create synthetic AST nodes to enable looking up Rust fixed-size types

Author: fw-immunant

c2rust-transpile/src/c_ast/conversion.rs

@@ -437,6 +437,14 @@ impl ConversionContext {
             self.typed_context.comments.push(comment);
         }
 
+        // Add Rust fixed-size types.
+        for rust_type_kind in CTypeKind::PULLBACK_KINDS {
+            let new_id = self.id_mapper.fresh_id();
+            self.add_type(new_id, not_located(rust_type_kind));
+            self.processed_nodes
+                .insert(new_id, self::node_types::OTHER_TYPE);
+        }
+
         // Continue popping Clang nodes off of the stack of nodes we have promised to visit
         while let Some((node_id, expected_ty)) = self.visit_as.pop() {
             // Check if we've already processed this node. If so, ascertain that it has the right

c2rust-transpile/src/c_ast/mod.rs

@@ -464,6 +464,12 @@ impl TypedAstContext {
         ty.map(|ty| (expr_id, ty))
     }
 
+    pub fn type_for_kind(&self, kind: CTypeKind) -> Option<CTypeId> {
+        self.c_types
+            .iter()
+            .find_map(|(id, k)| if kind == k.kind { Some(*id) } else { None })
+    }
+
     pub fn resolve_type_id(&self, typ: CTypeId) -> CTypeId {
         use CTypeKind::*;
         let ty = match self.index(typ).kind {