ImportC bad handling of enum arguments for a function.
Dmytro Katyukha
firemage.dima at gmail.com
Mon Jan 30 20:38:46 UTC 2023
Because of
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i will post it here.
## Bug description
It seems that ImportC does not allow to pass enums declared with
typedef but without tag to function that receives enum as one of
argument
## The code snippets:
```c
// testlib.c
typedef enum /*enum_test_1_t*/ {
E_TEST_1_ITEM_1 = 1,
E_TEST_1_ITEM_2,
} enum_test_1_t;
int some_func(enum_test_1_t val) {
return val;
}
```
```d
//test.d
import testlib;
void main(string[] args) {
enum_test_1_t val1 = E_TEST_1_ITEM_1;
some_func(E_TEST_1_ITEM_1);
}
```
## Attempt to compile produce following output
```
dmd test.d testlib.c
test.d(6): Error: function `testlib.some_func(__tag2 val)` is not
callable using argument types `(__anonymous)`
test.d(6): cannot pass argument `E_TEST_1_ITEM_1` of type
`__anonymous` to parameter `__tag2 val`
```
## Verbose output of `dmd`
```
$ dmd -v test.d testlib.c
predefs DigitalMars LittleEndian D_Version2 all D_SIMD Posix
ELFv1 linux CRuntime_Glibc CppRuntime_Gcc D_InlineAsm_X86_64
X86_64 D_LP64 D_PIC assert D_PreConditions D_PostConditions
D_Invariants D_ModuleInfo D_Exceptions D_TypeInfo D_HardFloat
binary dmd
version v2.101.2
config /etc/dmd.conf
DFLAGS -I/usr/include/dmd/phobos
-I/usr/include/dmd/druntime/import -L-L/usr/lib/x86_64-linux-gnu
-L--export-dynamic -fPIC
include /usr/include/dmd/druntime/import/importc.h
cpp -m64 -dD testlib.c -include
/usr/include/dmd/druntime/import/importc.h testlib.i
parse test
parse testlib
importall test
import object (/usr/include/dmd/druntime/import/object.d)
import
core.attribute (/usr/include/dmd/druntime/import/core/attribute.d)
import
core.internal.hash (/usr/include/dmd/druntime/import/core/internal/hash.d)
import
core.internal.traits (/usr/include/dmd/druntime/import/core/internal/traits.d)
import
core.internal.entrypoint (/usr/include/dmd/druntime/import/core/internal/entrypoint.d)
import
core.internal.array.appending (/usr/include/dmd/druntime/import/core/internal/array/appending.d)
import
core.internal.array.comparison (/usr/include/dmd/druntime/import/core/internal/array/comparison.d)
import
core.internal.array.equality (/usr/include/dmd/druntime/import/core/internal/array/equality.d)
import
core.internal.array.casting (/usr/include/dmd/druntime/import/core/internal/array/casting.d)
import
core.internal.array.concatenation (/usr/include/dmd/druntime/import/core/internal/array/concatenation.d)
import
core.internal.array.construction (/usr/include/dmd/druntime/import/core/internal/array/construction.d)
import
core.internal.array.arrayassign (/usr/include/dmd/druntime/import/core/internal/array/arrayassign.d)
import
core.internal.array.capacity (/usr/include/dmd/druntime/import/core/internal/array/capacity.d)
import
