Add C++ transpiler backend with build-time generated tests

Co-Authored-By: zemanadam893@gmail.com <zemanadam893@gmail.com>

Author: devin-ai-integration[bot]

src/engine/CMakeLists.txt

@@ -45,3 +45,4 @@ target_sources(scratchcpp
 )
 
 add_subdirectory(internal/llvm)
+add_subdirectory(internal/cpp)

src/engine/internal/cpp/CMakeLists.txt

@@ -0,0 +1,25 @@
+target_sources(scratchcpp
+  PRIVATE
+    cppprelude.h
+    cppruntime.cpp
+    cppruntime.h
+    cppcodebuilder.cpp
+    cppcodebuilder.h
+    cppcodebuilderfactory.cpp
+    cppcodebuilderfactory.h
+    cppregister.h
+    cppcompilercontext.cpp
+    cppcompilercontext.h
+    cppexecutablecode.cpp
+    cppexecutablecode.h
+    cppexecutioncontext.cpp
+    cppexecutioncontext.h
+)
+
+# Embed the runtime prelude into the library, it's a part of the generated code
+set(CPP_PRELUDE_HEADER ${CMAKE_CURRENT_BINARY_DIR}/cppprelude_source.h)
+file(READ ${CMAKE_CURRENT_SOURCE_DIR}/cppprelude.h CPP_PRELUDE_CONTENT)
+file(WRITE ${CPP_PRELUDE_HEADER} "// Generated from cppprelude.h\n#pragma once\n\nstatic const char *CPP_PRELUDE_SOURCE = R\"scpp_raw(${CPP_PRELUDE_CONTENT})scpp_raw\";\n")
+set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/cppprelude.h)
+
+target_include_directories(scratchcpp PRIVATE ${CMAKE_CURRENT_BINARY_DIR})