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Output meaningful lexer error when no digits given for number

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Closes #1802
This commit is contained in:
Marijn Haverbeke 2012-02-10 09:50:16 +01:00
parent d493438c98
commit a681628bd4
1 changed files with 6 additions and 0 deletions
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6
src/comp/syntax/parse/lexer.rs
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@ -220,6 +220,9 @@ fn scan_number(c: char, rdr: reader) -> token::token {
tp = if signed { either::left(ast::ty_i64) }
else { either::right(ast::ty_u64) };
}
if str::byte_len(num_str) == 0u {
rdr.fatal("no valid digits found for number");
}
let parsed = u64::from_str(num_str, base as u64);
alt tp {
either::left(t) { ret token::LIT_INT(parsed as i64, t); }
@ -264,6 +267,9 @@ fn scan_number(c: char, rdr: reader) -> token::token {
ret token::LIT_FLOAT(interner::intern(*rdr.interner, num_str),
ast::ty_f);
} else {
if str::byte_len(num_str) == 0u {
rdr.fatal("no valid digits found for number");
}
let parsed = u64::from_str(num_str, base as u64);
ret token::LIT_INT(parsed as i64, ast::ty_i);
}