core.internal.dassert (/usr/include/dmd/druntime/import/core/internal/dassert.d)
import
core.atomic (/usr/include/dmd/druntime/import/core/atomic.d)
import
core.internal.attributes (/usr/include/dmd/druntime/import/core/internal/attributes.d)
import
core.internal.atomic (/usr/include/dmd/druntime/import/core/internal/atomic.d)
import
core.internal.destruction (/usr/include/dmd/druntime/import/core/internal/destruction.d)
import
core.internal.moving (/usr/include/dmd/druntime/import/core/internal/moving.d)
import
core.internal.postblit (/usr/include/dmd/druntime/import/core/internal/postblit.d)
import
core.internal.switch_ (/usr/include/dmd/druntime/import/core/internal/switch_.d)
import
core.lifetime (/usr/include/dmd/druntime/import/core/lifetime.d)
import
core.builtins (/usr/include/dmd/druntime/import/core/builtins.d)
importall testlib
semantic test
entry main test.d
semantic testlib
semantic2 test
semantic2 testlib
semantic3 test
test.d(6): Error: function `testlib.some_func(__tag2 val)` is not
callable using argument types `(__anonymous)`
test.d(6): cannot pass argument `E_TEST_1_ITEM_1` of type
`__anonymous` to parameter `__tag2 val`
semantic3 testlib
```
Output of CPP preprocessor (testlib.i):
```c
# 0 "testlib.c"
# 0 "<built-in>"
#define __STDC__ 1
# 0 "<built-in>"
#define __STDC_VERSION__ 201710L
# 0 "<built-in>"
#define __STDC_UTF_16__ 1
# 0 "<built-in>"
#define __STDC_UTF_32__ 1
# 0 "<built-in>"
#define __STDC_HOSTED__ 1
# 0 "<built-in>"
#define __GNUC__ 12
# 0 "<built-in>"
#define __GNUC_MINOR__ 2
# 0 "<built-in>"
#define __GNUC_PATCHLEVEL__ 0
# 0 "<built-in>"
#define __VERSION__ "12.2.0"
# 0 "<built-in>"
#define __ATOMIC_RELAXED 0
# 0 "<built-in>"
#define __ATOMIC_SEQ_CST 5
# 0 "<built-in>"
#define __ATOMIC_ACQUIRE 2
# 0 "<built-in>"
#define __ATOMIC_RELEASE 3
# 0 "<built-in>"
#define __ATOMIC_ACQ_REL 4
# 0 "<built-in>"
#define __ATOMIC_CONSUME 1
# 0 "<built-in>"
#define __pic__ 2
# 0 "<built-in>"
#define __PIC__ 2
# 0 "<built-in>"
#define __pie__ 2
# 0 "<built-in>"
#define __PIE__ 2
# 0 "<built-in>"
#define __FINITE_MATH_ONLY__ 0
# 0 "<built-in>"
#define _LP64 1
# 0 "<built-in>"
#define __LP64__ 1
# 0 "<built-in>"
#define __SIZEOF_INT__ 4
# 0 "<built-in>"
#define __SIZEOF_LONG__ 8
# 0 "<built-in>"
#define __SIZEOF_LONG_LONG__ 8
# 0 "<built-in>"
#define __SIZEOF_SHORT__ 2
# 0 "<built-in>"
#define __SIZEOF_FLOAT__ 4
# 0 "<built-in>"
#define __SIZEOF_DOUBLE__ 8
# 0 "<built-in>"
#define __SIZEOF_LONG_DOUBLE__ 16
# 0 "<built-in>"
#define __SIZEOF_SIZE_T__ 8
# 0 "<built-in>"
#define __CHAR_BIT__ 8
# 0 "<built-in>"
#define __BIGGEST_ALIGNMENT__ 16
# 0 "<built-in>"
#define __ORDER_LITTLE_ENDIAN__ 1234
# 0 "<built-in>"
#define __ORDER_BIG_ENDIAN__ 4321
# 0 "<built-in>"
#define __ORDER_PDP_ENDIAN__ 3412
# 0 "<built-in>"
#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
# 0 "<built-in>"
#define __FLOAT_WORD_ORDER__ __ORDER_LITTLE_ENDIAN__
