fix: Add support for builtin char8_t type

Author: Swatinem

src/ast.rs

@@ -4011,6 +4011,7 @@ define_vocabulary! {
     ///                ::= Dh # IEEE 754r half-precision floating point (16 bits)
     ///                ::= Di # char32_t
     ///                ::= Ds # char16_t
+    ///                ::= Du # char8_t
     ///                ::= Da # auto
     ///                ::= Dc # decltype(auto)
     ///                ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
@@ -4044,6 +4045,7 @@ define_vocabulary! {
         DecimalFloat16   (b"Dh", "half"),
         Char32           (b"Di", "char32_t"),
         Char16           (b"Ds", "char16_t"),
+        Char8            (b"Du", "char8_t"),
         Auto             (b"Da", "auto"),
         Decltype         (b"Dc", "decltype(auto)"),
         Nullptr          (b"Dn", "std::nullptr_t")

tests/tests.rs

@@ -573,3 +573,7 @@ demangles!(
     "___ZN6WebKit23ApplicationStateTrackerC2EP6UIViewP13objc_selectorS4_S4__block_invoke.19",
     "invocation function for block in WebKit::ApplicationStateTracker::ApplicationStateTracker(UIView*, objc_selector*, objc_selector*, objc_selector*)"
 );
+demangles!(
+    _ZNKSt6__ndk112basic_stringIDuNS_11char_traitsIDuEENS_9allocatorIDuEEE5c_strEv,
+    "std::__ndk1::basic_string<char8_t, std::__ndk1::char_traits<char8_t>, std::__ndk1::allocator<char8_t> >::c_str() const"
+);