From a9a6d2b20fc32f367514e90c93a12e2538ee810e Mon Sep 17 00:00:00 2001
From: Philipp Rehner <69816385+prehner@users.noreply.github.com>
Date: Fri, 13 May 2022 16:24:02 +0200
Subject: [PATCH] Fix ideal gas contribution for EquationOfState (#17)

---
 CHANGELOG.md |  4 ++++
 Cargo.lock   |  6 +++---
 Cargo.toml   |  2 +-
 README.md    |  2 +-
 src/eos.rs   | 11 +++++++++++
 5 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ae067b9e7..e824157a8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.2.1] - 2022-05-13
+### Fixed
+- Fixed a bug due to which the default ideal gas contribution was used for every equation of state. [#17](https://github.com/feos-org/feos/pull/17)
+
 ## [0.2.0] - 2022-05-10
 ### Added
 - Added [gc-PC-SAFT](https://github.com/feos-org/feos-gc-pcsaft) equation of state and Helmholtz energy functional.
diff --git a/Cargo.lock b/Cargo.lock
index 18674872c..571a1c1ff 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -135,7 +135,7 @@ checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
 
 [[package]]
 name = "feos"
-version = "0.2.0"
+version = "0.2.1"
 dependencies = [
  "feos-core",
  "feos-dft",
@@ -978,9 +978,9 @@ checksum = "a3ff2f71c82567c565ba4b3009a9350a96a7269eaa4001ebedae926230bc2254"
 
 [[package]]
 name = "syn"
-version = "1.0.93"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04066589568b72ec65f42d65a1a52436e954b168773148893c020269563decf2"
+checksum = "a07e33e919ebcd69113d5be0e4d70c5707004ff45188910106854f38b960df4a"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index b78326e3d..b500d7bf2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "feos"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Gernot Bauer <bauer@itt.uni-stuttgart.de>", "Philipp Rehner <prehner@ethz.ch>"]
 edition = "2018"
 rust-version = "1.53"
diff --git a/README.md b/README.md
index 343195290..9d6bf77e9 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ The following models are currently published as part of the `FeOs` framework
 |[`feos-pets`](https://github.com/feos-org/feos-pets)|perturbed truncated and shifted Lennard-Jones mixtures|✓|✓|
 |[`feos-uvtheory`](https://github.com/feos-org/feos-uvtheory)|equation of state for Mie fluids and mixtures|✓||
 
-The list is being expanded continuously. Currently under development are implementations of ePC-SAFT, a Helmholtz energy functional for the UV theory, SAFT-VRQ-Mie.
+The list is being expanded continuously. Currently under development are implementations of ePC-SAFT, a Helmholtz energy functional for the UV theory, and SAFT-VRQ-Mie.
 
 Other public repositories that implement models within the `FeOs` framework, but are currently not part of the `feos` Python package, are
 
diff --git a/src/eos.rs b/src/eos.rs
index ac5e1570f..e3b5bde04 100644
--- a/src/eos.rs
+++ b/src/eos.rs
@@ -75,6 +75,17 @@ impl EquationOfState for EosVariant {
             EosVariant::UVTheory(eos) => eos.residual(),
         }
     }
+
+    fn ideal_gas(&self) -> &dyn IdealGasContribution {
+        match self {
+            EosVariant::PcSaft(eos) => eos.ideal_gas(),
+            EosVariant::GcPcSaft(eos) => eos.ideal_gas(),
+            EosVariant::PengRobinson(eos) => eos.ideal_gas(),
+            EosVariant::Python(eos) => eos.ideal_gas(),
+            EosVariant::Pets(eos) => eos.ideal_gas(),
+            EosVariant::UVTheory(eos) => eos.ideal_gas(),
+        }
+    }
 }
 
 impl MolarWeight<SIUnit> for EosVariant {