use MONKEY-TYPING;

use Test;

plan 8;

# L<S05/Syntactic categories/>

# https://github.com/Raku/old-issue-tracker/issues/4579

#?rakudo skip "RT #126142 - NYI"

{

augment slang Regex {

token backslash:sym<Y> { YY };

}

throws-like '/foo \y/', Exception,

'can not compile regex with unknown backslash rule';

eval-lives-ok '/fuu \Y/', 'can compile a regex with new backslash rule';

ok 'YY' ~~ /^\Y$/, 'can use that rule (positive)';

ok 'yX' !~~ /^\Y$/, 'can use that rule (negative)';

}

# https://github.com/Raku/old-issue-tracker/issues/4579

#?rakudo skip "RT #126142 - NYI"

throws-like '/\Y/', Exception, 'backslash rules are lexically scoped';

# https://github.com/Raku/old-issue-tracker/issues/4579

#?rakudo skip "RT #126142 - NYI"

{

# nothing in the spec says that backslash rules need to be one char

# only, and we have LTM after all

# I feel so evil today... ;-)

augment slang Regex {

token backslash:<moep> { 'Hax' };

}

eval-lives-ok '/\moep/', 'can compile regex with multi char backslash rule';

ok 'Haxe' ~~ m/^\moep/, '... it matches';

ok 'Haxe' ~~ m/^\moepe$/, '... with correct end of escape sequence';

}

# vim: expandtab shiftwidth=4