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use rand::Rng;
use crate::native::{self, NativeFunction, NativeFunctionResult};
use crate::value::Primitive;
use crate::value::Primitive::{Float, Integer};
use crate::VM;
fn gen(_vm: &mut VM, _args: &[Primitive]) -> NativeFunctionResult {
let value = rand::thread_rng().gen_range(0.0..1.0);
Ok(Float(value))
}
pub const GEN_FUNCTION: NativeFunction = NativeFunction {
name: "rand$gen",
function: gen,
arity: 0,
returns_value: true,
doc: Some(
"NativeFunction rand$gen:\n\tdesc: Returns a random number in the range `0.0 .. \
1.0`\n\tExample: `var num = rand$gen(); # num could be any number from 0.0 to 1.0`",
),
};
fn gen_range(_vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
let min = args.get(0).cloned();
let max = args.get(1).cloned();
let (Some(Integer(min)), Some(Integer(max))) = (min, max) else {
return Err(native::Error::InvalidArgument);
};
let value = rand::thread_rng().gen_range(min..max);
Ok(Integer(value))
}
pub const GEN_RANGE_FUNCTION: NativeFunction = NativeFunction {
name: "rand$gen_range",
function: gen_range,
arity: 2,
returns_value: true,
doc: Some(
"NativeFunction rand$gen_range: \n\targs: min (int), max (int)\n\tdesc: Returns a random \
numnber in the range <min> .. <max>\n\tExample: `var num = rand$gen_range(20, 76); # num \
could be any number from 20 to 76`",
),
};
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