From @masak

<masak> rakudo​: module M; grammar G {}; say "foo" ~~ /<M​::G>/
<p6eval> rakudo 5351a3​: OUTPUT«Null PMC access in set_attr_str() [...]
<masak> I know that's not the way to match against a grammar, but --
look, a Null PMC access!
* masak submits a rakuodbug

From @bbkr

on Kiev build​:

[16​:51] <bbkr> rakudo​: module M; grammar G {}; say "foo" ~~ /<M​::G>/
[16​:51] <p6eval> rakudo f34e78​: OUTPUT«===SORRY!===␤regex assertion not
terminated by angle bracket at line 11, near "​::G>/"␤»
[16​:52] <bbkr> std​: module M; grammar G {}; say "foo" ~~ /<M​::G>/
[16​:52] <p6eval> std 31444​: OUTPUT«ok 00​:01 112m␤»

@coke - Status changed from 'new' to 'open'

From @bbkr

NOM

still broken

bbkr​:nom bbkr$ ./perl6 -e 'module M; grammar G {}; say "foo" ~~ /<M​::G>/'
===SORRY!===
regex assertion not terminated by angle bracket at line 1, near "​::G>/"

From @moritz

It works now when explicitly calling a rule in that grammar​:

$ ./perl6 -e 'module M; grammar G { token TOP { "foo" }}; say "foo" ~~
/<M​::G​::TOP>/'
=> <foo>
M​::G​::TOP => <foo>

Otherwise it still errors out​:

$ ./perl6 -e 'module M; grammar G { token TOP { "foo" }}; say "foo" ~~
/<M​::G>/'
Method '!cursor_init' not found for invocant of class 'Any'
  in any find_method at src/gen/Metamodel.pm​:143
  in method OTHERGRAMMAR at src/gen/CORE.setting​:8309
  in regex <anon> at -e​:1
  in method ACCEPTS at src/gen/CORE.setting​:8344
  in <anon> at -e​:1
  in block <anon> at -e​:1

From @jnthn

On Fri Mar 30 07​:43​:39 2012, moritz wrote​:

It works now when explicitly calling a rule in that grammar​:

$ ./perl6 -e 'module M; grammar G { token TOP { "foo" }}; say "foo" ~~
/<M​::G​::TOP>/'
=> <foo>
M​::G​::TOP => <foo>

Otherwise it still errors out​:

$ ./perl6 -e 'module M; grammar G { token TOP { "foo" }}; say "foo" ~~
/<M​::G>/'
Method '!cursor_init' not found for invocant of class 'Any'
in any find_method at src/gen/Metamodel.pm​:143
in method OTHERGRAMMAR at src/gen/CORE.setting​:8309
in regex <anon> at -e​:1
in method ACCEPTS at src/gen/CORE.setting​:8344
in <anon> at -e​:1
in block <anon> at -e​:1

Tried to fix this, but then /<SomeGrammar/> should also work, but that turns out to be very fragile/confusing between rules and types. Also no support in S05 for this behavior (or even /<Some​::Grammar​::rule>/) so it needs some lang design input.

From @TimToady

Don't need this, using the Top or other rule name is sufficient.

@TimToady - Status changed from 'open' to 'rejected'