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use v6;
use Test;
plan 154;
# L<S05/Substitution/>
my $str = 'hello';
is $str.subst(/h/,'f'), 'fello', 'We can use subst';
is $str, 'hello', '.. withouth side effect';
is $str.subst('h','f'), 'fello', '.. or using Str as pattern';
is $str.subst('.','f'), 'hello', '.. with literal string matching';
my $i=0;
is $str.subst(/l/,{$i++}), 'he0lo', 'We can have a closure as replacement';
is $str.=subst(/l/,'i'), 'heilo', '.. and with the .= modifier';
is $str, 'heilo', '.. it changes the receiver';
is 'hello'.subst('e', 3), 'h3llo', 'non-Str replacement works for string form too';
# not sure about this. Maybe '$1$0' should work.
$/ = ['nope'];
is 'a'.subst(/(.)/,"$0"), 'nope', '.. bare strings cannot see $/ because they are evaluated first';
is 'a'.subst(/(.)/,{$0~$0}),'aa', '.. you must wrap it in a closure to delay evaluation';
is '12'.subst(/(.)(.)/,{$()*2}),'24', '.. and do nifty things in closures';
# RT #116224
#?niecza skip "Cannot assign to \$/"
{
$/ = ('-'); # parens to avoid looking like a P5 irs directive
is 'a'.subst("a","b"), 'b', '"a".subst("a", "b") is "b"';
is $/, '-', '$/ is left untouched';
is 'a'.subst(/a/,"b"), 'b', '"a".subst(/a/, "b") is "b"';
is $/, 'a', '$/ matched "a"';
is 'a'.subst(/x/,"y"), 'a', '"a".subst(/x/, "y") is "a"';
nok $/, '$/ is a falsey';
$_ = 'a';
is s/a/b/, 'a', '$_ = "a"; s/a/b/ is "a"';
is $/, 'a', '$/ matched "a"';
$_ = 'a';
nok s/x/y/, '$_ = "a"; s/x/y/ is a falsey';
nok $/, '$/ is a falsey';
}
{
is 'a b c d'.subst(/\w/, 'x', :g), 'x x x x', '.subst and :g';
is 'a b c d'.subst(/\w/, 'x', :global), 'x x x x', '.subst and :global';
is 'a b c d'.subst(/\w/, 'x', :x(0)), 'a b c d', '.subst and :x(0)';
is 'a b c d'.subst(/\w/, 'x', :x(1)), 'x b c d', '.subst and :x(1)';
is 'a b c d'.subst(/\w/, 'x', :x(2)), 'x x c d', '.subst and :x(2)';
is 'a b c d'.subst(/\w/, 'x', :x(3)), 'x x x d', '.subst and :x(3)';
is 'a b c d'.subst(/\w/, 'x', :x(4)), 'x x x x', '.subst and :x(4)';
is 'a b c d'.subst(/\w/, 'x', :x(5)), 'a b c d', '.subst and :x(5)';
is 'a b c d'.subst(/\w/, 'x', :x(*)), 'x x x x', '.subst and :x(*)';
is 'a b c d'.subst(/\w/, 'x', :x(0..1)), 'x b c d', '.subst and :x(0..1)';
is 'a b c d'.subst(/\w/, 'x', :x(1..3)), 'x x x d', '.subst and :x(0..3)';
is 'a b c d'.subst(/\w/, 'x', :x(3..5)), 'x x x x', '.subst and :x(3..5)';
is 'a b c d'.subst(/\w/, 'x', :x(5..6)), 'a b c d', '.subst and :x(5..6)';
is 'a b c d'.subst(/\w/, 'x', :x(3..2)), 'a b c d', '.subst and :x(3..2)';
# string pattern versions
is 'a a a a'.subst('a', 'x', :g), 'x x x x', '.subst (str pattern) and :g';
is 'a a a a'.subst('a', 'x', :x(0)), 'a a a a', '.subst (str pattern) and :x(0)';
is 'a a a a'.subst('a', 'x', :x(1)), 'x a a a', '.subst (str pattern) and :x(1)';
