@ ProgramNode (location: (1,0)-(1,7))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,7))
    └── body: (length: 1)
        └── @ RegularExpressionNode (location: (1,0)-(1,7))
            ├── flags: forced_us_ascii_encoding
            ├── opening_loc: (1,0)-(1,1) = "/"
            ├── content_loc: (1,1)-(1,6) = "\\cC\\d"
            ├── closing_loc: (1,6)-(1,7) = "/"
            └── unescaped: "\\x03\\d"