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use crate::{Result, SimpleType, StaticType, ToDhall};
#[derive(Debug, Clone, Copy)]
pub struct NoAnnot;
#[derive(Debug, Clone, Copy)]
pub struct ManualAnnot<'ty>(&'ty SimpleType);
#[derive(Debug, Clone, Copy)]
pub struct StaticAnnot;
pub trait RequiredAnnot<A> {
fn get_annot(a: &A) -> SimpleType;
}
impl<'ty, T> RequiredAnnot<ManualAnnot<'ty>> for T {
fn get_annot(a: &ManualAnnot<'ty>) -> SimpleType {
a.0.clone()
}
}
impl<T: StaticType> RequiredAnnot<StaticAnnot> for T {
fn get_annot(_: &StaticAnnot) -> SimpleType {
T::static_type()
}
}
#[derive(Debug, Clone)]
pub struct Serializer<'a, T, A> {
data: &'a T,
annot: A,
}
impl<'a, T> Serializer<'a, T, NoAnnot> {
pub fn type_annotation<'ty>(
self,
ty: &'ty SimpleType,
) -> Serializer<'a, T, ManualAnnot<'ty>> {
Serializer {
annot: ManualAnnot(ty),
data: self.data,
}
}
pub fn static_type_annotation(self) -> Serializer<'a, T, StaticAnnot> {
Serializer {
annot: StaticAnnot,
data: self.data,
}
}
}
impl<'a, T, A> Serializer<'a, T, A> {
pub fn to_string(&self) -> Result<String>
where
T: ToDhall + RequiredAnnot<A>,
{
let val = self.data.to_dhall(&T::get_annot(&self.annot))?;
Ok(val.to_string())
}
}
pub fn serialize<'a, T>(data: &'a T) -> Serializer<'a, T, NoAnnot>
where
T: ToDhall,
{
Serializer {
data,
annot: NoAnnot,
}
}
|
