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use std::convert::From;
use crate::{
binding::fixnum,
types::{Value, ValueType},
AnyObject, Object, VerifiedObject,
};
/// `Fixnum`
#[derive(Debug)]
#[repr(C)]
pub struct Fixnum {
value: Value,
}
impl Fixnum {
/// Creates a new `Fixnum`.
///
/// # Examples
///
/// ```
/// use rutie::{Fixnum, VM};
/// # VM::init();
///
/// let fixnum = Fixnum::new(1);
///
/// assert_eq!(fixnum.to_i64(), 1);
/// ```
///
/// Ruby:
///
/// ```ruby
/// 1 == 1
/// ```
pub fn new(num: i64) -> Self {
Self::from(fixnum::i64_to_num(num))
}
/// Retrieves an `i64` value from `Fixnum`.
///
/// # Examples
///
/// ```
/// use rutie::{Fixnum, VM};
/// # VM::init();
///
/// let fixnum = Fixnum::new(1);
///
/// assert_eq!(fixnum.to_i64(), 1);
/// ```
///
/// Ruby:
///
/// ```ruby
/// 1 == 1
/// ```
pub fn to_i64(&self) -> i64 {
fixnum::num_to_i64(self.value())
}
/// Retrieves an `u64` value from `Fixnum`.
///
/// # Examples
///
/// ```
/// use rutie::{Fixnum, VM};
/// # VM::init();
///
/// let fixnum = Fixnum::new(1);
///
/// assert_eq!(fixnum.to_u64(), 1);
/// ```
///
/// Ruby:
///
/// ```ruby
/// 1 == 1
/// ```
pub fn to_u64(&self) -> u64 {
fixnum::num_to_u64(self.value())
}
/// Retrieves an `i32` value from `Fixnum`.
///
/// # Examples
///
/// ```
/// use rutie::{Fixnum, VM};
/// # VM::init();
///
/// let fixnum = Fixnum::new(1);
///
/// assert_eq!(fixnum.to_i32(), 1);
/// ```
///
/// Ruby:
///
/// ```ruby
/// 1 == 1
/// ```
pub fn to_i32(&self) -> i32 {
fixnum::num_to_i32(self.value())
}
/// Retrieves a `u32` value from `Fixnum`.
///
/// # Examples
///
/// ```
/// use rutie::{Fixnum, VM};
/// # VM::init();
///
/// let fixnum = Fixnum::new(1);
///
/// assert_eq!(fixnum.to_u32(), 1);
/// ```
///
/// Ruby:
///
/// ```ruby
/// 1 == 1
/// ```
pub fn to_u32(&self) -> u32 {
fixnum::num_to_u32(self.value())
}
}
impl From<Value> for Fixnum {
fn from(value: Value) -> Self {
Fixnum { value }
}
}
impl Into<Value> for Fixnum {
fn into(self) -> Value {
self.value
}
}
impl Into<AnyObject> for Fixnum {
fn into(self) -> AnyObject {
AnyObject::from(self.value)
}
}
impl Object for Fixnum {
#[inline]
fn value(&self) -> Value {
self.value
}
}
impl VerifiedObject for Fixnum {
fn is_correct_type<T: Object>(object: &T) -> bool {
object.value().ty() == ValueType::Fixnum
}
fn error_message() -> &'static str {
"Error converting to Fixnum"
}
}
impl PartialEq for Fixnum {
fn eq(&self, other: &Self) -> bool {
self.equals(other)
}
}
#[cfg(test)]
mod tests {
use crate::{AnyObject, Fixnum, Float, Object, VerifiedObject, VM};
#[test]
fn test_fixnum() {
crate::on_ruby_thread(|| {
let number = Fixnum::new(-42);
assert_eq!(number.to_i64(), -42);
assert_eq!(number.to_i32(), -42);
assert_eq!(Fixnum::new(42).to_u64(), 42);
assert_eq!(Fixnum::new(42).to_u32(), 42);
assert_eq!(Fixnum::new(i32::MAX as i64).to_i32(), i32::MAX);
// Out of range for i32: Ruby raises RangeError.
let result = VM::protect(|| {
Fixnum::new(i64::from(i32::MAX) + 1).to_i32();
crate::NilClass::new().into()
});
assert!(result.is_err());
VM::clear_error_info();
let any: AnyObject = Fixnum::new(-42).into();
assert!(Fixnum::is_correct_type(&any));
assert!(!Fixnum::is_correct_type(&Float::new(1.0)));
assert_eq!(any.try_convert_to::<Fixnum>(), Ok(Fixnum::new(-42)));
assert!(Float::new(1.0).try_convert_to::<Fixnum>().is_err());
let sum = VM::eval("20 + 22")
.unwrap()
.try_convert_to::<Fixnum>()
.unwrap();
assert_eq!(sum, Fixnum::new(42));
assert_ne!(sum, number);
});
}
}