From 5e20a29b4fdc8a2d442d1093681b396dcb4b816b Mon Sep 17 00:00:00 2001 From: Robin Krahl Date: Tue, 7 Jan 2020 11:18:04 +0000 Subject: Add structopt dependency in version 0.3.7 This patch series replaces argparse with structopt in the argument handling code. As a first step, we need structopt as a dependency. Import subrepo structopt/:structopt at efbdda4753592e27bc430fb01f7b9650b2f3174d Import subrepo bitflags/:bitflags at 30668016aca6bd3b02c766e8347e0b4080d4c296 Import subrepo clap/:clap at 784524f7eb193e35f81082cc69454c8c21b948f7 Import subrepo heck/:heck at 093d56fbf001e1506e56dbfa38631d99b1066df1 Import subrepo proc-macro-error/:proc-macro-error at 6c4cfe79a622c5de8ae68557993542be46eacae2 Import subrepo proc-macro2/:proc-macro2 at d5d48eddca4566e5438e8a2cbed4a74e049544de Import subrepo quote/:quote at 727436c6c137b20f0f34dde5d8fda2679b9747ad Import subrepo rustversion/:rustversion at 0c5663313516263059ce9059ef81fc7a1cf655ca Import subrepo syn-mid/:syn-mid at 5d3d85414a9e6674e1857ec22a87b96e04a6851a Import subrepo syn/:syn at e87c27e87f6f4ef8919d0372bdb056d53ef0d8f3 Import subrepo textwrap/:textwrap at abcd618beae3f74841032aa5b53c1086b0a57ca2 Import subrepo unicode-segmentation/:unicode-segmentation at 637c9874c4fe0c205ff27787faf150a40295c6c3 Import subrepo unicode-width/:unicode-width at 3033826f8bf05e82724140a981d5941e48fce393 Import subrepo unicode-xid/:unicode-xid at 4baae9fffb156ba229665b972a9cd5991787ceb7 --- syn/src/macros.rs | 191 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 191 insertions(+) create mode 100644 syn/src/macros.rs (limited to 'syn/src/macros.rs') diff --git a/syn/src/macros.rs b/syn/src/macros.rs new file mode 100644 index 0000000..57091c0 --- /dev/null +++ b/syn/src/macros.rs @@ -0,0 +1,191 @@ +macro_rules! ast_struct { + ( + [$($attrs_pub:tt)*] + struct $name:ident #full $($rest:tt)* + ) => { + #[cfg(feature = "full")] + #[cfg_attr(feature = "extra-traits", derive(Debug, Eq, PartialEq, Hash))] + #[cfg_attr(feature = "clone-impls", derive(Clone))] + $($attrs_pub)* struct $name $($rest)* + + #[cfg(not(feature = "full"))] + #[cfg_attr(feature = "extra-traits", derive(Debug, Eq, PartialEq, Hash))] + #[cfg_attr(feature = "clone-impls", derive(Clone))] + $($attrs_pub)* struct $name { + _noconstruct: (), + } + + #[cfg(all(not(feature = "full"), feature = "printing"))] + impl ::quote::ToTokens for $name { + fn to_tokens(&self, _: &mut ::proc_macro2::TokenStream) { + unreachable!() + } + } + }; + + ( + [$($attrs_pub:tt)*] + struct $name:ident #manual_extra_traits $($rest:tt)* + ) => { + #[cfg_attr(feature = "extra-traits", derive(Debug))] + #[cfg_attr(feature = "clone-impls", derive(Clone))] + $($attrs_pub)* struct $name $($rest)* + }; + + ( + [$($attrs_pub:tt)*] + struct $name:ident #manual_extra_traits_debug $($rest:tt)* + ) => { + #[cfg_attr(feature = "clone-impls", derive(Clone))] + $($attrs_pub)* struct $name $($rest)* + }; + + ( + [$($attrs_pub:tt)*] + struct $name:ident $($rest:tt)* + ) => { + #[cfg_attr(feature = "extra-traits", derive(Debug, Eq, PartialEq, Hash))] + #[cfg_attr(feature = "clone-impls", derive(Clone))] + $($attrs_pub)* struct $name $($rest)* + }; + + ($($t:tt)*) => { + strip_attrs_pub!