From: matz@... (Yukihiro Matsumoto)
Date: 2001-06-12T14:26:41+09:00
Subject: [ruby-talk:16432] Re: Inital Q's on Ruby grammar

Hi,

In message "[ruby-talk:16431] Inital Q's on Ruby grammar"
    on 01/06/12, Robert Feldt <feldt@ce.chalmers.se> writes:

|* Can you give a regexp for tDXSTRING? If not can you give a context-free
|grammar? If not can you describe what you want? ;-)

tD* are something with #{} inside of it, so tDSTRING is a tSTRING with
#{} inside, tDXSTGRING is a tXSTRING (means ``) with #{}, tDREGEXP is
a REGEXP with #{}.  Syntax are same despite of existence of #{}.

String syntax is kida hard to describe by regexp, just like in other
languages.

String have several syntax ("", '', %Q!!, etc.), but they are resolved
in the lexer.  They are treated uniformly in the parser.

|* What different types of string tokens are there? Which one covers "here
|documents"?

Strings are:

  tSTRING tDSTRING tXSTRING tDXSTRING

Regexps are:

  tREGEXP tDREGEXP


							matz.