From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- compiler/rustc_macros/src/lib.rs | 180 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 180 insertions(+) create mode 100644 compiler/rustc_macros/src/lib.rs (limited to 'compiler/rustc_macros/src/lib.rs') diff --git a/compiler/rustc_macros/src/lib.rs b/compiler/rustc_macros/src/lib.rs new file mode 100644 index 000000000..ab509b26f --- /dev/null +++ b/compiler/rustc_macros/src/lib.rs @@ -0,0 +1,180 @@ +#![feature(allow_internal_unstable)] +#![feature(let_else)] +#![feature(never_type)] +#![feature(proc_macro_diagnostic)] +#![feature(proc_macro_span)] +#![allow(rustc::default_hash_types)] +#![recursion_limit = "128"] + +use synstructure::decl_derive; + +use proc_macro::TokenStream; + +mod diagnostics; +mod hash_stable; +mod lift; +mod newtype; +mod query; +mod serialize; +mod symbols; +mod type_foldable; +mod type_visitable; + +#[proc_macro] +pub fn rustc_queries(input: TokenStream) -> TokenStream { + query::rustc_queries(input) +} + +#[proc_macro] +pub fn symbols(input: TokenStream) -> TokenStream { + symbols::symbols(input.into()).into() +} + +/// Creates a struct type `S` that can be used as an index with +/// `IndexVec` and so on. +/// +/// There are two ways of interacting with these indices: +/// +/// - The `From` impls are the preferred way. So you can do +/// `S::from(v)` with a `usize` or `u32`. And you can convert back +/// to an integer with `u32::from(s)`. +/// +/// - Alternatively, you can use the methods `S::new(v)` and `s.index()` +/// to create/return a value. +/// +/// Internally, the index uses a u32, so the index must not exceed +/// `u32::MAX`. You can also customize things like the `Debug` impl, +/// what traits are derived, and so forth via the macro. +#[proc_macro] +#[allow_internal_unstable(step_trait, rustc_attrs, trusted_step)] +pub fn newtype_index(input: TokenStream) -> TokenStream { + newtype::newtype(input) +} + +/// Implements the `fluent_messages` macro, which performs compile-time validation of the +/// compiler's Fluent resources (i.e. that the resources parse and don't multiply define the same +/// messages) and generates constants that make using those messages in diagnostics more ergonomic. +/// +/// For example, given the following invocation of the macro.. +/// +/// ```ignore (rust) +/// fluent_messages! { +/// typeck => "./typeck.ftl", +/// } +/// ``` +/// ..where `typeck.ftl` has the following contents.. +/// +/// ```fluent +/// typeck-field-multiply-specified-in-initializer = +/// field `{$ident}` specified more than once +/// .label = used more than once +/// .label-previous-use = first use of `{$ident}` +/// ``` +/// ...then the macro parse the Fluent resource, emitting a diagnostic if it fails to do so, and +/// will generate the following code: +/// +/// ```ignore (rust) +/// pub static DEFAULT_LOCALE_RESOURCES: &'static [&'static str] = &[ +/// include_str!("./typeck.ftl"), +/// ]; +/// +/// mod fluent_generated { +/// mod typeck { +/// pub const field_multiply_specified_in_initializer: DiagnosticMessage = +/// DiagnosticMessage::fluent("typeck-field-multiply-specified-in-initializer"); +/// pub const field_multiply_specified_in_initializer_label_previous_use: DiagnosticMessage = +/// DiagnosticMessage::fluent_attr( +/// "typeck-field-multiply-specified-in-initializer", +/// "previous-use-label" +/// ); +/// } +/// } +/// ``` +/// When emitting a diagnostic, the generated constants can be used as follows: +/// +/// ```ignore (rust) +/// let mut err = sess.struct_span_err( +/// span, +/// fluent::typeck::field_multiply_specified_in_initializer +/// ); +/// err.span_default_label(span); +/// err.span_label( +/// previous_use_span, +/// fluent::typeck::field_multiply_specified_in_initializer_label_previous_use +/// ); +/// err.emit(); +/// ``` +#[proc_macro] +pub fn fluent_messages(input: TokenStream) -> TokenStream { + diagnostics::fluent_messages(input) +} + +decl_derive!([HashStable, attributes(stable_hasher)] => hash_stable::hash_stable_derive); +decl_derive!( + [HashStable_Generic, attributes(stable_hasher)] => + hash_stable::hash_stable_generic_derive +); + +decl_derive!([Decodable] => serialize::decodable_derive); +decl_derive!([Encodable] => serialize::encodable_derive); +decl_derive!([TyDecodable] => serialize::type_decodable_derive); +decl_derive!([TyEncodable] => serialize::type_encodable_derive); +decl_derive!([MetadataDecodable] => serialize::meta_decodable_derive); +decl_derive!([MetadataEncodable] => serialize::meta_encodable_derive); +decl_derive!([TypeFoldable, attributes(type_foldable)] => type_foldable::type_foldable_derive); +decl_derive!([TypeVisitable, attributes(type_visitable)] => type_visitable::type_visitable_derive); +decl_derive!([Lift, attributes(lift)] => lift::lift_derive); +decl_derive!( + [SessionDiagnostic, attributes( + // struct attributes + warning, + error, + lint, + help, + note, + warn_, + // field attributes + skip_arg, + primary_span, + label, + subdiagnostic, + suggestion, + suggestion_short, + suggestion_hidden, + suggestion_verbose)] => diagnostics::session_diagnostic_derive +); +decl_derive!( + [LintDiagnostic, attributes( + // struct attributes + warning, + error, + lint, + help, + note, + warn_, + // field attributes + skip_arg, + primary_span, + label, + subdiagnostic, + suggestion, + suggestion_short, + suggestion_hidden, + suggestion_verbose)] => diagnostics::lint_diagnostic_derive +); +decl_derive!( + [SessionSubdiagnostic, attributes( + // struct/variant attributes + label, + help, + note, + warn_, + suggestion, + suggestion_short, + suggestion_hidden, + suggestion_verbose, + // field attributes + skip_arg, + primary_span, + applicability)] => diagnostics::session_subdiagnostic_derive +); -- cgit v1.2.3