(ast_struct!($($t)*)); + }; +} + +macro_rules! ast_enum { + // Drop the `#no_visit` attribute, if present. + ( + [$($attrs_pub:tt)*] + enum $name:ident #no_visit $($rest:tt)* + ) => ( + ast_enum!([$($attrs_pub)*] enum $name $($rest)*); + ); + + ( + [$($attrs_pub:tt)*] + enum $name:ident #manual_extra_traits $($rest:tt)* + ) => ( + #[cfg_attr(feature = "extra-traits", derive(Debug))] + #[cfg_attr(feature = "clone-impls", derive(Clone))] + $($attrs_pub)* enum $name $($rest)* + ); + + ( + [$($attrs_pub:tt)*] + enum $name:ident $($rest:tt)* + ) => ( + #[cfg_attr(feature = "extra-traits", derive(Debug, Eq, PartialEq, Hash))] + #[cfg_attr(feature = "clone-impls", derive(Clone))] + $($attrs_pub)* enum $name $($rest)* + ); + + ($($t:tt)*) => { + strip_attrs_pub!(ast_enum!($($t)*)); + }; +} + +macro_rules! ast_enum_of_structs { + ( + $(#[$enum_attr:meta])* + $pub:ident $enum:ident $name:ident #$tag:ident $body:tt + $($remaining:tt)* + ) => { + ast_enum!($(#[$enum_attr])* $pub $enum $name #$tag $body); + ast_enum_of_structs_impl!($pub $enum $name $body $($remaining)*); + }; + + ( + $(#[$enum_attr:meta])* + $pub:ident $enum:ident $name:ident $body:tt + $($remaining:tt)* + ) => { + ast_enum!($(#[$enum_attr])* $pub $enum $name $body); + ast_enum_of_structs_impl!($pub $enum $name $body $($remaining)*); + }; +} + +macro_rules! ast_enum_of_structs_impl { + ( + $pub:ident $enum:ident $name:ident { + $( + $(#[$variant_attr:meta])* + $variant:ident $( ($member:ident) )*, + )* + } + + $($remaining:tt)* + ) => { + check_keyword_matches!(pub $pub); + check_keyword_matches!(enum $enum); + + $($( + ast_enum_from_struct!($name::$variant, $member); + )*)* + + #[cfg(feature = "printing")] + generate_to_tokens! { + $($remaining)* + () + tokens + $name { $($variant $($member)*,)* } + } + }; +} + +macro_rules! ast_enum_from_struct { + // No From for verbatim variants. + ($name:ident::Verbatim, $member:ident) => {}; + + ($name:ident::$variant:ident, $member:ident) => { + impl From<$member> for $name { + fn from(e: $member) -> $name { + $name::$variant(e) + } + } + }; +} + +#[cfg(feature = "printing")] +macro_rules! generate_to_tokens { + (do_not_generate_to_tokens $($foo:tt)*) => (); + + (($($arms:tt)*) $tokens:ident $name:ident { $variant:ident, $($next:tt)*}) => { + generate_to_tokens!( + ($($arms)* $name::$variant => {}) + $tokens $name { $($next)* } + ); + }; + + (($($arms:tt)*) $tokens:ident $name:ident { $variant:ident $member:ident, $($next:tt)*}) => { + generate_to_tokens!( + ($($arms)* $name::$variant(_e) => _e.to_tokens($tokens),) + $tokens $name { $($next)* } + ); + }; + + (($($arms:tt)*) $tokens:ident $name:ident {}) => { + impl ::quote::ToTokens for $name { + fn to_tokens(&self, $tokens: &mut ::proc_macro2::TokenStream) { + match self { + $($arms)* + } + } + } + }; +} + +macro_rules! strip_attrs_pub { + ($mac:ident!($(#[$m:meta])* $pub:ident $($t:tt)*)) => { + check_keyword_matches!(pub $pub); + + $mac!([$(#[$m])* $pub] $($t)*); + }; +} + +macro_rules! check_keyword_matches { + (struct struct) => {}; + (enum enum) => {}; + (pub pub) => {}; +} -- cgit v1.2.1