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use crate::Keyword;
use locspan::Meta;
use locspan_derive::*;
#[derive(
Clone,
Copy,
PartialEq,
StrippedPartialEq,
Eq,
StrippedEq,
PartialOrd,
StrippedPartialOrd,
Ord,
StrippedOrd,
Hash,
Debug,
)]
pub enum ContainerKind {
Graph,
Id,
Index,
Language,
List,
Set,
Type,
}
impl ContainerKind {
pub fn into_keyword(self) -> Keyword {
self.into()
}
pub fn keyword(&self) -> Keyword {
self.into_keyword()
}
pub fn as_str(&self) -> &'static str {
self.into_keyword().into_str()
}
}
impl<'a> TryFrom<&'a str> for ContainerKind {
type Error = &'a str;
fn try_from(str: &'a str) -> Result<ContainerKind, &'a str> {
use ContainerKind::*;
match str {
"@graph" => Ok(Graph),
"@id" => Ok(Id),
"@index" => Ok(Index),
"@language" => Ok(Language),
"@list" => Ok(List),
"@set" => Ok(Set),
"@type" => Ok(Type),
_ => Err(str),
}
}
}
impl TryFrom<Keyword> for ContainerKind {
type Error = Keyword;
fn try_from(k: Keyword) -> Result<ContainerKind, Keyword> {
use ContainerKind::*;
match k {
Keyword::Graph => Ok(Graph),
Keyword::Id => Ok(Id),
Keyword::Index => Ok(Index),
Keyword::Language => Ok(Language),
Keyword::List => Ok(List),
Keyword::Set => Ok(Set),
Keyword::Type => Ok(Type),
k => Err(k),
}
}
}
impl From<ContainerKind> for Keyword {
fn from(c: ContainerKind) -> Keyword {
use ContainerKind::*;
match c {
Graph => Keyword::Graph,
Id => Keyword::Id,
Index => Keyword::Index,
Language => Keyword::Language,
List => Keyword::List,
Set => Keyword::Set,
Type => Keyword::Type,
}
}
}
impl<M> From<ContainerKind> for Container<M> {
fn from(c: ContainerKind) -> Self {
Container::One(c)
}
}
#[derive(
Clone,
PartialEq,
StrippedPartialEq,
Eq,
StrippedEq,
PartialOrd,
StrippedPartialOrd,
Ord,
StrippedOrd,
Hash,
Debug,
)]
#[locspan(ignore(M))]
pub enum Container<M> {
One(ContainerKind),
Many(Vec<Meta<ContainerKind, M>>),
}
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub enum ContainerRef<'a, M> {
One(ContainerKind),
Many(&'a [Meta<ContainerKind, M>]),
}
impl<'a, M> ContainerRef<'a, M> {
pub fn is_array(&self) -> bool {
matches!(self, Self::Many(_))
}
pub fn sub_fragments(&self) -> SubValues<'a, M> {
match self {
Self::One(_) => SubValues::None,
Self::Many(m) => SubValues::Many(m.iter()),
}
}
}
impl<'a, M> From<&'a Container<M>> for ContainerRef<'a, M> {
fn from(c: &'a Container<M>) -> Self {
match c {
Container::One(c) => Self::One(*c),
Container::Many(m) => Self::Many(m),
}
}
}
pub enum SubValues<'a, M> {
None,
Many(std::slice::Iter<'a, Meta<ContainerKind, M>>),
}
impl<'a, M> Iterator for SubValues<'a, M> {
type Item = &'a Meta<ContainerKind, M>;
fn size_hint(&self) -> (usize, Option<usize>) {
match self {
Self::None => (0, Some(0)),
Self::Many(m) => m.size_hint(),
}
}
fn next(&mut self) -> Option<Self::Item> {
match self {
Self::None => None,
Self::Many(m) => m.next(),
}
}
}
impl<'a, M> ExactSizeIterator for SubValues<'a, M> {}
impl<'a, M> DoubleEndedIterator for SubValues<'a, M> {
fn next_back(&mut self) -> Option<Self::Item> {
match self {
Self::None => None,
Self::Many(m) => m.next_back(),
}
}
}