rust-lang/rust — pull request #17625 by Boddlnagg (2014-09-29 10:56:42+00:00)
Title: Update ANTLR float suffix grammar

- Removes `f128` from the grammar, which is no longer support in rustc
- The `fragment` modifier is added so it won't parse float suffix as a separate token (this fixes an issue in [VisualRust](https://github.com/PistonDevelopers/VisualRust), where the ANTLR lexer is used for syntax highlighting)