Adds inline specifier to itertools callable objects in headers

Related to issue #104

Author: Ryan Haining

cppitertools/accumulate.hpp

@@ -17,7 +17,7 @@ namespace iter {
 
     using AccumulateFn = IterToolFnOptionalBindSecond<Accumulator, std::plus<>>;
   }
-  constexpr impl::AccumulateFn accumulate{};
+  inline constexpr impl::AccumulateFn accumulate{};
 }
 
 template <typename Container, typename AccumulateFunc>

cppitertools/batched.hpp

@@ -20,7 +20,7 @@ namespace iter {
 
     using BatchedFn = IterToolFnBindSizeTSecond<Batcher>;
   }
-  constexpr impl::BatchedFn batched{};
+  inline constexpr impl::BatchedFn batched{};
 }
 
 template <typename Container>

cppitertools/chunked.hpp

@@ -20,7 +20,7 @@ namespace iter {
 
     using ChunkedFn = IterToolFnBindSizeTSecond<Chunker>;
   }
-  constexpr impl::ChunkedFn chunked{};
+  inline constexpr impl::ChunkedFn chunked{};
 }
 
 template <typename Container>

cppitertools/combinations.hpp

@@ -15,7 +15,7 @@ namespace iter {
 
     using CombinationsFn = IterToolFnBindSizeTSecond<Combinator>;
   }
-  constexpr impl::CombinationsFn combinations{};
+  inline constexpr impl::CombinationsFn combinations{};
 }
 
 template <typename Container>

cppitertools/combinations_with_replacement.hpp

@@ -15,7 +15,7 @@ namespace iter {
     using CombinationsWithReplacementFn =
         IterToolFnBindSizeTSecond<CombinatorWithReplacement>;
   }
-  constexpr impl::CombinationsWithReplacementFn combinations_with_replacement{};
+  inline constexpr impl::CombinationsWithReplacementFn combinations_with_replacement{};
 }
 
 template <typename Container>

cppitertools/cycle.hpp

@@ -15,7 +15,7 @@ namespace iter {
 
     using CycleFn = IterToolFn<Cycler>;
   }
-  constexpr impl::CycleFn cycle{};
+  inline constexpr impl::CycleFn cycle{};
 }
 
 template <typename Container>

cppitertools/dropwhile.hpp

@@ -16,7 +16,7 @@ namespace iter {
 
     using DropWhileFn = IterToolFnOptionalBindFirst<Dropper, BoolTester>;
   }
-  constexpr impl::DropWhileFn dropwhile{};
+  inline constexpr impl::DropWhileFn dropwhile{};
 }
 
 template <typename FilterFunc, typename Container>

cppitertools/enumerate.hpp

@@ -33,7 +33,7 @@ namespace iter {
 
     using EnumerateFn = IterToolFnOptionalBindSecond<Enumerable, std::size_t>;
   }
-  constexpr impl::EnumerateFn enumerate{};
+  inline constexpr impl::EnumerateFn enumerate{};
 }
 
 namespace std {

cppitertools/filter.hpp

@@ -24,7 +24,7 @@ namespace iter {
     using FilterFn = IterToolFnOptionalBindFirst<Filtered, BoolTester>;
   }
 
-  constexpr impl::FilterFn filter{};
+  inline constexpr impl::FilterFn filter{};
 }
 
 template <typename FilterFunc, typename Container>

cppitertools/filterfalse.hpp

@@ -38,7 +38,7 @@ namespace iter {
 
     using FilterFalseFn = IterToolFnOptionalBindFirst<FilterFalsed, BoolTester>;
   }
-  constexpr impl::FilterFalseFn filterfalse{};
+  inline constexpr impl::FilterFalseFn filterfalse{};
 }
 
