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/StatementNode/AssignNode.cs
+++ b/YATC/ASTNodes/LocalNode/ExpressionNode/StatementNode/AssignNode.cs
@@ -0,0 +1,105 @@
+/*
+ *  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.Linq.Expressions;
+using System.Reflection.Emit;
+using YATC.Scope;
+
+namespace YATC.ASTNodes
+{
+    class AssignNode : StatementNode
+    {
+        public AssignNode(IToken payload)
+            : base(payload)
+        {
+        }
+
+        public VarAccessNode LeftValueNode { get { return (VarAccessNode)TigerChildren[0]; } }
+        public ExpressionNode RightExpressionNode { get { return (ExpressionNode)TigerChildren[1]; } }
+
+        public override void CheckSemantics(TigerScope scope, Report report)
+        {
+            this.LeftValueNode.CheckSemantics(scope, report);
+            this.RightExpressionNode.CheckSemantics(scope, report);
+
+            // No se reporta el error para evitar cascadas de errores
+            this.TigerType = this.LeftValueNode.IsOk && this.RightExpressionNode.IsOk
+                ? TigerType.Void
+                : TigerType.Error;
+
+            if (!this.IsOk)
+                return;
+
+            if (this.RightExpressionNode.TigerType.Equals(TigerType.Void))
+            {
+                report.AddError(this.Line, this.Column, "Right hand side must evaluate to a returning value.");
+                this.TigerType = TigerType.Error;
+                return;
+            }
+
+            /* Assignment */
+            if (!this.RightExpressionNode.TigerType.IsAssignableTo(this.LeftValueNode.TigerType))
+            {
+                report.AddError(this.Line, this.Column,
+                                "Type mismatch: Types of variable declaration and expression do not match: '{0}' and '{1}'",
+                                this.LeftValueNode.TigerType.Name, this.RightExpressionNode.TigerType.Name);
+                this.TigerType = TigerType.Error;
+                return;
+            }
+
+            // checks if left variable is not read-only, i.e., it is not defined in a ForNode
+            // la segunda pregunta accessNode == null es por si se quiere agregar campos o arrays
+            if (this.LeftValueNode.VariableInfo.IsReadOnly && this.LeftValueNode.AccessNode == null)
+            {
+                this.TigerType = TigerType.Error;
+                report.AddError(this.Line, this.Column,
+                    "Cannot assign to a read-only variable (it may be declared within a for control structure).");
+                return;
+            }
+
+            this.TigerType = TigerType.Void;
+        }
+
+        internal override void GenerateCode(ModuleBuilder moduleBuilder)
+        {
+            this.LeftValueNode.GenerateCode(moduleBuilder);
+            this.RightExpressionNode.GenerateCode(moduleBuilder);
+
+            //int isOK = (int)(34 < 342);
+
+            this.VmExpression =
+                Expression.Block(
+                    Expression.Assign(
+                        this.LeftValueNode.VmExpression,
+                        Expression.Convert(
+                            this.RightExpressionNode.VmExpression,
+                            this.LeftValueNode.TigerType.GetCLRType()
+                            )
+                        ),
+                    Expression.Empty());
+        }
+    }
+}