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Move foreach to its own header.

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This commit is contained in:
castano 2011-02-28 09:05:03 +00:00
parent b74cd8ec97
commit 609db2639e
4 changed files with 60 additions and 43 deletions
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44
src/nvcore/Array.h
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@ -18,55 +18,15 @@ standard foreach as in Qt.
#include "Debug.h"
#include "Stream.h"
#include "Utils.h" // swap
#include "ForEach.h" // swap
#include <string.h> // memmove
#include <new> // for placement new
#if NV_CC_GNUC // If typeof is available:
#define NV_FOREACH(i, container) \
typedef typeof(container) NV_STRING_JOIN2(cont,__LINE__); \
for(NV_STRING_JOIN2(cont,__LINE__)::PseudoIndex i((container).start()); !(container).isDone(i); (container).advance(i))
/*
#define NV_FOREACH(i, container) \
for(typename typeof(container)::PseudoIndex i((container).start()); !(container).isDone(i); (container).advance(i))
*/
#else // If typeof not available:
struct PseudoIndexWrapper {
template <typename T>
PseudoIndexWrapper(const T & container) {
nvStaticCheck(sizeof(typename T::PseudoIndex) <= sizeof(memory));
new (memory) typename T::PseudoIndex(container.start());
}
// PseudoIndex cannot have a dtor!
template <typename T> typename T::PseudoIndex & operator()(const T * container) {
return *reinterpret_cast<typename T::PseudoIndex *>(memory);
}
template <typename T> const typename T::PseudoIndex & operator()(const T * container) const {
return *reinterpret_cast<const typename T::PseudoIndex *>(memory);
}
uint8 memory[4]; // Increase the size if we have bigger enumerators.
};
#define NV_FOREACH(i, container) \
for(PseudoIndexWrapper i(container); !(container).isDone(i(&(container))); (container).advance(i(&(container))))
#endif
// Declare foreach keyword.
#if !defined NV_NO_USE_KEYWORDS
# define foreach NV_FOREACH
#endif
namespace nv
{
// @@ Move this to utils?
/// Delete all the elements of a container.
template <typename T>
void deleteAll(T & container)

1
src/nvcore/CMakeLists.txt
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@ -9,6 +9,7 @@ SET(CORE_SRCS
DefsGnucWin32.h
DefsVcWin32.h
FileSystem.h FileSystem.cpp
ForEach.h
HashMap.h
Library.h Library.cpp
Memory.h Memory.cpp

56
src/nvcore/ForEach.h Normal file
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@ -0,0 +1,56 @@
// This code is in the public domain -- Ignacio Castaño <castano@gmail.com>
#pragma once
#ifndef NV_CORE_FOREACH_H
#define NV_CORE_FOREACH_H
/*
The foreach macros that I use are very non-standard and somewhat confusing, but I like them.
*/
#include "nvcore.h"
#if NV_CC_GNUC // If typeof is available:
#define NV_FOREACH(i, container) \
typedef typeof(container) NV_STRING_JOIN2(cont,__LINE__); \
for(NV_STRING_JOIN2(cont,__LINE__)::PseudoIndex i((container).start()); !(container).isDone(i); (container).advance(i))
/*
#define NV_FOREACH(i, container) \
for(typename typeof(container)::PseudoIndex i((container).start()); !(container).isDone(i); (container).advance(i))
*/
#else // If typeof not available:
struct PseudoIndexWrapper {
template <typename T>
PseudoIndexWrapper(const T & container) {
nvStaticCheck(sizeof(typename T::PseudoIndex) <= sizeof(memory));
new (memory) typename T::PseudoIndex(container.start());
}
// PseudoIndex cannot have a dtor!
template <typename T> typename T::PseudoIndex & operator()(const T * container) {
return *reinterpret_cast<typename T::PseudoIndex *>(memory);
}
template <typename T> const typename T::PseudoIndex & operator()(const T * container) const {
return *reinterpret_cast<const typename T::PseudoIndex *>(memory);
}
uint8 memory[4]; // Increase the size if we have bigger enumerators.
};
#define NV_FOREACH(i, container) \
for(PseudoIndexWrapper i(container); !(container).isDone(i(&(container))); (container).advance(i(&(container))))
#endif
// Declare foreach keyword.
#if !defined NV_NO_USE_KEYWORDS
# define foreach NV_FOREACH
#endif
#endif // NV_CORE_FOREACH_H

2
src/nvcore/HashMap.h
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@ -14,7 +14,7 @@ HashMap based on Thatcher Ulrich <tu@tulrich.com> container, donated to the Publ
#include "Debug.h"
#include "Stream.h"
#include "Utils.h" // hash
#include "Array.h" // foreach/pseudoindex
#include "ForEach.h"
#include <new> // for placement new