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use std::borrow::Cow;
use std::str::FromStr;
use combine::stream::position::Stream;
use crate::encode::{to_string_repr, StringStyle};
use crate::parser;
use crate::parser::is_unquoted_char;
use crate::repr::{Decor, InternalString, Repr};
#[derive(Debug, Eq, PartialEq, PartialOrd, Ord, Hash, Clone)]
pub struct Key {
key: InternalString,
pub(crate) repr: Option<Repr>,
pub(crate) decor: Decor,
}
impl Key {
pub fn new(key: impl AsRef<str>) -> Self {
Self {
key: key.as_ref().into(),
repr: None,
decor: Default::default(),
}
}
pub(crate) fn with_repr_unchecked(mut self, repr: Repr) -> Self {
self.repr = Some(repr);
self
}
pub fn with_decor(mut self, decor: Decor) -> Self {
self.decor = decor;
self
}
pub fn get(&self) -> &str {
&self.key
}
pub fn to_repr(&self) -> Cow<Repr> {
self.repr
.as_ref()
.map(Cow::Borrowed)
.unwrap_or_else(|| Cow::Owned(to_key_repr(&self.key)))
}
pub fn decor_mut(&mut self) -> &mut Decor {
&mut self.decor
}
pub fn decor(&self) -> &Decor {
&self.decor
}
pub fn fmt(&mut self) {
self.repr = Some(to_key_repr(&self.key));
}
fn try_parse(s: &str) -> Result<Key, parser::TomlError> {
use combine::EasyParser;
let result = parser::key_parser().easy_parse(Stream::new(s));
match result {
Ok((_, ref rest)) if !rest.input.is_empty() => {
Err(parser::TomlError::from_unparsed(rest.positioner, s))
}
Ok(((raw, key), _)) => Ok(Key::new(key).with_repr_unchecked(Repr::new_unchecked(raw))),
Err(e) => Err(parser::TomlError::new(e, s)),
}
}
}
impl FromStr for Key {
type Err = parser::TomlError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let basic = format!("\"{}\"", s);
let literal = format!("'{}'", s);
Key::try_parse(s)
.or_else(|_| Key::try_parse(&basic))
.or_else(|_| Key::try_parse(&literal))
}
}
fn to_key_repr(key: &str) -> Repr {
if key.chars().all(is_unquoted_char) && !key.is_empty() {
Repr::new_unchecked(key)
} else {
to_string_repr(key, Some(StringStyle::OnelineSingle), Some(false))
}
}
impl<'b> From<&'b str> for Key {
fn from(s: &'b str) -> Self {
Key::new(s)
}
}
impl<'b> From<&'b String> for Key {
fn from(s: &'b String) -> Self {
Key::new(s)
}
}
impl From<String> for Key {
fn from(s: String) -> Self {
Key::new(s)
}
}
#[doc(hidden)]
impl From<Key> for InternalString {
fn from(key: Key) -> InternalString {
key.key
}
}