mirror of
https://github.com/golang/go
synced 2024-11-11 21:50:21 -07:00
1a111ea2c7
Also: - better error messages in some cases - factored out function to produce syntax error at given line number Fixes #13273. Change-Id: I0192a94731cc23444680a26bd0656ef663e6da0b Reviewed-on: https://go-review.googlesource.com/16992 Reviewed-by: Chris Manghane <cmang@golang.org>
56 lines
1.7 KiB
Go
56 lines
1.7 KiB
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.
|
|
|
|
// Check that we correctly construct (and report errors)
|
|
// for unary expressions of the form <-x where we only
|
|
// know after parsing x whether <-x is a receive operation
|
|
// or a channel type.
|
|
|
|
package n
|
|
|
|
func f() {
|
|
// test case from issue 13273
|
|
<-chan int((chan int)(nil))
|
|
|
|
<-chan int(nil)
|
|
<-chan chan int(nil)
|
|
<-chan chan chan int(nil)
|
|
<-chan chan chan chan int(nil)
|
|
<-chan chan chan chan chan int(nil)
|
|
|
|
<-chan<-chan int(nil)
|
|
<-chan<-chan<-chan int(nil)
|
|
<-chan<-chan<-chan<-chan int(nil)
|
|
<-chan<-chan<-chan<-chan<-chan int(nil)
|
|
|
|
<-chan (<-chan int)(nil)
|
|
<-chan (<-chan (<-chan int))(nil)
|
|
<-chan (<-chan (<-chan (<-chan int)))(nil)
|
|
<-chan (<-chan (<-chan (<-chan (<-chan int))))(nil)
|
|
|
|
<-(<-chan int)(nil)
|
|
<-(<-chan chan int)(nil)
|
|
<-(<-chan chan chan int)(nil)
|
|
<-(<-chan chan chan chan int)(nil)
|
|
<-(<-chan chan chan chan chan int)(nil)
|
|
|
|
<-(<-chan<-chan int)(nil)
|
|
<-(<-chan<-chan<-chan int)(nil)
|
|
<-(<-chan<-chan<-chan<-chan int)(nil)
|
|
<-(<-chan<-chan<-chan<-chan<-chan int)(nil)
|
|
|
|
<-(<-chan (<-chan int))(nil)
|
|
<-(<-chan (<-chan (<-chan int)))(nil)
|
|
<-(<-chan (<-chan (<-chan (<-chan int))))(nil)
|
|
<-(<-chan (<-chan (<-chan (<-chan (<-chan int)))))(nil)
|
|
|
|
type _ <-<-chan int // ERROR "unexpected <-, expecting chan"
|
|
<-<-chan int // ERROR "unexpected <-, expecting chan|expecting {" (new parser: same error as for type decl)
|
|
|
|
type _ <-chan<-int // ERROR "unexpected int, expecting chan|expecting chan"
|
|
<-chan<-int // ERROR "unexpected int, expecting chan|expecting {" (new parser: same error as for type decl)
|
|
}
|