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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/rust/serde_derive/src/dummy.rs
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/serde_derive/src/dummy.rs')
-rw-r--r--third_party/rust/serde_derive/src/dummy.rs48
1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/rust/serde_derive/src/dummy.rs b/third_party/rust/serde_derive/src/dummy.rs
new file mode 100644
index 0000000000..a02bd37626
--- /dev/null
+++ b/third_party/rust/serde_derive/src/dummy.rs
@@ -0,0 +1,48 @@
+use proc_macro2::{Ident, TokenStream};
+use quote::format_ident;
+
+use syn;
+use try;
+
+pub fn wrap_in_const(
+ serde_path: Option<&syn::Path>,
+ trait_: &str,
+ ty: &Ident,
+ code: TokenStream,
+) -> TokenStream {
+ let try_replacement = try::replacement();
+
+ let dummy_const = if cfg!(no_underscore_consts) {
+ format_ident!("_IMPL_{}_FOR_{}", trait_, unraw(ty))
+ } else {
+ format_ident!("_")
+ };
+
+ let use_serde = match serde_path {
+ Some(path) => quote! {
+ use #path as _serde;
+ },
+ None => quote! {
+ #[allow(unused_extern_crates, clippy::useless_attribute)]
+ extern crate serde as _serde;
+ },
+ };
+
+ quote! {
+ #[doc(hidden)]
+ #[allow(non_upper_case_globals, unused_attributes, unused_qualifications)]
+ const #dummy_const: () = {
+ #use_serde
+ #try_replacement
+ #code
+ };
+ }
+}
+
+#[allow(deprecated)]
+fn unraw(ident: &Ident) -> String {
+ // str::trim_start_matches was added in 1.30, trim_left_matches deprecated
+ // in 1.33. We currently support rustc back to 1.15 so we need to continue
+ // to use the deprecated one.
+ ident.to_string().trim_left_matches("r#").to_owned()
+}