feat: impl FromStr for naga::wgsl::error::Severity

naga/src/diagnostic_filter.rs

@@ -11,6 +11,7 @@ use indexmap::IndexMap;
 use serde::Deserialize;
 #[cfg(feature = "serialize")]
 use serde::Serialize;
+use std::str::FromStr;
 
 /// A severity set on a [`DiagnosticFilter`].
 ///
@@ -67,6 +68,14 @@ impl Severity {
     }
 }
 
+impl FromStr for Severity {
+    type Err = ();
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Self::from_ident(s).ok_or(())
+    }
+}
+
 /// A filterable triggering rule in a [`DiagnosticFilter`].
 ///
 /// <https://www.w3.org/TR/WGSL/#filterable-triggering-rules>

naga/src/front/wgsl/parse/mod.rs

@@ -2649,11 +2649,12 @@ impl Parser {
         lexer.expect(Token::Paren('('))?;
 
         let (severity_control_name, severity_control_name_span) = lexer.next_ident_with_span()?;
-        let new_severity = diagnostic_filter::Severity::from_ident(severity_control_name).ok_or(
-            Error::DiagnosticInvalidSeverity {
-                severity_control_name_span,
-            },
-        )?;
+        let new_severity =
+            severity_control_name
+                .parse()
+                .map_err(|()| Error::DiagnosticInvalidSeverity {
+                    severity_control_name_span,
+                })?;
 
         lexer.expect(Token::Separator(','))?;