Introduce chomp as a procedural macro.

Add a bunch of tests.

Fix chomp and chewed so autochomp compiles.

1 files changed, 42 insertions, 0 deletions

diff --git a/chomp-macro/src/lib.rs b/chomp-macro/src/lib.rs
new file mode 100644
index 0000000..d58bbdc
--- /dev/null
+++ b/chomp-macro/src/lib.rs
@@ -0,0 +1,42 @@
+use chomp::{
+    chomp::{
+        check::{InlineCalls, TypeCheck},
+        context::Context,
+        visit::Visitable,
+    },
+    lower::{rust::RustBackend, Backend, GenerateCode},
+    nibble::cst::File,
+};
+use proc_macro::{Span, TokenStream};
+use syn::Error;
+
+#[proc_macro]
+pub fn nibble(item: TokenStream) -> TokenStream {
+    syn::parse(item)
+        .and_then(|nibble: File| {
+            nibble
+                .convert()
+                .ok_or_else(|| todo!())
+        })
+        .and_then(|(funs, goal)| {
+            funs.into_iter()
+                .try_rfold(goal, |goal, function| {
+                    goal.fold(&mut InlineCalls::new(function))
+                })
+                .map_err(Error::from)
+        })
+        .and_then(|expr| {
+            let mut context = Context::default();
+            expr.fold(&mut TypeCheck {
+                context: &mut context,
+            })
+            .map_err(Error::from)
+        })
+        .map(|typed| {
+            let mut backend = RustBackend::default();
+            let id = typed.gen(&mut backend);
+            backend.emit_code(id)
+        })
+        .unwrap_or_else(Error::into_compile_error)
+        .into()
+}