private void CheckReturnStatement(ASTReturnStatementNode retNode)
{
if (retNode.Expression != null)
{
CheckExpression(retNode.Expression);
}
}
/// <summary>
/// Builds return statement
/// </summary>
/// <param name="retNode">Return statement node</param>
private void BuildReturnStatement(ASTReturnStatementNode retNode)
{
if (retNode.Expression != null)
{
BuildExpression(retNode.Expression);
}
//TODO: because all user's subroutines returns System.Object on call side
//and doesn't box
_emitter.Box();
_emitter.Jump(_context.MethodEnd);
}
private void VisitReturnStatement(ASTReturnStatementNode retNode)
{
//first ret statement
if (_hasRet == null)
{
if (retNode.Expression != null)
{
_hasRet = true;
_currentSubroutine.Return = true;
}
else
{
_hasRet = false;
}
}
else //after first
{
//already return value
if ((bool)_hasRet)
{
if (retNode.Expression == null)
{
Messages.Add(new MessageRecord(
MsgCode.AmbiguousReturn,
retNode.SourcePath,
retNode.StartLine,
retNode.StartPos,
"value",
"void"
));
}
}
else //no value return
{
if (retNode.Expression != null)
{
Messages.Add(new MessageRecord(
MsgCode.AmbiguousReturn,
retNode.SourcePath,
retNode.StartLine,
retNode.StartPos,
"void",
"value"
));
}
}
}
}