Remove dhall::expr!() macro

It's a lot of hassle for not a lot of benefit

2 files changed, 0 insertions, 234 deletions

diff --git a/dhall_proc_macros/src/lib.rs b/dhall_proc_macros/src/lib.rs
index e4aa8b5..5304429 100644
--- a/dhall_proc_macros/src/lib.rs
+++ b/dhall_proc_macros/src/lib.rs
@@ -6,20 +6,9 @@
 extern crate proc_macro;
 
 mod derive;
-mod quote;
 
 use proc_macro::TokenStream;
 
-#[proc_macro]
-pub fn expr(input: TokenStream) -> TokenStream {
-    quote::expr(input)
-}
-
-#[proc_macro]
-pub fn subexpr(input: TokenStream) -> TokenStream {
-    quote::subexpr(input)
-}
-
 #[proc_macro_derive(StaticType)]
 pub fn derive_static_type(input: TokenStream) -> TokenStream {
     derive::derive_static_type(input)
diff --git a/dhall_proc_macros/src/quote.rs b/dhall_proc_macros/src/quote.rs
deleted file mode 100644
index 3dbfba9..0000000
--- a/dhall_proc_macros/src/quote.rs
+++ /dev/null
@@ -1,223 +0,0 @@
-extern crate proc_macro;
-use dhall_syntax::context::Context;
-use dhall_syntax::*;
-use proc_macro2::TokenStream;
-use quote::quote;
-
-pub fn expr(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
-    let input_str = input.to_string();
-    let expr: SubExpr<_, Import> = parse_expr(&input_str).unwrap();
-    let no_import =
-        |_: &Import| -> X { panic!("Don't use import in dhall::expr!()") };
-    let expr = expr.map_embed(no_import);
-    let output = quote_expr(expr.as_ref(), &Context::new());
-    output.into()
-}
-
-pub fn subexpr(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
-    let input_str = input.to_string();
-    let expr: SubExpr<_, Import> = parse_expr(&input_str).unwrap();
-    let no_import =
-        |_: &Import| -> X { panic!("Don't use import in dhall::subexpr!()") };
-    let expr = expr.map_embed(no_import);
-    let output = quote_subexpr(&expr, &Context::new());
-    output.into()
-}
-
-// Returns an expression of type ExprF<T, _>, where T is the
-// type of the subexpressions after interpolation.
-pub fn quote_exprf<TS>(expr: ExprF<TS, X>) -> TokenStream
-where
-    TS: quote::ToTokens + std::fmt::Debug,
-{
-    use dhall_syntax::ExprF::*;
-    match expr {
-        Var(_) => unreachable!(),
-        Pi(x, t, b) => {
-            let x = quote_label(&x);
-            quote! { dhall_syntax::ExprF::Pi(#x, #t, #b) }
-        }
-        Lam(x, t, b) => {
-            let x = quote_label(&x);
-            quote! { dhall_syntax::ExprF::Lam(#x, #t, #b) }
-        }
-        App(f, a) => {
-            quote! { dhall_syntax::ExprF::App(#f, #a) }
-        }
-        Annot(x, t) => {
-            quote! { dhall_syntax::ExprF::Annot(#x, #t) }
-        }
-        Const(c) => {
-            let c = quote_const(c);
-            quote! { dhall_syntax::ExprF::Const(#c) }
-        }
-        Builtin(b) => {
-            let b = quote_builtin(b);
-            quote! { dhall_syntax::ExprF::Builtin(#b) }
-        }
-        BinOp(o, a, b) => {
-            let o = quote_binop(o);
-            quote! { dhall_syntax::ExprF::BinOp(#o, #a, #b) }
-        }
-        NaturalLit(n) => {
-            quote! { dhall_syntax::ExprF::NaturalLit(#n) }
-        }
-        BoolLit(b) => {
-            quote! { dhall_syntax::ExprF::BoolLit(#b) }
-        }
-        SomeLit(x) => {
-            quote! { dhall_syntax::ExprF::SomeLit(#x) }
-        }
-        EmptyListLit(t) => {
-            quote! { dhall_syntax::ExprF::EmptyListLit(#t) }
-        }
-        NEListLit(es) => {
-            let es = quote_vec(es);
-            quote! { dhall_syntax::ExprF::NEListLit(#es) }
-        }
-        RecordType(m) => {
-            let m = quote_map(m);
-            quote! { dhall_syntax::ExprF::RecordType(#m) }
-        }
-        RecordLit(m) => {
-            let m = quote_map(m);
-            quote! { dhall_syntax::ExprF::RecordLit(#m) }
-        }
-        UnionType(m) => {
-            let m = quote_opt_map(m);
-            quote! { dhall_syntax::ExprF::UnionType(#m) }
-        }
-        e => unimplemented!("{:?}", e),
-    }
-}
-
-// Returns an expression of type SubExpr<_, _>. Expects interpolated variables
