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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 types_test
import (
"go/parser"
"testing"
. "go/types"
)
var testExprs = []testEntry{
// basic type literals
dup("x"),
dup("true"),
dup("42"),
dup("3.1415"),
dup("2.71828i"),
dup(`'a'`),
dup(`"foo"`),
dup("`bar`"),
// func and composite literals
{"func(){}", "(func() literal)"},
{"func(x int) complex128 {}", "(func(x int) complex128 literal)"},
{"[]int{1, 2, 3}", "([]int literal)"},
// type expressions
dup("[1 << 10]byte"),
dup("[]int"),
dup("*int"),
dup("struct{x int}"),
dup("func()"),
dup("func(int, float32) string"),
dup("interface{m()}"),
dup("interface{m() string; n(x int)}"),
dup("interface{type int}"),
// The following exprs do not get formatted correctly: each element in the
// type list is printed on a separate line. This is left as a placeholder
// until type lists are removed.
// TODO(rfindley): remove this once type lists are gone.
// dup("interface{type int, float64, string}"),
// dup("interface{type int; m()}"),
// dup("interface{type int, float64, string; m() string; n(x int)}"),
dup("map[string]int"),
dup("chan E"),
dup("<-chan E"),
dup("chan<- E"),
// new interfaces
dup("interface{int}"),
dup("interface{~int}"),
dup("interface{~int}"),
dup("interface{int | string}"),
dup("interface{~int | ~string; float64; m()}"),
// See above.
// dup("interface{type a, b, c; ~int | ~string; float64; m()}"),
dup("interface{~T[int, string] | string}"),
// non-type expressions
dup("(x)"),
dup("x.f"),
dup("a[i]"),
dup("s[:]"),
dup("s[i:]"),
dup("s[:j]"),
dup("s[i:j]"),
dup("s[:j:k]"),
dup("s[i:j:k]"),
dup("x.(T)"),
dup("x.([10]int)"),
dup("x.([...]int)"),
dup("x.(struct{})"),
dup("x.(struct{x int; y, z float32; E})"),
dup("x.(func())"),
dup("x.(func(x int))"),
dup("x.(func() int)"),
dup("x.(func(x, y int, z float32) (r int))"),
dup("x.(func(a, b, c int))"),
dup("x.(func(x ...T))"),
dup("x.(interface{})"),
dup("x.(interface{m(); n(x int); E})"),
dup("x.(interface{m(); n(x int) T; E; F})"),
dup("x.(map[K]V)"),
dup("x.(chan E)"),
dup("x.(<-chan E)"),
dup("x.(chan<- chan int)"),
dup("x.(chan<- <-chan int)"),
dup("x.(<-chan chan int)"),
dup("x.(chan (<-chan int))"),
dup("f()"),
dup("f(x)"),
dup("int(x)"),
dup("f(x, x + y)"),
dup("f(s...)"),
dup("f(a, s...)"),
dup("*x"),
dup("&x"),
dup("x + y"),
dup("x + y << (2 * s)"),
}
func TestExprString(t *testing.T) {
for _, test := range testExprs {
x, err := parser.ParseExpr(test.src)
if err != nil {
t.Errorf("%s: %s", test.src, err)
continue
}
if got := ExprString(x); got != test.str {
t.Errorf("%s: got %s, want %s", test.src, got, test.str)
}
}
}
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