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rx.t
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rx.t
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use Test;
plan 729;
### for now
sub matchcheck { 1 }
# L<S05/Backtracking control/"To force the preceding atom to do no
# backtracking">
## Backtracking control tests
#### a* a bazaar y control
ok 'bazaar' ~~ /a* a/, 'control';
#### a*: a bazaar n basic
ok !('bazaar' ~~ /a*: a/), 'basic';
#### ^[a|b]* aba abbabbababba y control
ok 'abbabbababba' ~~ /^[a|b]* aba/, 'control';
#### ^[a|b]*: aba abbabbababba n outside a group
ok !('abbabbababba' ~~ /^[a|b]*: aba/), 'outside a group';
#### \d+: 123abc y cut on character class shortcut
ok '123abc' ~~ /\d+:/, 'cut on character class shortcut';
#### \d+: abc n cut on character class shortcut
ok 'abc' !~~ /\d+:/, 'cut on character class shortcut';
#### [ if not | ify ] verify y control
ok 'verify' ~~ /[ if not | ify ]/, 'control';
# L<S05/Backtracking control/"Backtracking over a double colon">
#### [ if :: not | ify ] verify n inside a group
ok 'verify' !~~ /[ if :: not | ify ]/, 'inside a group';
#### if :: not | ify verify n the default all group
ok 'verify' !~~ / if :: not | ify/, 'the default all group';
#### [ if : not | ify ] verify y simple backtrack still works
#?pugs todo 'feature'
ok 'verify' ~~ /[ if : not | ify ]/, 'simple backtrack still works';
#### [ if :: not | ify ] | verify verify y rule continues
#?pugs todo 'feature'
ok 'verify' ~~ /[ if :: not | ify ] | verify/, 'rule continues';
# L<S05/Backtracking control/"Backtracking over a triple colon">
#### [ when ever ] | whence whence y full backtrack failure
ok 'whence' ~~ /[ when ever ] | whence/, 'full backtrack failure';
#### [ when ::: ever ] | whence whence n full backtrack failure
ok 'whence' !~~ /[ when ::: ever ] | whence/, 'full backtrack failure';
#### ab::cd | gh::ij xyabghij y group cut at top
#?pugs todo 'feature'
ok 'xyabghij' ~~ /ab::cd | gh::ij/, 'group cut at top';
#### ab:::cd | gh:::ij xyabghij n rule cut at top
ok 'xyabghij' !~~ /ab:::cd | gh:::ij/, 'rule cut at top';
#### [ab::cd | gh::ij] xyabghij y group cut in group
#?pugs todo 'feature'
ok 'xyabghij' ~~ /[ab::cd | gh::ij]/, 'group cut in group';
#### [ab:::cd | gh:::ij] xyabghij n rule cut in group
ok 'xyabghij' !~~ /[ab:::cd | gh:::ij]/, 'rule cut in group';
#### [ ab | abc ]: de xyzabcde n no backtrack into group
ok 'xyzabcde' !~~ /[ ab | abc ]: de/, 'no backtrack into group';
#### ( ab | abc ): de xyzabcde n no backtrack into subpattern
ok 'xyzabcde' !~~ /( ab | abc ): de/, 'no backtrack into subpattern';
#### [ when <commit> ever ] | whence whence n full backtrack failure
#?pugs todo 'feature'
ok 'whence' !~~ /[ when <commit> ever ] | whence/, 'full backtrack failure';
#L<S05/Modifiers/"The new :ratchet modifier">
#### :ratchet a* a bazaar n ratchet modifier
ok 'bazaar' !~~ /:ratchet a* a/, 'ratchet modifier';
#### :ratchet a*! a bazaar y force backtracking !
ok 'bazaar' ~~ /:ratchet a*! a/, 'force backtracking !';
#L<S05/Unchanged syntactic features/"Capturing: (...)">
## captures
#### (a.)..(..) zzzabcdefzzz y basic match
ok 'zzzabcdefzzz' ~~ /(a.)..(..)/, 'basic match';
#### (a.)..(..) zzzabcdefzzz /mob: <abcdef @ 3>/ basic $0
ok ('zzzabcdefzzz' ~~ /(a.)..(..)/) && matchcheck($/, q/mob: <abcdef @ 3>/), 'basic $0';
#### (a.)..(..) zzzabcdefzzz /mob 0: <ab @ 3>/ basic $1
ok ('zzzabcdefzzz' ~~ /(a.)..(..)/) && matchcheck($/, q/mob 0: <ab @ 3>/), 'basic $1';
#### (a.)..(..) zzzabcdefzzz /mob 1: <ef @ 7>/ basic $2
ok ('zzzabcdefzzz' ~~ /(a.)..(..)/) && matchcheck($/, q/mob 1: <ef @ 7>/), 'basic $2';
#### (a(b(c))(d)) abcd y nested match
ok 'abcd' ~~ /(a(b(c))(d))/, 'nested match';
#### (a(b(c))(d)) abcd /mob: <abcd @ 0>/ nested match
ok ('abcd' ~~ /(a(b(c))(d))/) && matchcheck($/, q/mob: <abcd @ 0>/), 'nested match';
#### (a(b(c))(d)) abcd /mob 0: <abcd @ 0>/ nested match
ok ('abcd' ~~ /(a(b(c))(d))/) && matchcheck($/, q/mob 0: <abcd @ 0>/), 'nested match';
#### (a(b(c))(d)) abcd /mob 0 0: <bc @ 1>/ nested match
ok ('abcd' ~~ /(a(b(c))(d))/) && matchcheck($/, q/mob 0 0: <bc @ 1>/), 'nested match';
#### (a(b(c))(d)) abcd /mob 0 0 0: <c @ 2>/ nested match
ok ('abcd' ~~ /(a(b(c))(d))/) && matchcheck($/, q/mob 0 0 0: <c @ 2>/), 'nested match';
#### (a(b(c))(d)) abcd /mob 0 1: <d @ 3>/ nested match
ok ('abcd' ~~ /(a(b(c))(d))/) && matchcheck($/, q/mob 0 1: <d @ 3>/), 'nested match';
#### ((\w+)+) abcd /mob: <abcd @ 0>/ nested match
ok ('abcd' ~~ /((\w+)+)/) && matchcheck($/, q/mob: <abcd @ 0>/), 'nested match';
#### ((\w+)+) abcd /mob 0: <abcd @ 0>/ nested match
ok ('abcd' ~~ /((\w+)+)/) && matchcheck($/, q/mob 0: <abcd @ 0>/), 'nested match';
