source:
doc/papers/general/evaluation/cpp-stack.hpp
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151c8db
Last change on this file since 151c8db was 4c80a75, checked in by , 6 years ago | |
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[604e76d] | 1 | #pragma once |
2 | #include <utility> | |
3 | ||
[81e8ab0] | 4 | template<typename T> struct stack { |
[604e76d] | 5 | struct node { |
6 | T value; | |
[81e8ab0] | 7 | node * next; |
8 | node( const T & v, node * n = nullptr ) : value( v ), next( n ) {} | |
[604e76d] | 9 | }; |
[81e8ab0] | 10 | node * head; |
11 | ||
[4c80a75] | 12 | void copy( const stack<T> & o ) { |
13 | node ** cr = &head; | |
14 | for ( node * nx = o.head; nx; nx = nx->next ) { | |
15 | *cr = new node{ nx->value }; /***/ | |
16 | cr = &(*cr)->next; | |
17 | } | |
18 | *cr = nullptr; | |
19 | } | |
[604e76d] | 20 | |
21 | void clear() { | |
[ac4dad2] | 22 | for ( node * nx = head; nx; ) { |
23 | node * cr = nx; | |
24 | nx = cr->next; | |
25 | delete cr; | |
[604e76d] | 26 | } |
27 | head = nullptr; | |
28 | } | |
29 | ||
[4c80a75] | 30 | stack() : head( nullptr ) {} |
31 | stack( const stack<T> & o ) { copy( o ); } | |
[604e76d] | 32 | ~stack() { clear(); } |
33 | ||
[4c80a75] | 34 | stack & operator=( const stack<T> & o ) { |
[604e76d] | 35 | if ( this == &o ) return *this; |
36 | clear(); | |
[81e8ab0] | 37 | copy( o ); |
[604e76d] | 38 | return *this; |
39 | } | |
40 | ||
[4c80a75] | 41 | bool empty() const { |
42 | return head == nullptr; | |
43 | } | |
[604e76d] | 44 | |
[4c80a75] | 45 | void push( const T & value ) { |
46 | head = new node{ value, head }; /***/ | |
47 | } | |
[604e76d] | 48 | |
49 | T pop() { | |
[81e8ab0] | 50 | node * n = head; |
[604e76d] | 51 | head = n->next; |
[81e8ab0] | 52 | T v = std::move( n->value ); |
[604e76d] | 53 | delete n; |
[81e8ab0] | 54 | return v; |
[604e76d] | 55 | } |
56 | }; |
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