ast-exporter: Add macro_fns.c snapshot test

Author: Rua

c2rust-transpile/tests/snapshots.rs

@@ -405,6 +405,11 @@ fn test_lift_const() {
     transpile("lift_const.c").run();
 }
 
+#[test]
+fn test_macro_fns() {
+    transpile("macro_fns.c").run();
+}
+
 #[test]
 fn test_macrocase() {
     transpile("macrocase.c").run();

c2rust-transpile/tests/snapshots/macro_fns.c

@@ -0,0 +1,21 @@
+#define CONST 42
+
+#define ID(x) x
+#define PAREN(x) (x)
+#define LIT_ID ID(42)
+#define LIT_PAREN PAREN(42)
+#define CONST_ID ID(CONST)
+#define CONST_PAREN PAREN(CONST)
+#define NESTED_ID(x) ID(x)
+#define NESTED_PAREN(x) PAREN(x)
+
+void basic(void) {
+    int id = ID(42);
+    int paren = PAREN(42);
+    int lit_id = LIT_ID;
+    int lit_paren = LIT_PAREN;
+    int const_id = CONST_ID;
+    int const_paren = CONST_PAREN;
+    int nested_id = NESTED_ID(42);
+    int nested_paren = NESTED_PAREN(42);
+}

c2rust-transpile/tests/snapshots/snapshots__transpile@macro_fns.c.2021.clang15.snap

@@ -0,0 +1,26 @@
+---
+source: c2rust-transpile/tests/snapshots.rs
+expression: cat tests/snapshots/macro_fns.2021.clang15.rs
+---
+#![allow(
+    clippy::missing_safety_doc,
+    dead_code,
+    non_camel_case_types,
+    non_snake_case,
+    non_upper_case_globals,
+    unused_assignments,
+    unused_mut
+)]
+pub const LIT_PAREN: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+pub const CONST_PAREN: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+#[no_mangle]
+pub unsafe extern "C" fn basic() {
+    let mut id: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut paren: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut lit_id: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut lit_paren: ::core::ffi::c_int = LIT_PAREN;
+    let mut const_id: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut const_paren: ::core::ffi::c_int = CONST_PAREN;
+    let mut nested_id: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut nested_paren: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+}

c2rust-transpile/tests/snapshots/snapshots__transpile@macro_fns.c.2024.clang15.snap

@@ -0,0 +1,27 @@
+---
+source: c2rust-transpile/tests/snapshots.rs
+expression: cat tests/snapshots/macro_fns.2024.clang15.rs
+---
+#![allow(
+    clippy::missing_safety_doc,
+    dead_code,
+    non_camel_case_types,
+    non_snake_case,
+    non_upper_case_globals,
+    unsafe_op_in_unsafe_fn,
+    unused_assignments,
+    unused_mut
+)]
+pub const LIT_PAREN: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+pub const CONST_PAREN: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn basic() {
+    let mut id: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut paren: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut lit_id: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut lit_paren: ::core::ffi::c_int = LIT_PAREN;
+    let mut const_id: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut const_paren: ::core::ffi::c_int = CONST_PAREN;
+    let mut nested_id: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+    let mut nested_paren: ::core::ffi::c_int = 42 as ::core::ffi::c_int;
+}