// Copyright (C) 2014 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package ast

import "android.googlesource.com/platform/tools/gpu/parse"

// Number represents a typeless numeric constant.
type Number struct {
	CST   *parse.Leaf // underlying parse leaf for this node
	Value string      // the string representation of the constant
}

func (t Number) Node() parse.Node { return t.CST }

// Bool is used for the "true" and "false" keywords.
type Bool struct {
	CST   *parse.Leaf // underlying parse leaf for this node
	Value bool        // The value of the boolean
}

func (t Bool) Node() parse.Node { return t.CST }

// String represents a quoted string constant.
type String struct {
	CST   *parse.Leaf // underlying parse leaf for this node
	Value string      // The body of the string, not including the delimiters
}

func (t String) Node() parse.Node { return t.CST }

// Unknown represents the "?" construct. This is used in places where an
// expression takes a value that is implementation defined.
type Unknown struct {
	CST *parse.Leaf // underlying parse leaf for this node
}

func (t Unknown) Node() parse.Node { return t.CST }

// Null represents the null literal. This is the default value for the inferred
// type, and must be used in a context where the type can be inferred.
type Null struct {
	CST *parse.Leaf // underlying parse leaf for this node
}

func (t Null) Node() parse.Node { return t.CST }