v9.3 (2022/03)

Platform changes

• Drop Debian-10 support
• Drop Ubuntu-16.04 support
• Drop .NET Framework 4.5.2

Dependencies Update

• Add Eigen 3.4.0.
• Add Google re2 2021-11-01.
• Protobuf 3.19.1 -> 3.19.4.
• SCIP 7.0.1 -> v800

Python

• Add pybind11.

Features

• Add PDLP as experimental
• Add MathOpt as experimental.

CP-SAT

• renamed few API for consistency
  e.g. LinearExpr.ScalProd -> LinearExpr.WeightedSum.
• Add AddAtLeastOne/AddAtMostOne/AddExactlyOne methods.
• Add AddMultiplicationConstraint(z, x, y) in all languages.
• AddMultipleCircuit() in all languages

C++

• explicit ctor IntVar(BoolVar)
• remove LinearExpr::Add*and replaced them by operator e.g. LinearExpr +=
• Add arithmetic operators on linear expression
• removed LinearExpr::BooleanSum/BooleanScalProd, use Sum/WeightedSum
• Add CpModelBuilder::FixVariable() which overwrite the domain of the variable to a single value

Java

• Rewrite LinearExpr, add a incremental builder class: LinearExpr.newBuilder().add(x).addSum(<array of variables).build()
• Follow C++ API: Circuit, MultipleCircuit, Cumulative, Reservoir, AllowedAssignment and ForbiddenAssignment now return a specialized class with incremental API to add new variables, terms, demands…

C#

• Document all methods
• Follow C++ API: Circuit, MultipleCircuit, Cumulative, Reservoir, AllowedAssignment and ForbiddenAssignment now return a specialized class with incremental API to add new variables, terms, demands…
• Add LinearExprBuilder class to build expression incrementally.

Build System

CMake

• Require at least CMake >= 3.18

Make

• Now use the CMake based build internally.