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patch 8.1.2035: recognizing octal numbers is confusing

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Problem:    Recognizing octal numbers is confusing.
Solution:   Introduce scriptversion 4: do not use octal and allow for single
            quote inside numbers.
This commit is contained in:
Bram Moolenaar
2019-09-15 14:33:22 +02:00
parent 50bf7ce0c9
commit 60a8de28d1
8 changed files with 78 additions and 27 deletions
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29
runtime/doc/eval.txt
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@@ -1,4 +1,4 @@
*eval.txt* For Vim version 8.1. Last change: 2019 Sep 10
*eval.txt* For Vim version 8.1. Last change: 2019 Sep 15
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -92,7 +92,8 @@ the Number. Examples:
*octal*
Conversion from a String to a Number is done by converting the first digits to
a number. Hexadecimal "0xf9", Octal "017", and Binary "0b10" numbers are
recognized. If the String doesn't start with digits, the result is zero.
recognized (NOTE: when using |scriptversion-4| octal is not recognized). If
the String doesn't start with digits, the result is zero.
Examples:
String "456" --> Number 456 ~
String "6bar" --> Number 6 ~
@@ -2757,7 +2758,8 @@ 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
str2nr({expr} [, {base} [, {quoted}]])
Number convert String to Number
strchars({expr} [, {skipcc}]) Number character length of the String {expr}
strcharpart({str}, {start} [, {len}])
String {len} characters of {str} at {start}
@@ -9075,9 +9077,11 @@ str2list({expr} [, {utf8}]) *str2list()*
GetString()->str2list()
str2nr({expr} [, {base}]) *str2nr()*
str2nr({expr} [, {base} [, {quoted}]]) *str2nr()*
Convert string {expr} to a number.
{base} is the conversion base, it can be 2, 8, 10 or 16.
When {quoted} is present and non-zero then embedded single
quotes are ignored, thus "1'000'000" is a million.
When {base} is omitted base 10 is used. This also means that
a leading zero doesn't cause octal conversion to be used, as
@@ -12937,6 +12941,23 @@ instead of failing in mysterious ways.
Test for support with: >
has('vimscript-3')
<
*scriptversion-4* >
:scriptversion 4
< Numbers with a leading zero are not recognized as octal. With the
previous version you get: >
echo 017 " displays 15
echo 018 " displays 18
< with script version 4: >
echo 017 " displays 17
echo 018 " displays 18
< Also, it is possible to use single quotes inside numbers to make them
easier to read: >
echo 1'000'000
< The quotes must be surrounded by digits.
Test for support with: >
has('vimscript-4')
==============================================================================
11. No +eval feature *no-eval-feature*