Draft: Add log support #890
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This is just an experiment for now.
If the 'no-interning' feature is set, instead of
#[export_name = "{JSON...}"]
static S: u8 = 0;
&S as *const _ as usize
You get:
static S: &'static str = "{JSON...}";
&S as *const _ as usize
Note that I had to change the size of the interned ID from u16 to usize, because with no-interning it's now a pointer to actual data.
This is a work in progress, but it shows how, with the new `no-interning` feature, a crate can capture defmt log data, including the actual format string, and render locally. TODO: Actually parse the format string.
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This is a work-in-progress branch investigating whether you can grab the format string at logging time without breaking the 0.3 API.
It adds a new feature called 'no-interning' and a new transport crate called
defmt-logwhich turns the feature on and uses it to grab the format string out of thin air (well, out of a&[u8]that's the same length as the size of ausize).