is 'a a a a'.subst('a', 'x', :x(2)), 'x x a a', '.subst (str pattern) and :x(2)';
is 'a a a a'.subst('a', 'x', :x(3)), 'x x x a', '.subst (str pattern) and :x(3)';
is 'a a a a'.subst('a', 'x', :x(4)), 'x x x x', '.subst (str pattern) and :x(4)';
is 'a a a a'.subst('a', 'x', :x(5)), 'a a a a', '.subst (str pattern) and :x(5)';
is 'a a a a'.subst('a', 'x', :x(*)), 'x x x x', '.subst (str pattern) and :x(*)';
is 'a a a a'.subst('a', 'x', :x(0..1)), 'x a a a', '.subst (str pattern) and :x(0..1)';
is 'a a a a'.subst('a', 'x', :x(1..3)), 'x x x a', '.subst (str pattern) and :x(0..3)';
is 'a a a a'.subst('a', 'x', :x(3..5)), 'x x x x', '.subst (str pattern) and :x(3..5)';
is 'a a a a'.subst('a', 'x', :x(5..6)), 'a a a a', '.subst (str pattern) and :x(5..6)';
is 'a a a a'.subst('a', 'x', :x(3..2)), 'a a a a', '.subst (str pattern) and :x(3..2)';
}
# :nth
{
is 'a b c d'.subst(/\w/, 'x', :nth(0)), 'a b c d', '.subst and :nth(0)';
is 'a b c d'.subst(/\w/, 'x', :nth(1)), 'x b c d', '.subst and :nth(1)';
is 'a b c d'.subst(/\w/, 'x', :nth(2)), 'a x c d', '.subst and :nth(2)';
is 'a b c d'.subst(/\w/, 'x', :nth(3)), 'a b x d', '.subst and :nth(3)';
is 'a b c d'.subst(/\w/, 'x', :nth(4)), 'a b c x', '.subst and :nth(4)';
is 'a b c d'.subst(/\w/, 'x', :nth(5)), 'a b c d', '.subst and :nth(5)';
# string pattern versions
is 'a a a a'.subst('a', 'x', :nth(0)), 'a a a a', '.subst (str pattern) and :nth(0)';
is 'a a a a'.subst('a', 'x', :nth(1)), 'x a a a', '.subst (str pattern) and :nth(1)';
is 'a a a a'.subst('a', 'x', :nth(2)), 'a x a a', '.subst (str pattern) and :nth(2)';
is 'a a a a'.subst('a', 'x', :nth(3)), 'a a x a', '.subst (str pattern) and :nth(3)';
is 'a a a a'.subst('a', 'x', :nth(4)), 'a a a x', '.subst (str pattern) and :nth(4)';
is 'a a a a'.subst('a', 'x', :nth(5)), 'a a a a', '.subst (str pattern) and :nth(5)';
}
# combining :nth with :x
{
is 'a b c d e f g h'.subst(/\w/, 'x', :nth(1,2,3,4), :x(3)),
'x x x d e f g h',
'.subst with :nth(1,2,3,4)) and :x(3)';
is 'a b c d e f g h'.subst(/\w/, 'x', :nth(2,4,6,8), :x(2)),
'a x c x e f g h',
'.subst with :nth(2,4,6,8) and :x(2)';
is 'a b c d e f g h'.subst(/\w/, 'x', :nth(2, 4, 1, 6), :x(3)),
'a x c x e x g h',
'.subst with :nth(2) and :x(3)';
}
{
# :p
is 'a b c d e f g h'.subst(/\w/, 'x', :p(0)),
'x b c d e f g h',
'.subst with :p(0)';
is 'a b c d e f g h'.subst(/\w/, 'x', :p(1)),
'a b c d e f g h',
'.subst with :p(1)';
is 'a b c d e f g h'.subst(/\w/, 'x', :p(2)),
'a x c d e f g h',
'.subst with :p(2)';
# :p and :g
#?niecza todo
is 'a b c d e f g h'.subst(/\w/, 'x', :p(0), :g),
'x x x x x x x x',
'.subst with :p(0) and :g';
is 'a b c d e f g h'.subst(/\w/, 'x', :p(1), :g),
'a b c d e f g h',
'.subst with :p(1) and :g';
#?niecza todo
is 'a b c d e f g h'.subst(/\w/, 'x', :p(2), :g),
'a x x x x x x x',
'.subst with :p(2) and :g';
}
{
