Move smath.hpp to smath/smath.hpp

This is done in preparation for optional interop headers for different
libraries.

Signed-off-by: Slendi <slendi@socopon.com>

CMakeLists.txt

@@ -7,6 +7,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 option(SMATH_BUILD_EXAMPLES "Build example programs" ON)
 option(SMATH_BUILD_TESTS "Build unit tests" ON)
 option(SMATH_BUILD_MODULES "Enable C++20 modules support" OFF)
+option(SMATH_ENABLE_LEGACY_HEADER "Install legacy include <smath.hpp> shim" OFF)
 
 if(SMATH_BUILD_MODULES)
 	message(STATUS "Building smath C++ module")
@@ -17,6 +18,7 @@ add_library(smath INTERFACE)
 target_include_directories(smath
 	INTERFACE
 		$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+		$<$<BOOL:${SMATH_ENABLE_LEGACY_HEADER}>:$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>>
 		$<INSTALL_INTERFACE:include>
 )
 add_library(smath::smath ALIAS smath)
@@ -27,6 +29,16 @@ install(TARGETS smath
 )
 install(DIRECTORY include/ DESTINATION include)
 
+if(SMATH_ENABLE_LEGACY_HEADER)
+	file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/include")
+	configure_file(
+		"${CMAKE_CURRENT_SOURCE_DIR}/cmake/smath_legacy_header.hpp.in"
+		"${CMAKE_CURRENT_BINARY_DIR}/include/smath.hpp"
+		@ONLY
+	)
+	install(FILES "${CMAKE_CURRENT_BINARY_DIR}/include/smath.hpp" DESTINATION include)
+endif()
+
 install(EXPORT smathTargets
 	NAMESPACE smath::
 	FILE smathTargets.cmake
@@ -96,4 +108,3 @@ if(SMATH_BUILD_TESTS)
 	include(GoogleTest)
 	gtest_discover_tests(smath_tests)
 endif()
-

cmake/smath_legacy_header.hpp.in

@@ -0,0 +1,3 @@
+#pragma once
+
+#include <smath/smath.hpp>

examples/projection.cpp

@@ -10,7 +10,7 @@
 #include <Windows.h>
 #endif
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 using smath::Vec2;
 
 enum Color : uint8_t

examples/random_steps.cpp

@@ -22,7 +22,7 @@
 #include <print>
 #include <random>
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 auto main() -> int
 {

examples/tour.cpp

@@ -17,7 +17,7 @@
 
 // #define SMATH_IMPLICIT_CONVERSIONS
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 int main()
 {

flake.nix

@@ -57,8 +57,8 @@
 
           installPhase = ''
             runHook preInstall
-            mkdir -p $out/include
-            cp ../include/smath.hpp $out/include/
+            mkdir -p $out/include/smath
+            cp ../include/smath/smath.hpp $out/include/smath/
             runHook postInstall
           '';
 

src/modules/smath.cppm

@@ -1,6 +1,6 @@
 module;
 
-#include "smath.hpp"
+#include "smath/smath.hpp"
 
 export module smath;
 

tests/angles.cpp

@@ -1,6 +1,6 @@
 #include <gtest/gtest.h>
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 TEST(AngleReturnRadians, DegInput)
 {

tests/interop.cpp

@@ -2,7 +2,7 @@
 
 #include <gtest/gtest.h>
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 struct ExternalVec3f
 {

tests/vec.cpp

@@ -4,7 +4,7 @@
 
 #include <gtest/gtest.h>
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 using smath::Vec;
 using smath::Vec2;