStream}; use proc_macro_error::{abort, abort_call_site}; use quote::quote; use quote::quote_spanned; use syn::{ punctuated::Punctuated, spanned::Spanned, token::Comma, Attribute, Data, DataEnum, DeriveInput, Fields, Ident, Variant, }; pub fn derive_value_enum(input: &DeriveInput) -> TokenStream { let ident = &input.ident; dummies::value_enum(ident); match input.data { Data::Enum(ref e) => gen_for_enum(ident, &input.attrs, e), _ => abort_call_site!("`#[derive(ValueEnum)]` only supports enums"), } } pub fn gen_for_enum(name: &Ident, attrs: &[Attribute], e: &DataEnum) -> TokenStream { let attrs = Attrs::from_struct( Span::call_site(), attrs, Name::Derived(name.clone()), Sp::call_site(DEFAULT_CASING), Sp::call_site(DEFAULT_ENV_CASING), ); let lits = lits(&e.variants, &attrs); let value_variants = gen_value_variants(&lits); let to_possible_value = gen_to_possible_value(&lits); quote! { #[allow(dead_code, unreachable_code, unused_variables, unused_braces)] #[allow( clippy::style, clippy::complexity, clippy::pedantic, clippy::restriction, clippy::perf, clippy::deprecated, clippy::nursery, clippy::cargo, clippy::suspicious_else_formatting, clippy::almost_swapped, )] impl clap::ValueEnum for #name { #value_variants #to_possible_value } } } fn lits( variants: &Punctuated, parent_attribute: &Attrs, ) -> Vec<(TokenStream, Ident)> { variants .iter() .filter_map(|variant| { let attrs = Attrs::from_value_enum_variant( variant, parent_attribute.casing(), parent_attribute.env_casing(), ); if let Kind::Skip(_) = &*attrs.kind() { None } else { if !matches!(variant.fields, Fields::Unit) { abort!(variant.span(), "`#[derive(ValueEnum)]` only supports unit variants. Non-unit variants must be skipped"); } let fields = attrs.field_methods(false); let name = attrs.cased_name(); Some(( quote_spanned! { variant.span()=> clap::PossibleValue::new(#name) #fields }, variant.ident.clone(), )) } }) .collect::>() } fn gen_value_variants(lits: &[(TokenStream, Ident)]) -> TokenStream { let lit = lits.iter().map(|l| &l.1).collect::>(); quote! { fn value_variants<'a>() -> &'a [Self]{ &[#(Self::#lit),*] } } } fn gen_to_possible_value(lits: &[(TokenStream, Ident)]) -> TokenStream { let (lit, variant): (Vec, Vec) = lits.iter().cloned().unzip(); quote! { fn to_possible_value<'a>(&self) -> ::std::option::Option> { match self { #(Self::#variant => Some(#lit),)* _ => None } } } } clap_derive-3.2.25/src/dummies.rs000064400000000000000000000051351046102023000147760ustar 00000000000000//! Dummy implementations that we emit along with an error. use proc_macro2::Ident; use proc_macro_error::append_dummy; use quote::quote; pub fn parser_struct(name: &Ident) { into_app(name); args(name); append_dummy(quote!( impl clap::Parser for #name {} )); } pub fn parser_enum(name: &Ident) { into_app(name); subcommand(name); append_dummy(quote!( impl clap::Parser for #name {} )); } pub fn into_app(name: &Ident) { append_dummy(quote! { #[allow(deprecated)] impl clap::CommandFactory for #name { fn into_app<'b>() -> clap::Command<'b> { unimplemented!() } fn into_app_for_update<'b>() -> clap::Command<'b> { unimplemented!() } } }); } pub fn from_arg_matches(name: &Ident) { append_dummy(quote! { impl clap::FromArgMatches for #name { fn from_arg_matches(_m: &clap::ArgMatches) -> ::std::result::Result { unimplemented!() } fn update_from_arg_matches(&mut self, matches: &clap::ArgMatches) -> ::std::result::Result<(), clap::Error>{ unimplemented!() } } }); } pub fn subcommand(name: &Ident) { from_arg_matches(name); append_dummy(quote! { impl clap::Subcommand for #name { fn augment_subcommands(_cmd: clap::Command<'_>) -> clap::Command<'_> { unimplemented!() } fn augment_subcommands_for_update(_cmd: clap::Command<'_>) -> clap::Command<'_> { unimplemented!() } fn has_subcommand(name: &str) -> bool { unimplemented!() } } }); } pub fn args(name: &Ident) { from_arg_matches(name); append_dummy(quote! { impl clap::Args for #name { fn augment_args(_cmd: clap::Command<'_>) -> clap::Command<'_> { unimplemented!