From 220733b974cffae988afef559b6e860aa9477c83 Mon Sep 17 00:00:00 2001
From: Pat Hickey <pat@moreproductive.org>
Date: Tue, 2 Jun 2020 18:41:53 -0700
Subject: [PATCH] wiggle-generate: add an `empty` constructor to ErrorTransform

some library users (me, in lucet-wasi) may not care about ErrorTransform YET
---
 crates/wiggle/generate/src/error_transform.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/crates/wiggle/generate/src/error_transform.rs b/crates/wiggle/generate/src/error_transform.rs
index 80cb56f925..3598e221de 100644
--- a/crates/wiggle/generate/src/error_transform.rs
+++ b/crates/wiggle/generate/src/error_transform.rs
@@ -11,6 +11,9 @@ pub struct ErrorTransform {
 }
 
 impl ErrorTransform {
+    pub fn empty() -> Self {
+        Self { m: Vec::new() }
+    }
     pub fn new(conf: &ErrorConf, doc: &Document) -> Result<Self, Error> {
         let mut richtype_identifiers = HashMap::new();
         let m = conf.iter().map(|(ident, field)|