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EnTerr's avatar
EnTerr
Roku Guru
12 years ago

List of Reserved Words in BrS - where is it?

Reading the RTFM -
"3.1 Identifiers" wrote:
* may not use a "reserved word" as the name (see appendix for list of reserved words).

Where is said list of language reserved words? Seems as if it ended on the cutting room floor during the conversion to wiki - but i have vague memory of seeing that list somewhere in the days of yore.

As a bonus question, why EndFor and ExitFor are not reserved words whereas EndWhile, ExitWhile, EndIf, ElseIf, EndSub/EndFunction are?

ps. as commentary, there are a a few programming languages in which there are no reserved words (like PL/1 and Fortran, if i recollect), so something like this (it assigns to variable IF the bigger of two values THEN and ELSE) 
IF = IF THEN > ELSE THEN THEN ELSE ELSE FI
can be a valid statement and meaning is determined by context. But in most languages that is not the case, BASIC included (which bright script is dialect of).
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5 Replies

  • RokuJoel's avatar
    RokuJoel
    Binge Watcher
    12 years ago
    From the old Brightscript Reference 3.0 PDF, this seems to have been left out of the on-line version:

    Appendix C - Reserved Words
    END, LET, PRINT, IF, ELSE, ENDIF, THEN, GOTO, FOR, TO, STEP,
    NEXT, RETURN, DIM, NOT, AND, OR, TAB, STOP, OBJFUN, TYPE,
    TRUE, FALSE, CREATEOBJECT, WHILE, ENDWHILE, EXITWHILE, EACH, EXIT,
    INVALID, ENDFUNCTION, ENDSUB, ELSEIF, REM, LINE_NUM, SUB, FUNCTION


    From the BrightsSign Brightscript Manual 2.0

    58
    Reserved Words
    INVALID FOR POS
    AND PRINT LINE_NUM
    OR GOTO REM
    EACH IF RETURN
    NEXT NOT STEP
    DIM THEN STOP
    ELSE TO TAB
    END TAB OBJFUN
    TYPE RND TRUE
    FALSE CREATEOBJECT WHILE
    ENDWHILE EXITWHILE ENDSUB
    SUB FUNCTION EACH
    EXIT ENDFUNCTION ENDIF
  • EnTerr's avatar
    EnTerr
    Roku Guru
    12 years ago
    "RokuJoel" wrote:
    From the old Brightscript Reference 3.0 PDF, this seems to have been left out of the on-line version:

    Wow, thanks for instant response!
    Kindly requesting a current list to be included in the wiki?
  • EnTerr's avatar
    EnTerr
    Roku Guru
    12 years ago
    "RokuRobB" wrote:
    The BrightScript reserved word list is now on the Wiki in the BrightScript Language Reference, section 10. http://sdkdocs.roku.com/display/sdkdoc/ ... ervedWords

    Thanks for pointing out that this was missing.

    Thank you for fixing the omission. Couple of things to correct in that list:
    • NULL is not a reserved word (should be removed)

    • POS is a reserved word (should be added)


    [spoiler=sorted list of reserved words - AFAIK:k3yd2eks]
    AND
    CREATEOBJECT
    DIM
    EACH
    ELSE
    ELSEIF
    END
    ENDFUNCTION
    ENDIF
    ENDSUB
    ENDWHILE
    EXIT
    EXITWHILE
    FALSE
    FOR
    FUNCTION
    GOTO
    IF
    INVALID
    LET
    LINE_NUM
    NEXT
    NOT
    OBJFUN
    OR
    POS
    PRINT
    REM
    RETURN
    STEP
    STOP
    SUB
    TAB
    THEN
    TO
    TRUE
    TYPE
    WHILE
    [/spoiler:k3yd2eks]
  • EnTerr's avatar
    EnTerr
    Roku Guru
    12 years ago
    Good news, the list of BrS reserved words has been corrected (3rd time is a charm). In addition to the words i listed above, the following also turn out to be reserved words:
    • Box

    • Eval

    • GetGlobalAA

    • GetLastRunCompileError

    • GetLastRunRuntimeError

    • Run
    That is, in addition to statements, the names of all section 6.0: Runtime Functions are reserved words too (meaning cannot have variables named e.g. "box" or "run" or "type").

    Please pass along my gratitude to the person that ultimately was able to give a correct list of keywords.