#### ((\w+)+) abcd /mob 0 0 0: <abcd @ 0>/ nested match
ok ('abcd' ~~ /((\w+)+)/) && matchcheck($/, q/mob 0 0 0: <abcd @ 0>/), 'nested match';
#### ((\w+)+) ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz /mob: <ABCD/ nested match
ok ('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' ~~ /((\w+)+)/) && matchcheck($/, q/mob: <ABCD/), 'nested match';
#### ((\w+)+) ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz /mob 0: <ABCD/ nested match
ok ('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' ~~ /((\w+)+)/) && matchcheck($/, q/mob 0: <ABCD/), 'nested match';
#### ((\w+)+) ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz /mob 0 0 0: <ABCD/ nested match
ok ('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' ~~ /((\w+)+)/) && matchcheck($/, q/mob 0 0 0: <ABCD/), 'nested match';
#### (a) [ (bc) (d) | .* (ef) ] .* (g) abcdefg /mob 0: <a @ 0>/ alt subpattern before group
ok ('abcdefg' ~~ /(a) [ (bc) (d) | .* (ef) ] .* (g)/) && matchcheck($/, q/mob 0: <a @ 0>/), 'alt subpattern before group';
#### (a) [ (bc) (d) | .* (ef) ] .* (g) abcdefg /mob 1: <bc @ 1>/ alt subpattern in group
ok ('abcdefg' ~~ /(a) [ (bc) (d) | .* (ef) ] .* (g)/) && matchcheck($/, q/mob 1: <bc @ 1>/), 'alt subpattern in group';
#### (a) [ (bc) (d) | .* (ef) ] .* (g) abcdefg /mob 2: <d @ 3>/ alt subpattern in group
ok ('abcdefg' ~~ /(a) [ (bc) (d) | .* (ef) ] .* (g)/) && matchcheck($/, q/mob 2: <d @ 3>/), 'alt subpattern in group';
#### (a) [ (bc) (d) | .* (ef) ] .* (g) abcdefg /mob 3: <g @ 6>/ alt subpattern after group
ok ('abcdefg' ~~ /(a) [ (bc) (d) | .* (ef) ] .* (g)/) && matchcheck($/, q/mob 3: <g @ 6>/), 'alt subpattern after group';
#### (a) [ (bc) (x) | .* (ef) ] .* (g) abcdefg /mob 1: <ef @ 4>/ 2nd alt subpattern in group
ok ('abcdefg' ~~ /(a) [ (bc) (x) | .* (ef) ] .* (g)/) && matchcheck($/, q/mob 1: <ef @ 4>/), '2nd alt subpattern in group';
#### (a) [ (bc) (x) | .* (ef) ] .* (g) abcdefg /mob 3: <g @ 6>/ 2nd alt subpattern after group
ok ('abcdefg' ~~ /(a) [ (bc) (x) | .* (ef) ] .* (g)/) && matchcheck($/, q/mob 3: <g @ 6>/), '2nd alt subpattern after group';
#### ( (.) )* abc /mob 0 1 0: <b @ 1>/ nested repeated captures
ok ('abc' ~~ /( (.) )*/) && matchcheck($/, q/mob 0 1 0: <b @ 1>/), 'nested repeated captures';
#### [ (.) ]* abc /mob 0 1: <b @ 1>/ nested repeated captures
ok ('abc' ~~ /[ (.) ]*/) && matchcheck($/, q/mob 0 1: <b @ 1>/), 'nested repeated captures';
#### ( [.] )* abc /mob 0 1: <b @ 1>/ nested repeated captures
ok ('abc' ~~ /( [.] )*/) && matchcheck($/, q/mob 0 1: <b @ 1>/), 'nested repeated captures';
#### (.) (.) $7=(.) (.) $4=(.) abcdefg /mob 0: <a @ 0>/ numbered aliases $1
ok ('abcdefg' ~~ /(.) (.) $7=(.) (.) $4=(.)/) && matchcheck($/, q/mob 0: <a @ 0>/), 'numbered aliases $1';
#### (.) (.) $7=(.) (.) $4=(.) abcdefg /mob 1: <b @ 1>/ numbered aliases $2
ok ('abcdefg' ~~ /(.) (.) $7=(.) (.) $4=(.)/) && matchcheck($/, q/mob 1: <b @ 1>/), 'numbered aliases $2';
#### (.) (.) $7=(.) (.) $4=(.) abcdefg /mob 7: <c @ 2>/ numbered aliases $7
ok ('abcdefg' ~~ /(.) (.) $7=(.) (.) $4=(.)/) && matchcheck($/, q/mob 7: <c @ 2>/), 'numbered aliases $7';
#### (.) (.) $7=(.) (.) $4=(.) abcdefg /mob 8: <d @ 3>/ numbered aliases $8
ok ('abcdefg' ~~ /(.) (.) $7=(.) (.) $4=(.)/) && matchcheck($/, q/mob 8: <d @ 3>/), 'numbered aliases $8';
#### (.) (.) $7=(.) (.) $4=(.) abcdefg /mob 4: <e @ 4>/ numbered aliases $4
ok ('abcdefg' ~~ /(.) (.) $7=(.) (.) $4=(.)/) && matchcheck($/, q/mob 4: <e @ 4>/), 'numbered aliases $4';
#### $1=[ (.) (.) (.) ] (.) abcdefg /mob 1: <abc @ 0>/ perl5 numbered captures $1
ok ('abcdefg' ~~ /$1=[ (.) (.) (.) ] (.)/) && matchcheck($/, q/mob 1: <abc @ 0>/), 'perl5 numbered captures $1';
#### $1=[ (.) (.) (.) ] (.) abcdefg /mob 2: <a @ 0>/ perl5 numbered captures $1
ok ('abcdefg' ~~ /$1=[ (.) (.) (.) ] (.)/) && matchcheck($/, q/mob 2: <a @ 0>/), 'perl5 numbered captures $1';
#### $1=[ (.) (.) (.) ] (.) abcdefg /mob 3: <b @ 1>/ perl5 numbered captures $1
ok ('abcdefg' ~~ /$1=[ (.) (.) (.) ] (.)/) && matchcheck($/, q/mob 3: <b @ 1>/), 'perl5 numbered captures $1';
#### $1=[ (.) (.) (.) ] (.) abcdefg /mob 4: <c @ 2>/ perl5 numbered captures $1
ok ('abcdefg' ~~ /$1=[ (.) (.) (.) ] (.)/) && matchcheck($/, q/mob 4: <c @ 2>/), 'perl5 numbered captures $1';
#### $1=[ (.) (.) (.) ] (.) abcdefg /mob 5: <d @ 3>/ perl5 numbered captures $1
ok ('abcdefg' ~~ /$1=[ (.) (.) (.) ] (.)/) && matchcheck($/, q/mob 5: <d @ 3>/), 'perl5 numbered captures $1';
#### :s $<key>=[\w+] \= $<val>=[\S+] abc = 123 /mob<key>: <abc @ 1>/ named capture
#?pugs todo 'feature'
ok (' abc = 123' ~~ /:s $<key>=[\w+] \= $<val>=[\S+]/) && matchcheck($/, q/mob<key>: <abc @ 1>/), 'named capture';
