From 2e397413a1a5fff5eb3660c9a09f9e91cf480814 Mon Sep 17 00:00:00 2001
From: Levi Morrison <levi.morrison@datadoghq.com>
Date: Wed, 30 Mar 2022 09:15:09 -0600
Subject: [PATCH] Add #[must_use] to some FFI functions

---
 ddprof-ffi/src/exporter.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ddprof-ffi/src/exporter.rs b/ddprof-ffi/src/exporter.rs
index e4ec85f..634666a 100644
--- a/ddprof-ffi/src/exporter.rs
+++ b/ddprof-ffi/src/exporter.rs
@@ -155,6 +155,7 @@ fn try_to_endpoint(
     }
 }
 
+#[must_use]
 #[export_name = "ddprof_ffi_ProfileExporterV3_new"]
 pub extern "C" fn profile_exporter_new(
     family: CharSlice,
@@ -231,6 +232,7 @@ pub unsafe extern "C" fn profile_exporter_build(
 /// # Safety
 /// If the `exporter` and `request` are non-null, then they need to have been
 /// created by apis in this module.
+#[must_use]
 #[export_name = "ddprof_ffi_ProfileExporterV3_send"]
 pub unsafe extern "C" fn profile_exporter_send(
     exporter: Option<NonNull<ProfileExporterV3>>,
@@ -267,6 +269,7 @@ pub unsafe extern "C" fn send_result_drop(result: SendResult) {
     std::mem::drop(result)
 }
 
+#[must_use]
 #[export_name = "ddprof_ffi_Vec_tag_new"]
 pub extern "C" fn vec_tag_new<'a>() -> crate::Vec<Tag<'a>> {
     crate::Vec::default()
@@ -367,6 +370,7 @@ pub extern "C" fn vec_tag_result_drop(result: VecTagResult) {
     std::mem::drop(result)
 }
 
+#[must_use]
 #[export_name = "ddprof_ffi_Vec_tag_parse"]
 pub extern "C" fn vec_tag_parse(string: CharSlice) -> VecTagResult {
     match string.try_into() {