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added test case for tokenization of macro_rules

This commit is contained in:
John Clements 2013-09-24 15:57:58 -07:00
parent 0322832763
commit 0269850cc2
1 changed files with 45 additions and 0 deletions
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45
src/libsyntax/parse/mod.rs
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@ -388,6 +388,51 @@ mod test {
string_to_expr(@"::abc::def::return");
}
// check the token-tree-ization of macros
#[test] fn string_to_tts_macro () {
let tts = string_to_tts(@"macro_rules! zip (($a)=>($a))");
match tts {
[ast::tt_tok(_,_),
ast::tt_tok(_,token::NOT),
ast::tt_tok(_,_),
ast::tt_delim(delim_elts)] =>
match *delim_elts {
[ast::tt_tok(_,token::LPAREN),
ast::tt_delim(first_set),
ast::tt_tok(_,token::FAT_ARROW),
ast::tt_delim(second_set),
ast::tt_tok(_,token::RPAREN)] =>
match *first_set {
[ast::tt_tok(_,token::LPAREN),
ast::tt_tok(_,token::DOLLAR),
ast::tt_tok(_,_),
ast::tt_tok(_,token::RPAREN)] =>
match *second_set {
[ast::tt_tok(_,token::LPAREN),
ast::tt_tok(_,token::DOLLAR),
ast::tt_tok(_,_),
ast::tt_tok(_,token::RPAREN)] =>
assert_eq!("correct","correct"),
_ => assert_eq!("wrong 4","correct")
},
_ => {
error!("failing value 3: %?",first_set);
assert_eq!("wrong 3","correct")
}
},
_ => {
error!("failing value 2: %?",delim_elts);
assert_eq!("wrong","correct");
}
},
_ => {
error!("failing value: %?",tts);
assert_eq!("wrong 1","correct");
}
}
}
#[test] fn string_to_tts_1 () {
let tts = string_to_tts(@"fn a (b : int) { b; }");
assert_eq!(to_json_str(@tts),