Why is `ser` std gated?

[jbis9051]

I need canonical JSON support in a no_std but alloc environment.

From evik42/serde-json-canonicalizer#4:

serde_json does not expose the Serializer and Formatter traits in a no_std build

It seems these are in the ser module

json/src/ser.rs

Line 17 in d12e943

pub struct Serializer<W, F = CompactFormatter> {

json/src/ser.rs

Line 1541 in d12e943

pub trait Formatter {

But

json/src/lib.rs

Lines 422 to 426 in d12e943

	#[cfg(feature = "std")]
	#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
	pub mod ser;
	#[cfg(not(feature = "std"))]
	mod ser;

ser appears to still be compiled in no_std environments, just not public.

Why is this? What is preventing ser and more specifically Serializer and Formatter from being public in no_std environments?

[jbis9051]

Seeing #1122. The example you give mostly deal with io module. Going to look into a solution.

[jbis9051]

Might be solved by #1280