152 lines
3.8 KiB
Rust
152 lines
3.8 KiB
Rust
#[cfg_attr(
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not(any(feature = "full", feature = "derive")),
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allow(unknown_lints, unused_macro_rules)
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)]
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macro_rules! ast_struct {
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(
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$(#[$attr:meta])*
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$pub:ident $struct:ident $name:ident #full $body:tt
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) => {
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check_keyword_matches!(pub $pub);
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check_keyword_matches!(struct $struct);
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#[cfg(feature = "full")]
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$(#[$attr])* $pub $struct $name $body
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#[cfg(not(feature = "full"))]
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$(#[$attr])* $pub $struct $name {
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_noconstruct: ::core::marker::PhantomData<::proc_macro2::Span>,
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}
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#[cfg(all(not(feature = "full"), feature = "printing"))]
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impl ::quote::ToTokens for $name {
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fn to_tokens(&self, _: &mut ::proc_macro2::TokenStream) {
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unreachable!()
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}
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}
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};
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(
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$(#[$attr:meta])*
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$pub:ident $struct:ident $name:ident $body:tt
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) => {
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check_keyword_matches!(pub $pub);
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check_keyword_matches!(struct $struct);
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$(#[$attr])* $pub $struct $name $body
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};
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}
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#[cfg(any(feature = "full", feature = "derive"))]
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macro_rules! ast_enum {
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(
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$(#[$enum_attr:meta])*
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$pub:ident $enum:ident $name:ident $body:tt
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) => {
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check_keyword_matches!(pub $pub);
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check_keyword_matches!(enum $enum);
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$(#[$enum_attr])* $pub $enum $name $body
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};
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}
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macro_rules! ast_enum_of_structs {
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(
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$(#[$enum_attr:meta])*
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$pub:ident $enum:ident $name:ident $body:tt
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) => {
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check_keyword_matches!(pub $pub);
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check_keyword_matches!(enum $enum);
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$(#[$enum_attr])* $pub $enum $name $body
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#[cfg(feature = "printing")]
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generate_to_tokens!(() tokens $name $body);
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};
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}
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#[cfg(feature = "printing")]
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macro_rules! generate_to_tokens {
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(
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($($arms:tt)*) $tokens:ident $name:ident {
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$(#[doc $($doc_attr:tt)*])*
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$(#[cfg_attr $cfg_attr:tt])*
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$variant:ident,
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$($next:tt)*
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}
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) => {
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generate_to_tokens!(
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($($arms)* $name::$variant => {})
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$tokens $name { $($next)* }
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);
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};
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(
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($($arms:tt)*) $tokens:ident $name:ident {
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$(#[doc $($doc_attr:tt)*])*
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$(#[cfg_attr $cfg_attr:tt])*
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$variant:ident($member:ident),
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$($next:tt)*
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}
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) => {
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generate_to_tokens!(
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($($arms)* $name::$variant(_e) => _e.to_tokens($tokens),)
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$tokens $name { $($next)* }
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);
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};
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(($($arms:tt)*) $tokens:ident $name:ident {}) => {
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#[cfg_attr(docsrs, doc(cfg(feature = "printing")))]
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impl ::quote::ToTokens for $name {
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fn to_tokens(&self, $tokens: &mut ::proc_macro2::TokenStream) {
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match self {
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$($arms)*
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}
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}
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}
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};
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}
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// Rustdoc bug: does not respect the doc(hidden) on some items.
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#[cfg(all(doc, feature = "parsing"))]
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macro_rules! pub_if_not_doc {
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($(#[$m:meta])* $pub:ident $($item:tt)*) => {
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check_keyword_matches!(pub $pub);
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$(#[$m])*
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$pub(crate) $($item)*
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};
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}
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#[cfg(all(not(doc), feature = "parsing"))]
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macro_rules! pub_if_not_doc {
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($(#[$m:meta])* $pub:ident $($item:tt)*) => {
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check_keyword_matches!(pub $pub);
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$(#[$m])*
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$pub $($item)*
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};
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}
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macro_rules! check_keyword_matches {
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(enum enum) => {};
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(pub pub) => {};
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(struct struct) => {};
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}
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#[cfg(any(feature = "full", feature = "derive"))]
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macro_rules! return_impl_trait {
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(
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$(#[$attr:meta])*
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$vis:vis fn $name:ident $args:tt -> $impl_trait:ty [$concrete:ty] $body:block
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) => {
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#[cfg(not(docsrs))]
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$(#[$attr])*
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$vis fn $name $args -> $concrete $body
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#[cfg(docsrs)]
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$(#[$attr])*
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$vis fn $name $args -> $impl_trait $body
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};
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}
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