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Name	Size	Permission
blank.src	203 B	-rw-r--r--
builtins.src	23.77 KB	-rw-r--r--
const0.src	8.32 KB	-rw-r--r--
const1.src	8.04 KB	-rw-r--r--
constdecl.src	3.02 KB	-rw-r--r--
conversions.src	1.71 KB	-rw-r--r--
conversions2.src	5.07 KB	-rw-r--r--
cycles.src	2.79 KB	-rw-r--r--
cycles1.src	781 B	-rw-r--r--
cycles2.src	1.21 KB	-rw-r--r--
cycles3.src	675 B	-rw-r--r--
cycles4.src	1.76 KB	-rw-r--r--
cycles5.src	2.91 KB	-rw-r--r--
decls0.src	3.91 KB	-rw-r--r--
decls1.src	3.57 KB	-rw-r--r--
decls2a.src	3.11 KB	-rw-r--r--
decls2b.src	1.87 KB	-rw-r--r--
decls3.src	4.17 KB	-rw-r--r--
decls4.src	2.99 KB	-rw-r--r--
decls5.src	363 B	-rw-r--r--
errors.src	1.9 KB	-rw-r--r--
expr0.src	3.39 KB	-rw-r--r--
expr1.src	2.57 KB	-rw-r--r--
expr2.src	4.63 KB	-rw-r--r--
expr3.src	14.87 KB	-rw-r--r--
gotos.src	5.77 KB	-rw-r--r--
importC.src	1.21 KB	-rw-r--r--
importdecl0a.src	1.24 KB	-rw-r--r--
importdecl0b.src	1000 B	-rw-r--r--
importdecl1a.src	521 B	-rw-r--r--
importdecl1b.src	260 B	-rw-r--r--
init0.src	1.91 KB	-rw-r--r--
init1.src	1.46 KB	-rw-r--r--
init2.src	3.51 KB	-rw-r--r--
issue23203a.src	306 B	-rw-r--r--
issue23203b.src	306 B	-rw-r--r--
issue25008a.src	260 B	-rw-r--r--
issue25008b.src	198 B	-rw-r--r--
issue26390.src	241 B	-rw-r--r--
issue28251.src	1.23 KB	-rw-r--r--
issue6977.src	2.33 KB	-rw-r--r--
issues.src	9.83 KB	-rw-r--r--
labels.src	3.25 KB	-rw-r--r--
literals.src	2.35 KB	-rw-r--r--
methodsets.src	3.16 KB	-rw-r--r--
shifts.src	12.02 KB	-rw-r--r--
stmt0.src	17.79 KB	-rw-r--r--
stmt1.src	3.31 KB	-rw-r--r--
vardecl.src	5.27 KB	-rw-r--r--

Code Editor : constdecl.src

// 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"
import "unsafe"

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 + ""
	)
}

// Test case for constants depending on function literals (see also #22992).
const A /* ERROR initialization cycle */ = unsafe.Sizeof(func() { _ = A })

func _() {
	// The function literal below must not see a.
	const a = unsafe.Sizeof(func() { _ = a /* ERROR "undeclared name" */ })
	const b = unsafe.Sizeof(func() { _ = a })

// The function literal below must not see x, y, or z.
	const x, y, z = 0, 1, unsafe.Sizeof(func() { _ = x /* ERROR "undeclared name" */ + y /* ERROR "undeclared name" */ + z /* ERROR "undeclared name" */ })
}

// TODO(gri) move extra tests from testdata/const0.src into here

${this.title}

Code Editor : constdecl.src