# 0 "<built-in>"
#define __SIZEOF_POINTER__ 8
# 0 "<built-in>"
#define __GNUC_EXECUTION_CHARSET_NAME "UTF-8"
# 0 "<built-in>"
#define __GNUC_WIDE_EXECUTION_CHARSET_NAME "UTF-32LE"
# 0 "<built-in>"
#define __SIZE_TYPE__ long unsigned int
# 0 "<built-in>"
#define __PTRDIFF_TYPE__ long int
# 0 "<built-in>"
#define __WCHAR_TYPE__ int
# 0 "<built-in>"
#define __WINT_TYPE__ unsigned int
# 0 "<built-in>"
#define __INTMAX_TYPE__ long int
# 0 "<built-in>"
#define __UINTMAX_TYPE__ long unsigned int
# 0 "<built-in>"
#define __CHAR16_TYPE__ short unsigned int
# 0 "<built-in>"
#define __CHAR32_TYPE__ unsigned int
# 0 "<built-in>"
#define __SIG_ATOMIC_TYPE__ int
# 0 "<built-in>"
#define __INT8_TYPE__ signed char
# 0 "<built-in>"
#define __INT16_TYPE__ short int
# 0 "<built-in>"
#define __INT32_TYPE__ int
# 0 "<built-in>"
#define __INT64_TYPE__ long int
# 0 "<built-in>"
#define __UINT8_TYPE__ unsigned char
# 0 "<built-in>"
#define __UINT16_TYPE__ short unsigned int
# 0 "<built-in>"
#define __UINT32_TYPE__ unsigned int
# 0 "<built-in>"
#define __UINT64_TYPE__ long unsigned int
# 0 "<built-in>"
#define __INT_LEAST8_TYPE__ signed char
# 0 "<built-in>"
#define __INT_LEAST16_TYPE__ short int
# 0 "<built-in>"
#define __INT_LEAST32_TYPE__ int
# 0 "<built-in>"
#define __INT_LEAST64_TYPE__ long int
# 0 "<built-in>"
#define __UINT_LEAST8_TYPE__ unsigned char
# 0 "<built-in>"
#define __UINT_LEAST16_TYPE__ short unsigned int
# 0 "<built-in>"
#define __UINT_LEAST32_TYPE__ unsigned int
# 0 "<built-in>"
#define __UINT_LEAST64_TYPE__ long unsigned int
# 0 "<built-in>"
#define __INT_FAST8_TYPE__ signed char
# 0 "<built-in>"
#define __INT_FAST16_TYPE__ long int
# 0 "<built-in>"
#define __INT_FAST32_TYPE__ long int
# 0 "<built-in>"
#define __INT_FAST64_TYPE__ long int
# 0 "<built-in>"
#define __UINT_FAST8_TYPE__ unsigned char
# 0 "<built-in>"
#define __UINT_FAST16_TYPE__ long unsigned int
# 0 "<built-in>"
#define __UINT_FAST32_TYPE__ long unsigned int
# 0 "<built-in>"
#define __UINT_FAST64_TYPE__ long unsigned int
# 0 "<built-in>"
#define __INTPTR_TYPE__ long int
# 0 "<built-in>"
#define __UINTPTR_TYPE__ long unsigned int
# 0 "<built-in>"
#define __GXX_ABI_VERSION 1017
# 0 "<built-in>"
#define __SCHAR_MAX__ 0x7f
# 0 "<built-in>"
#define __SHRT_MAX__ 0x7fff
# 0 "<built-in>"
#define __INT_MAX__ 0x7fffffff
# 0 "<built-in>"
#define __LONG_MAX__ 0x7fffffffffffffffL
# 0 "<built-in>"
#define __LONG_LONG_MAX__ 0x7fffffffffffffffLL
# 0 "<built-in>"
#define __WCHAR_MAX__ 0x7fffffff
# 0 "<built-in>"
#define __WCHAR_MIN__ (-__WCHAR_MAX__ - 1)
# 0 "<built-in>"
#define __WINT_MAX__ 0xffffffffU
# 0 "<built-in>"
#define __WINT_MIN__ 0U
# 0 "<built-in>"
#define __PTRDIFF_MAX__ 0x7fffffffffffffffL
# 0 "<built-in>"
#define __SIZE_MAX__ 0xffffffffffffffffUL
# 0 "<built-in>"
#define __SCHAR_WIDTH__ 8
# 0 "<built-in>"
#define __SHRT_WIDTH__ 16
# 0 "<built-in>"
#define __INT_WIDTH__ 32
