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-rw-r--r--src/codegen/derive_debug.rs10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/codegen/derive_debug.rs b/src/codegen/derive_debug.rs
index 066af339..82456797 100644
--- a/src/codegen/derive_debug.rs
+++ b/src/codegen/derive_debug.rs
@@ -53,7 +53,7 @@ pub fn gen_debug_impl(
impl X {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
write!(f, $format_string $tokens)
- }
+ }
});
match impl_.unwrap().node {
@@ -127,6 +127,12 @@ impl<'a> ImplDebug<'a> for Item {
) -> Option<(String, Vec<TokenTree>)> {
let name_ident = ctx.rust_ident_raw(name);
+ // We don't know if blacklisted items `impl Debug` or not, so we can't
+ // add them to the format string we're building up.
+ if !ctx.whitelisted_items().contains(&self.id()) {
+ return None;
+ }
+
let ty = match self.as_type() {
Some(ty) => ty,
None => {
@@ -168,7 +174,7 @@ impl<'a> ImplDebug<'a> for Item {
} else {
debug_print(ctx, name, name_ident)
}
- }
+ }
// The generic is not required to implement Debug, so we can not debug print that type
TypeKind::TypeParam => {