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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Syntax extensions in the Rust compiler.
#![crate_name = "syntax_ext"]
#![unstable(feature = "rustc_private", issue = "27812")]
#![crate_type = "dylib"]
#![crate_type = "rlib"]
#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
html_root_url = "https://doc.rust-lang.org/nightly/")]
#![cfg_attr(not(stage0), deny(warnings))]
#![feature(dotdot_in_tuple_patterns)]
#![feature(proc_macro_lib)]
#![feature(proc_macro_internals)]
#![feature(rustc_private)]
#![feature(staged_api)]
extern crate fmt_macros;
#[macro_use]
extern crate log;
#[macro_use]
extern crate syntax;
extern crate syntax_pos;
extern crate proc_macro;
extern crate rustc_errors as errors;
mod asm;
mod cfg;
mod concat;
mod concat_idents;
mod env;
mod format;
mod log_syntax;
mod trace_macros;
pub mod proc_macro_registrar;
// for custom_derive
pub mod deriving;
use std::rc::Rc;
use syntax::ast;
use syntax::ext::base::{MacroExpanderFn, NormalTT, IdentTT, MultiModifier, NamedSyntaxExtension};
use syntax::ext::tt::macro_rules::MacroRulesExpander;
use syntax::parse::token::intern;
pub fn register_builtins(resolver: &mut syntax::ext::base::Resolver,
user_exts: Vec<NamedSyntaxExtension>,
enable_quotes: bool) {
let mut register = |name, ext| {
resolver.add_ext(ast::Ident::with_empty_ctxt(name), Rc::new(ext));
};
register(intern("macro_rules"), IdentTT(Box::new(MacroRulesExpander), None, false));
macro_rules! register {
($( $name:ident: $f:expr, )*) => { $(
register(intern(stringify!($name)),
NormalTT(Box::new($f as MacroExpanderFn), None, false));
)* }
}
if enable_quotes {
use syntax::ext::quote::*;
register! {
quote_tokens: expand_quote_tokens,
quote_expr: expand_quote_expr,
quote_ty: expand_quote_ty,
quote_item: expand_quote_item,
quote_pat: expand_quote_pat,
quote_arm: expand_quote_arm,
quote_stmt: expand_quote_stmt,
quote_matcher: expand_quote_matcher,
quote_attr: expand_quote_attr,
quote_arg: expand_quote_arg,
quote_block: expand_quote_block,
quote_meta_item: expand_quote_meta_item,
quote_path: expand_quote_path,
}
}
use syntax::ext::source_util::*;
register! {
line: expand_line,
column: expand_column,
file: expand_file,
stringify: expand_stringify,
include: expand_include,
include_str: expand_include_str,
include_bytes: expand_include_bytes,
module_path: expand_mod,
asm: asm::expand_asm,
cfg: cfg::expand_cfg,
concat: concat::expand_syntax_ext,
concat_idents: concat_idents::expand_syntax_ext,
env: env::expand_env,
option_env: env::expand_option_env,
log_syntax: log_syntax::expand_syntax_ext,
trace_macros: trace_macros::expand_trace_macros,
}
// format_args uses `unstable` things internally.
register(intern("format_args"), NormalTT(Box::new(format::expand_format_args), None, true));
register(intern("derive"), MultiModifier(Box::new(deriving::expand_derive)));
for (name, ext) in user_exts {
register(name, ext);
}
}
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