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cmd/compile/internal/syntax: generalize error about var decls in init clauses
Change-Id: I62f9748b97bec245338ebf9686fbf6ad6dc6a9c2 Reviewed-on: https://go-review.googlesource.com/36931 Run-TryBot: Robert Griesemer <gri@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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@ -1703,8 +1703,8 @@ func (p *parser) header(keyword token) (init SimpleStmt, cond Expr, post SimpleS
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if p.tok != _Semi {
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// accept potential varDecl but complain
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if keyword == _For && p.got(_Var) {
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p.syntax_error("var declaration not allowed in for initializer")
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if p.got(_Var) {
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p.syntax_error(fmt.Sprintf("var declaration not allowed in %s initializer", keyword.String()))
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}
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init = p.simpleStmt(nil, keyword == _For)
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// If we have a range clause, we are done (can only happen for keyword == _For).
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@ -1,11 +0,0 @@
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// 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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package main
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func main() {
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var x int // avoid undefined: x error below with recursive-descent parser
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for var x = 0; x < 10; x++ { // ERROR "var declaration not allowed in for initializer"
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15
test/syntax/initvar.go
Normal file
15
test/syntax/initvar.go
Normal file
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@ -0,0 +1,15 @@
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// 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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package main
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func main() {
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if var x = 0; x < 10 {} // ERROR "var declaration not allowed in if initializer"
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switch var x = 0; x {} // ERROR "var declaration not allowed in switch initializer"
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for var x = 0; x < 10; {} // ERROR "var declaration not allowed in for initializer"
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}
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