100 lines
3.2 KiB
C#
100 lines
3.2 KiB
C#
//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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// file="TokenNodeStack.cs"
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// Project: StgSharp
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// AuthorGroup: Nitload Space
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// Copyright (c) Nitload Space. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the “Software”), to deal in the Software without restriction,
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// including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software,
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// and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and
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// this permission notice shall be included in all copies
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// or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED “AS IS”,
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// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH
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// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.Script
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{
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public class TokenNodeStack<TNode, TType>
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where TNode: IASTNode<TNode, TType>
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where TType: ITypeSource<TType>
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{
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private Stack<bool> _isNode;
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private Stack<TNode> _nodes;
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private Stack<Token> _tokens;
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public TokenNodeStack()
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{
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_nodes = new Stack<TNode>( 4 );
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_tokens = new Stack<Token>( 4 );
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_isNode = new Stack<bool>( 8 );
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}
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public int Count => _isNode.Count;
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public bool Peek( out Token t, TNode n )
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{
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if( _isNode.Peek() ) {
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n = _nodes.Peek();
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t = Token.Empty;
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return true;
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} else {
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t = _tokens.Peek();
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n = TNode.Empty;
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return false;
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}
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}
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public bool Pop( out Token t, out TNode n )
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{
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if( _isNode.Pop() ) {
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n = _nodes.Pop();
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t = Token.Empty;
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return true;
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} else {
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t = _tokens.Pop();
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n = TNode.Empty;
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return false;
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}
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}
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public void Push( TNode node )
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{
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_nodes.Push( node );
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_isNode.Push( true );
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}
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public void Push( Token token )
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{
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_tokens.Push( token );
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_isNode.Push( false );
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}
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}
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}
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