IBM BSL LangSpecUpdMay69 free download

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Technical Newsletter Re: Form No. Z 28- 6642-0 This Newsletter No. Z28-2361 Date May 23, 1969 None Previous Newsletter Nos. BSL Language Specification This Technical Newsletter, a part of Release 17 of the BSL Compiler, provides replacement pages for BSL Language Specification. These replacement pages remain in effect for subs equent releas es unles s specifically altered. Pages to be replaced and/ or added are listed below. Remove Insert ----- 3-4 3-4 21-22 21-22 23-24 23-24 39 -4:0 39 - 40, 40. 1 43-4:4 43-44, 44. 1 65-66 65-66 67-68 67 -68 69-70 69-70 Changes and additions to the text and illustrations are indicated by a ve rtical line to the left of the change. Summary of Amendrrlents The attached amendn:1ents include information about three BSL language changes. The first aD:1endD:1ent describes and illustrates a new language feature, the GENERATE DATA statement, which enables the user to define data iteD:1s in asseD:1bler language which will be D:1apped with the cOD:1piler-generated constants and user-declared variables. The second aD:1endD:1ent discusses a change in the RESTRICT /RELEASE stateD:1ents which allows the user to specify a register variable name in addition to the actual register nUD:1ber. The third amendment con- tains inforD:1ation a bout the acceptance of GEND as a valid abbreviation of the language keyword GENERATED. Note: Please file this cover letter at the back of the publication to provide a quick reference to changes and a means of checking receipt of all aD:1endments. IBM Confidential CONTENTS INTRODUCTION 7 BASIC STRUCTURE 8 Syntactic Structure 8 Character Set 8 Identifiers 9 Blanks 9 Comments 9 Source Input 10 Program Structure 11 Statements 11 Groups 12 Procedures 13 DATA REPRESENTATION 14 Decla