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Also note that use v5.10; == use 5.10.0; == 5.010;. But use 5.10; == use 5.100;. Which, IMO, is not very DWIM.

An unfortunate side-effect of having two similar but very different numbering systems. At least the error message is useful.

$ perl -e'use 5.10;' Perl v5.100.0 required (did you mean v5.10.0?)--this is only v5.12.2, +stopped at -e line 1. BEGIN failed--compilation aborted at -e line 1.

I don't know whether there's a (single-line) syntax that at compile time checks for 5.10, but which doesn't enable features.

$ perl -M5.014 -e1 Perl v5.14.0 required--this is only v5.12.2, stopped. BEGIN failed--compilation aborted.

In reply to Re^2: Why version strings? by ikegami
in thread Why version strings? by gunzip

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