I must disavow my earlier claim that all four regexp commands would
always be executed. This test seems to indicate otherwise:
$ rpm -q tcl
tcl-8.3.5-88
$ tclsh
% if [puts A;expr 1] {puts 1} elseif [puts B;expr 2] {puts 2}
A
1
% if [puts A;expr 0] {puts 1} elseif [puts B;expr 2] {puts 2}
A
B
2
%
Note that this behavior is in violation of the Tcl language syntax
described by the Tcl(n) man page.
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