crubit: introduce case! macro for `test_format_ty_for_cc_successes`
PiperOrigin-RevId: 662832171
Change-Id: I842128bf6ecc4c799e168806e5b200bcbe269152
diff --git a/cc_bindings_from_rs/bindings.rs b/cc_bindings_from_rs/bindings.rs
index b23e2bc..996f642 100644
--- a/cc_bindings_from_rs/bindings.rs
+++ b/cc_bindings_from_rs/bindings.rs
@@ -7455,6 +7455,43 @@
/// bindings.
#[test]
fn test_format_ty_for_cc_successes() {
+ #[allow(dead_code)]
+ struct FormatCcExpectation {
+ expected_tokens: &'static str,
+ expected_includes: Vec<&'static str>,
+ expected_prereq_def: Option<&'static str>,
+ expected_prereq_fwd_decl: Option<&'static str>,
+ }
+
+ // Helper macro to create a `FormatCcExpectation`s. Handles all a variation of
+ // relevant fields (e.g. expected includes or forward decls).
+ #[allow(unused_macros)]
+ macro_rules! case {
+ (rs: $input_rust_ty:expr, cc: $expected_cc_ty:expr, includes: [$($includes:expr),*], prereq_def: $expected_prereq_def:expr, prereq_fwd_decl: $expected_prereq_fwd_decl:expr) => {
+ (
+ $input_rust_ty,
+ FormatCcExpectation {
+ expected_tokens: $expected_cc_ty,
+ expected_includes: Vec::<&'static str>::from([$($includes),*]),
+ expected_prereq_def: $expected_prereq_def,
+ expected_prereq_fwd_decl: $expected_prereq_fwd_decl,
+ }
+ )
+ };
+ (rs: $input_rust_ty:expr, cc: $expected_cc_ty:expr) => {
+ case!(rs: $input_rust_ty, cc: $expected_cc_ty, includes: [], prereq_def: None, prereq_fwd_decl: None)
+ };
+ (rs: $input_rust_ty:expr, cc: $expected_cc_ty:expr, includes: [$($includes:expr),*]) => {
+ case!(rs: $input_rust_ty, cc: $expected_cc_ty, includes: [$($includes),*], prereq_def: None, prereq_fwd_decl: None)
+ };
+ (rs: $input_rust_ty:expr, cc: $expected_cc_ty:expr, includes: [$($includes:expr),*], prereq_def: $expected_prereq_def:expr) => {
+ case!(rs: $input_rust_ty, cc: $expected_cc_ty, includes: [$($includes),*], prereq_def: Some($expected_prereq_def), prereq_fwd_decl: None)
+ };
+ (rs: $input_rust_ty:expr, cc: $expected_cc_ty:expr, includes: [$($includes:expr),*], prereq_fwd_decl: $expected_prereq_fwd_decl:expr) => {
+ case!(rs: $input_rust_ty, cc: $expected_cc_ty, includes: [$($includes),*], prereq_def: None, prereq_fwd_decl: Some($expected_prereq_fwd_decl))
+ };
+ }
+
let testcases = [
// ( <Rust type>, (<expected C++ type>,
// <expected #include>,
