SOURCE_FILE
  TYPE_ALIAS
    TYPE_KW "type"
    WHITESPACE " "
    NAME
      IDENT "Foo"
    GENERIC_PARAM_LIST
      L_ANGLE "<"
      LIFETIME_PARAM
        LIFETIME
          LIFETIME_IDENT "'a"
      R_ANGLE ">"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    REF_TYPE
      AMP "&"
      LIFETIME
        LIFETIME_IDENT "'a"
      WHITESPACE " "
      PAREN_TYPE
        L_PAREN "("
        DYN_TRAIT_TYPE
          DYN_KW "dyn"
          WHITESPACE " "
          TYPE_BOUND_LIST
            TYPE_BOUND
              PATH_TYPE
                PATH
                  PATH_SEGMENT
                    NAME_REF
                      IDENT "Send"
            WHITESPACE " "
            PLUS "+"
            WHITESPACE " "
            TYPE_BOUND
              PATH_TYPE
                PATH
                  PATH_SEGMENT
                    NAME_REF
                      IDENT "Sync"
        R_PAREN ")"
    SEMICOLON ";"
  WHITESPACE "\n"
  TYPE_ALIAS
    TYPE_KW "type"
    WHITESPACE " "
    NAME
      IDENT "Foo"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    PTR_TYPE
      STAR "*"
      CONST_KW "const"
      WHITESPACE " "
      PAREN_TYPE
        L_PAREN "("
        DYN_TRAIT_TYPE
          DYN_KW "dyn"
          WHITESPACE " "
          TYPE_BOUND_LIST
            TYPE_BOUND
              PATH_TYPE
                PATH
                  PATH_SEGMENT
                    NAME_REF
                      IDENT "Send"
            WHITESPACE " "
            PLUS "+"
            WHITESPACE " "
            TYPE_BOUND
              PATH_TYPE
                PATH
                  PATH_SEGMENT
                    NAME_REF
                      IDENT "Sync"
        R_PAREN ")"
    SEMICOLON ";"
  WHITESPACE "\n"
  TYPE_ALIAS
    TYPE_KW "type"
    WHITESPACE " "
    NAME
      IDENT "Foo"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    FN_PTR_TYPE
      FN_KW "fn"
      PARAM_LIST
        L_PAREN "("
        R_PAREN ")"
      WHITESPACE " "
      RET_TYPE
        THIN_ARROW "->"
        WHITESPACE " "
        PAREN_TYPE
          L_PAREN "("
          DYN_TRAIT_TYPE
            DYN_KW "dyn"
            WHITESPACE " "
            TYPE_BOUND_LIST
              TYPE_BOUND
                PATH_TYPE
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "Send"
              WHITESPACE " "
              PLUS "+"
              WHITESPACE " "
              TYPE_BOUND
                LIFETIME
                  LIFETIME_IDENT "'static"
          R_PAREN ")"
    SEMICOLON ";"
  WHITESPACE "\n"
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "main"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        LET_STMT
          LET_KW "let"
          WHITESPACE " "
          IDENT_PAT
            NAME
              IDENT "b"
          WHITESPACE " "
          EQ "="
          WHITESPACE " "
          CAST_EXPR
            PAREN_EXPR
              L_PAREN "("
              REF_EXPR
                AMP "&"
                PATH_EXPR
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "a"
              R_PAREN ")"
            WHITESPACE " "
            AS_KW "as"
            WHITESPACE " "
            REF_TYPE
              AMP "&"
              PAREN_TYPE
                L_PAREN "("
                DYN_TRAIT_TYPE
                  DYN_KW "dyn"
                  WHITESPACE " "
                  TYPE_BOUND_LIST
                    TYPE_BOUND
                      PATH_TYPE
                        PATH
                          PATH_SEGMENT
                            NAME_REF
                              IDENT "Add"
                            GENERIC_ARG_LIST
                              L_ANGLE "<"
                              TYPE_ARG
                                PATH_TYPE
                                  PATH
                                    PATH_SEGMENT
                                      NAME_REF
                                        IDENT "Other"
                              COMMA ","
                              WHITESPACE " "
                              ASSOC_TYPE_ARG
                                NAME_REF
                                  IDENT "Output"
                                WHITESPACE " "
                                EQ "="
                                WHITESPACE " "
                                PATH_TYPE
                                  PATH
                                    PATH_SEGMENT
                                      NAME_REF
                                        IDENT "Addable"
                              R_ANGLE ">"
                    WHITESPACE " "
                    PLUS "+"
                    WHITESPACE " "
                    TYPE_BOUND
                      PATH_TYPE
                        PATH
                          PATH_SEGMENT
                            NAME_REF
                              IDENT "Other"
                R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"