1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

//! The `std::float` module.

use crate::{ContextError, Module};
use std::num::ParseFloatError;

/// Parse an integer.
fn parse(s: &str) -> Result<f64, ParseFloatError> {
    Ok(str::parse::<f64>(s)?)
}

/// Convert a float to a whole number.
fn to_integer(value: f64) -> i64 {
    value as i64
}

crate::__internal_impl_any!(ParseFloatError);

/// Install the core package into the given functions namespace.
pub fn module() -> Result<Module, ContextError> {
    let mut module = Module::with_crate_item("std", &["float"]);

    module.ty::<ParseFloatError>()?;
    module.function(&["parse"], parse)?;
    module.inst_fn("max", f64::max)?;
    module.inst_fn("min", f64::min)?;
    module.inst_fn("abs", f64::abs)?;
    module.inst_fn("powf", f64::powf)?;
    module.inst_fn("powi", f64::powi)?;

    module.inst_fn("to_integer", to_integer)?;

    Ok(module)
}