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|
use crate::expr::*;
use crate::traits::StaticType;
#[allow(unused_imports)]
use crate::typecheck::{
type_of_const, TypeError, TypeMessage, TypecheckContext,
};
#[allow(unused_imports)]
use dhall_core::{Const, ExprF};
use std::borrow::Cow;
pub trait DynamicType {
fn get_type<'a>(&'a self) -> Result<Cow<'a, Type<'static>>, TypeError>;
}
impl<T: StaticType> DynamicType for T {
fn get_type<'a>(&'a self) -> Result<Cow<'a, Type<'static>>, TypeError> {
Ok(Cow::Owned(T::get_static_type()))
}
}
impl<'a> DynamicType for Type<'a> {
fn get_type(&self) -> Result<Cow<'_, Type<'static>>, TypeError> {
Ok(Cow::Owned(
self.clone().into_normalized()?.get_type()?.into_owned(),
))
}
}
impl<'a> DynamicType for Normalized<'a> {
fn get_type(&self) -> Result<Cow<'_, Type<'static>>, TypeError> {
match &self.1 {
Some(t) => Ok(Cow::Borrowed(t)),
None => Err(TypeError::new(
&TypecheckContext::new(),
TypeMessage::Untyped,
)),
}
}
}
impl<'a> DynamicType for Typed<'a> {
fn get_type(&self) -> Result<Cow<'_, Type<'static>>, TypeError> {
match &self.1 {
Some(t) => Ok(Cow::Borrowed(t)),
None => Err(TypeError::new(
&TypecheckContext::new(),
TypeMessage::Untyped,
)),
}
}
}
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