transpile: tests: add compound literals tests, incl. address-taken ones

Author: kkysen

c2rust-transpile/tests/snapshots/compound_literals.c

@@ -0,0 +1,22 @@
+int static_single_int = (int) { 42 };
+int *static_single_int_ptr = &((int) { 42 });
+int *static_int_array_ptr = (int[]) { 42, 9001 };
+// Currently generates broken Rust code, see
+// https://github.com/immunant/c2rust/issues/1410
+//char *static_char_array_ptr = (char[]) { "hello" };
+
+#define SINGLE_INT ((int) { 42 })
+#define INT_ARRAY ((int[]) { 42, 9001 })
+#define CHAR_ARRAY ((char[]) { "hello" })
+
+void local_compound_literals() {
+    int single_int = (int) { 42 };
+    int *single_int_ptr = &((int) { 42 });
+    int *int_array_ptr = (int[]) { 42, 9001 };
+    char *char_array_ptr = (char[]) { "hello" };
+
+    int macro_single_int = SINGLE_INT;
+    int *macro_single_int_ptr = &SINGLE_INT;
+    int *macro_int_array_ptr = INT_ARRAY;
+    char *macro_char_array_ptr = CHAR_ARRAY;
+}

c2rust-transpile/tests/snapshots/snapshots__transpile@compound_literals.c.snap

@@ -0,0 +1,38 @@
+---
+source: c2rust-transpile/tests/snapshots.rs
+expression: cat tests/snapshots/compound_literals.rs
+input_file: c2rust-transpile/tests/snapshots/compound_literals.c
+---
+#![allow(
+    dead_code,
+    non_camel_case_types,
+    non_snake_case,
+    non_upper_case_globals,
+    unused_assignments,
+    unused_mut
+)]
+#[no_mangle]
+pub static mut static_single_int: core::ffi::c_int = 42;
+#[no_mangle]
+pub static mut static_single_int_ptr: *mut core::ffi::c_int =
+    &42 as *const core::ffi::c_int as *mut core::ffi::c_int;
+#[no_mangle]
+pub static mut static_int_array_ptr: *mut core::ffi::c_int = [42, 9001].as_ptr() as *mut _;
+pub const SINGLE_INT: core::ffi::c_int = 42 as core::ffi::c_int;
+pub const INT_ARRAY: [core::ffi::c_int; 2] = [42 as core::ffi::c_int, 9001 as core::ffi::c_int];
+pub const CHAR_ARRAY: [core::ffi::c_char; 6] =
+    unsafe { ::core::mem::transmute::<[u8; 6], [core::ffi::c_char; 6]>(*b"hello\0") };
+#[no_mangle]
+pub unsafe extern "C" fn local_compound_literals() {
+    let mut single_int: core::ffi::c_int = 42 as core::ffi::c_int;
+    let mut single_int_ptr: *mut core::ffi::c_int =
+        &mut (42 as core::ffi::c_int) as *mut core::ffi::c_int;
+    let mut int_array_ptr: *mut core::ffi::c_int =
+        [42 as core::ffi::c_int, 9001 as core::ffi::c_int].as_mut_ptr();
+    let mut char_array_ptr: *mut core::ffi::c_char =
+        (::core::mem::transmute::<[u8; 6], [core::ffi::c_char; 6]>(*b"hello\0")).as_mut_ptr();
+    let mut macro_single_int: core::ffi::c_int = SINGLE_INT;
+    let mut macro_single_int_ptr: *mut core::ffi::c_int = &mut SINGLE_INT as *mut core::ffi::c_int;
+    let mut macro_int_array_ptr: *mut core::ffi::c_int = INT_ARRAY.as_mut_ptr();
+    let mut macro_char_array_ptr: *mut core::ffi::c_char = CHAR_ARRAY.as_mut_ptr();
+}