public Expr VariableAssign(AnalyzerContext analyzer, string variableName, ExprBuilderObj rightExpr)
{
var right = analyzer.Analyze(rightExpr); //new ExprLazy(() => analyzer.Analyze(rightExpr));
var variable = new Variable(variableName, () => right.Type, right.IsConstant ? right : null);
analyzer.Context.AddVariable(variable);
// In case of a function: New type is defined mapping the given variable name
// to the return type of the function.
// TODO For testing?
analyzer.Context.AddType(variable.Name, () => {
var funType = variable.Type.ConcreteType as TypeFunction;
if (funType == null)
{
throw new CompilationException("Not a type: " + variable.Name);
}
// Generic types
var genType = variable.Type as TypeGenericContext;
if (genType != null)
{
return(new TypeGenericContext(funType.ReturnType, genType.GenericParameters));
}
return(funType.ReturnType);
});
//Console.WriteLine("Type defined: " + variable.Name);
return(new ExprImpl(TypeSingleton.Void, exprWriter.WriteVariable(analyzer.Context.GetReferenceIndex(variable), right)));
}
public Expr ContextVariable(AnalyzerContext analyzer, ExprBuilderObj leftExpr, string varName)
{
var type = new TypeContext(new Variable(varName, analyzer.ExpectedType ?? TypeSingleton.Any));
var left = analyzer.Analyze(leftExpr, type);
var contextType = left.Type.ConcreteType as TypeContext;
var variable = contextType.Variables.GetAssignableTo(varName, analyzer.ExpectedType);
if (variable == null)
{
analyzer.Fail("Unknown context variable name: " + varName);
}
var variable2 = contextType.Variables.GetAssignableTo(varName, analyzer.ExpectedType);
var refIndex = contextType.Variables.GetReferenceIndex(variable) + 1; // TODO +1 is for the base context
var expr = new ExprImpl(variable.Type, exprWriter.ReadContextVariable(refIndex));
return(new ExprImpl(variable.Type, exprWriter.Sequence(left, expr)));
}
public Expr CheckedCast(AnalyzerContext analyzer, TypeName type, ExprBuilderObj expr)
{
var typeCast = type.Resolve(analyzer.Context);
return(new ExprImpl(typeCast, analyzer.Analyze(expr, typeCast)));
}