# :c
is 'a b c d e f g h'.subst(/\w/, 'x', :c(0)),
'x b c d e f g h',
'.subst with :c(0)';
is 'a b c d e f g h'.subst(/\w/, 'x', :c(1)),
'a x c d e f g h',
'.subst with :c(1)';
is 'a b c d e f g h'.subst(/\w/, 'x', :c(2)),
'a x c d e f g h',
'.subst with :c(2)';
# :c and :g
is 'a b c d e f g h'.subst(/\w/, 'x', :c(0), :g),
'x x x x x x x x',
'.subst with :c(0) and :g';
is 'a b c d e f g h'.subst(/\w/, 'x', :c(1), :g),
'a x x x x x x x',
'.subst with :c(1) and :g';
is 'a b c d e f g h'.subst(/\w/, 'x', :c(2), :g),
'a x x x x x x x',
'.subst with :c(2) and :g';
# :c and :nth(3, 4)
#?niecza 3 todo ":nth(3, 4) NYI"
is 'a b c d e f g h'.subst(/\w/, 'x', :c(0), :nth(3, 4)),
'a b x x e f g h',
'.subst with :c(0) and :nth(3, 4)';
is 'a b c d e f g h'.subst(/\w/, 'x', :c(1), :nth(3, 4)),
'a b c x x f g h',
'.subst with :c(1) and :nth(3, 4)';
is 'a b c d e f g h'.subst(/\w/, 'x', :c(2), :nth(3, 4)),
'a b c x x f g h',
'.subst with :c(2) and :nth(3, 4)';
}
{
my $s = "ZBC";
my @a = ("A", 'ZBC');
$_ = q{Now I know my abc's};
is +s:g/Now/Wow/, 1, 'Constant substitution succeeds and returns correct count';
is($_, q{Wow I know my abc's}, 'Constant substitution produces correct result');
isa-ok s:global:i/ABC/$s/.WHAT, List, 'Global scalar substitution succeeds and returns a List';
is($_, q{Wow I know my ZBC's}, 'Scalar substitution produces correct result');
isa-ok s/BC/@a[]/.WHAT, Match, 'Single list replacement succeeds and returns a Match';
is($_, q{Wow I know my ZA ZBC's}, 'List replacement produces correct result');
dies-ok { 'abc' ~~ s/b/g/ },
"can't modify string literal (only variables)";
}
# L<S05/Modifiers/The :s modifier is considered sufficiently important>
#?niecza skip "Action method quote:ss not yet implemented"
{
$_ = "a\nb\tc d";
ok ss/a b c d/w x y z/, 'successful substitution returns truthy';
# RT #120526
is $_, "w\nx\ty z", 'ss/.../.../ preserves whitespace';
dies-ok {"a b c" ~~ ss/a b c/x y z/}, 'Cannot ss/// string literal';
}
#L<S05/Substitution/As with Perl 5, a bracketing form is also supported>
{
my $a = 'abc';
ok $a ~~ s[b] = 'de', 's[...] = ... returns true on success';
is $a, 'adec', 'substitution worked';
$a = 'abc';
nok $a ~~ s[d] = 'de', 's[...] = ... returns false on failure';
is $a, 'abc', 'failed substitutions leaves string unchanged';
}
{
eval-dies-ok '$_ = "a"; s:unkonwn/a/b/', 's/// dies on unknown adverb';
eval-dies-ok '$_ = "a"; s:overlap/a/b/', ':overlap does not make sense on s///';
}
# note that when a literal is passed to 'given', $_ is bound read-only
{
given my $x = 'abc' {
ok (s[b] = 'de'), 's[...] = ... returns true on success';
is $_, 'adec', 'substitution worked';
}
given my $y = 'abc' {
s[d] = 'foo';
is $_, 'abc', 'failed substitutions leaves string unchanged';
}
}
{
my $x = 'foobar';
is +($x ~~ s:g[o] = 'u'), 2, 's:global[..] = returns correct count';
