Make customization example more clear with a heading before each option

This commit is contained in:
Ion Gaztañaga
2026-01-24 22:53:42 +01:00
parent 34bdb94986
commit 06cdd2fc4a
6 changed files with 80 additions and 32 deletions

View File

@@ -20,6 +20,10 @@ int main ()
{
using namespace boost::container;
//--------------------------------------------
// 'stored_size' option
//--------------------------------------------
//This option specifies that a deque that will use "unsigned char" as
//the type to store capacity or size internally.
typedef deque_options< stored_size<unsigned char> >::type size_option_t;
@@ -43,6 +47,10 @@ int main ()
assert(exception_thrown == true);
//--------------------------------------------
// 'block_size' option
//--------------------------------------------
//This option specifies the desired block size for deque
typedef deque_options< block_size<128u> >::type block_128_option_t;
@@ -50,6 +58,10 @@ int main ()
typedef deque<int, void, block_128_option_t > block_128_deque_t;
assert(block_128_deque_t::get_block_size() == 128u);
//--------------------------------------------
// 'block_bytes' option
//--------------------------------------------
//This option specifies the maximum block size for deque
//in bytes
typedef deque_options< block_bytes<1024u> >::type block_1024_bytes_option_t;

View File

@@ -20,9 +20,10 @@ int main ()
{
using namespace boost::container;
////////////////////////////////////////////////
// 'stored_size' option
////////////////////////////////////////////////
//--------------------------------------------
// 'stored_size' option
//--------------------------------------------
//Specify that a devector will use "unsigned char" as the type to store size/capacity
typedef devector_options< stored_size<unsigned char> >::type size_option_t;
@@ -43,9 +44,10 @@ int main ()
//=catch(...){ exception_thrown = true; }
assert(exception_thrown == true);
////////////////////////////////////////////////
// 'growth_factor' option
////////////////////////////////////////////////
//--------------------------------------------
// 'growth_factor' option
//--------------------------------------------
//Specify that a devector will increase its capacity 50% when reallocating
typedef devector_options< growth_factor<growth_factor_50> >::type growth_50_option_t;
@@ -58,9 +60,9 @@ int main ()
growth_50_dv.push_back(1);
assert(growth_50_dv.capacity() == old_cap*3/2);
////////////////////////////////////////////////
// 'relocate_on' option
////////////////////////////////////////////////
//--------------------------------------------
// 'relocate_on' option
//--------------------------------------------
//Specifies that a devector will not reallocate but relocate elements if the free space
//at one end is exhausted and the total load factor is below the 66% threshold.

View File

@@ -20,6 +20,10 @@ int main ()
{
using namespace boost::container;
//--------------------------------------------
// 'inplace_alignment' option
//--------------------------------------------
//This option specifies the desired alignment for the internal value_type
typedef small_vector_options< inplace_alignment<16u> >::type alignment_16_option_t;
@@ -27,6 +31,9 @@ int main ()
small_vector<int, 10, void, alignment_16_option_t > sv;
assert(((std::size_t)sv.data() % 16u) == 0);
//--------------------------------------------
// 'growth_factor' option
//--------------------------------------------
//This option specifies that a vector will increase its capacity 50%
//each time the previous capacity was exhausted.
@@ -41,6 +48,10 @@ int main ()
growth_50_vector.push_back(1);
assert(growth_50_vector.capacity() == old_cap*3/2);
//--------------------------------------------
// 'stored_size' option
//--------------------------------------------
//This option specifies that a vector that will use "unsigned char" as
//the type to store capacity or size internally.
typedef small_vector_options< stored_size<unsigned char> >::type size_option_t;

View File

@@ -20,6 +20,10 @@ int main ()
{
using namespace boost::container;
//--------------------------------------------
// 'inplace_alignment' option
//--------------------------------------------
//This option specifies the desired alignment for value_type
typedef static_vector_options< inplace_alignment<16u> >::type alignment_16_option_t;
@@ -27,12 +31,20 @@ int main ()
static_vector<int, 10, alignment_16_option_t > sv;
assert(((std::size_t)sv.data() % 16u) == 0);
//--------------------------------------------
// 'throw_on_overflow' option
//--------------------------------------------
//This static_vector won't throw on overflow, for maximum performance
typedef static_vector_options< throw_on_overflow<false> >::type no_throw_options_t;
//Create static_vector with no throw on overflow
static_vector<int, 10, no_throw_options_t > sv2;
//--------------------------------------------
// 'stored_size' option
//--------------------------------------------
//This options specifies that internal `size()` can be represented by an unsigned char
//instead of the default `std::size_t`.
typedef static_vector_options< stored_size<unsigned char> >::type stored_size_uchar_t;

View File

@@ -21,46 +21,49 @@ int main ()
using namespace boost::container;
//First define several options
//
//--------------------------------------------
// 'tree_type' option
//--------------------------------------------
//This option specifies an AVL tree based associative container
typedef tree_assoc_options< tree_type<avl_tree> >::type AVLTree;
//This option specifies an Splay tree based associative container
typedef tree_assoc_options< tree_type<splay_tree> >::type SplayTree;
//Splay tree based multiset container
typedef multiset<int, std::less<int>, new_allocator<int>, SplayTree> SplayMultiset;
//AVLTree based set container
typedef set<int, std::less<int>, new_allocator<int>, AVLTree> AvlSet;
AvlSet avl_set;
avl_set.insert(0);
assert(avl_set.find(0) != avl_set.end());
SplayMultiset splay_mset;
splay_mset.insert(2);
splay_mset.insert(2);
assert(splay_mset.count(2) == 2);
//--------------------------------------------
// 'optimize_size' option
//--------------------------------------------
//This option specifies an AVL tree based associative container
//disabling node size optimization.
typedef tree_assoc_options< tree_type<avl_tree>
, optimize_size<false> >::type AVLTreeNoSizeOpt;
//This option specifies an Splay tree based associative container
typedef tree_assoc_options< tree_type<splay_tree> >::type SplayTree;
//Now define new tree-based associative containers
//
//AVLTree based set container
typedef set<int, std::less<int>, new_allocator<int>, AVLTree> AvlSet;
//AVLTree based set container without size optimization
typedef set<int, std::less<int>, new_allocator<int>, AVLTreeNoSizeOpt> AvlSetNoSizeOpt;
//Splay tree based multiset container
typedef multiset<int, std::less<int>, new_allocator<int>, SplayTree> SplayMultiset;
//Use them
//
AvlSet avl_set;
avl_set.insert(0);
assert(avl_set.find(0) != avl_set.end());
AvlSetNoSizeOpt avl_set_no_szopt;
avl_set_no_szopt.insert(1);
avl_set_no_szopt.insert(1);
assert(avl_set_no_szopt.count(1) == 1);
SplayMultiset splay_mset;
splay_mset.insert(2);
splay_mset.insert(2);
assert(splay_mset.count(2) == 2);
return 0;
}
//]

View File

@@ -20,6 +20,10 @@ int main ()
{
using namespace boost::container;
//--------------------------------------------
// 'stored_size' option
//--------------------------------------------
//This option specifies that a vector that will use "unsigned char" as
//the type to store capacity or size internally.
typedef vector_options< stored_size<unsigned char> >::type size_option_t;
@@ -43,6 +47,10 @@ int main ()
assert(exception_thrown == true);
//--------------------------------------------
// 'growth_factor' option
//--------------------------------------------
//This option specifies that a vector will increase its capacity 50%
//each time the previous capacity was exhausted.
typedef vector_options< growth_factor<growth_factor_50> >::type growth_50_option_t;