83 lines
2.9 KiB
Rust
83 lines
2.9 KiB
Rust
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Syntax extensions in the Rust compiler.
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#![crate_name = "syntax_ext"]
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#![crate_type = "dylib"]
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#![crate_type = "rlib"]
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#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
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html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
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html_root_url = "https://doc.rust-lang.org/nightly/")]
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#![feature(rustc_private)]
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#![feature(str_char)]
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extern crate fmt_macros;
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extern crate syntax;
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use syntax::ext::base::{MacroExpanderFn, NormalTT};
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use syntax::ext::base::{SyntaxEnv, SyntaxExtension};
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use syntax::parse::token::intern;
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// A variant of 'try!' that panics on Err(FatalError). This is used as a
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// crutch on the way towards a non-panic!-prone parser. It should be used
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// for fatal parsing errors; eventually we plan to convert all code using
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// panictry to just use normal try
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macro_rules! panictry {
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($e:expr) => ({
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use std::result::Result::{Ok, Err};
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use syntax::diagnostic::FatalError;
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match $e {
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Ok(e) => e,
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Err(FatalError) => panic!(FatalError)
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}
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})
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}
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mod asm;
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mod cfg;
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mod concat;
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mod concat_idents;
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mod deriving;
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mod env;
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mod format;
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mod log_syntax;
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mod trace_macros;
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pub fn register_builtins(env: &mut SyntaxEnv) {
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// utility function to simplify creating NormalTT syntax extensions
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fn builtin_normal_expander(f: MacroExpanderFn) -> SyntaxExtension {
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NormalTT(Box::new(f), None, false)
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}
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env.insert(intern("asm"),
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builtin_normal_expander(asm::expand_asm));
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env.insert(intern("cfg"),
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builtin_normal_expander(cfg::expand_cfg));
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env.insert(intern("concat"),
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builtin_normal_expander(concat::expand_syntax_ext));
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env.insert(intern("concat_idents"),
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builtin_normal_expander(concat_idents::expand_syntax_ext));
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env.insert(intern("env"),
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builtin_normal_expander(env::expand_env));
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env.insert(intern("option_env"),
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builtin_normal_expander(env::expand_option_env));
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env.insert(intern("format_args"),
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// format_args uses `unstable` things internally.
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NormalTT(Box::new(format::expand_format_args), None, true));
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env.insert(intern("log_syntax"),
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builtin_normal_expander(log_syntax::expand_syntax_ext));
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env.insert(intern("trace_macros"),
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builtin_normal_expander(trace_macros::expand_trace_macros));
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deriving::register_all(env);
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}
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