Fix build pipeline

Author: Kaaserne

.github/workflows/clang.yml

@@ -1,5 +1,6 @@
 env:
   CTEST_OUTPUT_ON_FAILURE: 1
+  LIBCXX_STANDARDS_JSON: '["20","23"]'
 
 on:
   workflow_call:
@@ -30,15 +31,17 @@ jobs:
         run: sudo apt-get install -y clang-${{ matrix.version }}
 
       - name: Install libc++ Clang ${{ matrix.version }}
-        if: matrix.standard == '20'
+        if: contains(fromJson(env.LIBCXX_STANDARDS_JSON), matrix.standard)
         run: sudo apt-get install -y libc++-${{ matrix.version }}-dev libc++abi-${{ matrix.version }}-dev
 
       - name: Configure (install)
         env:
           CC: clang-${{ matrix.version }}
           CXX: clang-${{ matrix.version }}
         run: |
-          if [ "${{ matrix.standard }}" = "20" ]; then
+          sudo apt-get update && sudo apt-get install -y jq
+          STDS=$(echo '${{ env.LIBCXX_STANDARDS_JSON }}' | jq -r '.[]' | xargs)
+          if echo "$STDS" | grep -wq "${{ matrix.standard }}"; then
             CXX_FLAGS='-stdlib=libc++'
           else
             CXX_FLAGS=''

src/lz.cppm

@@ -61,7 +61,6 @@ export module lz;
 #include "Lz/interleave.hpp"
 #include "Lz/intersection.hpp"
 #include "Lz/iter_tools.hpp"
-#include "Lz/iterator_base.hpp"
 #include "Lz/join_where.hpp"
 #include "Lz/loop.hpp"
 #include "Lz/map.hpp"