fix: Fix builtin includes rejecting raw string literals

crates/hir-def/src/macro_expansion_tests/builtin_fn_macro.rs

@@ -439,7 +439,7 @@ macro_rules! include_bytes {
     ($file:expr,) => {{ /* compiler built-in */ }};
 }
 
-fn main() { include_bytes("foo"); }
+fn main() { include_bytes("foo");include_bytes(r"foo"); }
 "#,
         expect![[r##"
 #[rustc_builtin_macro]
@@ -448,7 +448,7 @@ macro_rules! include_bytes {
     ($file:expr,) => {{ /* compiler built-in */ }};
 }
 
-fn main() { include_bytes("foo"); }
+fn main() { include_bytes("foo");include_bytes(r"foo"); }
 "##]],
     );
 }

crates/hir-expand/src/builtin/fn_macro.rs

@@ -714,6 +714,12 @@ fn parse_string(tt: &tt::Subtree) -> Result<(Symbol, Span), ExpandError> {
                 kind: tt::LitKind::Str,
                 suffix: _,
             })) => Ok((unescape_str(text), *span)),
+            tt::TokenTree::Leaf(tt::Leaf::Literal(tt::Literal {
+                symbol: text,
+                span,
+                kind: tt::LitKind::StrRaw(_),
+                suffix: _,
+            })) => Ok((text.clone(), *span)),
             // FIXME: We wrap expression fragments in parentheses which can break this expectation
             // here
             // Remove this once we handle none delims correctly
@@ -725,6 +731,12 @@ fn parse_string(tt: &tt::Subtree) -> Result<(Symbol, Span), ExpandError> {
                         kind: tt::LitKind::Str,
                         suffix: _,
                     })) => Some((unescape_str(text), *span)),
+                    tt::TokenTree::Leaf(tt::Leaf::Literal(tt::Literal {
+                        symbol: text,
+                        span,
+                        kind: tt::LitKind::StrRaw(_),
+                        suffix: _,
+                    })) => Some((text.clone(), *span)),
                     _ => None,
                 })
             }