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author | Mike Pall <mike> | 2012-06-20 15:15:09 +0200 |
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committer | Mike Pall <mike> | 2012-06-20 15:16:40 +0200 |
commit | 6cee1333ef2b340e1b23e3051b9f433fc803d2ff (patch) | |
tree | 43052260288c8208d2b049852242aaa2ad0f1e0c /doc/ext_ffi_semantics.html | |
parent | 126f9906febcc90243a34191ab8986b9487cf186 (diff) | |
download | luajit-6cee1333ef2b340e1b23e3051b9f433fc803d2ff.tar.gz luajit-6cee1333ef2b340e1b23e3051b9f433fc803d2ff.tar.bz2 luajit-6cee1333ef2b340e1b23e3051b9f433fc803d2ff.zip |
FFI: Resolve metamethods for constructors, too.
Diffstat (limited to 'doc/ext_ffi_semantics.html')
-rw-r--r-- | doc/ext_ffi_semantics.html | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/doc/ext_ffi_semantics.html b/doc/ext_ffi_semantics.html index bacb4fb8..4b498fbe 100644 --- a/doc/ext_ffi_semantics.html +++ b/doc/ext_ffi_semantics.html | |||
@@ -590,8 +590,7 @@ ffi.new("struct nested", {x=1,y={2,3}}) --> x = 1, y.a = 2, y.b = 3 | |||
590 | <p> | 590 | <p> |
591 | All of the standard Lua operators can be applied to cdata objects or a | 591 | All of the standard Lua operators can be applied to cdata objects or a |
592 | mix of a cdata object and another Lua object. The following list shows | 592 | mix of a cdata object and another Lua object. The following list shows |
593 | the valid combinations. All other combinations currently raise an | 593 | the pre-defined operations. |
594 | error. | ||
595 | </p> | 594 | </p> |
596 | <p> | 595 | <p> |
597 | Reference types are dereferenced <em>before</em> performing each of | 596 | Reference types are dereferenced <em>before</em> performing each of |
@@ -600,7 +599,8 @@ C type pointed to by the reference. | |||
600 | </p> | 599 | </p> |
601 | <p> | 600 | <p> |
602 | The pre-defined operations are always tried first before deferring to a | 601 | The pre-defined operations are always tried first before deferring to a |
603 | metamethod for a ctype (if defined). | 602 | metamethod or index table (if any) for the corresponding ctype. An error |
603 | is raised if the metamethod lookup or index table lookup fails. | ||
604 | </p> | 604 | </p> |
605 | 605 | ||
606 | <h3 id="cdata_array">Indexing a cdata object</h3> | 606 | <h3 id="cdata_array">Indexing a cdata object</h3> |
@@ -625,7 +625,9 @@ field value and <a href="#convert_tolua">converts it to a Lua | |||
625 | object</a>. A write access <a href="#convert_fromlua">converts a Lua | 625 | object</a>. A write access <a href="#convert_fromlua">converts a Lua |
626 | object to the field type</a> and stores the converted value to the | 626 | object to the field type</a> and stores the converted value to the |
627 | field. An error is raised if a write access to a constant | 627 | field. An error is raised if a write access to a constant |
628 | <tt>struct</tt>/<tt>union</tt> or a constant field is attempted.</li> | 628 | <tt>struct</tt>/<tt>union</tt> or a constant field is attempted. |
629 | Scoped enum constants or static constants are treated like a constant | ||
630 | field.</li> | ||
629 | 631 | ||
630 | <li><b>Indexing a complex number</b>: a complex number can be indexed | 632 | <li><b>Indexing a complex number</b>: a complex number can be indexed |
631 | either by a cdata number or a Lua number with the values 0 or 1, or by | 633 | either by a cdata number or a Lua number with the values 0 or 1, or by |
@@ -644,6 +646,12 @@ assigning to an index of a vector raises an error.</li> | |||
644 | 646 | ||
645 | </ul> | 647 | </ul> |
646 | <p> | 648 | <p> |
649 | A ctype object can be indexed with a string key, too. The only | ||
650 | pre-defined operation is reading scoped constants of | ||
651 | <tt>struct</tt>/<tt>union</tt> types. All other accesses defer | ||
652 | to the corresponding metamethods or index tables (if any). | ||
653 | </p> | ||
654 | <p> | ||
647 | Note: since there's (deliberately) no address-of operator, a cdata | 655 | Note: since there's (deliberately) no address-of operator, a cdata |
648 | object holding a value type is effectively immutable after | 656 | object holding a value type is effectively immutable after |
649 | initialization. The JIT compiler benefits from this fact when applying | 657 | initialization. The JIT compiler benefits from this fact when applying |