is $x, 'fuubar', 'and the substition worked';
}
{
$_ = 'a b c';
s[\w] = uc($/);
is $_, 'A b c', 'can use $/ on the RHS';
$_ = 'a b c';
s[(\w)] = uc($0);
is $_, 'A b c', 'can use $0 on the RHS';
$_ = 'a b c';
is +(s:g[ (\w) ] = $0 x 2), 3, 's:g[] returns proper count of matches';
is $_, 'aa bb cc', 's:g[...] and captures work together well';
}
{
my $x = 'ABCD';
$x ~~ s:x(2)/<.alpha>/x/;
is $x, 'xxCD', 's:x(2)';
}
# s///
{
my $x = 'ooooo';
ok $x ~~ s:1st/./X/, 's:1st return value';
is $x, 'Xoooo', 's:1st side effect';
$x = 'ooooo';
ok $x ~~ s:2nd/./X/, 's:2nd return value';
is $x, 'oXooo', 's:2nd side effect';
$x = 'ooooo';
ok $x ~~ s:3rd/./X/, 's:3rd return value';
is $x, 'ooXoo', 's:3rd side effect';
$x = 'ooooo';
ok $x ~~ s:4th/./X/, 's:4th return value';
is $x, 'oooXo', 's:4th side effect';
$x = 'ooooo';
ok $x ~~ s:nth(5)/./X/, 's:nth(5) return value';
is $x, 'ooooX', 's:nth(5) side effect';
$x = 'ooooo';
nok $x ~~ s:nth(6)/./X/, 's:nth(6) return value';
is $x, 'ooooo', 's:nth(6) no side effect';
}
# s///
{
my $x = 'ooooo';
$x ~~ s:x(2):nth(1,3)/o/A/;
is $x, 'AoAoo', 's:x(2):nth(1,3) works in combination';
$x = 'ooooo';
$x ~~ s:2x:nth(1,3)/o/A/;
is $x, 'AoAoo', 's:2x:nth(1,3) works in combination';
}
# RT #83484
# s// with other separators
{
my $x = 'abcde';
$x ~~ s!bc!zz!;
is $x, 'azzde', '! separator';
}
#L<S05/Substitution/Any scalar assignment operator may be used>
#?niecza skip 's[...] op= RHS'
{
given 'a 2 3' -> $_ is copy {
ok (s[\d] += 5), 's[...] += 5 returns True';
is $_, 'a 7 3', 's[...] += 5 gave right result';
}
given 'a b c' -> $_ is copy {
s:g[\w] x= 2;
is $_, 'aa bb cc', 's:g[..] x= 2 worked';
}
}
#?niecza skip 's:g[...] ='
{
multi sub infix:<fromplus>(Match $a, Int $b) {
$a.from + $b
}
given 'a b c' -> $_ is copy {
ok (s:g[\w] fromplus= 3), 's:g[...] customop= returned True';
is $_, '3 5 7', '... and got right result';
}
}
# RT #69044
{
sub s { 'sub s' }
$_ = "foo";
ok s:s,foo,bar, , 's with colon is always substitution';
is s(), 'sub s', 'can call sub s as "s()"';
is s, 'sub s', 'can call sub s as "s"';
$_ = "foo";
ok ss (foo) = 'bar', 'bare ss is substitution before whitespace then parens';
}
# Test for :samecase
#?niecza skip ":samecase NYI"
{
is 'The foo and the bar'.subst('the', 'that', :samecase), 'The foo and that bar', '.substr and :samecase (1)';
is 'The foo and the bar'.subst('the', 'That', :samecase), 'The foo and that bar', '.substr and :samecase (2)';
is 'The foo and the bar'.subst(/:i the/, 'that', :samecase), 'That foo and the bar', '.substr (string pattern) and : samecase (1)';
is 'The foo and the bar'.subst(/:i The/, 'That', :samecase), 'That foo and the bar', '.substr (string pattern) and : samecase (2)';
is 'The foo and the bar'.subst(/:i the/, 'that', :g, :samecase), 'That foo and that bar', '.substr (string pattern) and :g and :samecase (1)';
