add downcast-rs dependency

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/Cargo.lock.example b/Cargo.lock.example
index 2dbd408ac133839e99df8207c3e1f90455f93f3b..e8ce48d1254dfcc97462631849e6b554bb3368d7 100644 (file)
--- a/Cargo.lock.example
+++ b/Cargo.lock.example
@@ -476,6 +476,12 @@ dependencies = [
  "syn 1.0.60",
 ]
 
+[[package]]
+name = "downcast-rs"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ea835d29036a4087793836fa931b08837ad5e957da9e23886b29586fb9b6650"
+
 [[package]]
 name = "either"
 version = "1.6.1"
@@ -1583,6 +1589,7 @@ dependencies = [
  "chrono-tz",
  "delegate",
  "derive_more",
+ "downcast-rs",
  "either",
  "enum-map",
  "env_logger",

diff --git a/Cargo.toml b/Cargo.toml
index c3f7c2d25d2ab2c5cccad0ccdcb6014ffdaac8b2..4848630b49f955e8a34cc982e710a9fd336756d7 100644 (file)
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,6 +26,7 @@ chrono = "0.4"
 chrono-tz = "0.5"
 delegate = "0.5"
 derive_more = "0.99"
+downcast-rs = "1"
 either = "1"
 enum-map = { version = "0.6", features = [ "serde" ] }
 env_logger = "0.8"