# Type Definition std::os::raw::c_double
1.1.0[−][src]

    type c_double = f64;

Equivalent to C’s `double` type.

This type will almost always be `f64`, which is guaranteed to be an IEEE-754 double-precision float in Rust. That said, the standard technically only guarantees that it be a floating-point number with at least the precision of a `float`, and it may be `f32` or something entirely different from the IEEE-754 standard.