Merge pull request #332 from ds4dm/fix-missing-include

Add missing optional include

Author: AntoinePrv

.pre-commit-config.yaml

@@ -5,7 +5,7 @@ default_language_version:
 
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v3.2.0
+    rev: v4.2.0
     hooks:
       - id: trailing-whitespace
       - id: end-of-file-fixer
@@ -20,17 +20,17 @@ repos:
       - id: clang-tidy
         args: [--fix, --fix-errors]
   - repo: https://github.com/psf/black
-    rev: 21.7b0
+    rev: 22.3.0
     hooks:
       - id: black
   - repo: https://github.com/asottile/blacken-docs
-    rev: v1.10.0
+    rev: v1.12.1
     hooks:
     - id: blacken-docs
       args: [ '--line-length', '100' ]
       additional_dependencies: [black==21.7b0]
   - repo: https://github.com/Lucas-C/pre-commit-hooks
-    rev: v1.1.9
+    rev: v1.1.13
     hooks:
     - id: forbid-crlf
     - id: remove-crlf

VERSION

@@ -2,7 +2,7 @@
 # The following should include only numbers
 VERSION_MAJOR 0
 VERSION_MINOR 8
-VERSION_PATCH 0
+VERSION_PATCH 1
 # The following should include their whole string and can be combined.
 # They must be numbered, starting from 0.
 VERSION_PRE          # Pre release without leading dot, e.g. `a0` (alpha), `b0` (beta), or `rc0` (release candidate)

libecole/include/ecole/dynamics/branching.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cstddef>
+#include <optional>
 
 #include <xtensor/xtensor.hpp>