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0b739fd4df
Part of the general trend of moving yyerror calls out of walk and into typecheck. Notably, this requires splitting test/typeswitch2.go into two files, because now some of the errors are reported during typecheck and others are still reported during walk; and if there were any errors during typecheck, then cmd/compile exits without invoking walk. Passes toolstash-check. Change-Id: I05ee0c00b99af659ee1eef098d342d0d736cf31e Reviewed-on: https://go-review.googlesource.com/c/go/+/194659 Reviewed-by: Robert Griesemer <gri@golang.org>
21 lines
598 B
Go
21 lines
598 B
Go
// errorcheck
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// Copyright 2019 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 various erroneous type switches are caught by the compiler.
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// Does not compile.
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package main
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func notused(x interface{}) {
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// The first t is in a different scope than the 2nd t; it cannot
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// be accessed (=> declared and not used error); but it is legal
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// to declare it.
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switch t := 0; t := x.(type) { // ERROR "declared and not used"
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case int:
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_ = t // this is using the t of "t := x.(type)"
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}
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}
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