Fix bug in clearing previously-set keys.

Author: afranchuk

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "ergo"
-version = "1.0.0-rc.2"
+version = "1.0.0-rc.3"
 authors = ["Alex Franchuk <afranchuk@caci.com>"]
 edition = "2021"
 

ergo/Cargo.toml

@@ -1,5 +1,10 @@
 # ergo changelog
 
+## 1.0.0-rc.3  -- 2021-12-14
+* Properly remove previously-set keys when a key is set to `unset`.
+  * With the recent modification to how unset values are removed this case was
+    missed.
+
 ## 1.0.0-rc.2  -- 2021-12-13
 * Remove `Unset` keyed arguments to commands just like they are removed from
   maps.

ergo/ChangeLog.md

@@ -94,3 +94,4 @@ scripts reside.
 * Maybe don't have a fallback doc string if there is no documentation set.
 * Progress spinner
 * Improve sources of capture bindings.
+* `std:Iter:partition`

ergo/README.md

@@ -1,6 +1,6 @@
 [package]
 name = "ergo_runtime"
-version = "1.0.0-rc.2"
+version = "1.0.0-rc.3"
 authors = ["Alex Franchuk <afranchuk@caci.com>"]
 edition = "2021"
 

ergo_runtime/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ergo_runtime_macro"
-version = "1.0.0-rc.2"
+version = "1.0.0-rc.3"
 authors = ["Alex Franchuk <afranchuk@caci.com>"]
 edition = "2021"
 

ergo_runtime_macro/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ergo_script"
-version = "1.0.0-rc.2"
+version = "1.0.0-rc.3"
 authors = ["Alex Franchuk <afranchuk@caci.com>"]
 edition = "2021"
 

ergo_script/Cargo.toml

@@ -481,6 +481,8 @@ impl Evaluator {
 
                         if !v.is_type::<types::Unset>() {
                             env.insert(k, v.clone());
+                        } else {
+                            env.remove(&k);
                         }
                         if let Some(cap) = cap {
                             captures.resolve(cap, v);

ergo_script/src/eval.rs

@@ -475,6 +475,16 @@ mod test {
         )
     }
 
+    #[test]
+    fn set_and_unset() -> Result<(), String> {
+        script_eval_to("{a = 1, a = :unset}", SRMap(&[]))
+    }
+
+    #[test]
+    fn merge_and_unset() -> Result<(), String> {
+        script_eval_to("m = {a = 1}, {^:m, a = :unset}", SRMap(&[]))
+    }
+
     #[test]
     fn forced_function_capture() -> Result<(), String> {
         script_eval_to("b = {a = 1}; f = !(fn :x -> b::x); f a", SRString("1"))

ergo_script/src/lib.rs

@@ -1,6 +1,6 @@
 [package]
 name = "ergo_std"
-version = "1.0.0-rc.2"
+version = "1.0.0-rc.3"
 authors = ["Alex Franchuk <afranchuk@caci.com>"]
 edition = "2021"
 

ergo_std/Cargo.toml

@@ -1,5 +1,8 @@
 # ergo_std changelog
 
+## 1.0.0-rc.3  -- 2021-12-14
+* No changes.
+
 ## 1.0.0-rc.2  -- 2021-12-13
 * Add `std:io:is-terminal` to check whether a stream is connected to a terminal.
 * Add `std:fs:file-type` to get the file type of a path.