From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 27 Feb 2021 11:18:53 +0000 (+0000)
Subject: Provide PosC::try_map
X-Git-Tag: otter-0.4.0~322
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=4d69763061be0df292296f68a021bb9aa24e5157;p=otter.git

Provide PosC::try_map

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

diff --git a/src/spec.rs b/src/spec.rs
index 5efe3f70..89f3e18d 100644
--- a/src/spec.rs
+++ b/src/spec.rs
@@ -309,6 +309,16 @@ pub mod pos_traits {
     }
   }
 
+  impl<T:Copy+Clone+Debug> PosC<T> {
+    pub fn try_map<E:Debug, U:Copy+Clone+Debug, F: FnMut(T) -> Result<U,E>>
+      (self, f: F) -> Result<PosC<U>,E>
+    {
+      PosC::try_from_iter_2(
+        self.0.iter().cloned().map(f)
+      )
+    }
+  }
+
   impl PosC<Coord> {
     pub fn promote(&self) -> PosC<f64> { self.map(|v| v as f64) }
   }