Rollup merge of #103656 - camsteffen:symbol-to-string, r=compiler-errors

matthiaskrgr · web-flow · commit f41b1bfd0f23 · 2022-10-29T08:57:36.000+02:00
Specialize ToString for Symbol
diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
@@ -1901,6 +1901,13 @@ impl fmt::Display for Symbol {
     }
 }
 
+// takes advantage of `str::to_string` specialization
+impl ToString for Symbol {
+    fn to_string(&self) -> String {
+        self.as_str().to_string()
+    }
+}
+
 impl<S: Encoder> Encodable<S> for Symbol {
     default fn encode(&self, s: &mut S) {
         s.emit_str(self.as_str());

Original file line number	Diff line number	Diff line change
`@@ -1901,6 +1901,13 @@ impl fmt::Display for Symbol {`
`1901`	`1901`	`}`
`1902`	`1902`	`}`
`1903`	`1903`
	`1904`	+// takes advantage of `str::to_string` specialization
	`1905`	`+impl ToString for Symbol {`
	`1906`	`+ fn to_string(&self) -> String {`
	`1907`	`+ self.as_str().to_string()`
	`1908`	`+ }`
	`1909`	`+}`
	`1910`	`+`
`1904`	`1911`	`impl<S: Encoder> Encodable<S> for Symbol {`
`1905`	`1912`	`default fn encode(&self, s: &mut S) {`
`1906`	`1913`	`s.emit_str(self.as_str());`