SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "foo"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        EXPR_STMT
          IF_EXPR
            IF_KW "if"
            WHITESPACE " "
            LITERAL
              TRUE_KW "true"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          IF_EXPR
            IF_KW "if"
            WHITESPACE " "
            LITERAL
              TRUE_KW "true"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
            WHITESPACE " "
            ELSE_KW "else"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          IF_EXPR
            IF_KW "if"
            WHITESPACE " "
            LITERAL
              TRUE_KW "true"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
            WHITESPACE " "
            ELSE_KW "else"
            WHITESPACE " "
            IF_EXPR
              IF_KW "if"
              WHITESPACE " "
              LITERAL
                FALSE_KW "false"
              WHITESPACE " "
              BLOCK_EXPR
                STMT_LIST
                  L_CURLY "{"
                  R_CURLY "}"
              WHITESPACE " "
              ELSE_KW "else"
              WHITESPACE " "
              BLOCK_EXPR
                STMT_LIST
                  L_CURLY "{"
                  R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          IF_EXPR
            IF_KW "if"
            WHITESPACE " "
            PATH_EXPR
              PATH
                PATH_SEGMENT
                  NAME_REF
                    IDENT "S"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          IF_EXPR
            IF_KW "if"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                WHITESPACE " "
                LITERAL
                  TRUE_KW "true"
                WHITESPACE " "
                R_CURLY "}"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                WHITESPACE " "
                R_CURLY "}"
            WHITESPACE " "
            ELSE_KW "else"
            WHITESPACE " "
            BLOCK_EXPR
              STMT_LIST
                L_CURLY "{"
                WHITESPACE " "
                R_CURLY "}"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"