[antlr-interest] How to make the lexer thread-safe (C target)?

[Gokulakannan Somasundaram]

Jim,
   Have you thought about providing a way to include variables in the
Lexer/Parser structure that gets created? Currently the Lexer/Parser
structure that gets created because of the grammar only stores the function
pointers.

Thanks,
Gokul.

On Tue, Jul 26, 2011 at 9:51 PM, Gokulakannan Somasundaram <
gokul007 at gmail.com> wrote:

> I had a similar requirement. I maintained a class LexerContext in a Thread
> local variable and accessed it and modified it. There might be better
> solutions.
>
> Thanks,
> Gokul.
>
>
> On Tue, Jul 26, 2011 at 8:07 PM, Mu Qiao <qiaomuf at gmail.com> wrote:
>
>> Hello,
>>
>> My lexer has to rely on some internal status like the following:
>>
>> DQUOTE  :   '"' { if(LA(-1) != '\\') double_quoted = !double_quoted;
>> };
>> SQUOTE  :   { double_quoted }? => '\'';
>> SINGLE_QUOTED_STRING_TOKEN  :   { !double_quoted }? => '\'' .* '\'';
>>
>> "double_quoted" is a bool variable declared in @member section. The
>> generated code will declare it in global scope, which is not thread
>> safe. I wonder if there is any way to make the lexer thread-safe? For
>> example declare the variable in xxxLexer_Ctx_struct.
>>
>> --
>> Best wishes,
>> Mu Qiao
>> GnuPG fingerprint: 92B1 B0C4 8D14 F8C4 EFA5  3ACC 30B3 0DE4 17B1 57E9
>>
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>