Add test for const generics demangling

Author: varkor

src/test/ui/symbol-names/const-generics-demangling.rs

@@ -0,0 +1,38 @@
+// build-fail
+// compile-flags: -Z symbol-mangling-version=v0
+
+#![feature(min_const_generics, rustc_attrs)]
+
+pub struct Unsigned<const F: u8>;
+
+#[rustc_symbol_name]
+//~^ ERROR symbol-name(_RMCs4fqI2P2rA04_25const_generics_demanglingINtB0_8UnsignedKhb_E)
+//~| ERROR demangling(<const_generics_demangling[317d481089b8c8fe]::Unsigned<11: u8>>)
+//~| ERROR demangling-alt(<const_generics_demangling::Unsigned<11>>)
+impl Unsigned<11> {}
+
+pub struct Signed<const F: i16>;
+
+#[rustc_symbol_name]
+//~^ ERROR symbol-name(_RMs_Cs4fqI2P2rA04_25const_generics_demanglingINtB2_6SignedKsn98_E)
+//~| ERROR demangling(<const_generics_demangling[317d481089b8c8fe]::Signed<-152: i16>>)
+//~| ERROR demangling-alt(<const_generics_demangling::Signed<-152>>)
+impl Signed<-152> {}
+
+pub struct Bool<const F: bool>;
+
+#[rustc_symbol_name]
+//~^ ERROR symbol-name(_RMs0_Cs4fqI2P2rA04_25const_generics_demanglingINtB3_4BoolKb1_E)
+//~| ERROR demangling(<const_generics_demangling[317d481089b8c8fe]::Bool<true: bool>>)
+//~| ERROR demangling-alt(<const_generics_demangling::Bool<true>>)
+impl Bool<true> {}
+
+pub struct Char<const F: char>;
+
+#[rustc_symbol_name]
+//~^ ERROR symbol-name(_RMs1_Cs4fqI2P2rA04_25const_generics_demanglingINtB3_4CharKc2202_E)
+//~| ERROR demangling(<const_generics_demangling[317d481089b8c8fe]::Char<'∂': char>>)
+//~| ERROR demangling-alt(<const_generics_demangling::Char<'∂'>>)
+impl Char<'∂'> {}
+
+fn main() {}

src/test/ui/symbol-names/const-generics-demangling.stderr

@@ -0,0 +1,74 @@
+error: symbol-name(_RMCs4fqI2P2rA04_25const_generics_demanglingINtB0_8UnsignedKhb_E)
+  --> $DIR/const-generics-demangling.rs:8:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(<const_generics_demangling[317d481089b8c8fe]::Unsigned<11: u8>>)
+  --> $DIR/const-generics-demangling.rs:8:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(<const_generics_demangling::Unsigned<11>>)
+  --> $DIR/const-generics-demangling.rs:8:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_RMs_Cs4fqI2P2rA04_25const_generics_demanglingINtB2_6SignedKsn98_E)
+  --> $DIR/const-generics-demangling.rs:16:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(<const_generics_demangling[317d481089b8c8fe]::Signed<-152: i16>>)
+  --> $DIR/const-generics-demangling.rs:16:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(<const_generics_demangling::Signed<-152>>)
+  --> $DIR/const-generics-demangling.rs:16:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_RMs0_Cs4fqI2P2rA04_25const_generics_demanglingINtB3_4BoolKb1_E)
+  --> $DIR/const-generics-demangling.rs:24:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(<const_generics_demangling[317d481089b8c8fe]::Bool<true: bool>>)
+  --> $DIR/const-generics-demangling.rs:24:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(<const_generics_demangling::Bool<true>>)
+  --> $DIR/const-generics-demangling.rs:24:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: symbol-name(_RMs1_Cs4fqI2P2rA04_25const_generics_demanglingINtB3_4CharKc2202_E)
+  --> $DIR/const-generics-demangling.rs:32:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling(<const_generics_demangling[317d481089b8c8fe]::Char<'∂': char>>)
+  --> $DIR/const-generics-demangling.rs:32:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: demangling-alt(<const_generics_demangling::Char<'∂'>>)
+  --> $DIR/const-generics-demangling.rs:32:1
+   |
+LL | #[rustc_symbol_name]
+   | ^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 12 previous errors
+