#202 - codegen

Author: Stepami

src/Application/HydraScript.Application.CodeGeneration/Visitors/ExpressionInstructionProvider.cs

@@ -151,13 +151,22 @@ public AddressedInstructions Visit(BinaryExpression visitable)
 
     public AddressedInstructions Visit(CastAsExpression visitable)
     {
+        Func<IValue, IExecutableInstruction> asFactory = visitable.ToType switch
+        {
+            CastAsExpression.DestinationType.Undefined => throw new NotSupportedException(),
+            CastAsExpression.DestinationType.String => value => new AsString(value),
+            CastAsExpression.DestinationType.Number => value => new AsNumber(value),
+            CastAsExpression.DestinationType.Boolean => value => new AsBool(value),
+            _ => throw new ArgumentOutOfRangeException(nameof(visitable.ToType))
+        };
+
         if (visitable.Expression is PrimaryExpression primary)
-            return [new AsString(_valueFactory.Create(primary.ToValueDto()))];
-        
+            return [asFactory(_valueFactory.Create(primary.ToValueDto()))];
+
         var result = visitable.Expression.Accept(This);
         var last = result.OfType<Simple>().Last().Left!;
-        result.Add(new AsString(last));
-        
+        result.Add(asFactory(last));
+
         return result;
     }
 

src/Application/HydraScript.Application.StaticAnalysis/Visitors/SemanticChecker.cs

@@ -442,6 +442,13 @@ public Type Visit(CastAsExpression visitable)
             throw new CannotDefineType(visitable.Expression.Segment);
 
         var to = visitable.Cast.Accept(_typeBuilder);
+        visitable.ToType = to switch
+        {
+            _ when to.Equals("string") => CastAsExpression.DestinationType.String,
+            _ when to.Equals("number") => CastAsExpression.DestinationType.Number,
+            _ when to.Equals("boolean") => CastAsExpression.DestinationType.Boolean,
+            _ => CastAsExpression.DestinationType.Undefined
+        };
 
         return _explicitCastValidator.IsAllowed(from, to)
             ? to

src/Domain/HydraScript.Domain.FrontEnd/Parser/Impl/Ast/Nodes/Expressions/CastAsExpression.cs

@@ -9,6 +9,7 @@ public partial class CastAsExpression : Expression
 
     public Expression Expression { get; }
     public TypeValue Cast { get; }
+    public DestinationType ToType { get; set; }
 
     public CastAsExpression(Expression expression, TypeValue cast)
     {
@@ -28,4 +29,12 @@ public override void InitScope(Scope? scope = null)
     }
 
     protected override string NodeRepresentation() => $"as {Cast}";
+
+    public enum DestinationType
+    {
+        Undefined,
+        String,
+        Number,
+        Boolean,
+    }
 }