Simplify the StringFlags trait (#15944)

crates/ruff_python_ast/src/nodes.rs

@@ -1027,18 +1027,20 @@ pub trait StringFlags: Copy {
         self.quote_len()
     }
 
+    fn as_any_string_flags(self) -> AnyStringFlags {
+        AnyStringFlags::new(self.prefix(), self.quote_style(), self.triple_quotes())
+    }
+
     fn display_contents(self, contents: &str) -> DisplayFlags {
         DisplayFlags {
-            prefix: self.prefix(),
-            quote_str: self.quote_str(),
+            flags: self.as_any_string_flags(),
             contents,
         }
     }
 }
 
 pub struct DisplayFlags<'a> {
-    prefix: AnyStringPrefix,
-    quote_str: &'a str,
+    flags: AnyStringFlags,
     contents: &'a str,
 }
 
@@ -1047,8 +1049,8 @@ impl std::fmt::Display for DisplayFlags<'_> {
         write!(
             f,
             "{prefix}{quote}{contents}{quote}",
-            prefix = self.prefix,
-            quote = self.quote_str,
+            prefix = self.flags.prefix(),
+            quote = self.flags.quote_str(),
             contents = self.contents
         )
     }
@@ -2241,11 +2243,7 @@ impl From<AnyStringFlags> for StringLiteralFlags {
 
 impl From<StringLiteralFlags> for AnyStringFlags {
     fn from(value: StringLiteralFlags) -> Self {
-        Self::new(
-            AnyStringPrefix::Regular(value.prefix()),
-            value.quote_style(),
-            value.triple_quotes(),
-        )
+        value.as_any_string_flags()
     }
 }
 
@@ -2266,11 +2264,7 @@ impl From<AnyStringFlags> for BytesLiteralFlags {
 
 impl From<BytesLiteralFlags> for AnyStringFlags {
     fn from(value: BytesLiteralFlags) -> Self {
-        Self::new(
-            AnyStringPrefix::Bytes(value.prefix()),
-            value.quote_style(),
-            value.triple_quotes(),
-        )
+        value.as_any_string_flags()
     }
 }
 
@@ -2291,11 +2285,7 @@ impl From<AnyStringFlags> for FStringFlags {
 
 impl From<FStringFlags> for AnyStringFlags {
     fn from(value: FStringFlags) -> Self {
-        Self::new(
-            AnyStringPrefix::Format(value.prefix()),
-            value.quote_style(),
-            value.triple_quotes(),
-        )
+        value.as_any_string_flags()
     }
 }
 

crates/ruff_python_parser/src/parser/expression.rs

@@ -7,7 +7,7 @@ use rustc_hash::{FxBuildHasher, FxHashSet};
 use ruff_python_ast::name::Name;
 use ruff_python_ast::{
     self as ast, BoolOp, CmpOp, ConversionFlag, Expr, ExprContext, FStringElement, FStringElements,
-    IpyEscapeKind, Number, Operator, UnaryOp,
+    IpyEscapeKind, Number, Operator, StringFlags, UnaryOp,
 };
 use ruff_text_size::{Ranged, TextLen, TextRange, TextSize};
 

crates/ruff_python_parser/src/token.rs

@@ -14,7 +14,7 @@ use ruff_python_ast::str::{Quote, TripleQuotes};
 use ruff_python_ast::str_prefix::{
     AnyStringPrefix, ByteStringPrefix, FStringPrefix, StringLiteralPrefix,
 };
-use ruff_python_ast::{AnyStringFlags, BoolOp, Int, IpyEscapeKind, Operator, StringFlags, UnaryOp};
+use ruff_python_ast::{BoolOp, Int, IpyEscapeKind, Operator, StringFlags, UnaryOp};
 use ruff_text_size::{Ranged, TextRange};
 
 #[derive(Clone, Copy, PartialEq, Eq)]
@@ -770,11 +770,6 @@ impl TokenFlags {
     pub(crate) const fn is_raw_string(self) -> bool {
         self.intersects(TokenFlags::RAW_STRING)
     }
-
-    /// Converts this type to [`AnyStringFlags`], setting the equivalent flags.
-    pub(crate) fn as_any_string_flags(self) -> AnyStringFlags {
-        AnyStringFlags::new(self.prefix(), self.quote_style(), self.triple_quotes())
-    }
 }
 
 #[derive(Clone, Debug, Default)]