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[Bug-apl] Macros

From: Juergen Sauermann
Subject: [Bug-apl] Macros
Date: Sat, 11 Jun 2016 16:50:58 +0200
User-agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.4.0


as of SVN 740 I have started to use a new internal concept in GNU APL:  macros.

A macro is simply a defined function that is used by the interpreter itself. Currently
a macro is called when a primitive operator is called with a defined function as function
argument (therefore the performance impact should be minor). This case (primitive operator
with defined functions) had caused numerous problems in the past.

As of SVN 740, the operators  ¨  ∘.f  g.f and have been changed (and simplified considerably)
to use macros. The others will follow as time allows. In the long run EOC handlers will hopefully
either become simpler (no more EOC_args) or disappear completely.

An incompatibility caused by this change is that some EOC handlers have disappeared and therefore
old workspaces that were )SAVEd with a non-empty )SI stack and having pending built-in operators with
defined functions on the )SI stack can no longer be )LOADed. Please perform a


sequence if you have such workspaces before updating to SVN 740 or later.

/// Jürgen

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