| protected exception_handler ( TryStatement t ) : void | ||
| t | TryStatement | |
| return | void | |
protected void exception_handler(
TryStatement t
)
{
IToken c = null;
IToken x = null;
IToken u = null;
ExceptionHandler eh = null;
TypeReference tr = null;
Expression e = null;
try { // for error handling
c = LT(1);
match(EXCEPT);
{
switch ( LA(1) )
{
case ID:
{
x = LT(1);
match(ID);
break;
}
case AS:
case IF:
case UNLESS:
case COLON:
{
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
{
switch ( LA(1) )
{
case AS:
{
match(AS);
tr=type_reference();
break;
}
case IF:
case UNLESS:
case COLON:
{
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
{
switch ( LA(1) )
{
case IF:
case UNLESS:
{
{
switch ( LA(1) )
{
case IF:
{
match(IF);
break;
}
case UNLESS:
{
u = LT(1);
match(UNLESS);
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
e=boolean_expression();
break;
}
case COLON:
{
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
if (0==inputState.guessing)
{
eh = new ExceptionHandler(ToLexicalInfo(c));
eh.Declaration = new Declaration();
eh.Declaration.Type = tr;
if (x != null)
{
eh.Declaration.LexicalInfo = ToLexicalInfo(x);
eh.Declaration.Name = x.getText();
}
else
{
eh.Declaration.Name = null;
eh.Flags |= ExceptionHandlerFlags.Anonymous;
}
if (tr != null)
{
eh.Declaration.LexicalInfo = tr.LexicalInfo;
}
else if (x != null)
{
eh.Declaration.LexicalInfo = eh.LexicalInfo;
}
if(tr == null)
{
eh.Flags |= ExceptionHandlerFlags.Untyped;
}
if (e != null)
{
if(u != null)
{
UnaryExpression not = new UnaryExpression(ToLexicalInfo(u));
not.Operator = UnaryOperatorType.LogicalNot;
not.Operand = e;
e = not;
}
eh.FilterCondition = e;
eh.Flags |= ExceptionHandlerFlags.Filter;
}
}
compound_stmt(eh.Block);
if (0==inputState.guessing)
{
t.ExceptionHandlers.Add(eh);
}
}
catch (RecognitionException ex)
{
if (0 == inputState.guessing)
{
reportError(ex, "exception_handler");
recover(ex,tokenSet_104_);
}
else
{
throw ex;
}
}
}
