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fix Issue #49

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Bolero-MURAKAMI 2013-09-13 17:22:10 +09:00
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source/libs/string/basic_string/compare.rst Normal file
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.. _sprout-string-basic_string-compare:
###############################################################################
compare
###############################################################################
Interface
========================================
.. sourcecode:: c++
template<std::size_t N2>
SPROUT_CONSTEXPR int compare(basic_string<T, N2, Traits> const& str) const;
Effects
========================================
| Determines the effective length rlen of the strings to compare as the smallest of ``size()`` and ``str.size()``.
| The function then compares the two strings by calling ``traits_type::compare(data(), str.data(), rlen)``.
Examples
========================================
.. sourcecode:: c++
#include <sprout/string.hpp>
using namespace sprout;
SPROUT_STATIC_CONSTEXPR auto x = string<8>("homuhomu");
SPROUT_STATIC_CONSTEXPR auto y = string<8>("madocchi");
SPROUT_STATIC_CONSTEXPR auto result = x.compare(y);
static_assert(result < 0, "x is less than y.");
Complexity
========================================
| Recursive function invocations in *O(logN)* (logarithmic) depth.
.. note::
The current implementation is incomplete. *O(N)* (linear) depth.
----
Interface
========================================
.. sourcecode:: c++
template<std::size_t N2>
SPROUT_CONSTEXPR int compare(size_type pos1, size_type n1, basic_string<T, N2, Traits> const& str) const;
Returns
========================================
| ``basic_string(*this, pos1, n1).compare(str)``.
----
Interface
========================================
.. sourcecode:: c++
template<std::size_t N2>
SPROUT_CONSTEXPR int compare(size_type pos1, size_type n1, basic_string<T, N2, Traits> const& str, size_type pos2, size_type n2) const;
Returns
========================================
| ``basic_string(*this, pos1, n1).compare(basic_string<T, N2, Traits>(str, pos2, n2))``.
----
Interface
========================================
.. sourcecode:: c++
SPROUT_CONSTEXPR int compare(value_type const* s) const;
Returns
========================================
| ``compare(basic_string(s))``.
----
Interface
========================================
.. sourcecode:: c++
SPROUT_CONSTEXPR int compare(size_type pos1, size_type n1, value_type const* s) const;
Returns
========================================
| ``basic_string(*this, pos, n1).compare(basic_string(s))``.
----
Interface
========================================
.. sourcecode:: c++
SPROUT_CONSTEXPR int compare(size_type pos1, size_type n1, value_type const* s, size_type n2) const;
Returns
========================================
| ``basic_string(*this, pos, n1).compare(basic_string(s, n2))``.
Header
========================================
| ``sprout/string/string.hpp``
| Convenience header: ``sprout/string.hpp``