#### :s $<key>=[\w+] \= $<val>=[\S+] abc = 123 /mob<val>: <123 @ 7>/ named capture
#?pugs todo 'feature'
ok (' abc = 123' ~~ /:s $<key>=[\w+] \= $<val>=[\S+]/) && matchcheck($/, q/mob<val>: <123 @ 7>/), 'named capture';
#### :s (\w+) $<foo>=(\w+) (\w+) abc def ghi /mob<foo>: <def @ 4>/ mixing named and unnamed capture
#?pugs todo 'feature'
ok ('abc def ghi' ~~ /:s (\w+) $<foo>=(\w+) (\w+)/) && matchcheck($/, q/mob<foo>: <def @ 4>/), 'mixing named and unnamed capture';
#### :s (\w+) $<foo>=(\w+) (\w+) abc def ghi /mob 1: <ghi @ 8>/ mixing named and unnamed capture
#?pugs todo 'feature'
ok ('abc def ghi' ~~ /:s (\w+) $<foo>=(\w+) (\w+)/) && matchcheck($/, q/mob 1: <ghi @ 8>/), 'mixing named and unnamed capture';
#### <alpha> [ \- <alpha> ]? abc def ghi /mob<alpha> 0: <a @ 0>/ multiple subrule captures in same scope
#?pugs todo 'feature'
ok ('abc def ghi' ~~ /<alpha> [ \- <alpha> ]?/) && matchcheck($/, q/mob<alpha> 0: <a @ 0>/), 'multiple subrule captures in same scope';
#### [(.)$0]+ bookkeeper y backreference
#?pugs todo 'feature'
ok 'bookkeeper' ~~ /[(.)$0]+/, 'backreference';
#### (\w+) <+ws> $0 hello hello y backreference at end of string
#?pugs todo 'feature'
ok 'hello hello' ~~ /(\w+) <+ws> $0/, 'backreference at end of string';
#### [(.)$0]+ bookkeeper /mob 0 0: <o @ 1>/ backref $1
#?pugs todo 'feature'
ok ('bookkeeper' ~~ /[(.)$0]+/) && matchcheck($/, q/mob 0 0: <o @ 1>/), 'backref $1';
#### [(.)$0]+ bookkeeper /mob 0 1: <k @ 3>/ backref $1
#?pugs todo 'feature'
ok ('bookkeeper' ~~ /[(.)$0]+/) && matchcheck($/, q/mob 0 1: <k @ 3>/), 'backref $1';
#### [(.)$0]+ bookkeeper /mob 0 2: <e @ 5>/ backref $1
#?pugs todo 'feature'
ok ('bookkeeper' ~~ /[(.)$0]+/) && matchcheck($/, q/mob 0 2: <e @ 5>/), 'backref $1';
#### (.)*x 123x /mob: <123x @ 0>/ repeated dot capture
#?pugs todo 'feature'
ok ('123x' ~~ /(.)*x/) && matchcheck($/, q/mob: <123x @ 0>/), 'repeated dot capture';
#### $<key>=<alpha> 12ab34 /mob<key>: <a @ 2>/ alias capture
ok ('12ab34' ~~ /$<key>=<alpha>/) && matchcheck($/, q/mob<key>: <a @ 2>/), 'alias capture';
#### <key=alpha> 12ab34 /mob<key>: <a @ 2>/ alias capture
ok ('12ab34' ~~ /<key=alpha>/) && matchcheck($/, q/mob<key>: <a @ 2>/), 'alias capture';
# L<S05/Extensible metasyntax (C<< <...> >>)/"A leading [ indicates">
## Enumerated character lists
#### <[c]> abcdef y character class
ok 'abcdef' ~~ /<[c]>/, 'character class';
#### <[ z ]> abc def n character class ignores ws
#?pugs todo 'feature'
ok 'abc def' !~~ /<[ z ]>/, 'character class ignores ws';
#### <[dcb]>**{3} abcdef y repeated character class
#?pugs todo 'feature'
ok 'abcdef' ~~ /<[dcb]>**{3}/, 'repeated character class';
#### ^<[a]> abcdef y anchored character class
ok 'abcdef' ~~ /^<[a]>/, 'anchored character class';
# L<S05/Extensible metasyntax (C<< <...> >>)/"A leading - indicates">
#### <-[e]> abcdef y negated character class
ok 'abcdef' ~~ /<-[e]>/, 'negated character class';
#### ^<[a]>? abcdef y anchored optional character class
ok 'abcdef' ~~ /^<[a]>?/, 'anchored optional character class';
#### <-[e]>? abcdef y negated optional character class
ok 'abcdef' ~~ /<-[e]>?/, 'negated optional character class';
#### <-[dcb]>**{3} abcdef n repeated negated character class
ok 'abcdef' !~~ /<-[dcb]>**{3}/, 'repeated negated character class';
#### ^<-[e]> abcdef y anchored negated character class
ok 'abcdef' ~~ /^<-[e]>/, 'anchored negated character class';
#### ^<-[a]> abcdef n anchored negated character class
ok 'abcdef' !~~ /^<-[a]>/, 'anchored negated character class';
# L<S05/Extensible metasyntax (C<< <...> >>)/"Ranges in enumerated character classes">
#### <[b..d]> abcdef y character range
ok 'abcdef' ~~ /<[b..d]>/, 'character range';
#### <[b .. d]> c y character range ignores ws
#?pugs todo 'feature'
ok 'c' ~~ /<[b .. d]>/, 'character range ignores ws';
#### <[b..d]> abxxef y character range
ok 'abxxef' ~~ /<[b..d]>/, 'character range';
#### <[b..d]> axcxef y character range
ok 'axcxef' ~~ /<[b..d]>/, 'character range';
#### <[b..d]> axxdef y character range
ok 'axxdef' ~~ /<[b..d]>/, 'character range';
#### <[b..d]> axxxef n character range
ok 'axxxef' !~~ /<[b..d]>/, 'character range';
#### <-[b..d]> abcdef y negated character range
ok 'abcdef' ~~ /<-[b..d]>/, 'negated character range';
#### <- [b..d]> abcdef y negated allows ws
#?pugs todo 'feature'
ok 'abcdef' ~~ /<- [b..d]>/, 'negated allows ws';
#### <-[b..d]> bbccdd n negated character range
ok 'bbccdd' !~~ /<-[b..d]>/, 'negated character range';
# todo :pge<reversed character range>
#### <-[d..b]> bbccdd /parse error/ illegal character range
ok ('bbccdd' ~~ /<-[d..b]>/) && matchcheck($/, q/parse error/), 'illegal character range';
