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https://github.com/golang/go
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7997e5f254
This is close to what the compiler used to say, except now we say "as T value" rather than "as type T" which is closer to the truth (we cannot use a value as a type, after all). Also, place the primary error and the explanation (cause) on a single line. Make respective (single line) adjustment to the matching "cannot convert" error. Adjust various tests. For #55326. Change-Id: Ib646cf906b11f4129b7ed0c38cf16471f9266b88 Reviewed-on: https://go-review.googlesource.com/c/go/+/436176 Reviewed-by: Robert Griesemer <gri@google.com> Run-TryBot: Robert Griesemer <gri@google.com> Auto-Submit: Robert Griesemer <gri@google.com> Reviewed-by: Robert Findley <rfindley@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
// errorcheck
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Verify that illegal uses of ... are detected.
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// Does not compile.
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package main
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import "unsafe"
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func sum(args ...int) int { return 0 }
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var (
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_ = sum(1, 2, 3)
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_ = sum()
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_ = sum(1.0, 2.0)
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_ = sum(1.5) // ERROR "1\.5 .untyped float constant. as int|integer"
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_ = sum("hello") // ERROR ".hello. (.untyped string constant. as int|.type untyped string. as type int)|incompatible"
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_ = sum([]int{1}) // ERROR "\[\]int{.*}.*as int value"
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)
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func sum3(int, int, int) int { return 0 }
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func tuple() (int, int, int) { return 1, 2, 3 }
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var (
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_ = sum(tuple())
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_ = sum(tuple()...) // ERROR "\.{3} with 3-valued|multiple-value"
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_ = sum3(tuple())
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_ = sum3(tuple()...) // ERROR "\.{3} in call to non-variadic|multiple-value|invalid use of .*[.][.][.]"
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)
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type T []T
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func funny(args ...T) int { return 0 }
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var (
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_ = funny(nil)
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_ = funny(nil, nil)
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_ = funny([]T{}) // ok because []T{} is a T; passes []T{[]T{}}
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)
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func Foo(n int) {}
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func bad(args ...int) {
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print(1, 2, args...) // ERROR "[.][.][.]"
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println(args...) // ERROR "[.][.][.]"
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ch := make(chan int)
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close(ch...) // ERROR "[.][.][.]"
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_ = len(args...) // ERROR "[.][.][.]"
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_ = new(int...) // ERROR "[.][.][.]"
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n := 10
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_ = make([]byte, n...) // ERROR "[.][.][.]"
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_ = make([]byte, 10 ...) // ERROR "[.][.][.]"
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var x int
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_ = unsafe.Pointer(&x...) // ERROR "[.][.][.]"
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_ = unsafe.Sizeof(x...) // ERROR "[.][.][.]"
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_ = [...]byte("foo") // ERROR "[.][.][.]"
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_ = [...][...]int{{1,2,3},{4,5,6}} // ERROR "[.][.][.]"
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Foo(x...) // ERROR "\.{3} in call to non-variadic|invalid use of .*[.][.][.]"
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}
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