rust/src/libsyntax_ext/log_syntax.rs

use syntax::ext::base;
use syntax::print;
use syntax::tokenstream;
use syntax_pos;

pub fn expand_syntax_ext<'cx>(_cx: &'cx mut base::ExtCtxt<'_>,
                              sp: syntax_pos::Span,
                              tts: &[tokenstream::TokenTree])
                              -> Box<dyn base::MacResult + 'cx> {
    println!("{}", print::pprust::tts_to_string(tts));

    // any so that `log_syntax` can be invoked as an expression and item.
    base::DummyResult::any_valid(sp)
}
Move built-in syntax extensions to a separate crate 2015-12-10 14:23:14 +00:00			`use syntax::ext::base;`
			`use syntax::print;`
Refactored tokentrees into their own files in preparation for tokenstreams. Modified tests to point to the new file now. 2016-06-20 15:49:33 +00:00			`use syntax::tokenstream;`
Move errors from libsyntax to its own crate 2016-06-21 22:08:13 +00:00			`use syntax_pos;`
librustc: Terminate name searches at the nearest module scope for paths that contain at least two components. r=graydon 2012-12-23 22:41:37 +00:00
syntax: Migrate built-in macros to the regular stability checking 2019-06-22 13:18:05 +00:00			`pub fn expand_syntax_ext<'cx>(_cx: &'cx mut base::ExtCtxt<'_>,`
Move errors from libsyntax to its own crate 2016-06-21 22:08:13 +00:00			`sp: syntax_pos::Span,`
Refactored tokentrees into their own files in preparation for tokenstreams. Modified tests to point to the new file now. 2016-06-20 15:49:33 +00:00			`tts: &[tokenstream::TokenTree])`
Deny bare trait objects in src/libsyntax_ext 2018-07-12 09:58:16 +00:00			`-> Box<dyn base::MacResult + 'cx> {`
Add Span and separate open/close delims to TTDelim This came up when working [on the gl-rs generator extension](https://github.com/bjz/gl-rs/blob/990383de801bd2e233159d5be07c9b5622827620/src/gl_generator/lib.rs#L135-L146). The new definition of `TTDelim` adds an associated `Span` that covers the whole token tree and enforces the invariant that a delimited sequence of token trees must have an opening and closing delimiter. A `get_span` method has also been added to `TokenTree` type to make it easier to implement better error messages for syntax extensions. 2014-10-22 05:37:20 +00:00			`println!("{}", print::pprust::tts_to_string(tts));`
Add a syntax extension to log syntax, for debugging macros. 2011-08-08 21:17:33 +00:00
syntax: allow `trace_macros!` and `log_syntax!` in item position. Previously trace_macros!(true) fn main() {} would complain about `trace_macros` being an expression macro in item position. This is a pointless limitation, because the macro is purely compile-time, with no runtime effect. (And similarly for log_syntax.) This also changes the behaviour of `trace_macros!` very slightly, it used to be equivalent to macro_rules! trace_macros { (true $($_x: tt)) => { true }; (false $($_x: tt)) => { false } } I.e. you could invoke it with arbitrary trailing arguments, which were ignored. It is changed to accept only exactly `true` or `false` (with no trailing arguments) and expands to `()`. 2014-03-18 12:14:08 +00:00			// any so that `log_syntax` can be invoked as an expression and item.
Fix `trace_macros` and `log_syntax` 2018-12-20 00:57:48 +00:00			`base::DummyResult::any_valid(sp)`
Port the compiler to the typaram foo<T> syntax. 2011-08-12 14:15:18 +00:00			`}`