WIP -- more thinking about how to work priorities into FSM

2021-09-03 17:46:52 -07:00
parent 6a567924cd
commit f2399c5384
4 changed files with 93 additions and 4 deletions
--- a/cranelift/isle/src/ast.rs
+++ b/cranelift/isle/src/ast.rs
@@ -122,6 +122,8 @@ pub enum Extern {
        func: Ident,
        /// The position of this decl.
        pos: Pos,
+        /// Whether this extractor is infallible (always matches).
+        infallible: bool,
    },
    /// An external constructor: `(constructor Term rustfunc)` form.
    Constructor {