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Diffstat (limited to 'doc/extension.rdoc')
| -rw-r--r-- | doc/extension.rdoc | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/extension.rdoc b/doc/extension.rdoc index 15417179e1..12cff6b497 100644 --- a/doc/extension.rdoc +++ b/doc/extension.rdoc @@ -169,6 +169,21 @@ INT2NUM() :: for arbitrary sized integers. INT2NUM() converts an integer into a Bignum if it is out of the FIXNUM range, but is a bit slower. +To convert C boolean to Ruby +true+ or +false+ : + +RBOOL() :: + +<code>RBOOL(v)</code> returns +Qtrue+ if _v_ is not 0, or +Qfalse+ +otherwisze _v_ is 0. + +Notice: RBOOL is defined since Ruby 3.1, if you want to use it in a +program which supports older versions, the fallback definition will be +needed, like as the following. + + #ifndef RBOOL + #define RBOOL(v) ((v) ? Qtrue : Qfalse) + #endif + === Manipulating Ruby Data As I already mentioned, it is not recommended to modify an object's |