47 lines
945 B
C#
47 lines
945 B
C#
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using System.Collections.Generic;
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using System.Linq;
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namespace Rokojori;
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public class ExpressionParser:ParserPhase
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{
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public List<PrecedenceLevel> levels = [];
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public override void Process( Parser parser )
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{
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ProcessExpression( parser.root );
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}
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public void ProcessExpression( ASTNode expressionParent )
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{
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var parser = expressionParent.parser;
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for ( int i = 0; i < levels.Count; i++ )
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{
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var changed = levels[ i ].Process( expressionParent );
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if ( parser.hasErrors )
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{
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return;
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}
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if ( changed )
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{
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i = -1;
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}
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}
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}
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protected PrecedenceLevel AddPrecedenceLevel( params ExpressionOperator[] operators )
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{
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var level = new PrecedenceLevel();
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level.operators.AddRange( operators );
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var isFromRight = operators.Find( op => ! op.IsFromLeft() ) != null;
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level.fromLeft = ! isFromRight;
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this.levels.Add( level );
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return level;
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}
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}
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