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use crate::Loc;
#[cfg(not(feature = "c-structures"))]
pub(crate) mod rust {
use super::Loc;
/// Rust-compatible nullable pointer
pub type MaybeLoc = Option<Loc>;
use super::MaybeLocSome;
impl MaybeLocSome for MaybeLoc {
fn some(loc: Loc) -> Self {
Some(loc)
}
}
use super::MaybeLocNone;
impl MaybeLocNone for MaybeLoc {
fn none() -> Self {
None
}
}
use super::AsLocOption;
impl AsLocOption for MaybeLoc {
fn as_option(&self) -> Option<&Loc> {
self.as_ref()
}
}
use super::IntoLocOption;
impl IntoLocOption for MaybeLoc {
fn into_option(self) -> Option<Loc> {
self
}
}
}
#[cfg(feature = "c-structures")]
pub(crate) mod c {
use crate::Loc;
/// C-compatible Option<Loc>
#[repr(C)]
#[derive(PartialEq)]
pub enum MaybeLoc {
/// Equivalent of Option::Some
Some(Loc),
/// Equivalent of Option::None
None,
}
impl std::fmt::Debug for MaybeLoc {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
std::fmt::Debug::fmt(&self.as_option(), f)
}
}
impl Clone for MaybeLoc {
fn clone(&self) -> Self {
match self.as_option() {
Some(loc) => Self::some(loc.clone()),
None => Self::none(),
}
}
}
use super::MaybeLocSome;
impl MaybeLocSome for MaybeLoc {
fn some(loc: Loc) -> Self {
Self::Some(loc)
}
}
use super::MaybeLocNone;
impl MaybeLocNone for MaybeLoc {
fn none() -> Self {
Self::None
}
}
impl MaybeLoc {
// /// Constructs a pointer with a given raw pointer
// pub fn from_raw(ptr: *mut Loc) -> Self {
// Self { ptr }
// }
// /// Unwraps into raw pointer, consumes self
// pub fn into_raw(mut self) -> *mut Loc {
// let ptr = self.ptr;
// self.ptr = std::ptr::null_mut();
// ptr
// }
/// Equivalent of Option::or_else
pub fn or_else<F>(self, f: F) -> Self
where
F: FnOnce() -> Self,
{
if self.is_none() {
f()
} else {
self
}
}
/// Equivalent of Option::unwrap
pub fn unwrap(self) -> Loc {
match self {
MaybeLoc::Some(loc) => loc,
MaybeLoc::None => panic!("failed to unwrap MaybeLoc::None"),
}
}
/// Equivalent of Option::unwrap_or_else
pub fn unwrap_or_else<F>(self, f: F) -> Loc
where
F: FnOnce() -> Loc,
{
match self {
MaybeLoc::Some(loc) => loc,
MaybeLoc::None => f(),
}
}
/// Equivalent of Option::expect
pub fn expect(self, message: &str) -> Loc {
match self {
MaybeLoc::Some(loc) => loc,
MaybeLoc::None => panic!("{}", message),
}
}
/// Equivalent of Option::map
pub fn map<F>(self, f: F) -> Self
where
F: FnOnce(Loc) -> Loc,
{
match self {
MaybeLoc::Some(loc) => Self::Some(f(loc)),
MaybeLoc::None => Self::None,
}
}
/// Equivalent of Option::is_none
pub fn is_none(&self) -> bool {
matches!(self, MaybeLoc::None)
}
/// Equivalent of Option::is_some
pub fn is_some(&self) -> bool {
matches!(self, MaybeLoc::Some(_))
}
}
use super::AsLocOption;
impl AsLocOption for MaybeLoc {
fn as_option(&self) -> Option<&Loc> {
match self {
MaybeLoc::Some(loc) => Some(loc),
MaybeLoc::None => None,
}
}
}
use super::IntoLocOption;
impl IntoLocOption for MaybeLoc {
fn into_option(self) -> Option<Loc> {
match self {
MaybeLoc::Some(loc) => Some(loc),
MaybeLoc::None => None,
}
}
}
}
pub(crate) trait MaybeLocSome {
fn some(value: Loc) -> Self
where
Self: Sized;
}
pub(crate) trait MaybeLocNone {
fn none() -> Self
where
Self: Sized;
}
/// Trait for converting &MaybeLoc into Option<&Loc>
pub trait AsLocOption {
/// Converts &MaybeLoc into Option<&Loc>
fn as_option(&self) -> Option<&Loc>;
}
pub(crate) trait IntoLocOption {
fn into_option(self) -> Option<Loc>
where
Self: Sized;
}