() } fn augment_args_for_update(_cmd: clap::Command<'_>) -> clap::Command<'_> { unimplemented!() } } }); } pub fn value_enum(name: &Ident) { append_dummy(quote! { impl clap::ValueEnum for #name { fn value_variants<'a>() -> &'a [Self]{ unimplemented!() } fn from_str(_input: &str, _ignore_case: bool) -> ::std::result::Result { unimplemented!() } fn to_possible_value<'a>(&self) -> ::std::option::Option>{ unimplemented!() } } }) } clap_derive-3.2.25/src/lib.rs000064400000000000000000000050421046102023000140760ustar 00000000000000// Copyright 2018 Guillaume Pinot (@TeXitoi) , // Kevin Knapp (@kbknapp) , and // Ana Hobden (@hoverbear) // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // // This work was derived from Structopt (https://github.com/TeXitoi/structopt) // commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the // MIT/Apache 2.0 license. #![doc(html_logo_url = "https://raw.githubusercontent.com/clap-rs/clap/master/assets/clap.png")] #![doc = include_str!("../README.md")] #![forbid(unsafe_code)] extern crate proc_macro; use proc_macro::TokenStream; use proc_macro_error::proc_macro_error; use syn::{parse_macro_input, DeriveInput}; mod attrs; mod derives; mod dummies; mod parse; mod utils; /// Generates the `ValueEnum` impl. #[proc_macro_derive(ValueEnum, attributes(clap))] #[proc_macro_error] pub fn value_enum(input: TokenStream) -> TokenStream { let input: DeriveInput = parse_macro_input!(input); derives::derive_value_enum(&input).into() } /// Generates the `ValueEnum` impl. #[proc_macro_derive(ArgEnum, attributes(clap))] #[proc_macro_error] pub fn arg_enum(input: TokenStream) -> TokenStream { let input: DeriveInput = parse_macro_input!(input); derives::derive_value_enum(&input).into() } /// Generates the `Parser` implementation. /// /// This is far less verbose than defining the `clap::Command` struct manually, /// receiving an instance of `clap::ArgMatches` from conducting parsing, and then /// implementing a conversion code to instantiate an instance of the user /// context struct. #[proc_macro_derive(Parser, attributes(clap, structopt))] #[proc_macro_error] pub fn parser(input: TokenStream) -> TokenStream { let input: DeriveInput = parse_macro_input!(input); derives::derive_parser(&input).into() } /// Generates the `Subcommand` impl. #[proc_macro_derive(Subcommand, attributes(clap))] #[proc_macro_error] pub fn subcommand(input: TokenStream) -> TokenStream { let input: DeriveInput = parse_macro_input!(input); derives::derive_subcommand(&input).into() } /// Generates the `Args` impl. #[proc_macro_derive(Args, attributes(clap))] #[proc_macro_error] pub fn args(input: TokenStream) -> TokenStream { let input: DeriveInput = parse_macro_input!(input); derives::derive_args(&input).into() } clap_derive-3.2.25/src/parse.rs000064400000000000000000000235161046102023000144500ustar 00000000000000use std::iter::FromIterator; use proc_macro_error::{abort, ResultExt}; use quote::ToTokens; use syn::{ self, parenthesized, parse::{Parse, ParseBuffer, ParseStream}, punctuated::Punctuated, Attribute, Expr, ExprLit, Ident, Lit, LitBool, LitStr, Token, }; pub fn parse_clap_attributes(all_attrs: &[Attribute]) -> Vec { all_attrs .iter() .filter(|attr| attr.path.is_ident("clap") || attr.path.is_ident("structopt")) .flat_map(|attr| { attr.parse_args_with(Punctuated::::parse_terminated) .unwrap_or_abort() }) .collect() } #[allow(clippy::large_enum_variant)] #[derive(Clone)] pub enum ClapAttr { // single-identifier attributes Short(Ident), Long(Ident), ValueParser(Ident), Action(Ident), Env(Ident), Flatten(Ident), ValueEnum(Ident), FromGlobal(Ident), Subcommand(Ident), VerbatimDocComment(Ident), ExternalSubcommand(Ident), About(Ident), Author(Ident), Version(Ident), // ident = "string literal" RenameAllEnv(Ident, LitStr), RenameAll(Ident, LitStr), NameLitStr(Ident, LitStr), // parse(parser_kind [= parser_func]) Parse(Ident, ParserSpec), // ident [= arbitrary_expr] Skip(Ident, Option), // ident = arbitrary_expr NameExpr(Ident, Expr), DefaultValueT(Ident, Option), DefaultValuesT(Ident, Expr), DefaultValueOsT(Ident, Option), DefaultValuesOsT(Ident, Expr), NextDisplayOrder(Ident, Expr), NextHelpHeading(Ident, Expr), HelpHeading(Ident, Expr), // ident(arbitrary_expr,*) MethodCall(Ident, Vec), } impl Parse for ClapAttr { fn parse(input: ParseStream) -> syn::Result { use self::ClapAttr::*; let name: Ident = input.parse()?; let name_str = name.to_string(); if input.peek(Token![=]) { // `name = value` attributes. let assign_token = input.parse::()?; // skip '=' if input.peek(LitStr) { let lit: LitStr = input.parse()?; match &*name_str { "rename_all" => Ok(RenameAll(name, lit)), "rename_all_env" => Ok(RenameAllEnv(name, lit)), "skip" => { let expr = ExprLit { attrs: vec![], lit: Lit::Str(lit), }; let expr = Expr::Lit(expr); Ok(Skip(name, Some(expr))) } "next_display_order" => { let expr = ExprLit { attrs: vec![], lit: Lit::Str(lit), }; let expr = Expr::Lit(expr); Ok(NextDisplayOrder(name, expr)) } "next_help_heading" => { let expr = ExprLit { attrs: vec![], lit: Lit::Str(lit), }; let expr = Expr::Lit(expr); Ok(NextHelpHeading(name, expr)) } "help_heading" => { let expr = ExprLit { attrs: vec![], lit: Lit::Str(lit), }; let expr = Expr::Lit(expr); Ok(HelpHeading(name, expr)) } _ => Ok(NameLitStr(name, lit)), } } else { match input.parse::() { Ok(expr) => match &*name_str { "skip" => Ok(Skip(name, Some(expr))), "default_value_t" => Ok(DefaultValueT(name, Some(expr))), "default_values_t" => Ok(DefaultValuesT(name, expr)), "default_value_os_t" => Ok(DefaultValueOsT(name, Some(expr))), "default_values_os_t" => Ok(DefaultValuesOsT(name, expr)), "next_display_order" => Ok(NextDisplayOrder(name, expr)), "next_help_heading" => Ok(NextHelpHeading(name, expr)), "help_heading" => Ok(HelpHeading(name, expr)), _ => Ok(NameExpr(name, expr)), }, Err(_) => abort! { assign_token, "expected `string literal` or `expression` after `=`" }, } } } else if input.peek(syn::token::Paren) { // `name(...)` attributes. let nested; parenthesized!(nested in input); match name_str.as_ref() { "parse" => { let parser_specs: Punctuated = nested.parse_terminated(ParserSpec::parse)?; if parser_specs.len() == 1 { Ok(Parse(name, parser_specs[0].clone())) } else { abort!(name, "parse must have exactly one argument") } } "raw" => match nested.parse::() { Ok(bool_token) => { let expr = ExprLit { attrs: vec![], lit: Lit::Bool(bool_token), }; let expr = Expr::Lit(expr); Ok(MethodCall(name, vec![expr])) } Err(_) => { abort!(name, "`#[clap(raw(...))` attributes are removed, \ they are replaced with raw methods"; help = "if you meant to call `clap::Arg::raw()` method \ you should use bool literal, like `raw(true)` or `raw(false)`"; note = raw_method_suggestion(nested); ); } }, _ => { let method_args: Punctuated<_, Token![,]> = nested.parse_terminated(Expr::parse)?; Ok(MethodCall(name, Vec::from_iter(method_args))) } } } else { // Attributes represented with a sole identifier. match name_str.as_ref() { "long" => Ok(Long(name)), "short" => Ok(Short(name)), "value_parser" => Ok(ValueParser(name)), "action" => Ok(Action(name)), "env" => Ok(Env(name)), "flatten" => Ok(Flatten(name)), "arg_enum" => Ok(ValueEnum(name)), "value_enum" => Ok(ValueEnum(name)), "from_global" => Ok(FromGlobal(name)), "subcommand" => Ok(Subcommand(name)), "external_subcommand" => Ok(ExternalSubcommand(name)), "verbatim_doc_comment" => Ok(VerbatimDocComment(name)), "default_value" => { abort!(name, "`#[clap(default_value)` attribute (without a value) has been replaced by `#[clap(default_value_t)]`."; help = "Change the attribute to `#[clap(default_value_t)]`"; ) } "default_value_t" => Ok(DefaultValueT(name, None)), "default_value_os_t" => Ok(DefaultValueOsT(name, None)), "about" => Ok(About(name)), "author" => Ok(Author(name)), "version" => Ok(Version(name)), "skip" => Ok(Skip(name, None)), _ => abort!