codegen

analysis/src/ctxt.rs

@@ -12,7 +12,7 @@ use crate::{
 };
 
 #[derive(Debug)]
-pub(crate) struct LoweringCx<'cx> {
+pub struct LoweringCx<'cx> {
     tys: RefCell<FxHashSet<&'cx TyKind<'cx>>>,
     layouts: RefCell<FxHashSet<&'cx Layout>>,
     string_literals: RefCell<FxHashMap<&'cx [u8], DefId>>,
@@ -23,7 +23,7 @@ pub(crate) struct LoweringCx<'cx> {
 }
 
 impl<'cx> LoweringCx<'cx> {
-    pub(crate) fn new(arena: &'cx bumpalo::Bump) -> Self {
+    pub fn new(arena: &'cx bumpalo::Bump) -> Self {
         LoweringCx {
             tys: RefCell::default(),
             layouts: RefCell::default(),

analysis/src/lib.rs

@@ -2,17 +2,18 @@
 #![warn(rust_2018_idioms)]
 
 mod ctxt;
-mod ir;
+pub mod ir;
 mod lower;
-mod ty;
+pub mod ty;
 
+pub use ctxt::LoweringCx;
 pub use lower::lower_translation_unit;
 use parser::Span;
 
 #[derive(Debug)]
 pub struct Error {
     msg: String,
-    span: Span,
+    span: Option<Span>,
     notes: Vec<Note>,
 }
 
@@ -26,7 +27,15 @@ impl Error {
     pub fn new(msg: impl Into<String>, span: Span) -> Self {
         Self {
             msg: msg.into(),
-            span,
+            span: Some(span),
+            notes: Vec::new(),
+        }
+    }
+
+    pub fn new_without_span(msg: impl Into<String>) -> Self {
+        Self {
+            msg: msg.into(),
+            span: None,
             notes: Vec::new(),
         }
     }

analysis/src/lower.rs

@@ -21,11 +21,9 @@ use crate::{
 type Result<T, E = Error> = std::result::Result<T, E>;
 
 pub fn lower_translation_unit<'cx>(
-    arena: &'cx bumpalo::Bump,
+    lcx: &mut LoweringCx<'cx>,
     ast: &ast::TranslationUnit,
 ) -> Result<Ir<'cx>, Error> {
-    let mut lcx = LoweringCx::new(arena);
-
     let mut ir = Ir {
         funcs: FxHashMap::default(),
     };