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Libraries
mruby
Commits
63c0044b
Unverified
Commit
63c0044b
authored
Mar 22, 2017
by
ksss
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Fix result if pattern is empty
parent
3703aed7
Changes
2
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2 changed files
with
33 additions
and
7 deletions
+33
-7
mrblib/string.rb
mrblib/string.rb
+23
-7
test/t/string.rb
test/t/string.rb
+10
-0
No files found.
mrblib/string.rb
View file @
63c0044b
...
...
@@ -124,15 +124,31 @@ class String
#
# ISO 15.2.10.5.36
def
sub
(
*
args
,
&
block
)
if
args
.
size
==
2
pre
,
post
=
split
(
args
[
0
],
2
)
return
self
unless
post
# The sub target wasn't found in the string
pre
+
args
[
1
].
__sub_replace
(
pre
,
args
[
0
],
post
)
+
post
elsif
args
.
size
==
1
&&
block
split
(
args
[
0
],
2
).
join
(
block
.
call
(
args
[
0
]))
unless
(
1
..
2
).
include?
(
args
.
length
)
raise
ArgumentError
,
"wrong number of arguments (given
#{
args
.
length
}
, expected 2)"
end
pattern
,
replace
=
*
args
pattern
=
pattern
.
to_str
if
args
.
length
==
2
&&
block
block
=
nil
end
if
!
block
replace
=
replace
.
to_str
end
result
=
[]
this
=
dup
found
=
index
(
pattern
)
return
this
unless
found
result
<<
this
[
0
,
found
]
offset
=
found
+
pattern
.
length
result
<<
if
block
block
.
call
(
pattern
).
to_s
else
r
aise
ArgumentError
,
"wrong number of arguments"
r
eplace
.
__sub_replace
(
this
[
0
,
found
],
pattern
,
this
[
offset
..-
1
]
||
""
)
end
result
<<
this
[
offset
..-
1
]
if
offset
<
length
result
.
join
end
##
...
...
test/t/string.rb
View file @
63c0044b
...
...
@@ -585,6 +585,16 @@ assert('String#sub', '15.2.10.5.36') do
assert_equal
'aBcabc'
,
'abcabc'
.
sub
(
'b'
,
'B'
)
assert_equal
'aBcabc'
,
'abcabc'
.
sub
(
'b'
)
{
|
w
|
w
.
capitalize
}
assert_equal
'aa$'
,
'aa#'
.
sub
(
'#'
,
'$'
)
assert_equal
'.abc'
,
"abc"
.
sub
(
""
,
"."
)
str
=
"abc"
miss
=
str
.
sub
(
"X"
,
"Z"
)
assert_equal
str
,
miss
assert_not_equal
str
.
object_id
,
miss
.
object_id
a
=
[]
assert_equal
'.abc'
,
"abc"
.
sub
(
""
)
{
|
i
|
a
<<
i
;
"."
}
assert_equal
[
""
],
a
end
assert
(
'String#sub with backslash'
)
do
...
...
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