(name, "unexpected attribute: {}", name_str), } } } } #[derive(Clone)] pub struct ParserSpec { pub kind: Ident, pub eq_token: Option, pub parse_func: Option, } impl Parse for ParserSpec { fn parse(input: ParseStream<'_>) -> syn::Result { let kind = input .parse() .map_err(|_| input.error("parser specification must start with identifier"))?; let eq_token = input.parse()?; let parse_func = match eq_token { None => None, Some(_) => Some(input.parse()?), }; Ok(ParserSpec { kind, eq_token, parse_func, }) } } fn raw_method_suggestion(ts: ParseBuffer) -> String { let do_parse = move || -> Result<(Ident, Punctuated), syn::Error> { let name = ts.parse()?; let _eq: Token![=] = ts.parse()?; let val: LitStr = ts.parse()?; let exprs = val.parse_with(Punctuated::::parse_terminated)?; Ok((name, exprs)) }; fn to_string(val: &T) -> String { val.to_token_stream() .to_string() .replace(' ', "") .replace(',', ", ") } if let Ok((name, exprs)) = do_parse() { let suggestion = if exprs.len() == 1 { let val = to_string(&exprs[0]); format!(" = {}", val) } else { let val = exprs .into_iter() .map(|expr| to_string(&expr)) .collect::>() .join(", "); format!("({})", val) }; format!( "if you need to call `clap::Arg/Command::{}` method you \ can do it like this: #[clap({}{})]", name, name, suggestion ) } else { "if you need to call some method from `clap::Arg/Command` \ you should use raw method, see \ https://github.com/clap-rs/clap/blob/master/examples/derive_ref/README.md#raw-attributes" .into() } } clap_derive-3.2.25/src/utils/doc_comments.rs000064400000000000000000000055221046102023000171450ustar 00000000000000//! The preprocessing we apply to doc comments. //! //! #[derive(Parser)] works in terms of "paragraphs". Paragraph is a sequence of //! non-empty adjacent lines, delimited by sequences of blank (whitespace only) lines. use crate::attrs::Method; use quote::{format_ident, quote}; use std::iter; pub fn process_doc_comment(lines: Vec, name: &str, preprocess: bool) -> Vec { // multiline comments (`/** ... */`) may have LFs (`\n`) in them, // we need to split so we could handle the lines correctly // // we also need to remove leading and trailing blank lines let mut lines: Vec<&str> = lines .iter() .skip_while(|s| is_blank(s)) .flat_map(|s| s.split('\n')) .collect(); while let Some(true) = lines.last().map(|s| is_blank(s)) { lines.pop(); } // remove one leading space no matter what for line in lines.iter_mut() { if line.starts_with(' ') { *line = &line[1..]; } } if lines.is_empty() { return vec![]; } let short_name = format_ident!("{}", name); let long_name = format_ident!("long_{}", name); if let Some(first_blank) = lines.iter().position(|s| is_blank(s)) { let (short, long) = if preprocess { let paragraphs = split_paragraphs(&lines); let short = paragraphs[0].clone(); let long = paragraphs.join("\n\n"); (remove_period(short), long) } else { let short = lines[..first_blank].join("\n"); let long = lines.join("\n"); (short, long) }; vec![ Method::new(short_name, quote!(#short)), Method::new(long_name, quote!(#long)), ] } else { let short = if preprocess { let s = merge_lines(&lines); remove_period(s) } else { lines.join("\n") }; vec![ Method::new(short_name, quote!(#short)), Method::new(long_name, quote!(None)), ] } } fn split_paragraphs(lines: &[&str]) -> Vec { let mut last_line = 0; iter::from_fn(|| { let slice = &lines[last_line..]; let start = slice.iter().position(|s| !is_blank(s)).unwrap_or(0); let slice = &slice[start..]; let len = slice .iter() .position(|s| is_blank(s)) .unwrap_or(slice.len()); last_line += start + len; if len != 0 { Some(merge_lines(&slice[..len])) } else { None } }) .collect() } fn remove_period(mut s: String) -> String { if s.ends_with('.') && !s.ends_with("..") { s.pop(); } s } fn is_blank(s: &str) -> bool { s.trim().is_empty() } fn merge_lines(lines: &[&str]) -> String { lines.iter().map(|s| s.trim()).collect::>().join(" ") } clap_derive-3.2.25/src/utils/mod.rs000064400000000000000000000002641046102023000152500ustar 