# 0 "<built-in>"
#define __LONG_WIDTH__ 64
# 0 "<built-in>"
#define __LONG_LONG_WIDTH__ 64
# 0 "<built-in>"
#define __WCHAR_WIDTH__ 32
# 0 "<built-in>"
#define __WINT_WIDTH__ 32
# 0 "<built-in>"
#define __PTRDIFF_WIDTH__ 64
# 0 "<built-in>"
#define __SIZE_WIDTH__ 64
# 0 "<built-in>"
#define __INTMAX_MAX__ 0x7fffffffffffffffL
# 0 "<built-in>"
#define __INTMAX_C(c) c ## L
# 0 "<built-in>"
#define __UINTMAX_MAX__ 0xffffffffffffffffUL
# 0 "<built-in>"
#define __UINTMAX_C(c) c ## UL
# 0 "<built-in>"
#define __INTMAX_WIDTH__ 64
# 0 "<built-in>"
#define __SIG_ATOMIC_MAX__ 0x7fffffff
# 0 "<built-in>"
#define __SIG_ATOMIC_MIN__ (-__SIG_ATOMIC_MAX__ - 1)
# 0 "<built-in>"
#define __SIG_ATOMIC_WIDTH__ 32
# 0 "<built-in>"
#define __INT8_MAX__ 0x7f
# 0 "<built-in>"
#define __INT16_MAX__ 0x7fff
# 0 "<built-in>"
#define __INT32_MAX__ 0x7fffffff
# 0 "<built-in>"
#define __INT64_MAX__ 0x7fffffffffffffffL
# 0 "<built-in>"
#define __UINT8_MAX__ 0xff
# 0 "<built-in>"
#define __UINT16_MAX__ 0xffff
# 0 "<built-in>"
#define __UINT32_MAX__ 0xffffffffU
# 0 "<built-in>"
#define __UINT64_MAX__ 0xffffffffffffffffUL
# 0 "<built-in>"
#define __INT_LEAST8_MAX__ 0x7f
# 0 "<built-in>"
#define __INT8_C(c) c
# 0 "<built-in>"
#define __INT_LEAST8_WIDTH__ 8
# 0 "<built-in>"
#define __INT_LEAST16_MAX__ 0x7fff
# 0 "<built-in>"
#define __INT16_C(c) c
# 0 "<built-in>"
#define __INT_LEAST16_WIDTH__ 16
# 0 "<built-in>"
#define __INT_LEAST32_MAX__ 0x7fffffff
# 0 "<built-in>"
#define __INT32_C(c) c
# 0 "<built-in>"
#define __INT_LEAST32_WIDTH__ 32
# 0 "<built-in>"
#define __INT_LEAST64_MAX__ 0x7fffffffffffffffL
# 0 "<built-in>"
#define __INT64_C(c) c ## L
# 0 "<built-in>"
#define __INT_LEAST64_WIDTH__ 64
# 0 "<built-in>"
#define __UINT_LEAST8_MAX__ 0xff
# 0 "<built-in>"
#define __UINT8_C(c) c
# 0 "<built-in>"
#define __UINT_LEAST16_MAX__ 0xffff
# 0 "<built-in>"
#define __UINT16_C(c) c
# 0 "<built-in>"
#define __UINT_LEAST32_MAX__ 0xffffffffU
# 0 "<built-in>"
#define __UINT32_C(c) c ## U
# 0 "<built-in>"
#define __UINT_LEAST64_MAX__ 0xffffffffffffffffUL
# 0 "<built-in>"
#define __UINT64_C(c) c ## UL
# 0 "<built-in>"
#define __INT_FAST8_MAX__ 0x7f
# 0 "<built-in>"
#define __INT_FAST8_WIDTH__ 8
# 0 "<built-in>"
#define __INT_FAST16_MAX__ 0x7fffffffffffffffL
# 0 "<built-in>"
#define __INT_FAST16_WIDTH__ 64
# 0 "<built-in>"
#define __INT_FAST32_MAX__ 0x7fffffffffffffffL
# 0 "<built-in>"
#define __INT_FAST32_WIDTH__ 64
# 0 "<built-in>"
#define __INT_FAST64_MAX__ 0x7fffffffffffffffL
# 0 "<built-in>"
#define __INT_FAST64_WIDTH__ 64
# 0 "<built-in>"
#define __UINT_FAST8_MAX__ 0xff
# 0 "<built-in>"
#define __UINT_FAST16_MAX__ 0xffffffffffffffffUL
# 0 "<built-in>"
#define __UINT_FAST32_MAX__ 0xffffffffffffffffUL
# 0 "<built-in>"
#define __UINT_FAST64_MAX__ 0xffffffffffffffffUL
# 0 "<built-in>"
#define __INTPTR_MAX__ 0x7fffffffffffffffL
# 0 "<built-in>"
#define __INTPTR_WIDTH__ 64
