[feature/CI_setup] more CI tinkering

.github/workflows/all_push.yml

@@ -9,8 +9,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        compiler: [g++-12]
-        # compiler: [g++-12, clang++-17]
+        compiler: [g++-12, clang++-17]
         # python-version: ["3.10", "3.11", "3.12"]
         python-version: ["3.10"]
     steps:

include/__pauli_op.hpp

@@ -150,7 +150,6 @@ template <std::floating_point T> struct PauliOp {
 #pragma omp for schedule(static)
       for (size_t i = 0; i < pauli_strings.size(); ++i) {
         size_t const tid = omp_get_thread_num();
-        fmt::println("thread {}  index {}", tid, i);
 
         PauliString const &ps = pauli_strings[i];
         std::complex<T> c = coeffs[i];

include/__pauli_string.hpp

@@ -242,6 +242,7 @@ struct PauliString {
    * @brief Apply the PauliString to a batch of states. This function takes a
    * different shape of the states than the other apply functions. here all the
    * states (new and old) are transposed so their shape is (n_dims x n_states).
+   * All the new_stats are overwritten, no need to initialize.
    *
    * @tparam T The floating point base to use for all the complex numbers
    * @param new_states_T The outpus states after applying the PauliString