Support C-string literal syntax

Cargo.toml

@@ -18,14 +18,14 @@ rust-version = "1.60"
 verbatim = ["syn/parsing"]
 
 [dependencies]
-proc-macro2 = { version = "1.0.74", default-features = false }
-syn = { version = "2.0.46", default-features = false, features = ["full"] }
+proc-macro2 = { version = "1.0.80", default-features = false }
+syn = { version = "2.0.59", default-features = false, features = ["full"] }
 
 [dev-dependencies]
 indoc = "2"
-proc-macro2 = { version = "1.0.74", default-features = false }
+proc-macro2 = { version = "1.0.80", default-features = false }
 quote = { version = "1.0.35", default-features = false }
-syn = { version = "2.0.46", default-features = false, features = ["parsing"] }
+syn = { version = "2.0.59", default-features = false, features = ["parsing"] }
 
 [lib]
 doc-scrape-examples = false

src/lit.rs

@@ -1,13 +1,14 @@
 use crate::algorithm::Printer;
 use proc_macro2::Literal;
-use syn::{Lit, LitBool, LitByte, LitByteStr, LitChar, LitFloat, LitInt, LitStr};
+use syn::{Lit, LitBool, LitByte, LitByteStr, LitCStr, LitChar, LitFloat, LitInt, LitStr};
 
 impl Printer {
     pub fn lit(&mut self, lit: &Lit) {
         match lit {
             #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
             Lit::Str(lit) => self.lit_str(lit),
             Lit::ByteStr(lit) => self.lit_byte_str(lit),
+            Lit::CStr(lit) => self.lit_c_str(lit),
             Lit::Byte(lit) => self.lit_byte(lit),
             Lit::Char(lit) => self.lit_char(lit),
             Lit::Int(lit) => self.lit_int(lit),
@@ -26,6 +27,10 @@ impl Printer {
         self.word(lit.token().to_string());
     }
 
+    fn lit_c_str(&mut self, lit: &LitCStr) {
+        self.word(lit.token().to_string());
+    }
+
     fn lit_byte(&mut self, lit: &LitByte) {
         self.word(lit.token().to_string());
     }