new-envwith_gc
Last change
on this file since 1cdfa82 was
860f19f,
checked in by Aaron Moss <a3moss@…>, 7 years ago
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Clean up code edits
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-
Property mode set to
100644
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File size:
979 bytes
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1 | #include "cpp-vstack.hpp" |
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2 | #include <utility> |
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3 | |
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4 | stack::node::node( const object & v, node * n ) : value( v.new_copy() ), next( n ) {} |
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5 | |
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6 | void stack::clear() { |
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7 | for ( node * next = head; next; ) { |
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8 | node * crnt = next; |
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9 | next = crnt->next; |
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10 | delete crnt; |
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11 | } |
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12 | head = nullptr; |
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13 | } |
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14 | |
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15 | void stack::copy( const stack & o ) { |
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16 | node ** crnt = &head; |
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17 | for ( node * next = o.head; next; next = next->next ) { |
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18 | *crnt = new node{ *next->value }; /***/ |
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19 | crnt = &(*crnt)->next; |
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20 | } |
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21 | *crnt = nullptr; |
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22 | } |
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23 | |
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24 | stack::stack() : head( nullptr ) {} |
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25 | stack::stack( const stack & o ) { copy( o ); } |
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26 | stack::~stack() { clear(); } |
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27 | |
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28 | stack & stack::operator=( const stack & o ) { |
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29 | if ( this == &o ) return *this; |
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30 | clear(); |
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31 | copy( o ); |
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32 | return *this; |
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33 | } |
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34 | |
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35 | bool stack::empty() const { return head == nullptr; } |
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36 | |
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37 | void stack::push( const object & value ) { head = new node{ value, head }; /***/ } |
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38 | |
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39 | ptr<object> stack::pop() { |
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40 | node * n = head; |
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41 | head = n->next; |
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42 | ptr<object> v = std::move( n->value ); |
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43 | delete n; |
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44 | return v; |
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45 | } |
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