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use std::{
convert::From,
hash::{Hash, Hasher},
};
use crate::{
binding::symbol,
types::{Value, ValueType},
AnyObject, Object, Proc, VerifiedObject,
};
/// `Symbol`
#[derive(Debug)]
#[repr(C)]
pub struct Symbol {
value: Value,
}
impl Symbol {
/// Creates a new instance of Ruby `Symbol`.
///
/// # Examples
///
/// ```
/// use rutie::{Symbol, VM};
/// # VM::init();
///
/// let symbol = Symbol::new("hello");
///
/// assert_eq!(symbol.to_str(), "hello");
/// ```
///
/// Ruby:
///
/// ```ruby
/// sym = :hello
///
/// sym.to_s == 'hello'
/// ```
pub fn new(string: &str) -> Self {
let id = symbol::internal_id(string);
Self::from(symbol::id_to_sym(id))
}
/// Retrieves the Rust `&str` corresponding to `Symbol` object (Ruby `Symbol#to_s`).
///
/// # Examples
///
/// ```
/// use rutie::{Symbol, VM};
/// # VM::init();
///
/// let symbol = Symbol::new("hello");
///
/// assert_eq!(symbol.to_str(), "hello");
/// ```
///
/// Ruby:
///
/// ```ruby
/// sym = :hello
///
/// sym.to_s == 'hello'
/// ```
pub fn to_str(&self) -> &str {
symbol::value_to_str(self.value())
}
/// Retrieves the Rust `String` corresponding to `Symbol` object (Ruby `Symbol#to_s`).
///
/// # Examples
///
/// ```
/// use rutie::{Symbol, VM};
/// # VM::init();
///
/// let symbol = Symbol::new("hello");
///
/// assert_eq!(symbol.to_string(), "hello");
/// ```
///
/// Ruby:
///
/// ```ruby
/// sym = :hello
///
/// sym.to_s == 'hello'
/// ```
pub fn to_string(&self) -> String {
symbol::value_to_string(self.value())
}
/// Converts `Symbol` to `Proc`
///
/// # Examples
///
/// ```
/// use rutie::{Symbol, Proc, VM, VerifiedObject};
/// # VM::init();
///
/// let symbol = Symbol::new("hello");
///
/// assert!(Proc::is_correct_type(&symbol.to_proc()), "not correct type!");
/// ```
///
/// Ruby:
///
/// ```ruby
/// sym = :hello
///
/// sym.to_s == 'hello'
/// ```
pub fn to_proc(&self) -> Proc {
Proc::from(unsafe { self.send("to_proc", &[]) }.value())
}
}
impl From<Value> for Symbol {
fn from(value: Value) -> Self {
Symbol { value }
}
}
impl Into<Value> for Symbol {
fn into(self) -> Value {
self.value
}
}
impl Into<AnyObject> for Symbol {
fn into(self) -> AnyObject {
AnyObject::from(self.value)
}
}
impl Object for Symbol {
#[inline]
fn value(&self) -> Value {
self.value
}
}
impl VerifiedObject for Symbol {
fn is_correct_type<T: Object>(object: &T) -> bool {
object.value().ty() == ValueType::Symbol
}
fn error_message() -> &'static str {
"Error converting to Symbol"
}
}
impl PartialEq for Symbol {
fn eq(&self, other: &Self) -> bool {
self.equals(other)
}
}
impl Eq for Symbol {}
impl Hash for Symbol {
fn hash<H>(&self, state: &mut H)
where
H: Hasher,
{
self.value().value.hash(state);
}
}