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rustc:🔙🔗 redo symbol mangling

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Handle more characters that appear in types, most notably <>): were
missing. Also the new scheme takes care that no two different input
strings result in the same mangled string, which was not the case before.

Fixes #6921
This commit is contained in:
Philipp Brüschweiler 2013-06-05 21:40:49 +02:00
parent de3000af8f
commit eb62781720
1 changed files with 25 additions and 14 deletions
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39
src/librustc/back/link.rs
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@ -633,26 +633,37 @@ pub fn get_symbol_hash(ccx: @CrateContext, t: ty::t) -> @str {
// Name sanitation. LLVM will happily accept identifiers with weird names, but
// gas doesn't!
// gas accepts the following characters in symbols: a-z, A-Z, 0-9, ., _, $
pub fn sanitize(s: &str) -> ~str {
let mut result = ~"";
for str::each_char(s) |c| {
match c {
'@' => result += "_sbox_",
'~' => result += "_ubox_",
'*' => result += "_ptr_",
'&' => result += "_ref_",
',' => result += "_",
// Escape these with $ sequences
'@' => result += "$SP$",
'~' => result += "$UP$",
'*' => result += "$RP$",
'&' => result += "$BP$",
'<' => result += "$LT$",
'>' => result += "$GT$",
'(' => result += "$LP$",
')' => result += "$RP$",
',' => result += "$C$",
'{' | '(' => result += "_of_",
'a' .. 'z'
| 'A' .. 'Z'
| '0' .. '9'
| '_' => result.push_char(c),
_ => {
if c > 'z' && char::is_XID_continue(c) {
result.push_char(c);
// '.' doesn't occur in types and functions, so reuse it
// for ':'
':' => result.push_char('.'),
// These are legal symbols
'a' .. 'z'
| 'A' .. 'Z'
| '0' .. '9'
| '_' => result.push_char(c),
_ => {
if c > 'z' && char::is_XID_continue(c) {
result.push_char(c);
}
}
}
}
}