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Revision 1.1, Thu Aug 23 14:29:42 2018 UTC (5 years, 9 months ago) by schwarze
Branch: MAIN
CVS Tags: VERSION_1_14_6, VERSION_1_14_5, HEAD 

Implement the roff(7) .shift and .return requests,
for example used by groff_hdtbl(7) and groff_mom(7).

Also correctly interpolate arguments during nested macro execution
even after .shift and .return, implemented using a stack of argument
arrays.

Note that only read.c, but not roff.c can detect the end of a macro
execution, and the existence of .shift implies that arguments cannot
be interpolated up front, so unfortunately, this includes a partial
revert of roff.c rev. 1.337, moving argument interpolation back into
the function roff_res().

RETURN-BASIC(1)             General Commands Manual            RETURN-BASIC(1)

NNAAMMEE
     rreettuurrnn--bbaassiicc - the return request

DDEESSCCRRIIPPTTIIOONN
     return before macro

     text from macro (1 argument: "myarg"), 0 arguments after return: "",

     return after macro

     final text

OpenBSD                         August 23, 2018                        OpenBSD