First public commit!

2017-08-18 03:07:43 -05:00
parent 2c754790e6
commit 5a8ddf6978
91 changed files with 17165 additions and 1 deletions
--- a/YATC/ASTNodes/LocalNode/ExpressionNode/AtomicNode/LetNode.cs
+++ b/YATC/ASTNodes/LocalNode/ExpressionNode/AtomicNode/LetNode.cs
@@ -0,0 +1,131 @@
+/*
+ *  Yet Another Tiger Compiler (YATC)
+ *
+ *  Copyright 2014 Damian Valdés Santiago, Juan Carlos Pujol Mainegra
+ *  
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *  
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *  
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.  
+ *
+ */
+ 
+using Antlr.Runtime;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Reflection.Emit;
+using YATC.Scope;
+
+namespace YATC.ASTNodes
+{
+    class LetNode : AtomicNode
+    {
+        public LetNode(IToken payload)
+            : base(payload)
+        {
+        }
+
+        public IEnumerable<DeclarationNode> DeclarationNodes { get { return TigerChildren[0].TigerChildren.Cast<DeclarationNode>(); } }
+        public ExprSeqNode ExprSeqNode
+        {
+            get
+            {
+                return (ExprSeqNode)TigerChildren[1];
+            }
+        }
+
+        public override void CheckSemantics(TigerScope scope, Report report)
+        {
+            TigerScope innerScope = scope.CreateChildScope();
+
+            foreach (var declarationNode in this.DeclarationNodes)
+            {
+                declarationNode.CheckSemantics(innerScope, report);
+                if (!declarationNode.IsOK)
+                {
+                    this.TigerType = TigerType.Error;
+                    return;
+                }
+            }
+
+            this.ExprSeqNode.CheckSemantics(innerScope, report);
+            if (!this.ExprSeqNode.IsOk || scope.ContainsType(this.ExprSeqNode.TigerType, false))
+                this.TigerType = this.ExprSeqNode.TigerType;
+            else
+            {
+                report.AddError(this.Line, this.Column,
+                    "Type mismatch: Type '{0}' returned from let declaration is not " +
+                    "defined in an outer scope, or it is a different definition.",
+                    this.ExprSeqNode.TigerType.Name);
+                this.TigerType = TigerType.Error;
+            }
+        }
+
+        internal override void GenerateCode(ModuleBuilder moduleBuilder)
+        {
+            foreach (var declarationNode in DeclarationNodes)
+                declarationNode.GenerateCode(moduleBuilder);
+
+            if (this.ExprSeqNode.ExpressionNodes != null)
+                foreach (var expressionNode in this.ExprSeqNode.ExpressionNodes)
+                    expressionNode.GenerateCode(moduleBuilder);
+
+            // variables
+            IEnumerable<VarDeclNode> varDeclNodes =
+                this.DeclarationNodes.Where(x => x is VarDeclNode).Cast<VarDeclNode>();
+
+            IEnumerable<ParameterExpression> variables =
+                varDeclNodes.Select(x => x.VariableInfo.ParameterExpression);
+
+            IEnumerable<Expression> initVariablesExpressions =
+                varDeclNodes.Select(varDeclNode =>
+                    Expression.Assign(
+                        varDeclNode.VariableInfo.ParameterExpression,
+                        Expression.Convert(
+                            varDeclNode.RightExpressionNode.VmExpression,
+                            varDeclNode.VariableInfo.Holder.TigerType.GetCLRType()
+                        )
+                    )
+                );
+
+            // fundeclseq
+            IEnumerable<FunDeclSeqNode> funDeclSeqNodes =
+                this.DeclarationNodes.Where(x => x is FunDeclSeqNode).Cast<FunDeclSeqNode>();
+
+            // final
+            IEnumerable<Expression> blockExpressions = initVariablesExpressions.Concat(
+                this.ExprSeqNode.ExpressionNodes != null ? 
+                    (this.ExprSeqNode.ExpressionNodes.Select(x => x.VmExpression)) : 
+                    new Expression[] { Expression.Empty() }
+                );
+
+            var functionClousures = new List<ParameterExpression>();
+            var functionAssigns = new List<Expression>();
+            foreach (var funDeclSeqNode in funDeclSeqNodes)
+            {
+                functionClousures.AddRange(funDeclSeqNode.FunctionClousures);
+                functionAssigns.AddRange(funDeclSeqNode.FunctionAssigns);
+            }
+
+            this.VmExpression = Expression.Block(
+                functionClousures.Concat(variables),
+                functionAssigns.Concat(blockExpressions));
+
+        }
+    }
+}