Fix include error

CMakeLists.txt

@@ -3,7 +3,7 @@ project(PSLP LANGUAGES C CXX) # The library is written in C, but we also have so
 
 set(PSLP_VERSION_MAJOR 0)
 set(PSLP_VERSION_MINOR 0)
-set(PSLP_VERSION_PATCH 5)
+set(PSLP_VERSION_PATCH 6)
 set(PSLP_VERSION "${PSLP_VERSION_MAJOR}.${PSLP_VERSION_MINOR}.${PSLP_VERSION_PATCH}")
 add_compile_definitions(PSLP_VERSION="${PSLP_VERSION}")
 

include/PSLP/PSLP_API.h

@@ -126,7 +126,7 @@ extern "C"
 
     /* Postsolve the problem given the primal-dual solution (x, y, z) of the
        reduced problem. The function populates presolver->sol, so if you're
-       looking for the solution to the original problem, you should look there.
+       looking for the solution to the original problem, you want to look there.
        If the solver has added the offset to the objective when solving the reduced
        problem, the optimal value of the original problem is the same as that of
        the reduced problem. */

include/PSLP/PSLP_sol.h

@@ -20,12 +20,13 @@
 #define PSLP_SOL_H
 
 #ifdef __cplusplus
+#include <cstddef> // size_t
 extern "C"
 {
+#else
+#include <stddef.h> // size_t
 #endif
 
-#include <stddef.h>
-
     typedef struct Solution
     {
         double *x;

include/PSLP/PSLP_stats.h

@@ -19,32 +19,44 @@
 #ifndef PSLP_STATS_H
 #define PSLP_STATS_H
 
-typedef struct PresolveStats
+#ifdef __cplusplus
+#include <cstddef> // size_t
+extern "C"
 {
-    size_t n_rows_original;
-    size_t n_cols_original;
-    size_t nnz_original;
-    size_t n_rows_reduced;
-    size_t n_cols_reduced;
-    size_t nnz_reduced;
-
-    /* reduction stats */
-    size_t nnz_removed_trivial;
-    size_t nnz_removed_fast;
-    size_t nnz_removed_primal_propagation;
-    size_t nnz_removed_parallel_rows;
-    size_t nnz_removed_parallel_cols;
-
-    /* time stats */
-    double time_init;
-    double time_fast_reductions;
-    double time_medium_reductions;
-    double time_primal_propagation;
-    double time_parallel_rows;
-    double time_parallel_cols;
-    double time_presolve;
-    double time_postsolve;
-
-} PresolveStats;
+#else
+#include <stddef.h> // size_t
+#endif
+
+    typedef struct PresolveStats
+    {
+        size_t n_rows_original;
+        size_t n_cols_original;
+        size_t nnz_original;
+        size_t n_rows_reduced;
+        size_t n_cols_reduced;
+        size_t nnz_reduced;
+
+        /* reduction stats */
+        size_t nnz_removed_trivial;
+        size_t nnz_removed_fast;
+        size_t nnz_removed_primal_propagation;
+        size_t nnz_removed_parallel_rows;
+        size_t nnz_removed_parallel_cols;
+
+        /* time stats */
+        double time_init;
+        double time_fast_reductions;
+        double time_medium_reductions;
+        double time_primal_propagation;
+        double time_parallel_rows;
+        double time_parallel_cols;
+        double time_presolve;
+        double time_postsolve;
+
+    } PresolveStats;
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif // PSLP_STATS_H