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cpp-libs
Actor Framework
Commits
605b9f29
Commit
605b9f29
authored
Aug 07, 2023
by
Shariar Azad Riday
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Add ignore elements flow operator
parent
27b781cd
Changes
7
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7 changed files
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166 additions
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+166
-0
libcaf_core/CMakeLists.txt
libcaf_core/CMakeLists.txt
+1
-0
libcaf_core/caf/flow/observable.hpp
libcaf_core/caf/flow/observable.hpp
+10
-0
libcaf_core/caf/flow/observable_decl.hpp
libcaf_core/caf/flow/observable_decl.hpp
+3
-0
libcaf_core/caf/flow/step/all.hpp
libcaf_core/caf/flow/step/all.hpp
+1
-0
libcaf_core/caf/flow/step/fwd.hpp
libcaf_core/caf/flow/step/fwd.hpp
+3
-0
libcaf_core/caf/flow/step/ignore_elements.hpp
libcaf_core/caf/flow/step/ignore_elements.hpp
+46
-0
libcaf_core/caf/flow/step/ignore_elements.test.cpp
libcaf_core/caf/flow/step/ignore_elements.test.cpp
+102
-0
No files found.
libcaf_core/CMakeLists.txt
View file @
605b9f29
...
...
@@ -153,6 +153,7 @@ caf_add_component(
caf/flow/observable_builder.cpp
caf/flow/op/interval.cpp
caf/flow/scoped_coordinator.cpp
caf/flow/step/ignore_elements.test.cpp
caf/flow/step/skip_last.test.cpp
caf/flow/step/take_last.test.cpp
caf/flow/subscription.cpp
...
...
libcaf_core/caf/flow/observable.hpp
View file @
605b9f29
...
...
@@ -213,6 +213,11 @@ public:
return
fn
(
std
::
move
(
*
this
));
}
/// @copydoc observable::ignore_elements
auto
ignore_elements
()
&&
{
return
add_step
(
step
::
ignore_elements
<
output_type
>
{});
}
/// @copydoc observable::skip
auto
skip
(
size_t
n
)
&&
{
return
add_step
(
step
::
skip
<
output_type
>
{
n
});
...
...
@@ -588,6 +593,11 @@ observable<T>::reduce(Init init, Reducer reducer) {
return
transform
(
step
::
reduce
<
Reducer
>
{
std
::
move
(
init
),
std
::
move
(
reducer
)});
}
template
<
class
T
>
transformation
<
step
::
ignore_elements
<
T
>>
observable
<
T
>::
ignore_elements
()
{
return
transform
(
step
::
ignore_elements
<
T
>
{});
}
template
<
class
T
>
transformation
<
step
::
skip
<
T
>>
observable
<
T
>::
skip
(
size_t
n
)
{
return
transform
(
step
::
skip
<
T
>
{
n
});
...
...
libcaf_core/caf/flow/observable_decl.hpp
View file @
605b9f29
...
...
@@ -100,6 +100,9 @@ public:
template
<
class
Predicate
>
transformation
<
step
::
filter
<
Predicate
>>
filter
(
Predicate
prediate
);
/// Returns a transformation that ignores all items and only forwards complete
transformation
<
step
::
ignore_elements
<
T
>>
ignore_elements
();
/// Returns a transformation that applies `f` to each input and emits the
/// result of the function application.
template
<
class
F
>
...
...
libcaf_core/caf/flow/step/all.hpp
View file @
605b9f29
...
...
@@ -4,6 +4,7 @@
#include "caf/flow/step/do_on_error.hpp"
#include "caf/flow/step/do_on_next.hpp"
#include "caf/flow/step/filter.hpp"
#include "caf/flow/step/ignore_elements.hpp"
#include "caf/flow/step/map.hpp"
#include "caf/flow/step/on_error_complete.hpp"
#include "caf/flow/step/reduce.hpp"
...
...
libcaf_core/caf/flow/step/fwd.hpp
View file @
605b9f29
...
...
@@ -18,6 +18,9 @@ class do_on_next;
template
<
class
>
class
filter
;
template
<
class
>
class
ignore_elements
;
template
<
class
>
class
map
;
...
...
libcaf_core/caf/flow/step/ignore_elements.hpp
0 → 100644
View file @
605b9f29
// This file is part of CAF, the C++ Actor Framework. See the file LICENSE in
// the main distribution directory for license terms and copyright or visit
// https://github.com/actor-framework/actor-framework/blob/master/LICENSE.