is 'The foo and the bar'.subst(/:i The/, 'That', :g, :samecase), 'That foo and that bar', '.substr (string pattern) and :g and :samecase (2)';
my $str = "that";
is 'The foo and the bar'.subst(/:i the/, {++$str}, :samecase), 'Thau foo and the bar', '.substr and samecase, worked with block replacement';
is 'The foo and the bar'.subst(/:i the/, {$str++}, :g, :samecase), 'Thau foo and thav bar', '.substr and :g and :samecase, worked with block replacement';
}
#?niecza skip "Regex modifiers ii and samecase NYI"
{
$_ = 'foObar';
s:ii/oo/au/;
is $_, 'faUbar', ':ii implies :i';
$_ = 'foObar';
s:samecase/oo/au/;
is $_, 'faUbar', ':samecase implies :i';
}
# RT #66816
#?niecza todo
{
my $str = "a\nbc\nd";
is $str.subst(/^^/, '# ', :g), "# a\n# bc\n# d",
'Zero-width substitution does not make the GC recurse';
}
{
#?niecza todo "Niecza works when it shouldn't?"
eval-dies-ok q[ $_ = "abc"; my $i = 1; s:i($i)/a/b/ ],
'Value of :i must be known at compile time';
#?rakudo todo 'be smarter about constant detection'
eval-lives-ok q[ $_ = "abc";s:i(1)/a/b/ ],
':i(1) is OK';
}
{
$_ = 'foo';
s/f(.)/b$0/;
is $_, 'boo', 'can use $0 in RHS of s///';
}
# RT #76664
{
class SubstInsideMethod {
method ro($_ ) { s/c// }
}
dies-ok { SubstInsideMethod.new.ro('ccc') }, '(sanely) dies when trying to s/// a read-only variable';
}
# RT #83552
#?niecza skip 'Unable to resolve method postcircumfix:<( )> in type Any'
#?DOES 3
{
$_ = "foo"; s[f] = 'bar';
is $_, "baroo", 's[f] is parsed as a substitution op';
throws-like q{$_ = "foo"; s[] = "bar";}, X::Syntax::Regex::NullRegex;
}
# RT #119201
{
my $RT119201_s = 'abcdef';
my $RT119201_m = '';
$RT119201_s .= subst(/(\w)/, { $RT119201_m = $/[0] });
is($RT119201_m, 'a', 'get match variable in replacement of subst-mutator');
}
# RT #122349
{
eval-lives-ok '$_ = "a";s/a$/b/;s|b$|c|;s!c$!d!;', '$ anchor directly at the end of the search pattern works';
}
# RT #123168
{
my $foo = "bar";
$foo ~~ s:g [ r ] = 'z' if $foo.defined;
is $foo, 'baz', 's{}="" plus statement mod if is not parsed as /i';
}
{
my $_ = 42;
my $match = s/\d+/xxx/;
isa-ok $match, Match, 's/// returns a Match object on non-strings';
is $_, 'xxx', 's/// can modify a container that contains a non-string';
}
# RT #123597
{
my $_ = 0; s{^(\d+)$} = sprintf "%3d -", $_;
is $_, " 0 -", 's{}="" can modify a container that contains a non-string';
}
# RT #114388
{
$_ = "real";
s[ea] = "rea";
is $_, "rreal", 's[]="" works when $_ is set';
$_ = "";
throws-like { EVAL 's[] = "rea"' },
X::Syntax::Regex::NullRegex;
}
# RT #114388 -- part two
#?rakudo skip "RT #114388 -- No such method 'subst-mutate' for invocant of type 'Any'"
{
$_ = Any;
s[ea] = "rea";
is $_, "", 'can use s[]="" when $_ is not set';
}
# vim: ft=perl6
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