fix(forge bind): prefix keyword mod names with r#

crates/forge/tests/cli/cmd.rs

@@ -3519,3 +3519,34 @@ Ran 1 test suite [ELAPSED]: 1 tests passed, 0 failed, 0 skipped (1 total tests)
             .is_json(),
         );
 });
+
+// <https://github.com/foundry-rs/foundry/issues/5847>
+forgetest_init!(can_bind_enum_modules, |prj, cmd| {
+    prj.clear();
+
+    prj.add_source(
+        "Enum.sol",
+        r#"
+    contract Enum {
+        enum MyEnum { A, B, C }
+    }
+    "#,
+    )
+    .unwrap();
+
+    prj.add_source(
+        "UseEnum.sol",
+        r#"
+    import "./Enum.sol";
+    contract UseEnum {
+        Enum.MyEnum public myEnum;
+    }"#,
+    )
+    .unwrap();
+
+    cmd.arg("bind").assert_success().stdout_eq(str![[r#"[COMPILING_FILES] with [SOLC_VERSION]
+[SOLC_VERSION] [ELAPSED]
+Compiler run successful!
+Generating bindings for 11 contracts
+Bindings have been generated to [..]"#]]);
+});

crates/sol-macro-gen/src/sol_macro_gen.rs

@@ -165,7 +165,7 @@ edition = "2021"
                 write!(&mut lib_contents, "{contents}")?;
             } else {
                 fs::write(path, contents).wrap_err("failed to write to file")?;
-                writeln!(&mut lib_contents, "pub mod {name};")?;
+                write_mod_name(&mut lib_contents, &name)?;
             }
         }
 
@@ -194,12 +194,7 @@ edition = "2021"
             let name = instance.name.to_lowercase();
             if !single_file {
                 // Module
-                write!(
-                    mod_contents,
-                    r#"pub mod {};
-                "#,
-                    instance.name.to_lowercase()
-                )?;
+                write_mod_name(&mut mod_contents, &name)?;
                 let mut contents = String::new();
 
                 write!(contents, "{}", instance.expansion.as_ref().unwrap())?;
@@ -270,12 +265,7 @@ edition = "2021"
                     .to_string();
 
                 self.check_file_contents(&path, &tokens)?;
-
-                write!(
-                    &mut super_contents,
-                    r#"pub mod {name};
-                    "#
-                )?;
+                write_mod_name(&mut super_contents, &name)?;
             }
 
             let super_path =
@@ -344,3 +334,14 @@ edition = "2021"
         Ok(())
     }
 }
+
+fn write_mod_name(contents: &mut String, name: &str) -> Result<()> {
+    if syn::parse_str::<syn::File>(&format!("pub mod {name};"))
+        .is_err_and(|e| e.to_string().contains("expected identifier, found keyword"))
+    {
+        write!(contents, "pub mod r#{name};")?;
+    } else {
+        write!(contents, "pub mod {name};")?;
+    }
+    Ok(())
+}