how to handle comments alongside regular code

[haroldo...@gmail.com]

hi, i'd like to write a parser to a DSL in which I have a lot of code written. There are comments, as usual. I believe the comments are a constituent part of the operational body. Should I put the comments nonterminal in each G1 rule , so that I can do things with them as I do things with the DSL lines ? Or should I parse twice , one with the comments, and one with the code, and then link them back somehow?

thanks!
Haroldo

[Durand Jean-Damien]

Usually comments are managed by a :discard rule, for example:

:discard ~ <Cplusplus style comment>

:discard ~ <C style comment>

##########################

# Discard of a C++ comment

##########################

<Cplusplus style comment> ~ '//' <Cplusplus comment interior>

<Cplusplus comment interior> ~ [^\n]*

############################################################################

# Discard of a C comment, c.f. https://gist.github.com/jeffreykegler/5015057

############################################################################

<C style comment> ~ '/*' <comment interior> '*/'

<comment interior> ~

    <optional non stars>

    <optional star prefixed segments>

    <optional pre final stars>

<optional non stars> ~ [^*]*

<optional star prefixed segments> ~ <star prefixed segment>*

<star prefixed segment> ~ <stars> [^/*] <optional star free text>

<stars> ~ [*]+

<optional star free text> ~ [^*]*

<optional pre final stars> ~ [*]*

Regards, Jean-Damien