Name scope control in APL defined functions

Authors:
G. M. Seeds;A. Arpin;M. LaBarre
Affiliations:
MCM Computers Ltd., Canada;MCM Computers Ltd., Canada;MCM Computers Ltd., Canada
Venue:
ACM SIGAPL APL Quote Quad
Year:
1978

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Abstract

The notion of LOCAL versus GLOBAL scope for names used inside defined functions has always been a source of problems in teaching and using APL, largely because it is an incomplete concept. An expanded concept is discussed in this paper, along with a proposal for implementation, which exhaustively specifies all possible scopes.