100 lines
3.7 KiB
C#
100 lines
3.7 KiB
C#
/*
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* Yet Another Tiger Compiler (YATC)
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*
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* Copyright 2014 Damian Valdés Santiago, Juan Carlos Pujol Mainegra
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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using Antlr.Runtime;
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using System.Linq.Expressions;
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using System.Reflection.Emit;
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using YATC.Scope;
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namespace YATC.ASTNodes
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{
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public class ArrayAccessNode : AccessNode
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{
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public ArrayAccessNode(IToken payload)
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: base(payload)
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{
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}
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public ExpressionNode IndexExpressionNode { get { return (ExpressionNode) TigerChildren[0]; } }
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public AccessNode AccessNode { get { return TigerChildren.Length > 1 ? (AccessNode)TigerChildren[1] : null; } }
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public override void CheckSemantics(TigerScope scope, Report report)
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{
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this.IndexExpressionNode.CheckSemantics(scope, report);
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if (!this.IndexExpressionNode.IsOk)
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{
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this.TigerType = TigerType.Error;
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return;
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}
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if (this.IndexExpressionNode.TigerType.Basetype != BaseType.Int)
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{
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this.TigerType = TigerType.Error;
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report.AddError(this.Line, this.Column,
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"Type mismatch: Cannot index with a non-integer expression: '{0}' was found.",
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this.IndexExpressionNode.TigerType.Name);
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return;
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}
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if (this.ParentType.Basetype != BaseType.Array)
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{
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report.AddError(this.Line, this.Column,
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"Type mismatch: Variable or field is not an array: '{0}' was found.",
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this.ParentType.Name);
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this.TigerType = TigerType.Error;
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return;
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}
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TigerType parentType = ((ArrayType)this.ParentType).ElementTypeHolder.TigerType;
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if (this.AccessNode == null)
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{
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this.TigerType = parentType;
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}
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else
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{
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this.AccessNode.ParentType = parentType;
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this.AccessNode.CheckSemantics(scope, report);
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this.TigerType = AccessNode.TigerType;
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}
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}
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internal override void GenerateCode(ModuleBuilder moduleBuilder)
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{
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this.IndexExpressionNode.GenerateCode(moduleBuilder);
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this.VmExpression = Expression.ArrayAccess(
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this.VmExpression,
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this.IndexExpressionNode.VmExpression
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);
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if (this.AccessNode == null)
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return;
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this.AccessNode.VmExpression = this.VmExpression;
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this.AccessNode.GenerateCode(moduleBuilder);
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this.VmExpression = this.AccessNode.VmExpression;
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}
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}
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}
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