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| author | Mike Pall <mike> | 2011-04-20 01:53:26 +0200 |
|---|---|---|
| committer | Mike Pall <mike> | 2011-04-20 01:53:26 +0200 |
| commit | 5d096dcfdef5ddb0e6dd67e155adf893df7d7809 (patch) | |
| tree | 9bdbd2852738e761b1b2f0f1858eb91f22a8e638 /doc/ext_ffi_api.html | |
| parent | 9ea679410c8061741a49350b3fc969365ffe5547 (diff) | |
| download | luajit2-5d096dcfdef5ddb0e6dd67e155adf893df7d7809.tar.gz | |
FFI: Add ffi.istype() function.
Diffstat (limited to 'doc/ext_ffi_api.html')
| -rw-r--r-- | doc/ext_ffi_api.html | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/ext_ffi_api.html b/doc/ext_ffi_api.html index 2b6d1d86..b1b42878 100644 --- a/doc/ext_ffi_api.html +++ b/doc/ext_ffi_api.html @@ -316,6 +316,24 @@ of <tt>ct</tt>, which must be a <tt>struct</tt>. Additionally returns the position and the field size (in bits) for bit fields. </p> +<h3 id="ffi_istype"><tt>status = ffi.istype(ct, obj)</tt></h3> +<p> +Returns <tt>true</tt> if <tt>obj</tt> has the C type given by +<tt>ct</tt>. Returns <tt>false</tt> otherwise. +</p> +<p> +C type qualifiers (<tt>const</tt> etc.) are ignored. Pointers are +checked with the standard pointer compatibility rules, but without any +special treatment for <tt>void *</tt>. If <tt>ct</tt> specifies a +<tt>struct</tt>/<tt>union</tt>, then a pointer to this type is accepted, +too. Otherwise the types must match exactly. +</p> +<p> +Note: this function accepts all kinds of Lua objects for the +<tt>obj</tt> argument, but always returns <tt>false</tt> for non-cdata +objects. +</p> + <h2 id="util">Utility Functions</h2> <h3 id="ffi_string"><tt>str = ffi.string(ptr [,len])</tt></h3> |