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* internals.texi (C Integer Types): Prefer 'false' and 'true'

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to '0' and '1' for booleans.
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Paul Eggert 2014-03-20 10:58:01 -07:00
parent 0df098bfd1
commit 4c073dab2a
2 changed files with 9 additions and 4 deletions
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5
doc/lispref/ChangeLog
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@ -1,3 +1,8 @@
2014-03-20 Paul Eggert <eggert@cs.ucla.edu>
* internals.texi (C Integer Types): Prefer 'false' and 'true'
to '0' and '1' for booleans.
2014-03-19 Paul Eggert <eggert@cs.ucla.edu>
* numbers.texi: Improve and clarify a bit, and fix some minor bugs.

8
doc/lispref/internals.texi
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@ -1620,10 +1620,10 @@ might not be. Single-bit bit fields are invariably @code{unsigned
int} so that their values are 0 and 1.
@item
In C, Emacs commonly uses @code{bool}, 1, and 0 for boolean values.
Using @code{bool} for booleans can make programs easier to read and a
bit faster than using @code{int}. Although it is also OK to use
@code{int}, this older style is gradually being phased out. When
Prefer @code{bool}, @code{false} and @code{true} for booleans.
Using @code{bool} can make programs easier to read and a bit faster than
using @code{int}. Although it is also OK to use @code{int}, @code{0}
and @code{1}, this older style is gradually being phased out. When
using @code{bool}, respect the limitations of the replacement
implementation of @code{bool}, as documented in the source file
@file{lib/stdbool.in.h}, so that Emacs remains portable to pre-C99