summaryrefslogtreecommitdiff
path: root/o3tl
diff options
context:
space:
mode:
authorThorsten Behrens <tbehrens@novell.com>2011-02-08 20:25:25 +0100
committerThorsten Behrens <tbehrens@novell.com>2011-02-08 20:26:26 +0100
commitb14a690506b0786083714489099bc995a464df97 (patch)
tree669783a5393d0fcc14b15308127e0c5053d85b75 /o3tl
parent52c63c207dc0d6f5569953bb351f2cbf2cd3c33d (diff)
Added iota to stl compat header, switch canvas to use that
Diffstat (limited to 'o3tl')
-rw-r--r--o3tl/inc/o3tl/compat_functional.hxx20
1 files changed, 19 insertions, 1 deletions
diff --git a/o3tl/inc/o3tl/compat_functional.hxx b/o3tl/inc/o3tl/compat_functional.hxx
index 40c78ff9b449..00ae33cb23bb 100644
--- a/o3tl/inc/o3tl/compat_functional.hxx
+++ b/o3tl/inc/o3tl/compat_functional.hxx
@@ -25,7 +25,8 @@
*/
/*
- * Lifted and paraphrased from STLport
+ * Lifted and paraphrased from STLport - with additions from Fridrich
+ * Strba and Thorsten Behrens
*/
#ifndef INCLUDED_O3TL_COMPAT_FUNCTIONAL_HXX
@@ -36,6 +37,7 @@
namespace o3tl
{
+/// Identity functor - return the input value
template<class T>
struct identity : public std::unary_function<T, T>
{
@@ -45,6 +47,7 @@ struct identity : public std::unary_function<T, T>
}
};
+/// Functor, given two parameters, return the first
template<class T1,class T2>
struct project1st : public std::binary_function<T1, T2, T1>
{
@@ -54,6 +57,7 @@ struct project1st : public std::binary_function<T1, T2, T1>
}
};
+/// Functor, given two parameters, return the second
template<class T1,class T2>
struct project2nd : public std::binary_function<T1, T2, T2>
{
@@ -63,6 +67,7 @@ struct project2nd : public std::binary_function<T1, T2, T2>
}
};
+/// Select first value of a pair
template<class P>
struct select1st : public std::unary_function<P, typename P::first_type>
{
@@ -72,6 +77,7 @@ struct select1st : public std::unary_function<P, typename P::first_type>
}
};
+/// Select second value of a pair
template<class P>
struct select2nd : public std::unary_function<P, typename P::second_type>
{
@@ -81,6 +87,7 @@ struct select2nd : public std::unary_function<P, typename P::second_type>
}
};
+/// Call F1 with the result of F2 applied to the one input parameter
template<class F1, class F2>
class unary_compose : public std::unary_function<typename F2::argument_type, typename F1::result_type>
{
@@ -97,12 +104,14 @@ class unary_compose : public std::unary_function<typename F2::argument_type, typ
F2 ftor2;
};
+/// Create functor that calls F1 with the result of F2 applied to the one input parameter
template<class F1, class F2>
inline unary_compose<F1, F2> compose1(const F1& fnction1, const F2& fnction2)
{
return (unary_compose<F1, F2>(fnction1, fnction2));
}
+/// Calls F2 and F3 for the two args of F1, respectively
template<class F1, class F2, class F3>
class binary_compose : public std::unary_function<typename F2::argument_type,typename F1::result_type>
{
@@ -120,12 +129,21 @@ class binary_compose : public std::unary_function<typename F2::argument_type,typ
F3 ftor3;
};
+/// Creates functor that calls F2 and F3 for the two args of F1, respectively
template<class F1, class F2, class F3>
inline binary_compose<F1, F2, F3> compose2(const F1& fnction1, const F2& fnction2, const F3& fnction3)
{
return (binary_compose<F1, F2, F3>(fnction1, fnction2, fnction3));
}
+/// Algo that assigns val, val+1, ... to the given range
+template<typename FwdIter, typename ValueType>
+inline void iota(FwdIter first, FwdIter last, ValueType val)
+{
+ while(first != last)
+ *first++ = val++;
+}
+
} // namespace o3tl
#endif