#### <[-]> ab-def /parse error/ unescaped hyphen
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'ab-def' ~~ /<[-]>/ }}) ~~ Failure also /parse error/, 'unescaped hyphen';
#### <[\-]> ab-def y escaped hyphen
ok 'ab-def' ~~ /<[\-]>/, 'escaped hyphen';
#### <[\-]> abcdef n escaped hyphen
ok 'abcdef' !~~ /<[\-]>/, 'escaped hyphen';
#### <-[\-]> ---x-- y negated escaped hyphen
ok '---x--' ~~ /<-[\-]>/, 'negated escaped hyphen';
#### <-[\-]> ------ n negated escaped hyphen
ok '------' !~~ /<-[\-]>/, 'negated escaped hyphen';
#### <[\-+]> ab-def y escaped hyphen in range
ok 'ab-def' ~~ /<[\-+]>/, 'escaped hyphen in range';
#### <[\-+]> ab+def y escaped hyphen in range
ok 'ab+def' ~~ /<[\-+]>/, 'escaped hyphen in range';
#### <[\-+]> abcdef n escaped hyphen in range
ok 'abcdef' !~~ /<[\-+]>/, 'escaped hyphen in range';
#### <[+\-]> ab-def y escaped hyphen in range
ok 'ab-def' ~~ /<[+\-]>/, 'escaped hyphen in range';
#### <[+\-]> ab+def y escaped hyphen in range
ok 'ab+def' ~~ /<[+\-]>/, 'escaped hyphen in range';
#### <[+\-]> abcdef n escaped hyphen in range
ok 'abcdef' !~~ /<[+\-]>/, 'escaped hyphen in range';
#### <-[\-+]> ---x-- y negated escaped hyphen in range
ok '---x--' ~~ /<-[\-+]>/, 'negated escaped hyphen in range';
#### <-[\-+]> ------ n negated escaped hyphen in range
ok '------' !~~ /<-[\-+]>/, 'negated escaped hyphen in range';
#### <-[+\-]> ---x-- y negated escaped hyphen in range
ok '---x--' ~~ /<-[+\-]>/, 'negated escaped hyphen in range';
#### <-[+\-]> ------ n negated escaped hyphen in range
ok '------' !~~ /<-[+\-]>/, 'negated escaped hyphen in range';
#### <["\\]> \\ y escaped backslash
ok '\\' ~~ /<["\\]>/, 'escaped backslash';
#### <[\]]> ] y escaped close bracket
ok ']' ~~ /<[\]]>/, 'escaped close bracket';
#### <[\]> \\]] /parse error/ unescaped backslash (or no closing brace)
#?rakudo skip 'infix:<also>'
ok eval(q{{ '\\]]' ~~ /<[\]>/ }}) ~~ Failure also /parse error/, 'unescaped backslash (or no closing brace)';
#### ^\><[<]> >< y lt character class
ok '><' ~~ /^\><[<]>/, 'lt character class';
#### ^<[>]>\< >< y gt character class
ok '><' ~~ /^<[>]>\</, 'gt character class';
#### ^<[><]>**{2} >< y gt, lt character class
#?pugs todo 'feature'
ok '><' ~~ /^<[><]>**{2}/, 'gt, lt character class';
#### ^<[<>]>**{2} >< y lt, gt character class
#?pugs todo 'feature'
ok '><' ~~ /^<[<>]>**{2}/, 'lt, gt character class';
#### ^<-[><]> >< n not gt, lt character class
ok '><' !~~ /^<-[><]>/, 'not gt, lt character class';
#### ^<-[<>]> >< n not lt, gt character class
ok '><' !~~ /^<-[<>]>/, 'not lt, gt character class';
#### '... --- ...' ... --- ... y literal match (\\\')
ok '... --- ...' ~~ /'... --- ...'/, 'literal match (\\\')';
#### '... --- ...' ...---... n literal match (\\\')
ok '...---...' !~~ /'... --- ...'/, 'literal match (\\\')';
#### 'ab\'>cd' ab\'>cd y literal match with quote
#?pugs todo 'feature'
ok 'ab\'>cd' ~~ /'ab\'>cd'/, 'literal match with quote';
#### 'ab\\yz' ab\x5cyz y literal match with backslash
#?rakudo todo 'unknown'
ok 'ab\x5cyz' ~~ /'ab\\yz'/, 'literal match with backslash';
#### 'ab"cd' ab"cd y literal match with quote
ok 'ab"cd' ~~ /'ab"cd'/, 'literal match with quote';
#### 'ab\\yz' ab\x5cyz y literal match with backslash
#?pugs todo 'feature'
#?rakudo skip 'parse error'
ok 'ab\x5cyz' ~~ /'ab\\yz'/, 'literal match with backslash';
#### "... --- ..." ... --- ... y literal match (\")
#?pugs todo 'feature'
#?rakudo skip 'parse error'
ok '... --- ...' ~~ /"... --- ..."/, 'literal match (\")';
#### "... --- ..." ...---... n literal match (\")
#?pugs todo 'feature'
#?rakudo skip 'parse error (RT #64880)'
ok '...---...' !~~ /"... --- ..."/, 'literal match (\")';
#### "ab<\">cd" ab<">cd y literal match with quote
#?pugs todo 'feature'
#?rakudo skip 'parse error (RT #64880)'
ok 'ab<">cd' ~~ /"ab<\">cd"/, 'literal match with quote';
#### "ab<'>cd" ab<\'>cd y literal match with quote
#?pugs todo 'feature'
#?rakudo skip 'parse error (RT #64880)'
ok 'ab<\'>cd' ~~ /"ab<'>cd"/, 'literal match with quote';
#?pugs todo 'feature'
#### "ab\\cd" ab\x5ccd y literal match with backslash
#?rakudo skip 'parse error (RT #64880)'
ok 'ab\x5ccd' ~~ /"ab\\cd"/, 'literal match with backslash';
#### (ab)x"$0" abxab y literal match with interpolation
#?pugs todo 'feature'
#?rakudo skip 'parse error (RT #64880)'
ok 'abxab' ~~ /(ab)x"$0"/, 'literal match with interpolation';
#### (ab)"x$0" abxab y literal match with interpolation
#?pugs todo 'feature'
#?rakudo skip 'parse error (RT #64880)'
ok 'abxab' ~~ /(ab)"x$0"/, 'literal match with interpolation';
