I was then panic-king because I got this:
Match Failure
Felix location: /usr/local/lib/felix/felix-1.1.7dev/lib/std/regdef.flx
20[10]-20[3]
C++ location :
/Users/johnskaller/.felix/cache/text/Users/johnskaller/felix/./bug.cpp 157
using regdefs for the libcontents system, instead of straight Perl strings
(using RE2).
The bug was in the "render" function which just converts the regexp AST to a
Perl string.
That function is pretty simple functional code and shouldn't fail (although I
did get an
assertion error and discovered it can't handle zero length strings -- this was
trapped
by a pre-condition).
It looked like the complex variant encoding was failing. But there are working
test
cases. My bug code was like this:
/////////////////////////////
open Regdef;
regdef anychar = perl (".");
regdef letter = charset "abc";
regdef vlist = "[" spaces letter (spaces "," spaces letter)* spaces "]";
regdef binder = "ctor" (spaces vlist)?;
regdef indent2 = " ";
regdef spaces = " "*;
regdef classbind= group ("class" | "open class");
regdef otherbind= indent2 group (spaces binder);
// Group 1 = class
// Group 2 = other
// group 3 = identifier
regdef decl = (classbind | otherbind) spaces group (letter) anychar*;
var lregex = decl . render;
println$ lregex;
////////////////////
Now, the thing is, the Felix compiler has got pretty reliable these days.
It may have bugs, but the test suite would pick up this kind of thing.
So I fiddled with it ...
There's a bug in the compiler alright. But not something complex.
Can you see it?
[Hint: don't look for something complex! Its something brain dead ! ]
--
john skaller
skal...@users.sourceforge.net
http://felix-lang.org
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