# 0 "<built-in>"
#define __UINTPTR_MAX__ 0xffffffffffffffffUL
# 0 "<built-in>"
#define __GCC_IEC_559 2
# 0 "<built-in>"
#define __GCC_IEC_559_COMPLEX 2
# 0 "<built-in>"
#define __FLT_EVAL_METHOD__ 0
# 0 "<built-in>"
#define __FLT_EVAL_METHOD_TS_18661_3__ 0
# 0 "<built-in>"
#define __DEC_EVAL_METHOD__ 2
# 0 "<built-in>"
#define __FLT_RADIX__ 2
# 0 "<built-in>"
#define __FLT_MANT_DIG__ 24
# 0 "<built-in>"
#define __FLT_DIG__ 6
# 0 "<built-in>"
#define __FLT_MIN_EXP__ (-125)
# 0 "<built-in>"
#define __FLT_MIN_10_EXP__ (-37)
# 0 "<built-in>"
#define __FLT_MAX_EXP__ 128
# 0 "<built-in>"
#define __FLT_MAX_10_EXP__ 38
# 0 "<built-in>"
#define __FLT_DECIMAL_DIG__ 9
# 0 "<built-in>"
#define __FLT_MAX__ 3.40282346638528859811704183484516925e+38F
# 0 "<built-in>"
#define __FLT_NORM_MAX__
3.40282346638528859811704183484516925e+38F
# 0 "<built-in>"
#define __FLT_MIN__ 1.17549435082228750796873653722224568e-38F
# 0 "<built-in>"
#define __FLT_EPSILON__ 1.19209289550781250000000000000000000e-7F
# 0 "<built-in>"
#define __FLT_DENORM_MIN__
1.40129846432481707092372958328991613e-45F
# 0 "<built-in>"
#define __FLT_HAS_DENORM__ 1
# 0 "<built-in>"
#define __FLT_HAS_INFINITY__ 1
# 0 "<built-in>"
#define __FLT_HAS_QUIET_NAN__ 1
# 0 "<built-in>"
#define __FLT_IS_IEC_60559__ 2
# 0 "<built-in>"
#define __DBL_MANT_DIG__ 53
# 0 "<built-in>"
#define __DBL_DIG__ 15
# 0 "<built-in>"
#define __DBL_MIN_EXP__ (-1021)
# 0 "<built-in>"
#define __DBL_MIN_10_EXP__ (-307)
# 0 "<built-in>"
#define __DBL_MAX_EXP__ 1024
# 0 "<built-in>"
#define __DBL_MAX_10_EXP__ 308
# 0 "<built-in>"
#define __DBL_DECIMAL_DIG__ 17
# 0 "<built-in>"
#define __DBL_MAX__
((double)1.79769313486231570814527423731704357e+308L)
# 0 "<built-in>"
#define __DBL_NORM_MAX__
((double)1.79769313486231570814527423731704357e+308L)
# 0 "<built-in>"
#define __DBL_MIN__
((double)2.22507385850720138309023271733240406e-308L)
# 0 "<built-in>"
#define __DBL_EPSILON__
((double)2.22044604925031308084726333618164062e-16L)
# 0 "<built-in>"
#define __DBL_DENORM_MIN__
((double)4.94065645841246544176568792868221372e-324L)
# 0 "<built-in>"
#define __DBL_HAS_DENORM__ 1
# 0 "<built-in>"
#define __DBL_HAS_INFINITY__ 1
# 0 "<built-in>"
#define __DBL_HAS_QUIET_NAN__ 1
# 0 "<built-in>"
#define __DBL_IS_IEC_60559__ 2
# 0 "<built-in>"
#define __LDBL_MANT_DIG__ 64
# 0 "<built-in>"
#define __LDBL_DIG__ 18
# 0 "<built-in>"
#define __LDBL_MIN_EXP__ (-16381)
# 0 "<built-in>"
#define __LDBL_MIN_10_EXP__ (-4931)
# 0 "<built-in>"
#define __LDBL_MAX_EXP__ 16384
# 0 "<built-in>"
#define __LDBL_MAX_10_EXP__ 4932
# 0 "<built-in>"
#define __DECIMAL_DIG__ 21
# 0 "<built-in>"
#define __LDBL_DECIMAL_DIG__ 21
# 0 "<built-in>"
#define __LDBL_MAX__ 1.18973149535723176502126385303097021e+4932L
# 0 "<built-in>"
#define __LDBL_NORM_MAX__
1.18973149535723176502126385303097021e+4932L
# 0 "<built-in>"
#define __LDBL_MIN__ 3.36210314311209350626267781732175260e-4932L
