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Third Party Harfbuzz
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70a49f2e
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Third Party Harfbuzz
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体验新版 GitCode,发现更多精彩内容 >>
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70a49f2e
编写于
5月 09, 2019
作者:
B
Behdad Esfahbod
浏览文件
操作
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电子邮件补丁
差异文件
[meta] Add hb_conditional<> and hb_is_convertible()
上级
5e3cbed0
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
121 addition
and
11 deletion
+121
-11
src/Makefile.am
src/Makefile.am
+5
-1
src/hb-meta.hh
src/hb-meta.hh
+46
-10
src/test-meta.cc
src/test-meta.cc
+70
-0
未找到文件。
src/Makefile.am
浏览文件 @
70a49f2e
...
...
@@ -384,7 +384,7 @@ dump_use_data_SOURCES = dump-use-data.cc hb-ot-shape-complex-use-table.cc
dump_use_data_CPPFLAGS
=
$(HBCFLAGS)
dump_use_data_LDADD
=
libharfbuzz.la
$(HBLIBS)
COMPILED_TESTS
=
test-algs test-iter test-ot-tag test-unicode-ranges
COMPILED_TESTS
=
test-algs test-iter test-
meta test-
ot-tag test-unicode-ranges
COMPILED_TESTS_CPPFLAGS
=
$(HBCFLAGS)
-DMAIN
-UNDEBUG
COMPILED_TESTS_LDADD
=
libharfbuzz.la
$(HBLIBS)
check_PROGRAMS
+=
$(COMPILED_TESTS)
...
...
@@ -398,6 +398,10 @@ test_iter_SOURCES = test-iter.cc hb-static.cc
test_iter_CPPFLAGS
=
$(COMPILED_TESTS_CPPFLAGS)
test_iter_LDADD
=
$(COMPILED_TESTS_LDADD)
test_meta_SOURCES
=
test-meta.cc hb-static.cc
test_meta_CPPFLAGS
=
$(COMPILED_TESTS_CPPFLAGS)
test_meta_LDADD
=
$(COMPILED_TESTS_LDADD)
test_ot_tag_SOURCES
=
hb-ot-tag.cc
test_ot_tag_CPPFLAGS
=
$(COMPILED_TESTS_CPPFLAGS)
test_ot_tag_LDADD
=
$(COMPILED_TESTS_LDADD)
...
...
src/hb-meta.hh
浏览文件 @
70a49f2e
...
...
@@ -52,6 +52,18 @@ typedef hb_bool_tt<true> hb_true_t;
typedef
hb_bool_tt
<
false
>
hb_false_t
;
/* Basic type SFINAE. */
template
<
bool
B
,
typename
T
=
void
>
struct
hb_enable_if
{};
template
<
typename
T
>
struct
hb_enable_if
<
true
,
T
>
{
typedef
T
type
;
};
#define hb_enable_if(Cond) typename hb_enable_if<(Cond)>::type* = nullptr
/* Concepts/Requires alias: */
#define hb_requires(Cond) hb_enable_if((Cond))
template
<
typename
T
,
typename
T2
>
struct
hb_is_same
:
hb_false_t
{};
template
<
typename
T
>
struct
hb_is_same
<
T
,
T
>
:
hb_true_t
{};
#define hb_is_same(T, T2) hb_is_same<T, T2>::value
/* Function overloading SFINAE and priority. */
#define HB_RETURN(Ret, E) -> hb_head_tt<Ret, decltype ((E))> { return (E); }
...
...
@@ -110,6 +122,40 @@ template <typename T> using hb_decay = hb_remove_const<hb_remove_reference<T>>;
hb_is_reference (A) >= hb_is_reference (B))
template
<
bool
B
,
class
T
,
class
F
>
struct
_hb_conditional
{
typedef
T
type
;
};
template
<
class
T
,
class
F
>
struct
_hb_conditional
<
false
,
T
,
F
>
{
typedef
F
type
;
};
template
<
bool
B
,
class
T
,
class
F
>
using
hb_conditional
=
typename
_hb_conditional
<
B
,
T
,
F
>::
type
;
template
<
typename
From
,
typename
To
>
struct
hb_is_convertible
{
private:
static
constexpr
bool
from_void
=
hb_is_same
(
void
,
hb_decay
<
From
>
);
static
constexpr
bool
to_void
=
hb_is_same
(
void
,
hb_decay
<
To
>
);
static
constexpr
bool
either_void
=
from_void
||
to_void
;
static
constexpr
bool
both_void
=
from_void
&&
to_void
;
static
hb_true_t
impl2
(
hb_conditional
<
to_void
,
int
,
To
>
);
template
<
typename
T
>
static
auto
impl
(
hb_priority
<
1
>
)
HB_AUTO_RETURN
(
impl2
(
hb_declval
(
T
))
)
template
<
typename
T
>
static
hb_false_t
impl
(
hb_priority
<
0
>
);
public:
static
constexpr
bool
value
=
both_void
||
(
!
