Add test for char to char32_t mapping

tests/expectations/both/char.c

@@ -0,0 +1,11 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <uchar.h>
+
+typedef struct Foo {
+  char32_t a;
+} Foo;
+
+void root(Foo a);

tests/expectations/both/char.compat.c

@@ -0,0 +1,19 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <uchar.h>
+
+typedef struct Foo {
+  char32_t a;
+} Foo;
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+void root(Foo a);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif // __cplusplus

tests/expectations/char.c

@@ -0,0 +1,11 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <uchar.h>
+
+typedef struct {
+  char32_t a;
+} Foo;
+
+void root(Foo a);

tests/expectations/char.compat.c

@@ -0,0 +1,19 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <uchar.h>
+
+typedef struct {
+  char32_t a;
+} Foo;
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+void root(Foo a);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif // __cplusplus

tests/expectations/char.cpp

@@ -0,0 +1,14 @@
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <new>
+
+struct Foo {
+  char32_t a;
+};
+
+extern "C" {
+
+void root(Foo a);
+
+} // extern "C"

tests/expectations/tag/char.c

@@ -0,0 +1,11 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <uchar.h>
+
+struct Foo {
+  char32_t a;
+};
+
+void root(struct Foo a);

tests/expectations/tag/char.compat.c

@@ -0,0 +1,19 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <uchar.h>
+
+struct Foo {
+  char32_t a;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+void root(struct Foo a);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif // __cplusplus

tests/rust/char.rs

@@ -0,0 +1,7 @@
+#[repr(C)]
+struct Foo {
+    a: char,
+}
+
+#[no_mangle]
+pub extern "C" fn root(a: Foo) {}