# 0 "<built-in>"
#define __LDBL_EPSILON__
1.08420217248550443400745280086994171e-19L
# 0 "<built-in>"
#define __LDBL_DENORM_MIN__
3.64519953188247460252840593361941982e-4951L
# 0 "<built-in>"
#define __LDBL_HAS_DENORM__ 1
# 0 "<built-in>"
#define __LDBL_HAS_INFINITY__ 1
# 0 "<built-in>"
#define __LDBL_HAS_QUIET_NAN__ 1
# 0 "<built-in>"
#define __LDBL_IS_IEC_60559__ 2
# 0 "<built-in>"
#define __FLT16_MANT_DIG__ 11
# 0 "<built-in>"
#define __FLT16_DIG__ 3
# 0 "<built-in>"
#define __FLT16_MIN_EXP__ (-13)
# 0 "<built-in>"
#define __FLT16_MIN_10_EXP__ (-4)
# 0 "<built-in>"
#define __FLT16_MAX_EXP__ 16
# 0 "<built-in>"
#define __FLT16_MAX_10_EXP__ 4
# 0 "<built-in>"
#define __FLT16_DECIMAL_DIG__ 5
# 0 "<built-in>"
#define __FLT16_MAX__ 6.55040000000000000000000000000000000e+4F16
# 0 "<built-in>"
#define __FLT16_NORM_MAX__
6.55040000000000000000000000000000000e+4F16
# 0 "<built-in>"
#define __FLT16_MIN__ 6.10351562500000000000000000000000000e-5F16
# 0 "<built-in>"
#define __FLT16_EPSILON__
9.76562500000000000000000000000000000e-4F16
# 0 "<built-in>"
#define __FLT16_DENORM_MIN__
5.96046447753906250000000000000000000e-8F16
# 0 "<built-in>"
#define __FLT16_HAS_DENORM__ 1
# 0 "<built-in>"
#define __FLT16_HAS_INFINITY__ 1
# 0 "<built-in>"
#define __FLT16_HAS_QUIET_NAN__ 1
# 0 "<built-in>"
#define __FLT16_IS_IEC_60559__ 2
# 0 "<built-in>"
#define __FLT32_MANT_DIG__ 24
# 0 "<built-in>"
#define __FLT32_DIG__ 6
# 0 "<built-in>"
#define __FLT32_MIN_EXP__ (-125)
# 0 "<built-in>"
#define __FLT32_MIN_10_EXP__ (-37)
# 0 "<built-in>"
#define __FLT32_MAX_EXP__ 128
# 0 "<built-in>"
#define __FLT32_MAX_10_EXP__ 38
# 0 "<built-in>"
#define __FLT32_DECIMAL_DIG__ 9
# 0 "<built-in>"
#define __FLT32_MAX__ 3.40282346638528859811704183484516925e+38F32
# 0 "<built-in>"
#define __FLT32_NORM_MAX__
3.40282346638528859811704183484516925e+38F32
# 0 "<built-in>"
#define __FLT32_MIN__ 1.17549435082228750796873653722224568e-38F32
# 0 "<built-in>"
#define __FLT32_EPSILON__
1.19209289550781250000000000000000000e-7F32
# 0 "<built-in>"
#define __FLT32_DENORM_MIN__
1.40129846432481707092372958328991613e-45F32
# 0 "<built-in>"
#define __FLT32_HAS_DENORM__ 1
# 0 "<built-in>"
#define __FLT32_HAS_INFINITY__ 1
# 0 "<built-in>"
#define __FLT32_HAS_QUIET_NAN__ 1
# 0 "<built-in>"
#define __FLT32_IS_IEC_60559__ 2
# 0 "<built-in>"
#define __FLT64_MANT_DIG__ 53
# 0 "<built-in>"
#define __FLT64_DIG__ 15
# 0 "<built-in>"
#define __FLT64_MIN_EXP__ (-1021)
# 0 "<built-in>"
#define __FLT64_MIN_10_EXP__ (-307)
# 0 "<built-in>"
#define __FLT64_MAX_EXP__ 1024
# 0 "<built-in>"
#define __FLT64_MAX_10_EXP__ 308
# 0 "<built-in>"
#define __FLT64_DECIMAL_DIG__ 17
# 0 "<built-in>"
#define __FLT64_MAX__
1.79769313486231570814527423731704357e+308F64
# 0 "<built-in>"
#define __FLT64_NORM_MAX__
1.79769313486231570814527423731704357e+308F64
# 0 "<built-in>"
#define __FLT64_MIN__
2.22507385850720138309023271733240406e-308F64
