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From: Paul Rubin <no.email@nospam.invalid>
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Subject: Re: Carbon
Date: Sun, 28 Aug 2022 11:24:17 -0700
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"G.B." <bauhaus@notmyhomepage.invalid> writes:
> Stepanov reminds us that "+" is commutative...

String concatenation is not commutative, and std::string implements
operator+ for it.