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use iref::IriBuf;
use langtag::LanguageTagBuf;
use std::borrow::{Borrow, BorrowMut};
use std::fmt;
use std::ops::{Deref, DerefMut};
use std::str::FromStr;
#[derive(Clone, PartialEq, Eq, Hash, PartialOrd, Ord, Debug)]
pub enum Literal<S = StringLiteral, I = IriBuf, L = LanguageTagBuf> {
String(S),
TypedString(S, I),
LangString(S, L),
}
impl<S, I, L> Literal<S, I, L> {
pub fn is_typed(&self) -> bool {
matches!(self, Self::TypedString(_, _))
}
pub fn ty(&self) -> Option<&I> {
match self {
Self::TypedString(_, ty) => Some(ty),
_ => None,
}
}
pub fn is_lang_string(&self) -> bool {
matches!(self, Self::LangString(_, _))
}
pub fn lang_tag(&self) -> Option<&L> {
match self {
Self::LangString(_, tag) => Some(tag),
_ => None,
}
}
pub fn string_literal(&self) -> &S {
match self {
Self::String(s) => s,
Self::TypedString(s, _) => s,
Self::LangString(s, _) => s,
}
}
pub fn into_string_literal(self) -> S {
match self {
Self::String(s) => s,
Self::TypedString(s, _) => s,
Self::LangString(s, _) => s,
}
}
}
#[derive(Default, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct StringLiteral(String);
impl StringLiteral {
pub fn new() -> Self {
Self::default()
}
}
impl PartialEq<String> for StringLiteral {
fn eq(&self, other: &String) -> bool {
self.as_str().eq(other.as_str())
}
}
impl PartialEq<str> for StringLiteral {
fn eq(&self, other: &str) -> bool {
self.as_str().eq(other)
}
}
impl PartialEq<StringLiteral> for String {
fn eq(&self, other: &StringLiteral) -> bool {
self.as_str().eq(other.as_str())
}
}
impl PartialEq<StringLiteral> for str {
fn eq(&self, other: &StringLiteral) -> bool {
self.eq(other.as_str())
}
}
impl From<String> for StringLiteral {
fn from(s: String) -> Self {
Self(s)
}
}
impl From<StringLiteral> for String {
fn from(s: StringLiteral) -> Self {
s.0
}
}
impl FromStr for StringLiteral {
type Err = std::convert::Infallible;
fn from_str(s: &str) -> Result<Self, std::convert::Infallible> {
Ok(Self(s.to_owned()))
}
}
impl Deref for StringLiteral {
type Target = String;
fn deref(&self) -> &String {
&self.0
}
}
impl DerefMut for StringLiteral {
fn deref_mut(&mut self) -> &mut String {
&mut self.0
}
}
impl Borrow<str> for StringLiteral {
fn borrow(&self) -> &str {
self.0.as_str()
}
}
impl BorrowMut<str> for StringLiteral {
fn borrow_mut(&mut self) -> &mut str {
self.0.as_mut_str()
}
}
impl AsRef<str> for StringLiteral {
fn as_ref(&self) -> &str {
self.0.as_str()
}
}
impl AsMut<str> for StringLiteral {
fn as_mut(&mut self) -> &mut str {
self.0.as_mut_str()
}
}
impl fmt::Display for StringLiteral {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "\"")?;
for c in self.0.chars() {
match c {
'"' => write!(f, "\\u0022"),
'\\' => write!(f, "\\u005c"),
'\n' => write!(f, "\\n"),
'\r' => write!(f, "\\r"),
'\t' => write!(f, "\\t"),
'\u{08}' => write!(f, "\\b"),
'\u{0c}' => write!(f, "\\f"),
c => c.fmt(f),
}?
}
write!(f, "\"")
}
}
impl fmt::Display for Literal {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Self::String(s) => s.fmt(f),
Self::TypedString(s, ty) => write!(f, "{}^^<{}>", s, ty),
Self::LangString(s, tag) => write!(f, "{}@{}", s, tag),
}
}
}