#pragma once
#include "caf/detail/ring_buffer.hpp"
#include "caf/fwd.hpp"
#include <cstddef>
namespace
caf
::
flow
::
step
{
template
<
class
T
>
class
ignore_elements
{
public:
using
input_type
=
T
;
using
output_type
=
T
;
explicit
ignore_elements
()
{
// nop
}
ignore_elements
(
ignore_elements
&&
)
=
default
;
ignore_elements
(
const
ignore_elements
&
)
=
default
;
ignore_elements
&
operator
=
(
ignore_elements
&&
)
=
default
;
ignore_elements
&
operator
=
(
const
ignore_elements
&
)
=
default
;
template
<
class
Next
,
class
...
Steps
>
bool
on_next
(
const
input_type
&
item
,
Next
&
next
,
Steps
&
...
steps
)
{
return
true
;
}
template
<
class
Next
,
class
...
Steps
>
void
on_complete
(
Next
&
next
,
Steps
&
...
steps
)
{
next
.
on_complete
(
steps
...);
}
template
<
class
Next
,
class
...
Steps
>
void
on_error
(
const
error
&
what
,
Next
&
next
,
Steps
&
...
steps
)
{
next
.
on_error
(
what
,
steps
...);
}
};
}
// namespace caf::flow::step
libcaf_core/caf/flow/step/ignore_elements.test.cpp
0 → 100644
View file @
605b9f29
// This file is part of CAF, the C++ Actor Framework. See the file LICENSE in
// the main distribution directory for license terms and copyright or visit
// https://github.com/actor-framework/actor-framework/blob/master/LICENSE.
#include "caf/flow/step/ignore_elements.hpp"
#include "caf/test/caf_test_main.hpp"
#include "caf/test/test.hpp"
#include "caf/flow/scoped_coordinator.hpp"
#include "caf/scheduled_actor/flow.hpp"
#include <vector>
using
namespace
caf
;
using
caf
::
flow
::
make_observer
;
struct
fixture
{
flow
::
scoped_coordinator_ptr
ctx
=
flow
::
make_scoped_coordinator
();
template
<
class
...
Ts
>
static
auto
ls
(
Ts
...
xs
)
{
return
std
::
vector
<
int
>
{
xs
...};
}
};
WITH_FIXTURE
(
fixture
)
{
TEST
(
"calling take(5) after ignore_elements on range(1, 10) produces []"
)
{
auto
result
=
std
::
vector
<
int
>
{};
SECTION
(
"blueprint"
)
{
ctx
->
make_observable
().
range
(
1
,
10
).
ignore_elements
().
take
(
5
).
for_each
(
[
&
](
const
int
&
result_observable
)
{
result
.
emplace_back
(
result_observable
);
});
}
SECTION
(
"observable"
)
{
ctx
->
make_observable
()
.
range
(
1
,
10
)
.
as_observable
()
.
ignore_elements
()
.
take
(
5
)
.
for_each
([
&
](
const
int
&
result_observable
)
{
result
.
emplace_back
(
result_observable
);
});
}
ctx
->
run
();
check_eq
(
result
.
size
(),
0u
);
}
TEST
(
"calling ignore_elements on range(1, 10) produces []"
)
{
auto
result
=
std
::
vector
<
int
>
{};
SECTION
(
"blueprint"
)
{
ctx
->
make_observable
().
range
(
1
,
10
).
ignore_elements
().
for_each
(
[
&
](
const
int
&
result_observable
)
{
result
.
emplace_back
(
result_observable
);
});
}
SECTION
(
"observable"
)
{
ctx
->
make_observable
()
.
range
(
1
,
10
)
.
as_observable
()
.
ignore_elements
()
.
for_each
([
&
](
const
int
&
result_observable
)
{
result
.
emplace_back
(
result_observable
);
});
}
ctx
->
run
();
check_eq
(
result
.
size
(),
0u
);
}
TEST
(
"ignore_elements operator forwards errors"
)
{
caf
::
error
result
;
auto
outputs
=
std
::
vector
<
int
>
{};
SECTION
(
"blueprint"
)
{
ctx
->
make_observable
()
.
fail
<
int
>
(
make_error
(
sec
::
runtime_error
))
.
ignore_elements
()
.
do_on_error
([
&
result
](
const
error
&
err
)
{
result
=
err
;
})
.
for_each
([
&
](
const
int
&
result_observable
)
{
outputs
.
emplace_back
(
result_observable
);
});
}
SECTION
(
"observable"
)
{
ctx
->
make_observable
()
.
fail
<
int
>
(
make_error
(
sec
::
runtime_error
))
.
as_observable
()
.
ignore_elements
()
.
do_on_error
([
&
result
](
const
error
&
err
)
{
result
=
err
;
})
.
for_each
([
&
](
const
int
&
result_observable
)
{
outputs
.
emplace_back
(
result_observable
);
});
}
ctx
->
run
();
check_eq
(
result
,
caf
::
sec
::
runtime_error
);
check_eq
(
outputs
.
size
(),
0u
);
}
}
// WITH_FIXTURE(fixture)
CAF_TEST_MAIN
()
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