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// Copyright 2021 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.
//go:build go1.20
// +build go1.20
package ssa_test
import (
"go/ast"
"go/parser"
"go/token"
"go/types"
"testing"
"golang.org/x/tools/go/ssa"
"golang.org/x/tools/go/ssa/ssautil"
)
func TestBuildPackageGo120(t *testing.T) {
tests := []struct {
name string
src string
importer types.Importer
}{
{"slice to array", "package p; var s []byte; var _ = ([4]byte)(s)", nil},
{"slice to zero length array", "package p; var s []byte; var _ = ([0]byte)(s)", nil},
{"slice to zero length array type parameter", "package p; var s []byte; func f[T ~[0]byte]() { tmp := (T)(s); var z T; _ = tmp == z}", nil},
{"slice to non-zero length array type parameter", "package p; var s []byte; func h[T ~[1]byte | [4]byte]() { tmp := T(s); var z T; _ = tmp == z}", nil},
{"slice to maybe-zero length array type parameter", "package p; var s []byte; func g[T ~[0]byte | [4]byte]() { tmp := T(s); var z T; _ = tmp == z}", nil},
}
for _, tc := range tests {
tc := tc
t.Run(tc.name, func(t *testing.T) {
t.Parallel()
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, "p.go", tc.src, parser.ParseComments)
if err != nil {
t.Error(err)
}
files := []*ast.File{f}
pkg := types.NewPackage("p", "")
conf := &types.Config{Importer: tc.importer}
if _, _, err := ssautil.BuildPackage(conf, fset, pkg, files, ssa.SanityCheckFunctions); err != nil {
t.Errorf("unexpected error: %v", err)
}
})
}
}
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