cmd/godefs: import from cmd/cgo

Signed-off-by: Koichi Shiraishi <[email protected]>

Author: zchee

cmd/godefs/ast.go

@@ -0,0 +1,25 @@
+// 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 !go1.18
+
+package main
+
+import (
+	"go/ast"
+	"go/token"
+)
+
+func (f *File) walkUnexpected(x interface{}, context astContext, visit func(*File, interface{}, astContext)) {
+	error_(token.NoPos, "unexpected type %T in walk", x)
+	panic("unexpected type")
+}
+
+func funcTypeTypeParams(n *ast.FuncType) *ast.FieldList {
+	return nil
+}
+
+func typeSpecTypeParams(n *ast.TypeSpec) *ast.FieldList {
+	return nil
+}

cmd/godefs/ast_go1.go

@@ -0,0 +1,32 @@
+// 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 go1.18
+
+package main
+
+import (
+	"go/ast"
+	"go/token"
+)
+
+func (f *File) walkUnexpected(x interface{}, context astContext, visit func(*File, interface{}, astContext)) {
+	switch n := x.(type) {
+	default:
+		error_(token.NoPos, "unexpected type %T in walk", x)
+		panic("unexpected type")
+
+	case *ast.IndexListExpr:
+		f.walk(&n.X, ctxExpr, visit)
+		f.walk(n.Indices, ctxExpr, visit)
+	}
+}
+
+func funcTypeTypeParams(n *ast.FuncType) *ast.FieldList {
+	return n.TypeParams
+}
+
+func typeSpecTypeParams(n *ast.TypeSpec) *ast.FieldList {
+	return n.TypeParams
+}