-// to be of type SubExpr<_, _>.
-fn quote_subexpr<N>(
-    expr: &SubExpr<N, X>,
-    ctx: &Context<Label, ()>,
-) -> TokenStream {
-    use dhall_syntax::ExprF::*;
-    match expr.as_ref().map_ref_with_special_handling_of_binders(
-        |e| quote_subexpr(e, ctx),
-        |l, e| quote_subexpr(e, &ctx.insert(l.clone(), ())),
-        |_| unreachable!(),
-    ) {
-        Var(V(ref s, n)) => {
-            match ctx.lookup(s, n) {
-                // Non-free variable; interpolates as itself
-                Some(()) => {
-                    let s: String = s.into();
-                    let var = quote! { dhall_syntax::V(#s.into(), #n) };
-                    rc(quote! { dhall_syntax::ExprF::Var(#var) })
-                }
-                // Free variable; interpolates as a rust variable
-                None => {
-                    let s: String = s.into();
-                    // TODO: insert appropriate shifts ?
-                    let v: TokenStream = s.parse().unwrap();
-                    quote! { {
-                        let x: dhall_syntax::SubExpr<_, _> = #v.clone();
-                        x
-                    } }
-                }
-            }
-        }
-        e => rc(quote_exprf(e)),
-    }
-}
-
-// Returns an expression of type Expr<_, _>. Expects interpolated variables
-// to be of type SubExpr<_, _>.
-fn quote_expr<N>(expr: &Expr<N, X>, ctx: &Context<Label, ()>) -> TokenStream {
-    use dhall_syntax::ExprF::*;
-    match expr.map_ref_with_special_handling_of_binders(
-        |e| quote_subexpr(e, ctx),
-        |l, e| quote_subexpr(e, &ctx.insert(l.clone(), ())),
-        |_| unreachable!(),
-    ) {
-        Var(V(ref s, n)) => {
-            match ctx.lookup(s, n) {
-                // Non-free variable; interpolates as itself
-                Some(()) => {
-                    let s: String = s.into();
-                    let var = quote! { dhall_syntax::V(#s.into(), #n) };
-                    quote! { dhall_syntax::ExprF::Var(#var) }
-                }
-                // Free variable; interpolates as a rust variable
-                None => {
-                    let s: String = s.into();
-                    // TODO: insert appropriate shifts ?
-                    let v: TokenStream = s.parse().unwrap();
-                    quote! { {
-                        let x: dhall_syntax::SubExpr<_, _> = #v.clone();
-                        x.unroll()
-                    } }
-                }
-            }
-        }
-        e => quote_exprf(e),
-    }
-}
-
-fn quote_builtin(b: Builtin) -> TokenStream {
-    format!("::dhall_syntax::Builtin::{:?}", b).parse().unwrap()
-}
-
-fn quote_const(c: Const) -> TokenStream {
-    format!("::dhall_syntax::Const::{:?}", c).parse().unwrap()
-}
-
-fn quote_binop(b: BinOp) -> TokenStream {
-    format!("::dhall_syntax::BinOp::{:?}", b).parse().unwrap()
-}
-
-fn quote_label(l: &Label) -> TokenStream {
-    let l = String::from(l);
-    quote! { dhall_syntax::Label::from(#l) }
-}
-
-fn rc(x: TokenStream) -> TokenStream {
-    quote! { ::dhall_syntax::rc(#x) }
-}
-
-fn quote_opt<TS>(x: Option<TS>) -> TokenStream
-where
-    TS: quote::ToTokens + std::fmt::Debug,
-{
-    match x {
-        Some(x) => quote!(Some(#x)),
-        None => quote!(None),
-    }
-}
-
-fn quote_vec<TS>(e: Vec<TS>) -> TokenStream
-where
-    TS: quote::ToTokens + std::fmt::Debug,
-{
-    quote! { vec![ #(#e),* ] }
-}
-
-fn quote_map<TS>(m: impl IntoIterator<Item = (Label, TS)>) -> TokenStream
-where
-    TS: quote::ToTokens + std::fmt::Debug,
-{
-    let entries = m.into_iter().map(|(k, v)| {
-        let k = quote_label(&k);
-        quote!(m.insert(#k, #v);)
-    });
-    quote! { {
-        let mut m = ::dhall_syntax::map::DupTreeMap::new();
-        #( #entries )*
-        m
-    } }
-}
-
-fn quote_opt_map<TS>(
-    m: impl IntoIterator<Item = (Label, Option<TS>)>,
-) -> TokenStream
-where
-    TS: quote::ToTokens + std::fmt::Debug,
-{
-    quote_map(m.into_iter().map(|(k, v)| (k, quote_opt(v))))
-}