Add support for empty constructors for (slim)rc ptrs (#232)

* add-support-for-empty-constructors-for-(slim)RC-ptrs * add mir/interpolate/polynomial to meson

Author: 9il

meson.build

@@ -23,6 +23,7 @@ sources_list = [
  'mir/interpolate/constant',
  'mir/interpolate/linear',
  'mir/interpolate/package',
+ 'mir/interpolate/polynomial',
  'mir/interpolate/spline',
  'mir/interpolate/utility',
  'mir/math/func/expdigamma',

source/mir/rc/ptr.d

@@ -119,27 +119,6 @@ struct mir_rcptr(T)
  mir_rc_increase_counter(context);
  }
  }
-
- static if (!is(T == interface) && !__traits(isAbstractClass, T))
- {
- package(mir) this(Args...)(auto ref Args args)
- {
- () @trusted {
- _context = mir_rc_create(mir_get_type_info!T, 1, mir_get_payload_ptr!T);
- if (!_context)
- {
- version(D_Exceptions)
- throw allocationError;
- else
- assert(0, allocationExcMsg);
- }
- _value = cast(typeof(_value))(_context + 1);
- } ();
- import core.lifetime: forward;
- import mir.conv: emplace;
- cast(void) emplace!T(_value, forward!args);
- }
- }
 }
 
 ///
@@ -220,15 +199,29 @@ mir_rcptr!(immutable R) castTo(R, T)(return immutable mir_rcptr!T context) @trus
  return createRCWithContext(cast(immutable R)context._get_value, move(*cast(mir_rcptr!T*)&context));
 }
 
-
 ///
 template createRC(T)
+ if (!is(T == interface) && !__traits(isAbstractClass, T))
 {
  ///
  mir_rcptr!T createRC(Args...)(auto ref Args args)
  {
+ typeof(return) ret;
+ with (ret) () @trusted {
+ _context = mir_rc_create(mir_get_type_info!T, 1, mir_get_payload_ptr!T);
+ if (!_context)
+ {
+ version(D_Exceptions)
+ throw allocationError;
+ else
+ assert(0, allocationExcMsg);
+ }
+ _value = cast(typeof(_value))(_context + 1);
+ } ();
  import core.lifetime: forward;
- return mir_rcptr!T(forward!args);
+ import mir.conv: emplace;
+ cast(void) emplace!T(ret._value, forward!args);
+ return ret;
  }
 }
 
@@ -244,6 +237,18 @@ unittest
  assert(*a == 100);
 }
 
+/// Classes with empty constructor
+version(mir_test)
+@safe pure @nogc nothrow
+unittest
+{
+ static class C
+ {
+ int index = 34;
+ }
+ assert(createRC!C.index == 34);
+}
+
 ///
 version(mir_test)
 @safe pure @nogc nothrow
@@ -267,7 +272,6 @@ unittest
  assert(a._counter == 2);
 
  auto d = a.castTo!D; //RCPtr!D
- import std.stdio;
  assert(d._counter == 3);
  d.index = 234;
  assert(a.index == 234);

source/mir/rc/slim_ptr.d

@@ -115,40 +115,34 @@ struct mir_slim_rcptr(T)
  mir_rc_increase_counter(context);
  }
  }
-
- static if (!is(T == interface) && !__traits(isAbstractClass, T))
- {
- package(mir) this(Args...)(auto ref Args args)
- {
- () @trusted {
- auto context = mir_rc_create(mir_get_type_info!T, 1, mir_get_payload_ptr!T);
- if (!context)
- {
- version(D_Exceptions)
- throw allocationError;
- else
- assert(0, allocationExcMsg);
- }
- _value = cast(typeof(_value))(context + 1);
- } ();
- import core.lifetime: forward;
- import mir.conv: emplace;
- cast(void) emplace!T(_value, forward!args);
- }
- }
 }
 
 ///
 alias SlimRCPtr = mir_slim_rcptr;
 
 ///
 template createSlimRC(T)
+ if (!is(T == interface) && !__traits(isAbstractClass, T))
 {
  ///
  mir_slim_rcptr!T createSlimRC(Args...)(auto ref Args args)
  {
+ typeof(return) ret;
+ with (ret) () @trusted {
+ auto context = mir_rc_create(mir_get_type_info!T, 1, mir_get_payload_ptr!T);
+ if (!context)
+ {
+ version(D_Exceptions)
+ throw allocationError;
+ else
+ assert(0, allocationExcMsg);
+ }
+ _value = cast(typeof(_value))(context + 1);
+ } ();
  import core.lifetime: forward;
- return mir_slim_rcptr!T(forward!args);
+ import mir.conv: emplace;
+ cast(void) emplace!T(ret._value, forward!args);
+ return ret;
  }
 }
 
@@ -210,6 +204,18 @@ unittest
  assert(s.e == 3);
 }
 
+/// Classes with empty constructor
+version(mir_test)
+@safe pure @nogc nothrow
+unittest
+{
+ static class C
+ {
+ int index = 34;
+ }
+ assert(createSlimRC!C.index == 34);
+}
+
 version(unittest):
 
 package struct _test_unpure_system_dest_s__ {