First public commit!

YATC/ASTNodes/LocalNode/ExpressionNode/RecordInstNode.cs

@@ -0,0 +1,154 @@
+/*
+ *  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;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Reflection.Emit;
+using YATC.Scope;
+
+namespace YATC.ASTNodes
+{
+    class RecordInstNode : ExpressionNode
+    {
+        public RecordInstNode(IToken payload)
+            : base(payload)
+        {
+        }
+
+        public TypeNode IdNode { get { return (TypeNode)TigerChildren[0]; } }
+        public FieldInstNode[] FieldInstNodes
+        {
+            get
+            {
+                return TigerChildren.Length > 1 ?
+                    TigerChildren[1].TigerChildren.Cast<FieldInstNode>().ToArray() :
+                    new FieldInstNode[] {};
+            }
+        }
+        private RecordType _recordType;
+
+        public override void CheckSemantics(TigerScope scope, Report report)
+        {
+            TigerTypeInfo recordInfo = scope.FindTypeInfo(this.IdNode.Name, false);
+            if (recordInfo == null)
+            {
+                report.AddError(this.Line, this.Column,
+                    "Undeclared record type: '{0}'.", this.IdNode.Name);
+                this.TigerType = TigerType.Error;
+                return;
+            }
+
+            if (recordInfo.Holder.TigerType.Basetype != BaseType.Record)
+            {
+                report.AddError(this.Line, this.Column,
+                    "Type mismatch: given type is not a record: '{0}'.", this.IdNode.Name);
+                this.TigerType = TigerType.Error;
+                return;
+            }
+
+            _recordType = recordInfo.Holder.TigerType as RecordType;
+            if (_recordType == null)
+                throw new NullReferenceException();
+
+            if (_recordType.FieldInfos.Length != this.FieldInstNodes.Length)
+            {
+                report.AddError(this.Line, this.Column,
+                    "Record fields length mismatch '{0}': expecting {1} and {2} found.",
+                    this.IdNode.Name,
+                    _recordType.FieldInfos.Length,
+                    this.FieldInstNodes.Length);
+                this.TigerType = TigerType.Error;
+                return;
+            }
+
+            for (int i = 0; i < this.FieldInstNodes.Length; i++)
+            {
+                FieldInstNode field = this.FieldInstNodes[i];
+
+                if (field.IdNode.Name != _recordType.FieldInfos[i].Name)
+                {
+                    report.AddError(this.Line, this.Column,
+                        "Field name mismatch: field number {0} of type '{1}' should be called '{2}' instead of '{3}'.",
+                        i.ToString(),
+                        this.IdNode.Name,
+                        _recordType.FieldInfos[i].Name,
+                        field.IdNode.Name);
+                    this.TigerType = TigerType.Error;
+                    return;
+                }
+
+                field.ExpressionNode.CheckSemantics(scope, report);
+                if (!field.ExpressionNode.IsOk)
+                {
+                    this.TigerType = TigerType.Error;
+                    return;
+                }
+
+                if (!field.ExpressionNode.TigerType.IsAssignableTo(_recordType.FieldInfos[i].Holder.TigerType))
+                {
+                    report.AddError(this.Line, this.Column,
+                        "Type mismatch: field '{1}' of type '{0}' should be of type '{2}' instead of '{3}'",
+                        this.IdNode.Name, field.IdNode.Name,
+                        _recordType.FieldInfos[i].Holder.TigerType.Name, field.ExpressionNode.TigerType.Name);
+                    this.TigerType = TigerType.Error;
+                    return;
+                }
+            }
+
+            this.TigerType = _recordType;
+        }
+
+        internal override void GenerateCode(ModuleBuilder moduleBuilder)
+        {
+            NewExpression ctor = Expression.New(this.TigerType.GetCLRType());
+            ParameterExpression tmp = Expression.Parameter(this.TigerType.GetCLRType());
+            var fieldBindings = new MemberBinding[_recordType.FieldInfos.Length];
+
+            for (int i = 0; i < FieldInstNodes.Length; i++)
+            {
+                this.FieldInstNodes[i].ExpressionNode.GenerateCode(moduleBuilder);
+
+                fieldBindings[i] = Expression.Bind(
+                    _recordType.GetCLRType().GetMember(_recordType.FieldInfos[i].Name)[0],
+                    Expression.Convert(
+                        this.FieldInstNodes[i].ExpressionNode.VmExpression,
+                        _recordType.FieldInfos[i].Holder.TigerType.GetCLRType()
+                    )
+                );
+            }
+
+            Expression initializer = Expression.MemberInit(ctor, fieldBindings);
+
+            var assign = Expression.Assign(tmp, initializer);
+            BlockExpression initBlockExpression = Expression.Block(
+                    new ParameterExpression[] { tmp },
+                    new Expression[] { assign, tmp });
+
+            this.VmExpression = initBlockExpression;
+        }
+    }
+}