81 lines
2.7 KiB
C#
81 lines
2.7 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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class BreakNode : StatementNode
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{
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public BreakNode(IToken payload)
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: base(payload)
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{
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}
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public IBreakeableNode Owner { get; set; }
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public override void CheckSemantics(TigerScope scope, Report report)
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{
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foreach (var node in this.GetNodesToRoot())
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{
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var exprSeq = node as ExprSeqNode;
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if (exprSeq != null)
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exprSeq.HasBreakInside = true;
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var breakable = node as IBreakeableNode;
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if (breakable != null)
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{
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this.Owner = breakable;
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break;
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}
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if (node is FunDeclNode)
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{
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report.AddError(this.Line, this.Column,
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"Break loop control structure not found within function.");
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break;
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}
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}
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if (this.Owner == null)
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{
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report.AddError(Line, Column, "Break does not have a matching loop control structure owner.");
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this.TigerType = TigerType.Error;
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return;
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}
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this.TigerType = TigerType.Void;
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}
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internal override void GenerateCode(ModuleBuilder moduleBuilder)
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{
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this.VmExpression = Expression.Break(this.Owner.BreakTarget);
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}
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}
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}
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