Hi,

It is possibile to transform a string representing a hexadecimal number in the format "0xnumber" or "number" (without "0x") in an integer with lexical_cast<>?

In my experience, lexical_cast<> cannot transform a string representing a hexadecimal number into an integer. unsigned int x = lexical_cast("0x0badc0de"); // throw bad_lexical_cast Instead of using lexical_cast<>, you should use stringstream to do this kind of transform. For example, see the link below: http://stackoverflow.com/questions/1070497/c-convert-hex-string-to-signed-in... Regards, chenwj -- Wei-Ren Chen (陳韋任) Tel:886-2-2788-3799 #1667 Parallel Processing Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.)

Hi, On 2 December 2010 22:27, Claude wrote:

Hi!

It is possibile to transform a string representing a hexadecimal number in the format "0xnumber" or "number" (without "0x") in an integer with lexical_cast<>?

There's another option I've been working on, construe_cast, which can be found here: https://github.com/VeXocide/construe_cast. It's a replacement for lexical_cast which I hope will make it into boost one day. The main difference is that whilst lexical_cast uses iostreams for its conversion, construe_cast is based off of boost.spirit. This means it's considerable faster at run-time and I've added support for tags some time ago, thus you can use: boost::construe_cast("2c4") At the moment there is no support for "0x2c4" but that should be added later today (the tag::hex will then support "0x2c4", "0X2c4" as well as "2c4"). Documentation is still on the todo-list and something I hope to get to soon, but if you have any questions don't hesitate to ask them. Regards, Jeroen Habraken