# L<S05/Extensible metasyntax (C<< <...> >>)/"A leading ? indicates">
#
#### '?' ab<? y literal match with question mark
ok 'ab<?' ~~ /'?'/, 'literal match with question mark';
#### '<' ab<? y literal match with lt
ok 'ab<?' ~~ /'<'/, 'literal match with lt ';
#### '<?' ab<? y literal match with lt and question mark
ok 'ab<?' ~~ /'<?'/, 'literal match with lt and question mark';
#### '<?' ab<x? n non-matching literal match
ok 'ab<x?' !~~ /'<?'/, 'non-matching literal match ';
#### <[A..Z0..9]> abcdef n two enumerated ranges
ok 'abcdef' !~~ /<[A..Z0..9]>/, 'two enumerated ranges';
#### <[A..Z0..9]> abcDef y two enumerated ranges
ok 'abcDef' ~~ /<[A..Z0..9]>/, 'two enumerated ranges';
# L<S05/Extensible metasyntax (C<< <...> >>)/"The special named assertions">
#
## lookarounds
#### <before .d> a. abacad /mob: <ad @ 4>/ lookahead <before>
ok ('abacad' ~~ /<before .d> a./) && matchcheck($/, q/mob: <ad @ 4>/), 'lookahead <before>';
#### <before c> .... abacad n lookahead <before>
ok 'abacad' !~~ /<before c> ..../, 'lookahead <before>';
#### <before> . abcd n null <before>
ok 'abcd' !~~ /<before> ./, 'null <before>';
#### <!before ..b> aa aabaaa /mob: <aa @ 3>/ negated lookahead
ok ('aabaaa' ~~ /<!before ..b> aa/) && matchcheck($/, q/mob: <aa @ 3>/), 'negated lookahead';
#### <after a>b ab y lookbehind <after>
#?pugs todo 'feature'
ok 'ab' ~~ /<after a>b/, 'lookbehind <after>';
#### <after a>b cb n lookbehind <after>
ok 'cb' !~~ /<after a>b/, 'lookbehind <after>';
#### <after a>b b n lookbehind <after>
ok 'b' !~~ /<after a>b/, 'lookbehind <after>';
#### <!after c>b ab y lookbehind <!after>
#?pugs todo 'feature'
ok 'ab' ~~ /<!after c>b/, 'lookbehind <!after>';
#### <!after c>b cb n lookbehind <!after>
ok 'cb' !~~ /<!after c>b/, 'lookbehind <!after>';
#### <!after c>b b y lookbehind <!after>
#?pugs todo 'feature'
ok 'b' ~~ /<!after c>b/, 'lookbehind <!after>';
#### <!after <[cd]>>b dbcb n lookbehind <!after>
ok 'dbcb' !~~ /<!after <[cd]>>b/, 'lookbehind <!after>';
#### <!after <[cd]>><[ab]> dbaacb y lookbehind <!after>
#?pugs todo 'feature'
ok 'dbaacb' ~~ /<!after <[cd]>><[ab]>/, 'lookbehind <!after>';
#### <!after c|d>b dbcb n lookbehind <!after>
ok 'dbcb' !~~ /<!after c|d>b/, 'lookbehind <!after>';
#### <!after c|d><[ab]> dbaacb y lookbehind <!after>
#?pugs todo 'feature'
ok 'dbaacb' ~~ /<!after c|d><[ab]>/, 'lookbehind <!after>';
#### <!after cd><[ab]> cbaccb y lookbehind <!after>
#?pugs todo 'feature'
ok 'cbaccb' ~~ /<!after cd><[ab]>/, 'lookbehind <!after>';
#### $ <after ^a> a y lookbehind <after>
#?pugs todo 'feature'
ok 'a' ~~ /$ <after ^a>/, 'lookbehind <after>';
#### <after x+>y axxbxxyc y lookbehind <after>
#?pugs todo 'feature'
ok 'axxbxxyc' ~~ /<after x+>y/, 'lookbehind <after>';
# L<S05/Extensible metasyntax (C<< <...> >>)/"A leading + may also">
#### <[a..z]>+ az y metasyntax with leading + (<+...>)
ok 'az' ~~ /<[a..z]>+/, 'metasyntax with leading + (<+...>)';
#### <+[a..z]>+ az y metasyntax with leading + (<+...>)
ok 'az' ~~ /<+[a..z]>+/, 'metasyntax with leading + (<+...>)';
#### <+alpha>+ az y metasyntax with leading + (<+...>)
ok 'az' ~~ /<+alpha>+/, 'metasyntax with leading + (<+...>)';
#### a[b} \t\n\r !"#$%&\'()*+,-./:;<=>?@[\]^`_{|}0123456789ABCDEFGHIJabcdefghij /rule error/ mismatched close
#?rakudo skip 'infix:<also>'
ok eval(q{{ '\t\n\r !"#$%&\'()*+,-./:;<=>?@[\]^`_{|}0123456789ABCDEFGHIJabcdefghij' ~~ /a[b}/ }}) ~~ Failure also /rule error/, 'mismatched close';
#### c <before .d> abacad /mob: <c @ 3>/ one character and lookahead <before>
ok ('abacad' ~~ /c <before .d>/) && matchcheck($/, q/mob: <c @ 3>/), 'one character and lookahead <before>';
#### .* <before .d> abacad /mob: <abac @ 0>/ multiple characters and lookahead <before>
ok ('abacad' ~~ /.* <before .d>/) && matchcheck($/, q/mob: <abac @ 0>/), 'multiple characters and lookahead <before>';
#### .* <before .\<> abaca<d /mob: <abac @ 0>/ multiple characters and lookahead <before> with a \'<\'
ok ('abaca<d' ~~ /.* <before .\<>/) && matchcheck($/, q/mob: <abac @ 0>/), 'multiple characters and lookahead <before> with a \'<\'';
#### .* <before \<> aba<ca<d /mob: <aba<ca @ 0>/ greedy any character and lookahead <before> with a \'<\'
ok ('aba<ca<d' ~~ /.* <before \<>/) && matchcheck($/, q/mob: <aba<ca @ 0>/), 'greedy any character and lookahead <before> with a \'<\'';
#### .*? <before \<> aba<ca<d /mob: <aba @ 0>/ non-greedy any character and lookahead <before> with a \'<\'
ok ('aba<ca<d' ~~ /.*? <before \<>/) && matchcheck($/, q/mob: <aba @ 0>/), 'non-greedy any character and lookahead <before> with a \'<\'';
## Metacharacter tests
#### . a y dot (.)
ok 'a' ~~ /./, 'dot (.)';
#### . \n y dot (.)
ok '\n' ~~ /./, 'dot (.)';
