[Boost-users] [Format] Formatting some string chars not encoding to hex

Subject: [Boost-users] [Format] Formatting some string chars not encoding to hex
From: Michael Powell (mwpowellhtx_at_[hidden])
Date: 2019-01-22 22:35:58

Hello,

I've got some characters that are not formatting to hex properly. They
are not being interpreted correctly by the strongly typed Format.

For instance, consider the format string:

const char x = '$'; // also, '_', for instance
const auto s = (boost::format("\\x%1$02x") % x).str();

I would expect this to encode to: "\\x24", however, instead this
encodes to "\\x0$".

I would expect '_' to encode: "\\x5f", however, this encodes to "\\x0_".

In a few words, the encoding is "seeing" the char as a literal char
instead of as an "integer".

Although I could possibly trap for this as being the case, I do not
think that I should.

Thoughts? Format authors?

Best regards,

Michael Powell