1 //! Syntax extensions in the Rust compiler.
3 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
5 #![deny(rust_2018_idioms)]
7 #![feature(in_band_lifetimes)]
8 #![feature(proc_macro_diagnostic)]
9 #![feature(proc_macro_internals)]
10 #![feature(proc_macro_span)]
11 #![feature(decl_macro)]
13 #![feature(rustc_diagnostic_macros)]
15 #![recursion_limit="256"]
17 extern crate proc_macro;
19 use rustc_errors as errors;
34 mod proc_macro_server;
40 pub mod proc_macro_decls;
41 pub mod proc_macro_impl;
43 use rustc_data_structures::sync::Lrc;
45 use syntax::ext::base::{MacroExpanderFn, NormalTT, NamedSyntaxExtension, MultiModifier};
46 use syntax::ext::hygiene;
47 use syntax::symbol::Symbol;
49 pub fn register_builtins(resolver: &mut dyn syntax::ext::base::Resolver,
50 user_exts: Vec<NamedSyntaxExtension>) {
51 deriving::register_builtin_derives(resolver);
53 let mut register = |name, ext| {
54 resolver.add_builtin(ast::Ident::with_empty_ctxt(name), Lrc::new(ext));
57 macro_rules! register {
58 ($( $name:ident: $f:expr, )*) => { $(
59 register(Symbol::intern(stringify!($name)),
61 expander: Box::new($f as MacroExpanderFn),
63 allow_internal_unstable: None,
64 allow_internal_unsafe: false,
65 local_inner_macros: false,
66 unstable_feature: None,
67 edition: hygiene::default_edition(),
72 use syntax::ext::source_util::*;
75 __rust_unstable_column: expand_column_gated,
76 column: expand_column,
78 stringify: expand_stringify,
79 include: expand_include,
80 include_str: expand_include_str,
81 include_bytes: expand_include_bytes,
82 module_path: expand_mod,
85 global_asm: global_asm::expand_global_asm,
87 concat: concat::expand_syntax_ext,
88 concat_idents: concat_idents::expand_syntax_ext,
90 option_env: env::expand_option_env,
91 log_syntax: log_syntax::expand_syntax_ext,
92 trace_macros: trace_macros::expand_trace_macros,
93 compile_error: compile_error::expand_compile_error,
94 assert: assert::expand_assert,
97 register(Symbol::intern("test_case"), MultiModifier(Box::new(test_case::expand)));
98 register(Symbol::intern("test"), MultiModifier(Box::new(test::expand_test)));
99 register(Symbol::intern("bench"), MultiModifier(Box::new(test::expand_bench)));
101 // format_args uses `unstable` things internally.
102 register(Symbol::intern("format_args"),
104 expander: Box::new(format::expand_format_args),
106 allow_internal_unstable: Some(vec![
107 Symbol::intern("fmt_internals"),
109 allow_internal_unsafe: false,
110 local_inner_macros: false,
111 unstable_feature: None,
112 edition: hygiene::default_edition(),
114 register(Symbol::intern("format_args_nl"),
116 expander: Box::new(format::expand_format_args_nl),
118 allow_internal_unstable: Some(vec![
119 Symbol::intern("fmt_internals"),
121 allow_internal_unsafe: false,
122 local_inner_macros: false,
123 unstable_feature: None,
124 edition: hygiene::default_edition(),
127 for (name, ext) in user_exts {