mirror of
https://github.com/golang/go
synced 2024-11-24 22:10:02 -07:00
539aa05a64
Always reading runes (rather than bytes) has negligible overhead (a simple if at the moment - it can be eliminated eventually) but simplifies the lexer logic and opens up the door for speedups. In the process remove many int conversions that are now not needed anymore. Also, because identifiers are now more easily recognized, remove talph label and move identifier lexing "in place". Also, instead of accepting all chars < 0x80 and then check for "frogs", only permit valid characters in the first place. Removes an extra call for common simple tokens and leads to simpler logic. `time go build -a net/http` (best of 5 runs) seems 1% faster. Assuming this is in the noise, there is no noticeable performance degradation with this change. Change-Id: I3454c9bf8b91808188cf7a5f559341749da9a1eb Reviewed-on: https://go-review.googlesource.com/19847 Reviewed-by: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
18 lines
448 B
Go
18 lines
448 B
Go
// errorcheck
|
|
|
|
// Copyright 2015 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Test an internal compiler error on ? symbol in declaration
|
|
// following an empty import.
|
|
|
|
package a
|
|
import"" // ERROR "import path is empty"
|
|
var? // ERROR "illegal character U\+003F '\?'"
|
|
|
|
var x int // ERROR "unexpected var" "cannot declare name"
|
|
|
|
func main() {
|
|
}
|