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// Copyright 2011 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
// A Map represents a map type.
type Map struct {
key, elem Type
// NewMap returns a new map for the given key and element types.
func NewMap(key, elem Type) *Map {
return &Map{key: key, elem: elem}
// Key returns the key type of map m.
func (m *Map) Key() Type { return m.key }
// Elem returns the element type of map m.
func (m *Map) Elem() Type { return m.elem }
func (t *Map) Underlying() Type { return t }
func (t *Map) String() string { return TypeString(t, nil) }