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//! This module implements the backing representation of runtime
//! values in the Nix language.
use crate::errors::{Error, EvalResult};
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum Value {
Null,
Bool(bool),
Integer(i64),
Float(f64),
}
impl Value {
pub fn is_number(&self) -> bool {
match self {
Value::Integer(_) => true,
Value::Float(_) => true,
_ => false,
}
}
pub fn type_of(&self) -> &'static str {
match self {
Value::Null => "null",
Value::Bool(_) => "bool",
Value::Integer(_) => "int",
Value::Float(_) => "float",
}
}
pub fn as_bool(self) -> EvalResult<bool> {
match self {
Value::Bool(b) => Ok(b),
other => Err(Error::TypeError {
expected: "bool",
actual: other.type_of(),
}),
}
}
}
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum NumberPair {
Floats(f64, f64),
Integer(i64, i64),
}
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