IMPLEMENTATION_DEFINED.md

Implementation Defined parts of the standard

Is char signed or unsigned?

Signed.

How large are data types on each architecture?

See the src/arch folder, excluding src/arch/mod.rs.

How does right-shift behave on negative integers?

It performs an arithmetic shift, keeping the sign of the value. For example, -3 >> 1 in binary is 1111...1101 >> 1, and shifted right will be 1111...1110, or -2. This is the same as dividing by two and rounding towards negative infinity.

Does inline do anything?

Currently it is not parsed, see jyn514#84. Once it is parsed it will be ignored.

Does register do anything?

No.

Are there any differences from the C standard?

Yes, hexadecimal constants are not required to have an exponent. See the hexponent docs and #483 for more information.