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// Copyright 2013 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.
package constdecl
import "math"
var v int
// Const decls must be initialized by constants.
const _ = v /* ERROR "not constant" */
const _ = math /* ERROR "not constant" */ .Sin(0)
const _ = int /* ERROR "not an expression" */
func _() {
const _ = v /* ERROR "not constant" */
const _ = math /* ERROR "not constant" */ .Sin(0)
const _ = int /* ERROR "not an expression" */
}
// Identifier and expression arity must match.
// The first error message is produced by the parser.
// In a real-world scenario, the type-checker would not be run
// in this case and the 2nd error message would not appear.
const _ /* ERROR "missing constant value" */ /* ERROR "missing init expr for _" */
const _ = 1, 2 /* ERROR "extra init expr 2" */
const _ /* ERROR "missing constant value" */ /* ERROR "missing init expr for _" */ int
const _ int = 1, 2 /* ERROR "extra init expr 2" */
const (
_ /* ERROR "missing constant value" */ /* ERROR "missing init expr for _" */
_ = 1, 2 /* ERROR "extra init expr 2" */
_ /* ERROR "missing constant value" */ /* ERROR "missing init expr for _" */ int
_ int = 1, 2 /* ERROR "extra init expr 2" */
)
const (
_ = 1
_
_, _ /* ERROR "missing init expr for _" */
_
)
const (
_, _ = 1, 2
_, _
_ /* ERROR "extra init expr at" */
_, _
_, _, _ /* ERROR "missing init expr for _" */
_, _
)
func _() {
const _ /* ERROR "missing constant value" */ /* ERROR "missing init expr for _" */
const _ = 1, 2 /* ERROR "extra init expr 2" */
const _ /* ERROR "missing constant value" */ /* ERROR "missing init expr for _" */ int
const _ int = 1, 2 /* ERROR "extra init expr 2" */
const (
_ /* ERROR "missing constant value" */ /* ERROR "missing init expr for _" */
_ = 1, 2 /* ERROR "extra init expr 2" */
_ /* ERROR "missing constant value" */ /* ERROR "missing init expr for _" */ int
_ int = 1, 2 /* ERROR "extra init expr 2" */
)
const (
_ = 1
_
_, _ /* ERROR "missing init expr for _" */
_
)
const (
_, _ = 1, 2
_, _
_ /* ERROR "extra init expr at" */
_, _
_, _, _ /* ERROR "missing init expr for _" */
_, _
)
}
// Test case for constant with invalid initialization.
// Caused panic because the constant value was not set up (gri - 7/8/2014).
func _() {
const (
x string = missing /* ERROR "undeclared name" */
y = x + ""
)
}
// TODO(gri) move extra tests from testdata/const0.src into here
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