Re: [jflex-users] Problems using the "at the beginning of line" char

[master <ma...@lu...>]

Am 01.03.2015 um 15:22 schrieb master:
> Hi,
> I'am new to JFlex and started with a simple scanner for assembler text 
> files.
> A comment line in this assembler starts with ';' and kann appear at 
> the beginning of a line, or somewhere after an expression.
> In the macro section I defined a macro for comments as follows:
>
> comment = ^;([a-zA-Z0-9]+) | (;[a-zA-Z0-9]+)
>
> But running jFlex always stated:
>
> Konsole output
> Syntax error.
> comment = ^;([a-zA-Z0-9]+) | (;[a-zA-Z0-9]+)
>          ^
>
> where he points to the '^' sign.
>
> Why can I not use the legal '^' sign here for referencing the 
> beginning of a line?
>
> Best regards
>
>
>
>
>
>
>
>
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Hi,

after reading the manual again, I found the reason in  chapter 4.2.11 
Macrodefinition:
  ... must not contain the ^, / or $ operators.
):

Best regards