Squashed 'third_party/rules_rust/' content from commit bf59038ca
git-subtree-dir: third_party/rules_rust
git-subtree-split: bf59038cac11798cbaef9f3bf965bad8182b97fa
Signed-off-by: Brian Silverman <bsilver16384@gmail.com>
Change-Id: I5a20e403203d670df467ea97dde9a4ac40339a8d
diff --git a/examples/ffi/c_calling_rust/BUILD.bazel b/examples/ffi/c_calling_rust/BUILD.bazel
new file mode 100644
index 0000000..b491126
--- /dev/null
+++ b/examples/ffi/c_calling_rust/BUILD.bazel
@@ -0,0 +1,18 @@
+load("@rules_cc//cc:defs.bzl", "cc_test")
+load("@rules_rust//rust:defs.bzl", "rust_static_library", "rust_test")
+
+rust_static_library(
+ name = "rusty",
+ srcs = ["lib.rs"],
+)
+
+rust_test(
+ name = "rusty_test",
+ crate = ":rusty",
+)
+
+cc_test(
+ name = "main",
+ srcs = ["main.c"],
+ deps = [":rusty"],
+)
diff --git a/examples/ffi/c_calling_rust/lib.rs b/examples/ffi/c_calling_rust/lib.rs
new file mode 100644
index 0000000..2d6fc52
--- /dev/null
+++ b/examples/ffi/c_calling_rust/lib.rs
@@ -0,0 +1,14 @@
+#[no_mangle]
+pub extern "C" fn my_favorite_number() -> i32 {
+ 4
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ #[test]
+ fn test_my_favorite_number() {
+ assert_eq!(4, my_favorite_number());
+ }
+}
diff --git a/examples/ffi/c_calling_rust/main.c b/examples/ffi/c_calling_rust/main.c
new file mode 100644
index 0000000..2a57330
--- /dev/null
+++ b/examples/ffi/c_calling_rust/main.c
@@ -0,0 +1,9 @@
+#include <assert.h>
+#include <stdint.h>
+
+extern int32_t my_favorite_number();
+
+int main(int argc, char** argv) {
+ assert(my_favorite_number() == 4);
+ return 0;
+}