either_void
&&
decltype
(
impl
<
hb_conditional
<
from_void
,
int
,
From
>>
(
hb_prioritize
))
::
value
);
};
#define hb_is_convertible(From,To) hb_is_convertible<From, To>::value
/* std::move and std::forward */
template
<
typename
T
>
...
...
@@ -162,16 +208,6 @@ struct hb_reference_wrapper<T&>
};
template
<
bool
B
,
typename
T
=
void
>
struct
hb_enable_if
{};
template
<
typename
T
>
struct
hb_enable_if
<
true
,
T
>
{
typedef
T
type
;
};
#define hb_enable_if(Cond) typename hb_enable_if<(Cond)>::type* = nullptr
/* Concepts/Requires alias: */
#define hb_requires(Cond) hb_enable_if((Cond))
template
<
typename
T
,
typename
T2
>
struct
hb_is_same
:
hb_false_t
{};
template
<
typename
T
>
struct
hb_is_same
<
T
,
T
>
:
hb_true_t
{};
#define hb_is_same(T, T2) hb_is_same<T, T2>::value
template
<
typename
T
>
struct
hb_is_signed
;
template
<
>
struct
hb_is_signed
<
char
>
{
static
constexpr
bool
value
=
CHAR_MIN
<
0
;
};
template
<
>
struct
hb_is_signed
<
signed
char
>
{
static
constexpr
bool
value
=
true
;
};
...
...
src/test-meta.cc
0 → 100644
浏览文件 @
70a49f2e
/*
* Copyright © 2019 Facebook, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Facebook Author(s): Behdad Esfahbod
*/
#include "hb.hh"
#include "hb-meta.hh"
int
main
(
int
argc
,
char
**
argv
)
{
static_assert
(
hb_is_convertible
(
void
,
void
));
static_assert
(
hb_is_convertible
(
void
,
const
void
));
static_assert
(
hb_is_convertible
(
const
void
,
void
));
static_assert
(
hb_is_convertible
(
int
,
int
));
static_assert
(
hb_is_convertible
(
char
,
int
));
static_assert
(
hb_is_convertible
(
long
,
int
));
static_assert
(
hb_is_convertible
(
int
,
int
));
static_assert
(
hb_is_convertible
(
const
int
,
int
));
static_assert
(
hb_is_convertible
(
int
,
const
int
));
static_assert
(
hb_is_convertible
(
const
int
,
const
int
));
static_assert
(
hb_is_convertible
(
int
&
,
int
));
static_assert
(
!
hb_is_convertible
(
int
,
int
&
));
static_assert
(
hb_is_convertible
(
int
,
const
int
&
));
static_assert
(
!
hb_is_convertible
(
const
int
,
int
&
));
static_assert
(
hb_is_convertible
(
const
int
,
const
int
&
));
static_assert
(
hb_is_convertible
(
int
&
,
const
int
));
static_assert
(
hb_is_convertible
(
const
int
&
,
int
));
static_assert
(
hb_is_convertible
(
const
int
&
,
const
int
));
static_assert
(
hb_is_convertible
(
int
&
,
long
));
static_assert
(
!
hb_is_convertible
(
int
&
,
long
&
));
static_assert
(
hb_is_convertible
(
int
*
,
int
*
));
static_assert
(
hb_is_convertible
(
int
*
,
const
int
*
));
static_assert
(
!
hb_is_convertible
(
const
int
*
,
int
*
));
static_assert
(
!
hb_is_convertible
(
int
*
,
long
*
));
static_assert
(
hb_is_convertible
(
int
*
,
void
*
));
static_assert
(
!
hb_is_convertible
(
void
*
,
int
*
));
return
0
;
}
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