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#include <datatype99.h>
#include <stdio.h>
// Deriver implementation {
#define DATATYPE99_DERIVE_Print_IMPL(name, variants) \
ML99_prefixedBlock( \
v(inline static void name##_print(name self, FILE *stream)), \
ML99_prefixedBlock( \
v(match(self)), \
ML99_listMapInPlace(ML99_compose(v(genArm), v(ML99_untuple)), v(variants))))
#define genArm_IMPL(tag, sig) \
ML99_TERMS( \
DATATYPE99_assertAttrIsPresent(v(tag##_Print_fmt)), \
ML99_prefixedBlock( \
DATATYPE99_of(v(tag), ML99_indexedArgs(ML99_listLen(v(sig)))), \
ML99_invokeStmt(v(fprintf), v(stream), DATATYPE99_attrValue(v(tag##_Print_fmt)))))
#define genArm_ARITY 1
// (Deriver implementation)
#define Foo_Print_fmt attr("Foo(\"%s\")", *_0)
#define Bar_Print_fmt attr("Bar(%d, %d)", *_0, *_1)
// clang-format off
datatype(
derive(Print),
MyType,
(Foo, const char *),
(Bar, int, int)
);
// clang-format on
#undef Foo_Print_fmt
#undef Bar_Print_fmt
/*
* Output:
*
* Foo("hello world")
* Bar(3, 5)
*/
int main(void) {
MyType_print(Foo("hello world"), stdout);
puts("");
MyType_print(Bar(3, 5), stdout);
puts("");
return 0;
}
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