Define float16_t type in public headers (OpenNMT#841)

* Define float16_t type in public headers

The type was hidden in commit
OpenNMT@b3038b8,
but it is actually required by some public functions.

* Cleanup install rule

CMakeLists.txt

@@ -473,7 +473,7 @@ install(
   LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
   )
 install(
-  DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/ctranslate2"
+  DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/"
   DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
   FILES_MATCHING PATTERN "*.h*"
   )

include/ctranslate2/types.h

@@ -3,11 +3,14 @@
 #include <cstdint>
 #include <string>
 
+#include <half_float/half.hpp>
+
 #include "devices.h"
 
 namespace ctranslate2 {
 
   using dim_t = int64_t;  // This type should be signed.
+  using float16_t = half_float::half;
 
   enum class DataType {
     FLOAT,

src/cuda/helpers.h

@@ -7,7 +7,6 @@
 #include "ctranslate2/types.h"
 
 #include "utils.h"
-#include "type_dispatch.h"
 
 #if !defined(__CUDACC__) || !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 530
 #  define CUDA_CAN_USE_HALF 1

src/ops/multinomial_cpu.cc

@@ -2,8 +2,6 @@
 
 #include "ctranslate2/random.h"
 
-#include "type_dispatch.h"
-
 namespace ctranslate2 {
   namespace ops {
 

src/ops/multinomial_gpu.cu

@@ -3,7 +3,6 @@
 #include <cub/block/block_reduce.cuh>
 #include <cub/block/block_scan.cuh>
 
-#include "type_dispatch.h"
 #include "cuda/helpers.h"
 #include "cuda/random.h"
 

src/type_dispatch.h

@@ -1,13 +1,9 @@
 #pragma once
 
-#include <half_float/half.hpp>
-
 #include "ctranslate2/types.h"
 
 namespace ctranslate2 {
 
-  using float16_t = half_float::half;
-
   // Inspired by
   // https://github.com/tensorflow/tensorflow/blob/master/tensorflow/core/framework/types.h
   // for matching enum values and C++ types.

tests/CMakeLists.txt

@@ -16,7 +16,6 @@ add_executable(ctranslate2_test
   test.cc)
 target_include_directories(ctranslate2_test PRIVATE
   ${CMAKE_CURRENT_SOURCE_DIR}/../src
-  ${CMAKE_CURRENT_SOURCE_DIR}/../third_party
   )
 target_link_libraries(ctranslate2_test
   ${PROJECT_NAME}