70 lines
2.5 KiB
C#
70 lines
2.5 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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class AliasDeclNode : DeclarationNode
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{
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public AliasDeclNode(IToken payload)
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: base(payload)
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{
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}
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public TypeNode TypeNode { get { return (TypeNode)TigerChildren[0]; } }
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public override bool CheckHeader(TigerScope scope, Report report, string name)
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{
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this.TigerTypeInfo = new TigerTypeInfo(name, new TigerTypeHolder(), false);
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scope.Add(this.TigerTypeInfo);
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return true;
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}
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public override void CheckSemantics(TigerScope scope, Report report)
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{
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// type is an alias of another type, then follow.
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TigerTypeInfo aliasTo = scope.FindTypeInfo(this.TypeNode.Name, false);
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if (aliasTo == null)
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{
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report.AddError(this.Line, this.Column, "Alias to undeclared type: '{0}'.", this.TypeNode.Name);
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this.IsOK = false;
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return;
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}
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this.TigerTypeInfo.Holder.TigerType = aliasTo.Holder.TigerType;
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this.IsOK = true;
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}
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internal override void GenerateCode(ModuleBuilder moduleBuilder)
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{
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// do nothing
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}
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}
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}
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