ruby - Regexp to match multiline single or double quoted strings -

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i'm building ruby script read ruby sources files looking calls function _() , grabing strings of parameter passed it, can multiline string, single or double quoted, example:

  1. grab: hello world

    _('hello'+ ' world')

  2. grab: hello \nworld

    _("hello \ world")

  3. grab: hello "world"

    _("hello \"world\"")

  4. grab: hello 'world'

    _('hello \'world\'')

so need regexp match , grab string parameter. how can that?

attempting analyze source code regex leads complex fragile code doesn't work in cases. need account enclosing single , double quotes, here docs, quotes within parentheses, etc.

what need ruby lexer. there several of these, written in ruby, in antlr, 1 in lex. lexer parse source tokens, scan token list find pieces want.

you might ideas how looking @ ruby interpreter or @ syntax colouring code in opensource editor.

an alternate way write regex locates interesting tokens, singe quote, double quote, _, (, ), , newline. write finite state machine scans list looking phrases of interest. i've used technique manipulating sql.

what haven't told s actual requirement. there may solution doesn't require of this.


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