[antlr-interest] how to let parser control lexer state.
David Holroyd
dave at badgers-in-foil.co.uk
Sat Apr 28 05:47:40 PDT 2007
On Sat, Apr 28, 2007 at 12:14:45PM +0000, David Holroyd wrote:
> On Fri, Apr 27, 2007 at 11:31:45PM -0700, Loring Craymer wrote:
> > You are correct; I hadn't been aware of heredoc. It
> > is still not a problem that needs tieing parser and
> > lexer together.
> [...]
> > Nasty problem. It is amazing how often really bad
> > ideas are adopted.
>
> And yet, there is more!
Another knotty syntax example,
----8<----
a=1
[<<HERE, <<'THERE', <<-WHERE].each {|str| puts "value: #{str.inspect}"}
foo #{a}
HERE
bar #{a}
THERE
foo
and
bar
WHERE
---->8----
When run,
value: "foo 1\n"
value: "bar \#{a}\n"
value: "foo\n and\n bar\n"
Makes the brain itch!
ta,
dave
--
http://david.holroyd.me.uk/
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