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patch 8.1.1122: char2nr() does not handle composing characters

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Problem:    char2nr() does not handle composing characters.
Solution:   Add str2list() and list2str(). (Ozaki Kiichi, closes #4190)
This commit is contained in:
Bram Moolenaar
2019-04-06 13:18:12 +02:00
parent 4a5711b5ea
commit 9d40128afd
5 changed files with 178 additions and 2 deletions
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29
runtime/doc/eval.txt
View File

@@ -2442,6 +2442,7 @@ libcallnr({lib}, {func}, {arg}) Number idem, but return a Number
line({expr}) Number line nr of cursor, last line or mark
line2byte({lnum}) Number byte count of line {lnum}
lispindent({lnum}) Number Lisp indent for line {lnum}
list2str({list} [, {utf8}]) String turn numbers in {list} into a String
localtime() Number current time
log({expr}) Float natural logarithm (base e) of {expr}
log10({expr}) Float logarithm of Float {expr} to base 10
@@ -2609,6 +2610,8 @@ split({expr} [, {pat} [, {keepempty}]])
List make |List| from {pat} separated {expr}
sqrt({expr}) Float square root of {expr}
str2float({expr}) Float convert String to Float
str2list({expr} [, {utf8}]) List convert each character of {expr} to
ASCII/UTF8 value
str2nr({expr} [, {base}]) Number convert String to Number
strchars({expr} [, {skipcc}]) Number character length of the String {expr}
strcharpart({str}, {start} [, {len}])
@@ -6193,6 +6196,20 @@ lispindent({lnum}) *lispindent()*
When {lnum} is invalid or Vim was not compiled the
|+lispindent| feature, -1 is returned.
list2str({list} [, {utf8}]) *list2str()*
Convert each number in {list} to a character string can
concatenate them all. Examples: >
list2str([32]) returns " "
list2str([65, 66, 67]) returns "ABC"
< The same can be done (slowly) with: >
join(map(list, {nr, val -> nr2char(val)}), '')
< |str2list()| does the opposite.
When {utf8} is omitted or zero, the current 'encoding' is used.
With {utf8} is 1, always return utf-8 characters.
With utf-8 composing characters work as expected: >
list2str([97, 769]) returns "á"
<
localtime() *localtime()*
Return the current time, measured as seconds since 1st Jan
1970. See also |strftime()| and |getftime()|.
@@ -8722,6 +8739,18 @@ str2float({expr}) *str2float()*
let f = str2float(substitute(text, ',', '', 'g'))
< {only available when compiled with the |+float| feature}
str2list({expr} [, {utf8}]) *str2list()*
Return a list containing the number values which represent
each character in String {expr}. Examples: >
str2list(" ") returns [32]
str2list("ABC") returns [65, 66, 67]
< |list2str()| does the opposite.
When {utf8} is omitted or zero, the current 'encoding' is used.
With {utf8} set to 1, always treat the String as utf-8
characters. With utf-8 composing characters are handled
properly: >
str2list("á") returns [97, 769]
str2nr({expr} [, {base}]) *str2nr()*
Convert string {expr} to a number.

6
runtime/doc/usr_41.txt
View File

@@ -577,8 +577,10 @@ used for. You can find an alphabetical list here: |functions|. Use CTRL-] on
the function name to jump to detailed help on it.
String manipulation: *string-functions*
nr2char() get a character by its ASCII value
char2nr() get ASCII value of a character
nr2char() get a character by its number value
list2str() get a character string from a list of numbers
char2nr() get number value of a character
str2list() get list of numbers from a string
str2nr() convert a string to a Number
str2float() convert a string to a Float
printf() format a string according to % items