Revert "use std::invalid_argument for bad arguments"

This reverts commit d931550db2

include/armadillo_bits/debug.hpp

@@ -165,25 +165,6 @@ arma_stop_bounds_error(const T1& x)
 
 
 
-//! print a message to get_cerr_stream() and throw invalid_argument exception
-template<typename T1>
-arma_cold
-arma_noinline
-static
-void
-arma_stop_arg_error(const T1& x)
-  {
-  #if defined(ARMA_PRINT_ERRORS)
-    {
-    get_cerr_stream() << "\nerror: " << x << std::endl;
-    }
-  #endif
-  
-  throw std::invalid_argument( std::string(x) );
-  }
-
-
-
 //! print a message to get_cerr_stream() and throw bad_alloc exception
 template<typename T1>
 arma_cold
@@ -441,16 +422,6 @@ arma_check_bounds(const bool state, const T1& x)
   }
 
 
-template<typename T1>
-arma_hot
-inline
-void
-arma_check_arg(const bool state, const T1& x)
-  {
-  if(state)  { arma_stop_arg_error(arma_str::str_wrapper(x)); }
-  }
-
-
 template<typename T1>
 arma_hot
 inline
@@ -1322,7 +1293,6 @@ arma_assert_atlas_size(const T1& A, const T2& B)
   #define arma_debug_warn                    true ? (void)0 : arma_warn
   #define arma_debug_check                   true ? (void)0 : arma_check
   #define arma_debug_check_bounds            true ? (void)0 : arma_check_bounds
-  #define arma_debug_check_arg               true ? (void)0 : arma_check_arg
   #define arma_debug_set_error               true ? (void)0 : arma_set_error
   #define arma_debug_assert_same_size        true ? (void)0 : arma_assert_same_size
   #define arma_debug_assert_mul_size         true ? (void)0 : arma_assert_mul_size
@@ -1337,7 +1307,6 @@ arma_assert_atlas_size(const T1& A, const T2& B)
   #define arma_debug_warn                  arma_warn
   #define arma_debug_check                 arma_check
   #define arma_debug_check_bounds          arma_check_bounds
-  #define arma_debug_check_arg             arma_check_arg
   #define arma_debug_set_error             arma_set_error
   #define arma_debug_assert_same_size      arma_assert_same_size
   #define arma_debug_assert_mul_size       arma_assert_mul_size