private void Visit(ReturnStmt returnStmt)
{
//var expectedType = ReturnTypeStack.Peek();
var expectedType = FunctionStack.Peek().Type;
if (returnStmt.ReturnExpression != null && expectedType.BasicType == ExprType.Void)
{
AddError("Can't return a value in a procedure", returnStmt);
return;
}
if (returnStmt.ReturnExpression == null)
{
if (IsNotVoid(expectedType))
{
AddError("Return statement can't be empty in a function", returnStmt);
}
return;
}
Visit((dynamic)returnStmt.ReturnExpression);
var returnType = TypeStack.Pop();
if (!TypeChecker.TypeCheckAssign(expectedType, returnType))
{
AddError(string.Format("Can't return a value of type {0} in a function of type {1}", returnType, expectedType), returnStmt);
}
}
private void Visit(ReturnStmt returnStmt)
{
if (returnStmt.ReturnExpression != null)
{
Visit((dynamic)returnStmt.ReturnExpression);
}
CurrentMethodIL.Emit(OpCodes.Ret);
}
private Statement ParseReturnStmt()
{
Match(TokenType.KwReturn);
ReturnStmt statement = new ReturnStmt(AcceptedToken);
if (MatchPeek(0, Expression.FirstSet))
{
statement.ReturnExpression = ParseExpression();
}
return(statement);
}