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patch 7.4.1730

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Problem:    It is not easy to get a character out of a string.
Solution:   Add strgetchar() and strcharpart().
This commit is contained in:
Bram Moolenaar
2016-04-14 15:13:46 +02:00
parent 6244a0fc29
commit 58de0e2dcc
3 changed files with 158 additions and 0 deletions
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47
src/testdir/test_expr.vim
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@@ -50,3 +50,50 @@ func Test_dict()
call assert_equal('none', d[''])
call assert_equal('aaa', d['a'])
endfunc
func Test_strgetchar()
call assert_equal(char2nr('a'), strgetchar('axb', 0))
call assert_equal(char2nr('x'), strgetchar('axb', 1))
call assert_equal(char2nr('b'), strgetchar('axb', 2))
call assert_equal(-1, strgetchar('axb', -1))
call assert_equal(-1, strgetchar('axb', 3))
call assert_equal(-1, strgetchar('', 0))
if !has('multi_byte')
return
endif
call assert_equal(char2nr('á'), strgetchar('áxb', 0))
call assert_equal(char2nr('x'), strgetchar('áxb', 1))
call assert_equal(char2nr('a'), strgetchar('àxb', 0))
call assert_equal(char2nr('̀'), strgetchar('àxb', 1))
call assert_equal(char2nr('x'), strgetchar('àxb', 2))
endfunc
func Test_strcharpart()
call assert_equal('a', strcharpart('axb', 0, 1))
call assert_equal('x', strcharpart('axb', 1, 1))
call assert_equal('b', strcharpart('axb', 2, 1))
call assert_equal('xb', strcharpart('axb', 1))
call assert_equal('', strcharpart('axb', 1, 0))
call assert_equal('', strcharpart('axb', 1, -1))
call assert_equal('', strcharpart('axb', -1, 1))
call assert_equal('', strcharpart('axb', -2, 2))
call assert_equal('a', strcharpart('axb', -1, 2))
if !has('multi_byte')
return
endif
call assert_equal('áxb', strcharpart('áxb', 0))
call assert_equal('á', strcharpart('áxb', 0, 1))
call assert_equal('x', strcharpart('áxb', 1, 1))
call assert_equal('a', strcharpart('àxb', 0, 1))
call assert_equal('̀', strcharpart('àxb', 1, 1))
call assert_equal('x', strcharpart('àxb', 2, 1))
endfunc