00000000000000mod doc_comments; mod spanned; mod ty; pub use self::{ doc_comments::process_doc_comment, spanned::Sp, ty::{inner_type, is_simple_ty, sub_type, subty_if_name, Ty}, }; clap_derive-3.2.25/src/utils/spanned.rs000064400000000000000000000034001046102023000161140ustar 00000000000000use proc_macro2::{Ident, Span, TokenStream}; use quote::ToTokens; use syn::LitStr; use std::ops::{Deref, DerefMut}; /// An entity with a span attached. #[derive(Debug, Clone)] pub struct Sp { val: T, span: Span, } impl Sp { pub fn new(val: T, span: Span) -> Self { Sp { val, span } } pub fn call_site(val: T) -> Self { Sp { val, span: Span::call_site(), } } pub fn span(&self) -> Span { self.span } } impl Deref for Sp { type Target = T; fn deref(&self) -> &T { &self.val } } impl DerefMut for Sp { fn deref_mut(&mut self) -> &mut T { &mut self.val } } impl From for Sp { fn from(ident: Ident) -> Self { Sp { val: ident.to_string(), span: ident.span(), } } } impl From for Sp { fn from(lit: LitStr) -> Self { Sp { val: lit.value(), span: lit.span(), } } } impl<'a> From> for Sp { fn from(sp: Sp<&'a str>) -> Self { Sp::new(sp.val.into(), sp.span) } } impl> PartialEq for Sp { fn eq(&self, other: &U) -> bool { self.val == *other } } impl> AsRef for Sp { fn as_ref(&self) -> &str { self.val.as_ref() } } impl ToTokens for Sp { fn to_tokens(&self, stream: &mut TokenStream) { // this is the simplest way out of correct ones to change span on // arbitrary token tree I could come up with let tt = self.val.to_token_stream().into_iter().map(|mut tt| { tt.set_span(self.span); tt }); stream.extend(tt); } } clap_derive-3.2.25/src/utils/ty.rs000064400000000000000000000056271046102023000151350ustar 00000000000000//! Special types handling use super::spanned::Sp; use syn::{ spanned::Spanned, GenericArgument, Path, PathArguments, PathArguments::AngleBracketed, PathSegment, Type, TypePath, }; #[derive(Copy, Clone, PartialEq, Debug)] pub enum Ty { Vec, Option, OptionOption, OptionVec, Other, } impl Ty { pub fn from_syn_ty(ty: &syn::Type) -> Sp { use self::Ty::*; let t = |kind| Sp::new(kind, ty.span()); if is_generic_ty(ty, "Vec") { t(Vec) } else if let Some(subty) = subty_if_name(ty, "Option") { if is_generic_ty(subty, "Option") { t(OptionOption) } else if is_generic_ty(subty, "Vec") { t(OptionVec) } else { t(Option) } } else { t(Other) } } } pub fn inner_type(field_ty: &syn::Type) -> &syn::Type { let ty = Ty::from_syn_ty(field_ty); match *ty { Ty::Vec | Ty::Option => sub_type(field_ty).unwrap_or(field_ty), Ty::OptionOption | Ty::OptionVec => { sub_type(field_ty).and_then(sub_type).unwrap_or(field_ty) } _ => field_ty, } } pub fn sub_type(ty: &syn::Type) -> Option<&syn::Type> { subty_if(ty, |_| true) } fn only_last_segment(mut ty: &syn::Type) -> Option<&PathSegment> { while let syn::Type::Group(syn::TypeGroup { elem, .. }) = ty { ty = elem; } match ty { Type::Path(TypePath { qself: None, path: Path { leading_colon: None, segments, }, }) => only_one(segments.iter()), _ => None, } } fn subty_if(ty: &syn::Type, f: F) -> Option<&syn::Type> where F: FnOnce(&PathSegment) -> bool, { only_last_segment(ty) .filter(|segment| f(segment)) .and_then(|segment| { if let AngleBracketed(args) = &segment.arguments { only_one(args.args.iter()).and_then(|genneric| { if let GenericArgument::Type(ty) = genneric { Some(ty) } else { None } }) } else { None } }) } pub fn subty_if_name<'a>(ty: &'a syn::Type, name: &str) -> Option<&'a syn::Type> { subty_if(ty, |seg| seg.ident == name) } pub fn is_simple_ty(ty: &syn::Type, name: &str) -> bool { only_last_segment(ty) .map(|segment| { if let PathArguments::None = segment.arguments { segment.ident == name } else { false } }) .unwrap_or(false) } fn is_generic_ty(ty: &syn::Type, name: &str) -> bool { subty_if_name(ty, name).is_some() } fn only_one(mut iter: I) -> Option where I: Iterator, { iter.next().filter(|_| iter.next().is_none()) }