129 lines
4.9 KiB
C#
129 lines
4.9 KiB
C#
//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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// file="ExpNodeGenerator.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 StgSharp.Threading;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.Script.Express
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{
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public partial class ExpNodeGenerator
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{
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private const int EndLine = 1;
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private const int TokenGenerated = 0;
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private const int TokenTypeNotMatch = -1;
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private CompileStack<ExpNode, IExpElementSource> _cache;
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private ExpNode _lastStatement;
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private GeneratedExpSchema _context;
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private IExpElementSource _local;
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public ExpNodeGenerator()
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{
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_cache = new CompileStack<ExpNode, IExpElementSource>();
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}
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/// <summary>
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/// Append a token to top of cache. This method will automatically convert token to node if
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/// meets separators or operators.
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/// </summary>
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public void AppendToken( Token expToken )
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{
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switch( expToken.Flag ) {
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case TokenFlag.Symbol_Unary or TokenFlag.Symbol_Binary:
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int cmp = -1;
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processPrecedence:
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Token tmp = _cache.PeekOperator();
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cmp = CompareOperatorPrecedence( expToken, tmp );
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if( cmp <= 0 ) {
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ConvertOneOperator();
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goto processPrecedence;
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}
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_cache.PushOperand( expToken );
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break;
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case TokenFlag.Number or TokenFlag.String or TokenFlag.Member:
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_cache.PushOperand( expToken );
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break;
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case TokenFlag.Separator_Single: //a , ; found
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//if operator stack is not empty, convert all operators to node until meet a separator
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break;
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case TokenFlag.Separator_Left: //a ( [ { found
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_cache.PushOperator( expToken );
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break;
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case TokenFlag.Separator_Right: //a } ] ) found
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break;
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case TokenFlag.Index_Left: // a [ found
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break;
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case TokenFlag.Index_Right: // a ] found
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break;
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default:
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break;
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}
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}
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public ExpNode GetNextOperandCache()
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{
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if( _cache.PopOperand( out Token t, out ExpNode? n ) ) {
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return n;
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} else { }
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}
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/// <summary>
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/// WARNING: This method cannot process INDEXOF, FUNCTION CALLING, LOOP and any ENDING
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/// SYMBOLS.
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/// </summary>
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private void ConvertOneOperator()
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{
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Token @operator = _cache.PopOperator();
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switch( @operator.Flag ) {
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case TokenFlag.Symbol_Unary:
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TryGenerateUnaryNode( @operator, out ExpNode? node );
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_cache.PushOperand( node );
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break;
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case TokenFlag.Symbol_Binary:
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TryGenerateBinaryNode( @operator, out node );
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_cache.PushOperand( node );
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break;
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default:
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break;
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}
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}
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}
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}
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