Minor tweek for WXPM

[wxWidgets.git] / docs / latex / wx / array.tex

diff --git a/docs/latex/wx/array.tex b/docs/latex/wx/array.tex
index 2840322d0c1e15ed1a6d832f58a2b2096e05fdf3..8d4fd6f665c9c2bcc3bddcd9203ae38dd6dd8352 100644 (file)
--- a/docs/latex/wx/array.tex
+++ b/docs/latex/wx/array.tex
@@ -39,7 +39,14 @@ deleted when the element is removed from the array. It should be noted that
 all of wxArray's functions are inline, so it costs strictly nothing to define as
 many array types as you want (either in terms of the executable size or the
 speed) as long as at least one of them is defined and this is always the case
-because wxArrays are used by wxWindows internally.
+because wxArrays are used by wxWindows internally. This class has one serious
+limitation: it can only be used for storing integral types (bool, char, short,
+int, long and their unsigned variants) or pointers (of any kind). An attempt
+to use with objects of sizeof() greater than sizeof(long) will provoke a
+runtime assertion failure, however declaring a wxArray of floats will not (on
+the machines where sizeof(float) <= sizeof(long)), yet it will {\bf not} work,
+please use wxObjArray for storing floats and doubles (NB: a more efficient
+wxArrayDouble class is scheduled for the next release of wxWindows).
 
 wxSortedArray is a wxArray variant which should be used when searching in the
 array is a frequently used operation. It requires you to define an additional
@@ -51,9 +58,8 @@ slower: it is $O(log(N))$ instead of constant time (neglecting time spent in
 memory allocation routine). However, in a usual situation elements are added to
 an array much less often than searched inside it, so wxSortedArray may lead to
 huge performance improvements compared to wxArray. Finally, it should be
-noticed that, as wxArray, wxSortedArray can not be used to store anything of
-sizeof() larger than max(sizeof(long), sizeof(void *)) - an assertion failure
-will be raised from the constructor otherwise.
+noticed that, as wxArray, wxSortedArray can be only used for storing integral
+types or pointers.
 
 wxObjArray class treats its elements like "objects". It may delete them when
 they are removed from the array (invoking the correct destructor) and copies
@@ -89,7 +95,9 @@ class MyDirectory
 ...
 
 // now that we have MyDirectory declaration in scope we may finish the
-// definition of ArrayOfDirectories
+// definition of ArrayOfDirectories -- note that this expands into some C++
+// code and so should only be compiled once (i.e., don't put this in the
+// header, but into a source file or you will get linkin errors)
 #include <wx/arrimpl.cpp> // this is a magic incantation which must be done!
 WX_DEFINE_OBJARRAY(ArrayOfDirectories);
 
@@ -231,7 +239,7 @@ This macro defines a new sorted array class named {\it name} and containing
 the elements of type {\it T}. Example:
 
 \begin{verbatim}
-WX_DEFINE_SORTED_ARRAY(int, wxArrayInt);
+WX_DEFINE_SORTED_ARRAY(int, wxSortedArrayInt);
 
 class MyClass;
 WX_DEFINE_SORTED_ARRAY(MyClass *, wxArrayOfMyClass);
@@ -245,7 +253,7 @@ int CompareInts(int n1, int n2)
     return n1 - n2;
 }
 
-wxArrayInt sorted(CompareInts);
+wxSortedArrayInt sorted(CompareInts);
 
 int CompareMyClassObjects(MyClass *item1, MyClass *item2)
 {