Embedding JSON as a string in C++ code using preprocessor
Cameron's answer is absolutely correct.
However, since C++11, there is a compiler supported method for creating raw string literals.
char const *string = R"someToken({
"name": "software rendering list",
"version": "10.9",
"entries": [
{
"id": 1,
"description": "ATI Radeon X1900 is not compatible with WebGL on the Mac",
"webkit_bugs": [47028],
"os": {
"type": "macosx"
},
"vendor_id": "0x1002",
"device_id": ["0x7249"],
"features": [
"webgl",
"flash_3d",
"flash_stage3d"
]
},
{
"id": 3,
"description": "GL driver is software rendered. GPU acceleration is disabled",
"cr_bugs": [59302, 315217],
"os": {
"type": "linux"
},
"gl_renderer": "(?i).*software.*",
"features": [
"all"
]
}
]
})someToken";
Note, however, that there are several subtle differences.
Most obviously, the macro will get rid of C/C++ comments and the macro will coalesce all whitespace into a single space.
Further details about string literals can be found in lots of places. I like this one.
You guessed right!
#
inside a macro body turns the subsequent token into a C string literal containing that token's text. In this case, the next token is the special __VA_ARGS__
macro keyword that is substituted with all the arguments to the (variadic) macro, which corresponds to the JSON in the source code.