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use std::convert::From;
use binding::string;
use types::{Value, ValueType};
use {Object, VerifiedObject};
/// `String`
#[derive(Debug, PartialEq)]
pub struct RString {
value: Value,
}
impl RString {
/// Creates a new instance of Ruby `String` containing given `string`.
///
/// # Examples
///
/// ```
/// use ruru::{RString, VM};
/// # VM::init();
///
/// let string = RString::new("Hello, World!");
///
/// assert_eq!(string.to_string(), "Hello, World!".to_string());
/// ```
///
/// Ruby:
///
/// ```ruby
/// str = 'Hello, World!'
///
/// str == 'Hello, World!'
/// ```
pub fn new(string: &str) -> Self {
Self::from(string::new(string))
}
/// Retrieves underlying Rust `String` from Ruby `String` object.
///
/// # Examples
///
/// ```
/// use ruru::{RString, VM};
/// # VM::init();
///
/// let string = RString::new("Hello, World!");
///
/// assert_eq!(string.to_string(), "Hello, World!".to_string());
/// ```
///
/// Ruby:
///
/// ```ruby
/// str = 'Hello, World!'
///
/// str == 'Hello, World!'
/// ```
pub fn to_string(&self) -> String {
string::value_to_string(self.value())
}
/// Retrieves underlying Rust `String` from Ruby `String` object.
///
/// Unlike `to_string()` it does not perform any checks for internal null-bytes.
///
/// This function may be used to safely get binary data from Ruby.
///
/// # Examples
///
/// ```no_run
/// use ruru::{RString, VM};
/// # VM::init();
///
/// let string = RString::new("Hello,\0World!");
///
/// assert_eq!(string.to_string_unchecked(), "Hello,\0World!".to_string());
/// ```
///
/// Ruby:
///
/// ```ruby
/// str = 'Hello,\0World!'
///
/// str == 'Hello,\0World!'
/// ```
pub fn to_string_unchecked(&self) -> String {
string::value_to_string_unchecked(self.value())
}
/// Retrieves underlying `&str` from Ruby `String` object.
///
/// # Examples
///
/// ```
/// use ruru::{RString, VM};
/// # VM::init();
///
/// let string = RString::new("Hello, World!");
///
/// assert_eq!(string.to_str(), "Hello, World!");
/// ```
///
/// Ruby:
///
/// ```ruby
/// str = 'Hello, World!'
///
/// str == 'Hello, World!'
/// ```
pub fn to_str(&self) -> &str {
let value = self.value();
string::value_to_str(value)
}
/// Retrieves underlying `&str` from Ruby `String` object.
///
/// Unlike `to_str()` it does not perform any checks for internal null-bytes.
///
/// This function may be used to safely get binary data from Ruby.
///
/// # Examples
///
/// ```no_run
/// use ruru::{RString, VM};
/// # VM::init();
///
/// let string = RString::new("Hello,\0World!");
///
/// assert_eq!(string.to_str_unchecked(), "Hello,\0World!");
/// ```
///
/// Ruby:
///
/// ```ruby
/// str = 'Hello,\0World!'
///
/// str == 'Hello,\0World!'
/// ```
pub fn to_str_unchecked(&self) -> &str {
let value = self.value();
string::value_to_str_unchecked(value)
}
/// Returns the length of the string in bytes
///
/// # Examples
///
/// ```
/// use ruru::{RString, VM};
/// # VM::init();
///
/// let string = RString::new("Hello, World!");
/// let utf8_string = RString::new("⓯");
///
/// assert_eq!(string.bytesize(), 13);
/// assert_eq!(utf8_string.bytesize(), 3);
/// ```
///
/// Ruby:
///
/// ```ruby
/// string = 'Hello, World!'
/// utf8_string = '⓯'
///
/// string.bytesize == 13
/// utf8_string.bytesize == 3
/// ```
pub fn bytesize(&self) -> i64 {
string::bytesize(self.value())
}
}
impl From<Value> for RString {
fn from(value: Value) -> Self {
RString { value: value }
}
}
impl Object for RString {
#[inline]
fn value(&self) -> Value {
self.value
}
}
impl VerifiedObject for RString {
fn is_correct_type<T: Object>(object: &T) -> bool {
object.value().ty() == ValueType::RString
}
fn error_message() -> &'static str {
"Error converting to String"
}
}