From dc7d7d2698139d9d9b0887481c4f50773daa392b Mon Sep 17 00:00:00 2001 From: Daniel Micay Date: Tue, 8 Apr 2014 18:08:08 -0400 Subject: add support for quadruple precision floating point This currently requires linking against a library like libquadmath (or libgcc), because compiler-rt barely has any support for this and most hardware does not yet have 128-bit precision floating point. For this reason, it's currently hidden behind a feature gate. When compiler-rt is updated to trunk, some tests can be added for constant evaluation since there will be support for the comparison operators. Closes #13381 --- src/libsyntax/parse/lexer.rs | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'src/libsyntax/parse') diff --git a/src/libsyntax/parse/lexer.rs b/src/libsyntax/parse/lexer.rs index ff087d95e50..992d289b4e9 100644 --- a/src/libsyntax/parse/lexer.rs +++ b/src/libsyntax/parse/lexer.rs @@ -593,10 +593,15 @@ fn scan_number(c: char, rdr: &mut StringReader) -> token::Token { /* FIXME (#2252): if this is out of range for either a 32-bit or 64-bit float, it won't be noticed till the back-end. */ - } else { - fatal_span(rdr, start_bpos, rdr.last_pos, - "expected `f32` or `f64` suffix".to_owned()); + } else if c == '1' && n == '2' && nextnextch(rdr).unwrap_or('\x00') == '8' { + bump(rdr); + bump(rdr); + bump(rdr); + check_float_base(rdr, start_bpos, rdr.last_pos, base); + return token::LIT_FLOAT(str_to_ident(num_str.as_slice()), ast::TyF128); } + fatal_span(rdr, start_bpos, rdr.last_pos, + "expected `f32`, `f64` or `f128` suffix".to_owned()); } if is_float { check_float_base(rdr, start_bpos, rdr.last_pos, base); -- cgit 1.4.1-3-g733a5