89 lines
3.2 KiB
C#
89 lines
3.2 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;
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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 ExprSeqNode : AtomicNode
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{
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public ExprSeqNode(IToken payload)
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: base(payload)
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{
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}
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/// <summary>
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/// Says whether the node contains a BreakNode, that is not within the control of a cycle control structure.
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/// </summary>
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public bool HasBreakInside { get; internal set; }
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public ExpressionNode[] ExpressionNodes
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{
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get { return TigerChildren.Length > 0 ?
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TigerChildren.Cast<ExpressionNode>().ToArray() : null; }
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}
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public override void CheckSemantics(TigerScope scope, Report report)
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{
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if (this.ExpressionNodes == null)
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{
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this.TigerType = TigerType.Void;
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return;
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}
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bool allOk = true;
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foreach (var expressionNode in this.ExpressionNodes)
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{
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expressionNode.CheckSemantics(scope, report);
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if (!expressionNode.IsOk)
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allOk = false;
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}
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this.TigerType = allOk
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? ((this.HasBreakInside || ExpressionNodes.Length == 0)
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? TigerType.Void
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: ExpressionNodes[ExpressionNodes.Length - 1].TigerType)
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: TigerType.Error;
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}
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internal override void GenerateCode(ModuleBuilder moduleBuilder)
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{
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if (this.ExpressionNodes != null)
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{
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foreach (var expressionNode in this.ExpressionNodes)
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expressionNode.GenerateCode(moduleBuilder);
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this.VmExpression = Expression.Block(new ParameterExpression[] { },
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this.ExpressionNodes.Select(x => x.VmExpression ?? Expression.Empty()));
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}
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else
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this.VmExpression = Expression.Empty();
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}
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}
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} |