79 lines
2.9 KiB
C#
79 lines
2.9 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.Reflection.Emit;
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using YATC.Scope;
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namespace YATC.ASTNodes
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{
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internal class VarAccessNode : AtomicNode
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{
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public VarAccessNode(IToken payload)
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: base(payload)
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{
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}
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public TypeNode IdNode { get { return (TypeNode)TigerChildren[0]; } }
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public AccessNode AccessNode { get { return TigerChildren.Length > 1 ? (AccessNode)TigerChildren[1] : null; } }
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public string Name { get { return IdNode.Text; } }
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public VariableInfo VariableInfo { get; set; }
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public override void CheckSemantics(TigerScope scope, Report report)
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{
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this.VariableInfo = scope.FindVariableInfo(this.Name, false);
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if (this.VariableInfo == null)
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{
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report.AddError(this.Line, this.Column, "Undeclared variable: '{0}'.", this.Name);
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this.TigerType = TigerType.Error;
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return;
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}
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if (this.AccessNode != null)
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{
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this.AccessNode.ParentType = this.VariableInfo.Holder.TigerType;
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this.AccessNode.CheckSemantics(scope, report);
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this.TigerType = this.AccessNode.TigerType;
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return;
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}
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this.TigerType = VariableInfo.Holder.TigerType;
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}
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internal override void GenerateCode(ModuleBuilder moduleBuilder)
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{
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this.VmExpression = this.VariableInfo.ParameterExpression;
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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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