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Add a b'x' byte literal of type u8.

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This commit is contained in:
Simon Sapin
2014-06-06 16:04:04 +01:00
parent 2fd618e77a
commit bccdba0296
16 changed files with 169 additions and 5 deletions
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11
src/libsyntax/parse/token.rs
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@@ -78,6 +78,7 @@ pub enum Token {
DOLLAR,
/* Literals */
LIT_BYTE(u8),
LIT_CHAR(char),
LIT_INT(i64, ast::IntTy),
LIT_UINT(u64, ast::UintTy),
@@ -193,6 +194,14 @@ pub fn to_str(t: &Token) -> String {
DOLLAR => "$".to_string(),
/* Literals */
LIT_BYTE(b) => {
let mut res = String::from_str("b'");
(b as char).escape_default(|c| {
res.push_char(c);
});
res.push_char('\'');
res
}
LIT_CHAR(c) => {
let mut res = String::from_str("'");
c.escape_default(|c| {
@@ -273,6 +282,7 @@ pub fn can_begin_expr(t: &Token) -> bool {
IDENT(_, _) => true,
UNDERSCORE => true,
TILDE => true,
LIT_BYTE(_) => true,
LIT_CHAR(_) => true,
LIT_INT(_, _) => true,
LIT_UINT(_, _) => true,
@@ -311,6 +321,7 @@ pub fn close_delimiter_for(t: &Token) -> Option<Token> {
pub fn is_lit(t: &Token) -> bool {
match *t {
LIT_BYTE(_) => true,
LIT_CHAR(_) => true,
LIT_INT(_, _) => true,
LIT_UINT(_, _) => true,