mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Make tt lexers duplicatible.

Browse Source
This commit is contained in:
Paul Stansifer 2012-06-07 15:33:59 -07:00
parent 2f8be7dcbb
commit d03c04b6ea
1 changed files with 17 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
src/libsyntax/parse/lexer.rs
View File

@ -4,7 +4,7 @@ import diagnostic;
import ast::{tt_delim,tt_flat};
export reader, string_reader, new_string_reader, is_whitespace;
export tt_reader, new_tt_reader;
export tt_reader, new_tt_reader, dup_tt_reader;
export nextch, is_eof, bump, get_str_from;
export string_reader_as_reader, tt_reader_as_reader;
@ -49,6 +49,22 @@ fn new_tt_reader(span_diagnostic: diagnostic::span_handler,
ret r;
}
pure fn dup_tt_frame(&&f: tt_frame) -> tt_frame {
@{readme: f.readme, mut idx: f.idx,
up: alt f.up {
tt_frame_up(o_f) {
tt_frame_up(option::map(o_f, dup_tt_frame))
}
}
}
}
pure fn dup_tt_reader(&&r: tt_reader) -> tt_reader {
@{span_diagnostic: r.span_diagnostic, interner: r.interner,
mut cur: dup_tt_frame(r.cur),
mut cur_tok: r.cur_tok, mut cur_chpos: r.cur_chpos}
}
type string_reader = @{
span_diagnostic: diagnostic::span_handler,
src: @str,