IMPORTANT ANNOUNCEMENT

Reproduce
=========
Create an expression containing a "===" e.g. in an opt:if condition (like in my case) and compile it.

~~~ snip: a.tpl ~~~
<opt:if test="$edit === true">
~~~ END snip: a.tpl ~~~


Result
======
The compiler struggles interpreting "===" and raises the following exception:

~~~ snip: cli output ~~~
PHP Fatal error: Uncaught exception 'Opt_Expression_Exception' with message 'Invalid token: =' in /Opt/Expression/Standard/Parser.php:2062
Stack trace:
#0 /Opt/Expression/Standard/Parser.php(2120): Opt_Expression_Standard_Parser->yy_syntax_error(25, '=')
#1 /Opt/Expression/Standard.php(177): Opt_Expression_Standard_Parser->doParse(25, '=')
#2 /Opt/Compiler/Class.php(1946): Opt_Expression_Standard->parse('$edit === true', true)
#3 /Opt/Instruction/Abstract.php(606): Opt_Compiler_Class->parseExpression('$edit === true', 'parse')
#4 /Opt/Instruction/Abstract.php(479): Opt_Instruction_Abstract->_extractAttribute(Object(Opt_Xml_Element), Object(Opt_Xml_Attribute), 6, NULL)
#5 /Opt/Instruction/If.php(107): Opt_Instruction_Abstract->_extractAttributes(Object(Opt_Xml_Element), Array)
#6 /Opt/Xml/Element.php(503): Opt_Instruction_If->proc in /Opt/Expression/Standard/Parser.php on line 2062
~~~ END snip: cli output ~~~


adding the following PHP code in Opt/Expression/Standard.php on line 172 (in the while loop) I get the output following afterwards.

~~~ snip: PHP code ~~~
if($expr == '$edit === true') {
echo "{$lexer->token} ## {$lexer->value}\n";
}
~~~ END snip: PHP code ~~~

~~~ snip: debug output ~~~
57 ## $
50 ## edit
w ##
4 ## ==
25 ## =
... The error message
~~~ END snip: debug output ~~~


Assumption
==========
I guess the lexer sees the valid "==" token and accepts it before finding an also valid "===". Perhaps this is because of an wrong order in tools/lexer/expression_lexer.plex as shown below:

~~~ snip: expression_lexer.plex ~~~
identifier {
switch($this->value)
{
[...]
case 'eq':
$this->token = Opt_Expression_Standard_Parser::T_EQUALS;
break;
case 'neq':
$this->token = Opt_Expression_Standard_Parser::T_NEQUALS;
case 'eqt':
$this->token = Opt_Expression_Standard_Parser::T_EQUALS_T;
break;
case 'neqt':
$this->token = Opt_Expression_Standard_Parser::T_NEQUALS_T;
break;

~~~ END snip: expression_lexer.plex ~~~