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|
use crate::imports::ImportRoot;
use dhall_core::*;
use std::marker::PhantomData;
macro_rules! derive_other_traits {
($ty:ident) => {
impl std::cmp::PartialEq for $ty {
fn eq(&self, other: &Self) -> bool {
self.0 == other.0
}
}
impl std::fmt::Display for $ty {
fn fmt(
&self,
f: &mut std::fmt::Formatter,
) -> Result<(), std::fmt::Error> {
self.0.fmt(f)
}
}
};
}
macro_rules! derive_other_traits_ {
($ty:ident) => {
impl<'a> std::cmp::PartialEq for $ty<'a> {
fn eq(&self, other: &Self) -> bool {
self.0 == other.0
}
}
impl<'a> std::fmt::Display for $ty<'a> {
fn fmt(
&self,
f: &mut std::fmt::Formatter,
) -> Result<(), std::fmt::Error> {
self.0.fmt(f)
}
}
};
}
#[derive(Debug, Clone, Eq)]
pub struct Parsed<'a>(
pub(crate) SubExpr<X, Import>,
pub(crate) ImportRoot,
pub(crate) PhantomData<&'a ()>,
);
derive_other_traits_!(Parsed);
#[derive(Debug, Clone, Eq)]
pub struct Resolved<'a>(
pub(crate) SubExpr<X, Normalized>,
pub(crate) PhantomData<&'a ()>,
);
derive_other_traits_!(Resolved);
#[derive(Debug, Clone, Eq)]
pub struct Typed(pub(crate) SubExpr<X, Normalized>, pub(crate) Option<Type>);
derive_other_traits!(Typed);
#[derive(Debug, Clone, Eq)]
pub struct Normalized(pub(crate) SubExpr<X, X>, pub(crate) Option<Type>);
derive_other_traits!(Normalized);
/// An expression of type `Type` (like `Bool` or `Natural -> Text`, but not `Type`)
#[derive(Debug, Clone, Eq)]
pub struct SimpleType(pub(crate) SubExpr<X, X>);
derive_other_traits!(SimpleType);
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Type(pub(crate) TypeInternal);
#[derive(Debug, Clone, PartialEq, Eq)]
pub(crate) enum TypeInternal {
Expr(Box<Normalized>),
// The type of `Sort`
SuperType,
}
// Exposed for the macros
#[doc(hidden)]
impl From<SimpleType> for SubExpr<X, X> {
fn from(x: SimpleType) -> SubExpr<X, X> {
x.0
}
}
// Exposed for the macros
#[doc(hidden)]
impl From<SubExpr<X, X>> for SimpleType {
fn from(x: SubExpr<X, X>) -> SimpleType {
SimpleType(x)
}
}
// Exposed for the macros
#[doc(hidden)]
impl From<Normalized> for Typed {
fn from(x: Normalized) -> Typed {
Typed(x.0.absurd(), x.1)
}
}
impl Typed {
pub(crate) fn as_expr(&self) -> &SubExpr<X, Normalized> {
&self.0
}
pub(crate) fn into_expr(self) -> SubExpr<X, Normalized> {
self.0
}
}
impl Normalized {
pub(crate) fn as_expr(&self) -> &SubExpr<X, X> {
&self.0
}
pub(crate) fn into_expr<T>(self) -> SubExpr<X, T> {
self.0.absurd()
}
pub(crate) fn into_type(self) -> Type {
crate::expr::Type(TypeInternal::Expr(Box::new(self)))
}
}
impl SimpleType {
pub(crate) fn into_type(self) -> Type {
Normalized(self.0, Some(Type::const_type())).into_type()
}
}
|
