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Call ..................................................................... Concurrency .............................................................. Guard .................................................................... To be processed: .......................................................... Annex B ................................................................. Method of definition ......................................................... Definitions ............................................................... Conformance ............................................................. Notation ................................................................. Notation for completion response and conditions ................................................................ Source programs and character sets ........................................... Notation ................................................................. Lexical level .............................................................. Syntax level .............................................................. Data Model ................................................................ Evaluation (Definitions written as code) ........................................ Annex C ................................................................. Bibliography .............................................................. 176 176 176 176 181 181 181 181 181 181 181 181 181 181 181 182 186 186
Foreword Purpose This standard provides an unambiguous definition of the programming language Rexx. Its purpose is to facilitate portability of Rexx programs for use on a wide variety of computer systems. History The computer programming language Rexx was designed by Mike Cowlishaw to satisfy the following principal aims: - to provide a highly readable command programming language for the benefit of programmers and program readers, users and maintainers; - to incorporate within this language program design features such as natural data typing and control structures which would contribute to rapid, efficient and accurate program development; - to define a language whose implementations could be both reliable and efficient on a wide variety of computing platforms. In November, 1990, X3 announced the formation of a new technical committee, X3J18, to develop an American National Standard for Rexx. This standard was published as ANSI X3.274-1996. The popularity of "Object Oriented" programming, and the need for Rexx to work with objects created in various ways, led to Rexx extensions and to a second X3J18 project which produced this standard. (Ed - hopefully) Committee lists (Here) This standard was prepared by the Technical Development Committee for Rexx, X3J18. There are annexes in this standard; they are informative and are not considered part of this standard. Suggestions for improvement of this standard will be welcome. They should be sent to the Information Technology Industry Council, 1250 Eye Street, NW, Washington DC 20005-3922. This standard was processed and approved for submittal to ANSI by the Accredited Standards Committee on Information Processing Systems, NCITS. Committee approval of this standard does not necessarily imply that all committee members voted for its approval. At the time it approved this standard, the NCITS Committee had the following members: To be inserted The people who contributed to Technical Committee J18 on Rexx, which developed this standard, include:
Page 1 and 2: Programming Language Extended Rexx
Page 3 and 4: Foreword ..........................
Page 5 and 6: 5.14.2 API_Value ..................
Page 7 and 8: 9.5.9 EXIT ........................
Page 9 and 10: 10.4.3 BITOR ......................
Page 11: 12.2.7.2 ITEMS ....................
Page 15 and 16: 3.1.14 default output stream: An ou
Page 17 and 18: 17 - Symbol length shall be support
Page 19 and 20: API_Start(How, Source, Environment,
Page 21 and 22: If this function is unable to suppl
Page 23 and 24: Set #Outcome to be a reference to a
Page 25 and 26: Text of Config_ExternalMethod waiti
Page 27 and 28: - when the configuration is unable
Page 29 and 30: Option is 'N' or 'C'. Semantics: If
Page 31 and 32: Write String as a line to the desti
Page 33 and 34: How does this fit with variables as
Page 35 and 36: Returns both the name and the value
Page 37 and 38: - EXPONENT_SIGN occurs when the cha
Page 39 and 40: x3j18:=program Eos | Msg35.1 progra
Page 41 and 42: arg := 'ARG' [template list] call :
Page 43 and 44: method name:=(taken constant | Msg1
Page 45 and 46: If a message_term contains a '[' it
Page 47 and 48: variable pool referenced by #Upper
Page 49 and 50: See nnn for the value of the third
Page 51 and 52: If the and_expression is a comparis
Page 53 and 54: * Adjust the exponent so that decim
Page 55 and 56: Align1 = 0 Align2 = Exponent1 - Exp
Page 57 and 58: zero can happen. */ /* x||y is the
Page 59 and 60: If there is such a matching label,
Page 61 and 62: The argument Streams is the value o
Page 63 and 64:
This notation is used in the descri
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'matching THEN clause; found ""' #E
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#ErrorText.33 = 'Invalid expression
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'routine "" was called as a functio
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For each routine in order of appear
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call #Raise 'HALT', substr(#Respons
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call AddressSetup /* Note what is s
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9.5.5 Command to the configuration
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#Loop = #Loop+1 #Iterate.#Loop = #C
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The opportunity is provided for a f
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if \datatype(Value,'W') then call #
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end /* while */ if Template.Tok \==
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The PROCEDURE instruction is used w
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If \#Contains(select_body, 'OTHERWI
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Error number 3 is available to repo
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10 Built-in functions 10.1 Notation
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end when Type == 'HEX' then /* Hexa
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when InOption == 'C' then do parse
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Leap: procedure /* Return 1 if the
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call CheckArgs 'rANY rANY' Output =
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*DATATYPE tests for exponent out of
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* No return to here */ 10.1.15 OVER
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* Here if argument was not a charac
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if Start = 0 then return 0 /* Start
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end end /* ShowExp now indicates wh
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select when Number < 0 then Output
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Value=#Bif_Arg.1 #Interactive.#Leve
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* 2s-complement for negatives. */ i
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Mode = #Outcome r = '' do until Cou
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#StreamState.Stream = '' if \#Bif_A
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Value = #Bif_Arg.2 if #Bif_ArgExist
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Maximum = #Bif_Arg.1 if Maximum>100
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Subject = #Bif_Arg.1 if #Bif_ArgExi
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call Raise 40.29, Option InValue =
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11 Built-in classes 11.1 Notation T
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Causes the receiver class to inheri
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::method D2C ::method X2B ::method
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12 Provided classes (Informative) 1
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12.2.2.1 INIT ::method init expose
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* Returns a supplier object for the
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12.2.4 Class queue ::class 'Queue'
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eturn CommonUnion(self,EnBag(arg(1)
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cs=self~supplier do while cs~availa
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if j=0 then return .nil /* Run the
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if arg(2,'E') then t=arg(2)[1] self
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END jstart = 1 output = 1 END /* pr
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eturn self ::method exposed private
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[r~dimension(1)+1]=a[j+1] end j ret
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a=self~exposed /* Returns the index
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end j return r ::class 'Table' subc
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if arg(1)==a[j+1] then n=n+1 end j
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if arg(1)==a[j+1] then r[r~dimensio
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do j=4 by 3 to 1+3*a[1]/*ItemsCount
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if arg(2,'E') then t=arg(2)[1] self
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end return TmpColl End commented aw
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::method makearray /* rCHARLINE */
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Annex A (informative) Rationale Thi
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A model is needed for whether chang
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Function Interface, System Exit Int
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non-strings, which can behave in a
Page 183 and 184:
#Tracing. is the trace setting lett
Page 185 and 186:
Annex C (informative) Bibliography
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