[CMake] string REGEX question

[Steven Wilson]

I have the following string in a variable "C:\path\to\foo"

I want to do something like the following:

string(REGEX REPLACE "\\" "\\\\" OUTPUT_VAR ${INPUT_VAR})

where INPUT_VAR contains the original string.

I want the result to be:

C:\\path\\to\\foo

I'm just not seeing how to make this regular expression work.   If you have
any suggestions I would appreciate the help!

Thanks in advance,

Steve
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