src/libsyntax_ext/lib.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 //! Syntax extensions in the Rust compiler.
  12
  13 #![crate_name = "syntax_ext"]
  14 #![crate_type = "dylib"]
  15 #![crate_type = "rlib"]
  16 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
  17        html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
  18        html_root_url = "https://doc.rust-lang.org/nightly/")]
  19 #![deny(warnings)]
  20
  21 #![feature(proc_macro_internals)]
  22
  23 extern crate fmt_macros;
  24 extern crate log;
  25 #[macro_use]
  26 extern crate syntax;
  27 extern crate syntax_pos;
  28 extern crate proc_macro;
  29 extern crate rustc_errors as errors;
  30
  31 mod asm;
  32 mod cfg;
  33 mod compile_error;
  34 mod concat;
  35 mod concat_idents;
  36 mod env;
  37 mod format;
  38 mod format_foreign;
  39 mod global_asm;
  40 mod log_syntax;
  41 mod trace_macros;
  42
  43 pub mod proc_macro_registrar;
  44
  45 // for custom_derive
  46 pub mod deriving;
  47
  48 pub mod proc_macro_impl;
  49
  50 use std::rc::Rc;
  51 use syntax::ast;
  52 use syntax::ext::base::{MacroExpanderFn, NormalTT, NamedSyntaxExtension};
  53 use syntax::symbol::Symbol;
  54
  55 pub fn register_builtins(resolver: &mut syntax::ext::base::Resolver,
  56                          user_exts: Vec<NamedSyntaxExtension>,
  57                          enable_quotes: bool) {
  58     deriving::register_builtin_derives(resolver);
  59
  60     let mut register = |name, ext| {
  61         resolver.add_builtin(ast::Ident::with_empty_ctxt(name), Rc::new(ext));
  62     };
  63
  64     macro_rules! register {
  65         ($( $name:ident: $f:expr, )*) => { $(
  66             register(Symbol::intern(stringify!($name)),
  67                      NormalTT {
  68                         expander: Box::new($f as MacroExpanderFn),
  69                         def_info: None,
  70                         allow_internal_unstable: false,
  71                         allow_internal_unsafe: false,
  72                     });
  73         )* }
  74     }
  75
  76     if enable_quotes {
  77         use syntax::ext::quote::*;
  78         register! {
  79             quote_tokens: expand_quote_tokens,
  80             quote_expr: expand_quote_expr,
  81             quote_ty: expand_quote_ty,
  82             quote_item: expand_quote_item,
  83             quote_pat: expand_quote_pat,
  84             quote_arm: expand_quote_arm,
  85             quote_stmt: expand_quote_stmt,
  86             quote_attr: expand_quote_attr,
  87             quote_arg: expand_quote_arg,
  88             quote_block: expand_quote_block,
  89             quote_meta_item: expand_quote_meta_item,
  90             quote_path: expand_quote_path,
  91         }
  92     }
  93
  94     use syntax::ext::source_util::*;
  95     register! {
  96         line: expand_line,
  97         __rust_unstable_column: expand_column_gated,
  98         column: expand_column,
  99         file: expand_file,
 100         stringify: expand_stringify,
 101         include: expand_include,
 102         include_str: expand_include_str,
 103         include_bytes: expand_include_bytes,
 104         module_path: expand_mod,
 105
 106         asm: asm::expand_asm,
 107         global_asm: global_asm::expand_global_asm,
 108         cfg: cfg::expand_cfg,
 109         concat: concat::expand_syntax_ext,
 110         concat_idents: concat_idents::expand_syntax_ext,
 111         env: env::expand_env,
 112         option_env: env::expand_option_env,
 113         log_syntax: log_syntax::expand_syntax_ext,
 114         trace_macros: trace_macros::expand_trace_macros,
 115         compile_error: compile_error::expand_compile_error,
 116     }
 117
 118     // format_args uses `unstable` things internally.
 119     register(Symbol::intern("format_args"),
 120              NormalTT {
 121                 expander: Box::new(format::expand_format_args),
 122                 def_info: None,
 123                 allow_internal_unstable: true,
 124                 allow_internal_unsafe: false,
 125             });
 126
 127     for (name, ext) in user_exts {
 128         register(name, ext);
 129     }
 130 }