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[DO NOT MERGE] Example of how to add a protocol #53

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681f7c3
Example of how to add a protocol
jbcoe Apr 1, 2026
75a2f08
Fix for operator() which needs mangling (for now)
jbcoe Apr 1, 2026
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7 changes: 6 additions & 1 deletion CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -116,14 +116,19 @@ if(XYZ_PROTOCOL_IS_NOT_SUBPROJECT)
CLASS_NAME C INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/interface_C.h
HEADER interface_C.h
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/generated/protocol_C.h ${OPT_MANUAL_VTABLE})
xyz_generate_protocol(
CLASS_NAME Demo INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/demo.h
HEADER demo.h
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/generated/protocol_demo.h ${OPT_MANUAL_VTABLE})

add_custom_target(
generate_protocols
DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/generated/protocol_A.h
${CMAKE_CURRENT_BINARY_DIR}/generated/protocol_A_virtual.h
${CMAKE_CURRENT_BINARY_DIR}/generated/protocol_A_manual.h
${CMAKE_CURRENT_BINARY_DIR}/generated/protocol_B.h
${CMAKE_CURRENT_BINARY_DIR}/generated/protocol_C.h)
${CMAKE_CURRENT_BINARY_DIR}/generated/protocol_C.h
${CMAKE_CURRENT_BINARY_DIR}/generated/protocol_demo.h)

xyz_add_test(
NAME
Expand Down
12 changes: 12 additions & 0 deletions demo.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
#ifndef XYZ_PROTOCOL_DEMO_H
#define XYZ_PROTOCOL_DEMO_H

namespace xyz {

struct Demo {
int call(int) const;
};

} // namespace xyz

#endif // XYZ_PROTOCOL_DEMO_H
10 changes: 10 additions & 0 deletions protocol_test.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "generated/protocol_A.h"
#include "generated/protocol_B.h"
#include "generated/protocol_C.h"
#include "generated/protocol_demo.h"
#include "tracking_allocator.h"

namespace {
Expand Down Expand Up @@ -626,4 +627,13 @@ TEST(ProtocolViewTest, ViewMoveIsStandard) {
EXPECT_EQ(view2.name(), "move_test");
}

struct Demoic {
int call(int x) const { return x * 2; }
};

TEST(ProtocolDemoTest, DemoFunction) {
xyz::protocol<xyz::Demo> demo(std::in_place_type<Demoic>);
EXPECT_EQ(demo.call(5), 10);
}

} // namespace
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