SOURCE_FILE
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    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "a"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        R_CURLY "}"
  WHITESPACE "\n"
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "b"
    PARAM_LIST
      L_PAREN "("
      PARAM
        IDENT_PAT
          NAME
            IDENT "x"
        COLON ":"
        WHITESPACE " "
        PATH_TYPE
          PATH
            PATH_SEGMENT
              NAME_REF
                IDENT "i32"
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        R_CURLY "}"
  WHITESPACE "\n"
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "c"
    PARAM_LIST
      L_PAREN "("
      PARAM
        IDENT_PAT
          NAME
            IDENT "x"
        COLON ":"
        WHITESPACE " "
        PATH_TYPE
          PATH
            PATH_SEGMENT
              NAME_REF
                IDENT "i32"
      COMMA ","
      WHITESPACE " "
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        R_CURLY "}"
  WHITESPACE "\n"
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "d"
    PARAM_LIST
      L_PAREN "("
      PARAM
        IDENT_PAT
          NAME
            IDENT "x"
        COLON ":"
        WHITESPACE " "
        PATH_TYPE
          PATH
            PATH_SEGMENT
              NAME_REF
                IDENT "i32"
      COMMA ","
      WHITESPACE " "
      PARAM
        IDENT_PAT
          NAME
            IDENT "y"
        COLON ":"
        WHITESPACE " "
        TUPLE_TYPE
          L_PAREN "("
          R_PAREN ")"
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        R_CURLY "}"
  WHITESPACE "\n"