#### . '' n dot (.)
ok '' !~~ /./, 'dot (.)';
#### a\s+f abcdef n whitespace (\s)
ok 'abcdef' !~~ /a\s+f/, 'whitespace (\s)';
#### ab\s+cdef ab cdef y whitespace (\s)
ok 'ab cdef' ~~ /ab\s+cdef/, 'whitespace (\s)';
#### a\S+f abcdef y not whitespace (\S)
ok 'abcdef' ~~ /a\S+f/, 'not whitespace (\S)';
#### a\S+f ab cdef n not whitespace (\S)
ok 'ab cdef' !~~ /a\S+f/, 'not whitespace (\S)';
#### ^ abc abcdef y start and end of string (^)
ok 'abcdef' ~~ /^ abc/, 'start and end of string (^)';
#### ^ abc abc\ndef y start and end of string (^)
ok "abc\ndef" ~~ /^ abc/, 'start and end of string (^)';
#### ^ abc def\nabc n start and end of string (^)
ok "def\nabc" !~~ /^ abc/, 'start and end of string (^)';
#### def \n ^ abc def\nabc n start and end of string (^)
ok "def\nabc" !~~ /def \n ^ abc/, 'start and end of string (^)';
#### def $ abcdef y start and end of string ($)
ok 'abcdef' ~~ /def $/, 'start and end of string ($)';
#### def $ abc\ndef y start and end of string ($)
ok "abc\ndef" ~~ /def $/, 'start and end of string ($)';
#### def $ def\nabc n start and end of string ($)
ok "def\nabc" !~~ /def $/, 'start and end of string ($)';
#### def $ \n abc def\nabc n start and end of string (^)
ok "def\nabc" !~~ /def $ \n abc/, 'start and end of string (^)';
#### abc \n $ abc\n y end of string ($)
ok "abc\n" ~~ /abc \n $/, 'end of string ($)';
#### abc $ abc\n n end of string ($)
ok "abc\n" !~~ /abc $/, 'end of string ($)';
#### <<def abc-def y left word boundary, beginning of word
ok 'abc-def' ~~ /<<def/, 'left word boundary, beginning of word';
#### <<bc abc-def n left word boundary, mid-word
ok 'abc-def' !~~ /<<bc/, 'left word boundary, mid-word';
#### c<< abc-def n left word boundary, end of word
ok 'abc-def' !~~ /c<</, 'left word boundary, end of word';
#### <<abc abc-def y left word boundary, BOS
ok 'abc-def' ~~ /<<abc/, 'left word boundary, BOS';
#### def<< abc-def n left word boundary, EOS
ok 'abc-def' !~~ /def<</, 'left word boundary, EOS';
#### << ------- n left word boundary, no word chars
ok '-------' !~~ /<</, 'left word boundary, no word chars';
#### >>def abc-def n right word boundary, beginning of word
ok 'abc-def' !~~ />>def/, 'right word boundary, beginning of word';
#### >>bc abc-def n right word boundary, mid-word
ok 'abc-def' !~~ />>bc/, 'right word boundary, mid-word';
#### c>> abc-def y right word boundary, end of word
ok 'abc-def' ~~ /c>>/, 'right word boundary, end of word';
#### >>abc abc-def n right word boundary, BOS
ok 'abc-def' !~~ />>abc/, 'right word boundary, BOS';
#### def>> abc-def y right word boundary, EOS
ok 'abc-def' ~~ /def>>/, 'right word boundary, EOS';
#### >> ------- n right word boundary, no word chars
ok '-------' !~~ />>/, 'right word boundary, no word chars';
#### c \n d abc\ndef y logical newline (\n)
ok "abc\ndef" ~~ /c \n d/, 'logical newline (\n)';
#### c \n d abc\rdef y logical newline matches \r
#?pugs todo 'feature'
ok "abc\rdef" ~~ /c \n d/, 'logical newline matches \r';
#### c \n+ d abc\n\ndef y logical newline quantified
ok "abc\n\ndef" ~~ /c \n+ d/, 'logical newline quantified';
#### a\n+f abcdef n logical newline (\n)
ok 'abcdef' !~~ /a\n+f/, 'logical newline (\n)';
#### c \n d abc\n\rdef n logical newline matches \n\r
ok "abc\n\rdef" !~~ /c \n d/, 'logical newline matches \n\r';
#### c \n d abc\r\ndef y logical newline matches \r\n
#?pugs todo 'feature'
ok "abc\r\ndef" ~~ /c \n d/, 'logical newline matches \r\n';
#### b \n c abc\ndef n logical newline (\n)
ok "abc\ndef" !~~ /b \n c/, 'logical newline (\n)';
#### \N a y not logical newline (\N)
ok 'a' ~~ /\N/, 'not logical newline (\N)';
#### a \N c abc y not logical newline (\N)
ok 'abc' ~~ /a \N c/, 'not logical newline (\N)';
#### \N '' n not logical newline (\N)
ok '' !~~ /\N/, 'not logical newline (\N)';
#### c \N d abc\ndef n not logical newline (\N)
ok "abc\ndef" !~~ /c \N d/, 'not logical newline (\N)';
#### c \N d abc\rdef n not logical newline (\N)
ok "abc\rdef" !~~ /c \N d/, 'not logical newline (\N)';
#### c \N+ d abc\n\ndef n not logical newline (\N)
ok "abc\n\ndef" !~~ /c \N+ d/, 'not logical newline (\N)';
#### a\N+f abcdef y not logical newline (\N)
ok 'abcdef' ~~ /a\N+f/, 'not logical newline (\N)';
#### c \N d abc\n\rdef n not logical newline (\N)
ok "abc\n\rdef" !~~ /c \N d/, 'not logical newline (\N)';
#### c \N d abc\r\ndef n not logical newline (\N)
ok "abc\r\ndef" !~~ /c \N d/, 'not logical newline (\N)';
#### b \N \n abc\ndef y not logical newline (\N)
ok "abc\ndef" ~~ /b \N \n/, 'not logical newline (\N)';
#### \Aabc Aabc /reserved/ retired metachars (\A)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'Aabc' ~~ /\Aabc/ }}) ~~ Failure also /reserved/, 'retired metachars (\A)';
#### \Aabc abc\ndef /reserved/ retired metachars (\A)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'abc\ndef' ~~ /\Aabc/ }}) ~~ Failure also /reserved/, 'retired metachars (\A)';
#### abc\Z abcZ /reserved/ retired metachars (\Z)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'abcZ' ~~ /abc\Z/ }}) ~~ Failure also /reserved/, 'retired metachars (\Z)';
#### abc\Z abc\ndef /reserved/ retired metachars (\Z)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'abc\ndef' ~~ /abc\Z/ }}) ~~ Failure also /reserved/, 'retired metachars (\Z)';
#### abc\z abcz /reserved/ retired metachars (\z)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'abcz' ~~ /abc\z/ }}) ~~ Failure also /reserved/, 'retired metachars (\z)';
#### def\z abc\ndef /reserved/ retired metachars (\z)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'abc\ndef' ~~ /def\z/ }}) ~~ Failure also /reserved/, 'retired metachars (\z)';
#### abc # def abc#def y comments (#)
ok 'abc#def' ~~ /abc # def
