Add --blocklist-file option (#2097)

Update Item to hold a `clang::SourceLocation` and use this to allow
blocklisting based on filename.

The existing code has a special case that always maps <stdint.h> integer
types to corresponding Rust integer types, even if the C types are
blocklisted.  To match this special case behaviour, also treat these
C <stdint.h> types as being eligible for derived Copy/Clone/Debug
traits.

Fixes #2096

3 files changed, 51 insertions, 0 deletions

diff --git a/tests/headers/blocklist-file.hpp b/tests/headers/blocklist-file.hpp
new file mode 100644
index 00000000..ad8bcd66
--- /dev/null
+++ b/tests/headers/blocklist-file.hpp
@@ -0,0 +1,18 @@
+// bindgen-flags: --blocklist-file ".*/blocklisted/file.*" -- -Itests/headers
+
+// Forward declaration of struct that's defined in a blocklisted file.
+struct StructWithBlocklistedDefinition;
+
+#include "blocklisted/file.hpp"
+#include "blocklisted/fake-stdint.h"
+
+struct SizedIntegers {
+    uint8_t x;
+    uint16_t y;
+    uint32_t z;
+};
+
+// Actual definition of struct that has a forward declaration in a blocklisted file.
+struct StructWithBlocklistedFwdDecl {
+    uint8_t b;
+};
diff --git a/tests/headers/blocklisted/fake-stdint.h b/tests/headers/blocklisted/fake-stdint.h
new file mode 100644
index 00000000..a8cfe010
--- /dev/null
+++ b/tests/headers/blocklisted/fake-stdint.h
@@ -0,0 +1,7 @@
+// <stdint.h>-like types get special treatment even when blocklisted.
+typedef signed char      int8_t;
+typedef unsigned char    uint8_t;
+typedef signed short     int16_t;
+typedef unsigned short   uint16_t;
+typedef signed int       int32_t;
+typedef unsigned int     uint32_t;
diff --git a/tests/headers/blocklisted/file.hpp b/tests/headers/blocklisted/file.hpp
new file mode 100644
index 00000000..4bcb589e
--- /dev/null
+++ b/tests/headers/blocklisted/file.hpp
@@ -0,0 +1,26 @@
+void SomeFunction();
+extern int someVar;
+#define SOME_DEFUN 123
+
+class someClass {
+  void somePrivateMethod();
+public:
+  void somePublicMethod(int foo);
+};
+
+extern "C" void ExternFunction();
+
+namespace foo {
+  void NamespacedFunction();
+}
+
+namespace bar {
+  void NamespacedFunction();
+}
+
+
+struct StructWithBlocklistedFwdDecl;
+
+struct StructWithBlocklistedDefinition {
+    StructWithBlocklistedFwdDecl* other;
+};