 // Delegates to Filtered with PredicateFlipper<FilterFunc>

cppitertools/groupby.hpp

@@ -20,7 +20,7 @@ namespace iter {
 
     using GroupByFn = IterToolFnOptionalBindSecond<GroupProducer, Identity>;
   }
-  constexpr impl::GroupByFn groupby{};
+  inline constexpr impl::GroupByFn groupby{};
 }
 
 template <typename Container, typename KeyFunc>

cppitertools/imap.hpp

@@ -21,7 +21,7 @@ namespace iter {
       using PipeableAndBindFirst<IMapFn>::operator();
     };
   }
-  constexpr impl::IMapFn imap{};
+  inline constexpr impl::IMapFn imap{};
 }
 
 #endif

cppitertools/permutations.hpp

@@ -17,7 +17,7 @@ namespace iter {
     class Permuter;
     using PermutationsFn = IterToolFn<Permuter>;
   }
-  constexpr impl::PermutationsFn permutations{};
+  inline constexpr impl::PermutationsFn permutations{};
 }
 
 template <typename Container>

cppitertools/powerset.hpp

@@ -18,7 +18,7 @@ namespace iter {
 
     using PowersetFn = IterToolFn<Powersetter>;
   }
-  constexpr impl::PowersetFn powerset{};
+  inline constexpr impl::PowersetFn powerset{};
 }
 
 template <typename Container>

cppitertools/reversed.hpp

@@ -45,7 +45,7 @@ namespace iter {
 
     using ReversedFn = IterToolFn<Reverser>;
   }
-  constexpr impl::ReversedFn reversed{};
+  inline constexpr impl::ReversedFn reversed{};
 }
 
 template <typename Container>

cppitertools/slice.hpp

@@ -172,7 +172,7 @@ struct iter::impl::SliceFn {
 };
 
 namespace iter {
-  constexpr impl::SliceFn slice{};
+  inline constexpr impl::SliceFn slice{};
 }
 
 #endif

cppitertools/sliding_window.hpp

@@ -16,7 +16,7 @@ namespace iter {
     class WindowSlider;
     using SlidingWindowFn = IterToolFnBindSizeTSecond<WindowSlider>;
   }
-  constexpr impl::SlidingWindowFn sliding_window{};
+  inline constexpr impl::SlidingWindowFn sliding_window{};
 }
 
 template <typename Container>

cppitertools/sorted.hpp

@@ -15,7 +15,7 @@ namespace iter {
     class SortedView;
     using SortedFn = IterToolFnOptionalBindSecond<SortedView, std::less<>>;
   }
-  constexpr impl::SortedFn sorted{};
+  inline constexpr impl::SortedFn sorted{};
 }
 
 template <typename Container, typename CompareFunc>

cppitertools/starmap.hpp

@@ -252,7 +252,7 @@ struct iter::impl::StarMapFn : PipeableAndBindFirst<StarMapFn> {
 };
 
 namespace iter {
-  constexpr impl::StarMapFn starmap{};
+  inline constexpr impl::StarMapFn starmap{};
 }
 
 #endif

cppitertools/takewhile.hpp

@@ -16,7 +16,7 @@ namespace iter {
 
     using TakeWhileFn = IterToolFnOptionalBindFirst<Taker, BoolTester>;
   }
-  constexpr impl::TakeWhileFn takewhile{};
+  inline constexpr impl::TakeWhileFn takewhile{};
 }
 
 template <typename FilterFunc, typename Container>

cppitertools/unique_everseen.hpp

@@ -45,7 +45,7 @@ namespace iter {
     };
   }
 
-  constexpr impl::UniqueEverseenFn unique_everseen{};
+  inline constexpr impl::UniqueEverseenFn unique_everseen{};
 }
 
 #endif

cppitertools/unique_justseen.hpp

@@ -23,7 +23,7 @@ namespace iter {
       }
     };
   }
-  constexpr impl::UniqueJustseenFn unique_justseen{};
+  inline constexpr impl::UniqueJustseenFn unique_justseen{};
 }
 
 #endif