Constant C 

pub const C: &str = r#"
    (function_definition
      declarator: (function_declarator
        declarator: (identifier) @name)) @function

    (declaration
      declarator: (function_declarator
        declarator: (identifier) @name)) @function

    (struct_specifier
      name: (type_identifier) @name) @struct

    (enum_specifier
      name: (type_identifier) @name) @enum

    (type_definition
      declarator: (type_identifier) @name) @type
"#;

C symbol extraction query