implement `forEach()`

src/base.cc

@@ -7,6 +7,7 @@
 #include "base.hh"
 #include "mat.hh"
 #include "subview_mat.hh"
+#include "mapval.hh"
 #include "stream_utils.hh"
 
 #include <armadillo>
@@ -73,7 +74,24 @@ namespace php_arma
     template <typename T, typename T1>
     PHP_ARMA_METHOD(base, forEach, T, T1)
     {
-        
+        zend_fcall_info       fci;
+        zend_fcall_info_cache fcc;
+        ZEND_PARSE_PARAMETERS_START(1, 1)
+            Z_PARAM_FUNC(fci, fcc);
+        ZEND_PARSE_PARAMETERS_END();
+
+        zval params[1], retval;
+        fci.param_count = 1;
+        fci.params = params;
+        fci.retval = &retval;
+
+        auto native = THIS_NATIVE;
+        native->for_each([&fci, &fcc](T& val) {
+            ZVAL_OBJ(&fci.params[0], mapval_dense<T>::create(&val));
+            zend_call_function(&fci, &fcc);
+            zval_ptr_dtor(&fci.params[0]);
+            zval_ptr_dtor(fci.retval);
+        });
     }
 
     template <typename T, typename T1>

tests/013-foreach.phpt

@@ -0,0 +1,29 @@
+--TEST--
+Test for method `forEach()`.
+--SKIPIF--
+<?php
+require_once 'includes/loaded.php';
+is_php_arma_loaded();
+?>
+--FILE--
+<?php
+
+require_once 'includes/assert.php';
+
+$mat = Arma\IMat::fromString('1 2; 3 4');
+$mat->rawPrint();
+$mat->forEach(function (Arma\MapVal $elem) {
+    $elem_val = $elem->val();
+    echo $elem_val;
+    $elem->setTo($elem_val + 4);
+});
+echo PHP_EOL;
+$mat->rawPrint();
+
+?>
+--EXPECT--
+1 2
+3 4
+1324
+5 6
+7 8