/, 'comments (#)';
#### abc # xyz abc#def y comments (#)
ok 'abc#def' ~~ /abc # xyz
/, 'comments (#)';
#### abc # def \n \$ abc#def y comments (#)
ok 'abc#def' ~~ /abc # def \n \$
/, 'comments (#)';
#### abc '#' def abc#def y comments (#)
ok 'abc#def' ~~ /abc '#' def
/, 'comments (#)';
#### abc '#' xyz abc#def n comments (#)
ok 'abc#def' !~~ /abc '#' xyz
/, 'comments (#)';
#### ^ abc '#' def $ abc#def y comments (#)
ok 'abc#def' ~~ /^ abc '#' def $
/, 'comments (#)';
#### ^^ abc \n ^^ def abc\ndef y line beginnings and endings (^^)
ok "abc\ndef" ~~ /^^ abc \n ^^ def/, 'line beginnings and endings (^^)';
#### ^^ abc \n ^^ def \n ^^ abc\ndef\n n line beginnings and endings (^^)
#?pugs todo 'feature'
ok "abc\ndef\n" !~~ /^^ abc \n ^^ def \n ^^/, 'line beginnings and endings (^^)';
#### ^^ \n \n y line beginnings and endings (^^)
ok "\n" ~~ /^^ \n/, 'line beginnings and endings (^^)';
#### \n ^^ \n n line beginnings and endings (^^)
#?pugs todo 'feature'
ok "\n" !~~ /\n ^^/, 'line beginnings and endings (^^)';
#### abc $$ \n def $$ abc\ndef y line beginnings and endings ($$)
ok "abc\ndef" ~~ /abc $$ \n def $$/, 'line beginnings and endings ($$)';
#### abc $$ \n def $$ \n $$ abc\ndef\n n line beginnings and endings ($$)
#?pugs todo 'feature'
ok "abc\ndef\n" !~~ /abc $$ \n def $$ \n $$/, 'line beginnings and endings ($$)';
#### $$ \n \n y line beginnings and endings ($$)
ok "\n" ~~ /$$ \n/, 'line beginnings and endings ($$)';
#### \n $$ \n n line beginnings and endings ($$)
#?pugs todo 'feature'
ok "\n" !~~ /\n $$/, 'line beginnings and endings ($$)';
#### <[a..d]> | <[b..e]> c y alternation (|)
ok 'c' ~~ /<[a..d]> | <[b..e]>/, 'alternation (|)';
#### <[a..d]> | <[d..e]> c y alternation (|)
ok 'c' ~~ /<[a..d]> | <[d..e]>/, 'alternation (|)';
#### <[a..b]> | <[b..e]> c y alternation (|)
ok 'c' ~~ /<[a..b]> | <[b..e]>/, 'alternation (|)';
#### <[a..b]> | <[d..e]> c n alternation (|)
ok 'c' !~~ /<[a..b]> | <[d..e]>/, 'alternation (|)';
#### <[a..d]>+ | <[b..e]>+ bcd y alternation (|)
ok 'bcd' ~~ /<[a..d]>+ | <[b..e]>+/, 'alternation (|)';
#### ^ [ <[a..d]>+ | <[b..e]>+ ] $ bcd y alternation (|)
ok 'bcd' ~~ /^ [ <[a..d]>+ | <[b..e]>+ ] $/, 'alternation (|)';
#### ^ [ <[a..c]>+ | <[b..e]>+ ] $ bcd y alternation (|)
ok 'bcd' ~~ /^ [ <[a..c]>+ | <[b..e]>+ ] $/, 'alternation (|)';
#### ^ [ <[a..d]>+ | <[c..e]>+ ] $ bcd y alternation (|)
ok 'bcd' ~~ /^ [ <[a..d]>+ | <[c..e]>+ ] $/, 'alternation (|)';
#### b| bcd /rule error/ alternation (|) - null right arg illegal
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'bcd' ~~ /b|/ }}) ~~ Failure also /rule error/, 'alternation (|) - null right arg illegal';
#### |b bcd y alternation (|) - null left arg ignored
ok 'bcd' ~~ /|b/, 'alternation (|) - null left arg ignored';
#### | bcd /rule error/ alternation (|) - null both args illegal
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'bcd' ~~ /|/ }}) ~~ Failure also /rule error/, 'alternation (|) - null both args illegal';
#### \| | y alternation (|) - literal must be escaped
ok '|' ~~ /\|/, 'alternation (|) - literal must be escaped';
#### | | /rule error/ alternation (|) - literal must be escaped
#?rakudo skip 'infix:<also>'
ok eval(q{{ '|' ~~ /|/ }}) ~~ Failure also /rule error/, 'alternation (|) - literal must be escaped';
#### <[a..d]> & <[b..e]> c y conjunction (&)
#?pugs todo 'feature'
ok 'c' ~~ /<[a..d]> & <[b..e]>/, 'conjunction (&)';
#### <[a..d]> & <[d..e]> c n conjunction (&)
ok 'c' !~~ /<[a..d]> & <[d..e]>/, 'conjunction (&)';
#### <[a..b]> & <[b..e]> c n conjunction (&)
ok 'c' !~~ /<[a..b]> & <[b..e]>/, 'conjunction (&)';
#### <[a..b]> & <[d..e]> c n conjunction (&)
ok 'c' !~~ /<[a..b]> & <[d..e]>/, 'conjunction (&)';
#### <[a..d]>+ & <[b..e]>+ bcd y conjunction (&)
#?pugs todo 'feature'
ok 'bcd' ~~ /<[a..d]>+ & <[b..e]>+/, 'conjunction (&)';
#### ^ [ <[a..d]>+ & <[b..e]>+ ] $ bcd y conjunction (&)
#?pugs todo 'feature'
ok 'bcd' ~~ /^ [ <[a..d]>+ & <[b..e]>+ ] $/, 'conjunction (&)';
#### <[a..c]>+ & <[b..e]>+ bcd y conjunction (&)
#?pugs todo 'feature'
ok 'bcd' ~~ /<[a..c]>+ & <[b..e]>+/, 'conjunction (&)';
#### <[a..d]>+ & <[c..e]>+ bcd y conjunction (&)
#?pugs todo 'feature'
ok 'bcd' ~~ /<[a..d]>+ & <[c..e]>+/, 'conjunction (&)';
#### b& bcd /rule error/ conjunction (&) - null right arg illegal
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'bcd' ~~ /b&/ }}) ~~ Failure also /rule error/, 'conjunction (&) - null right arg illegal';
#### &b bcd /rule error/ conjunction (&) - null left arg illegal
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'bcd' ~~ /&b/ }}) ~~ Failure also /rule error/, 'conjunction (&) - null left arg illegal';
#### & bcd /rule error/ conjunction (&) - null both args illegal
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'bcd' ~~ /&/ }}) ~~ Failure also /rule error/, 'conjunction (&) - null both args illegal';
#### \& & y conjunction (&) - literal must be escaped
ok '&' ~~ /\&/, 'conjunction (&) - literal must be escaped';
#### & & /rule error/ conjunction (&) - literal must be escaped
#?rakudo skip 'infix:<also>'
ok eval(q{{ '&' ~~ /&/ }}) ~~ Failure also /rule error/, 'conjunction (&) - literal must be escaped';
# todo :pge<leading |>
#### a&|b a&|b /rule error/ alternation and conjunction (&|) - parse error
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'a&|b' ~~ /a&|b/ }}) ~~ Failure also /rule error/, 'alternation and conjunction (&|) - parse error';
#### a|&b a|&b /rule error/ alternation and conjunction (|&) - parse error
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'a|&b' ~~ /a|&b/ }}) ~~ Failure also /rule error/, 'alternation and conjunction (|&) - parse error';
#### |d|b abc y leading alternation ignored
ok 'abc' ~~ /|d|b/, 'leading alternation ignored';
#### |d|b abc y leading alternation ignored
ok 'abc' ~~ / |d|b/, 'leading alternation ignored';
#### |d |b abc y leading alternation ignored
ok 'abc' ~~ /|d |b/, 'leading alternation ignored';
#### | d | b abc y leading alternation ignored
ok 'abc' ~~ / | d | b/, 'leading alternation ignored';
#### b | | d abc n null pattern invalid
#?pugs todo 'feature'
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'abc' !~~ / b | | d/ }}) ~~ Failure also /reserved/, 'null pattern invalid';
#### \pabc pabc /reserved/ retired metachars (\p)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'pabc' ~~ /\pabc/ }}) ~~ Failure also /reserved/, 'retired metachars (\p)';
#### \p{InConsonant} a /reserved/ retired metachars (\p)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'a' ~~ /\p{InConsonant}/ }}) ~~ Failure also /reserved/, 'retired metachars (\p)';
#### \Pabc Pabc /reserved/ retired metachars (\P)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'Pabc' ~~ /\Pabc/ }}) ~~ Failure also /reserved/, 'retired metachars (\P)';
#### \P{InConsonant} a /reserved/ retired metachars (\P)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'a' ~~ /\P{InConsonant}/ }}) ~~ Failure also /reserved/, 'retired metachars (\P)';
#### \Labc\E LabcE /reserved/ retired metachars (\L...\E)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'LabcE' ~~ /\Labc\E/ }}) ~~ Failure also /reserved/, 'retired metachars (\L...\E)';
#### \LABC\E abc /reserved/ retired metachars (\L...\E)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'abc' ~~ /\LABC\E/ }}) ~~ Failure also /reserved/, 'retired metachars (\L...\E)';
#### \Uabc\E UabcE /reserved/ retired metachars (\U...\E)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'UabcE' ~~ /\Uabc\E/ }}) ~~ Failure also /reserved/, 'retired metachars (\U...\E)';
#### \Uabc\E ABC /reserved/ retired metachars (\U...\E)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'ABC' ~~ /\Uabc\E/ }}) ~~ Failure also /reserved/, 'retired metachars (\U...\E)';
#### \Qabc\E QabcE /reserved/ retired metachars (\Q...\E)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'QabcE' ~~ /\Qabc\E/ }}) ~~ Failure also /reserved/, 'retired metachars (\Q...\E)';
#### \Qabc d?\E abc d /reserved/ retired metachars (\Q...\E)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'abc d' ~~ /\Qabc d?\E/ }}) ~~ Failure also /reserved/, 'retired metachars (\Q...\E)';
#### \Gabc Gabc /reserved/ retired metachars (\G)
#?rakudo skip 'infix:<also>'
ok eval(q{{ 'Gabc' ~~ /\Gabc/ }}) ~~ Failure also /reserved/, 'retired metachars (\G)';
#### \1abc 1abc /reserved/ retired metachars (\1)
#?rakudo skip 'infix:<also>'
ok eval(q{{ '1abc' ~~ /\1abc/ }}) ~~ Failure also /reserved/, 'retired metachars (\1)';
#### ^ \s+ $ \x0009\x0020\x00a0\x000a\x000b\x000c\x000d\x0085 y 0-255 whitespace (\s)
#?pugs todo 'feature'
ok "\x0009\x0020\x00a0\x000a\x000b\x000c\x000d\x0085" ~~ /^ \s+ $/, '0-255 whitespace (\s)';
#### ^ \h+ $ \x0009\x0020\x00a0 y 0-255 horizontal whitespace (\h)
#?pugs todo 'feature'
ok "\x0009\x0020\x00a0" ~~ /^ \h+ $/, '0-255 horizontal whitespace (\h)';
#### ^ \V+ $ \x0009\x0020\x00a0 y 0-255 horizontal whitespace (\V)
ok "\x0009\x0020\x00a0" ~~ /^ \V+ $/, '0-255 horizontal whitespace (\V)';
#### ^ \v+ $ \x000a\x000b\x000c\x000d\x0085 y 0-255 vertical whitespace (\v)
#?pugs todo 'feature'
ok "\x000a\x000b\x000c\x000d\x0085" ~~ /^ \v+ $/, '0-255 vertical whitespace (\v)';
#### ^ \h+ $ \x000a\x000b\x000c\x000d\x0085 n 0-255 horizontal whitespace (\h)
ok "\x000a\x000b\x000c\x000d\x0085" !~~ /^ \h+ $/, '0-255 horizontal whitespace (\h)';
#### ^ \v+ $ \x0009\x0020\x00a0 n 0-255 vertical whitespace (\v)
ok "\x0009\x0020\x00a0" !~~ /^ \v+ $/, '0-255 vertical whitespace (\v)';
#### ^ \s+ $ \x1680\x180e\x2000\x2001\x2002\x2003\x2004\x2005\x2006\x2007\x2008\x2008\x2009\x200a\x202f\x205f\x3000 y unicode whitespace (\s)
#?pugs todo 'feature'
ok "\x1680\x180e\x2000\x2001\x2002\x2003\x2004\x2005\x2006\x2007\x2008\x2008\x2009\x200a\x202f\x205f\x3000" ~~ /^ \s+ $/, 'unicode whitespace (\s)';
#### ^ \h+ $ \x1680\x180e\x2000\x2001\x2002\x2003\x2004\x2005\x2006\x2007\x2008\x2008\x2009\x200a\x202f\x205f\x3000 y unicode whitespace (\h)
#?pugs todo 'feature'
ok "\x1680\x180e\x2000\x2001\x2002\x2003\x2004\x2005\x2006\x2007\x2008\x2008\x2009\x200a\x202f\x205f\x3000" ~~ /^ \h+ $/, 'unicode whitespace (\h)';
#### ^ \V+ $ \x1680\x180e\x2000\x2001\x2002\x2003\x2004\x2005\x2006\x2007\x2008\x2008\x2009\x200a\x202f\x205f\x3000 y unicode whitespace (\V)
ok "\x1680\x180e\x2000\x2001\x2002\x2003\x2004\x2005\x2006\x2007\x2008\x2008\x2009\x200a\x202f\x205f\x3000" ~~ /^ \V+ $/, 'unicode whitespace (\V)';
#### ^ \v+ $ \x1680\x180e\x2000\x2001\x2002\x2003\x2004\x2005\x2006\x2007\x2008\x2008\x2009\x200a\x202f\x205f\x3000 n unicode whitespace (\v)
ok "\x1680\x180e\x2000\x2001\x2002\x2003\x2004\x2005\x2006\x2007\x2008\x2008\x2009\x200a\x202f\x205f\x3000" !~~ /^ \v+ $/, 'unicode whitespace (\v)';
#### c \t d abc\tdef y horizontal tab (\t)
ok "abc\tdef" ~~ /c \t d/, 'horizontal tab (\t)';
#### c \t+ d abc\t\tdef y horizontal tab (\t)
ok "abc\t\tdef" ~~ /c \t+ d/, 'horizontal tab (\t)';
#### a \t+ f abcdef n horizontal tab (\t)
ok 'abcdef' !~~ /a \t+ f/, 'horizontal tab (\t)';
#### b \t c abc\tdef n horizontal tab (\t)
ok "abc\tdef" !~~ /b \t c/, 'horizontal tab (\t)';
#### \T a y not horizontal tab (\T)
ok 'a' ~~ /\T/, 'not horizontal tab (\T)';
#### a \T c abc y not horizontal tab (\T)
ok 'abc' ~~ /a \T c/, 'not horizontal tab (\T)';