# 0 "<built-in>"
#define __FLT64_EPSILON__
2.22044604925031308084726333618164062e-16F64
# 0 "<built-in>"
#define __FLT64_DENORM_MIN__
4.94065645841246544176568792868221372e-324F64
# 0 "<built-in>"
#define __FLT64_HAS_DENORM__ 1
# 0 "<built-in>"
#define __FLT64_HAS_INFINITY__ 1
# 0 "<built-in>"
#define __FLT64_HAS_QUIET_NAN__ 1
# 0 "<built-in>"
#define __FLT64_IS_IEC_60559__ 2
# 0 "<built-in>"
#define __FLT128_MANT_DIG__ 113
# 0 "<built-in>"
#define __FLT128_DIG__ 33
# 0 "<built-in>"
#define __FLT128_MIN_EXP__ (-16381)
# 0 "<built-in>"
#define __FLT128_MIN_10_EXP__ (-4931)
# 0 "<built-in>"
#define __FLT128_MAX_EXP__ 16384
# 0 "<built-in>"
#define __FLT128_MAX_10_EXP__ 4932
# 0 "<built-in>"
#define __FLT128_DECIMAL_DIG__ 36
# 0 "<built-in>"
#define __FLT128_MAX__
1.18973149535723176508575932662800702e+4932F128
# 0 "<built-in>"
#define __FLT128_NORM_MAX__
1.18973149535723176508575932662800702e+4932F128
# 0 "<built-in>"
#define __FLT128_MIN__
3.36210314311209350626267781732175260e-4932F128
# 0 "<built-in>"
#define __FLT128_EPSILON__
1.92592994438723585305597794258492732e-34F128
# 0 "<built-in>"
#define __FLT128_DENORM_MIN__
6.47517511943802511092443895822764655e-4966F128
# 0 "<built-in>"
#define __FLT128_HAS_DENORM__ 1
# 0 "<built-in>"
#define __FLT128_HAS_INFINITY__ 1
# 0 "<built-in>"
#define __FLT128_HAS_QUIET_NAN__ 1
# 0 "<built-in>"
#define __FLT128_IS_IEC_60559__ 2
# 0 "<built-in>"
#define __FLT32X_MANT_DIG__ 53
# 0 "<built-in>"
#define __FLT32X_DIG__ 15
# 0 "<built-in>"
#define __FLT32X_MIN_EXP__ (-1021)
# 0 "<built-in>"
#define __FLT32X_MIN_10_EXP__ (-307)
# 0 "<built-in>"
#define __FLT32X_MAX_EXP__ 1024
# 0 "<built-in>"
#define __FLT32X_MAX_10_EXP__ 308
# 0 "<built-in>"
#define __FLT32X_DECIMAL_DIG__ 17
# 0 "<built-in>"
#define __FLT32X_MAX__
1.79769313486231570814527423731704357e+308F32x
# 0 "<built-in>"
#define __FLT32X_NORM_MAX__
1.79769313486231570814527423731704357e+308F32x
# 0 "<built-in>"
#define __FLT32X_MIN__
2.22507385850720138309023271733240406e-308F32x
# 0 "<built-in>"
#define __FLT32X_EPSILON__
2.22044604925031308084726333618164062e-16F32x
# 0 "<built-in>"
#define __FLT32X_DENORM_MIN__
4.94065645841246544176568792868221372e-324F32x
# 0 "<built-in>"
#define __FLT32X_HAS_DENORM__ 1
# 0 "<built-in>"
#define __FLT32X_HAS_INFINITY__ 1
# 0 "<built-in>"
#define __FLT32X_HAS_QUIET_NAN__ 1
# 0 "<built-in>"
#define __FLT32X_IS_IEC_60559__ 2
# 0 "<built-in>"
#define __FLT64X_MANT_DIG__ 64
# 0 "<built-in>"
#define __FLT64X_DIG__ 18
# 0 "<built-in>"
#define __FLT64X_MIN_EXP__ (-16381)
# 0 "<built-in>"
#define __FLT64X_MIN_10_EXP__ (-4931)
# 0 "<built-in>"
#define __FLT64X_MAX_EXP__ 16384
# 0 "<built-in>"
#define __FLT64X_MAX_10_EXP__ 4932
# 0 "<built-in>"
#define __FLT64X_DECIMAL_DIG__ 21
# 0 "<built-in>"
#define __FLT64X_MAX__
1.18973149535723176502126385303097021e+4932F64x
# 0 "<built-in>"
#define __FLT64X_NORM_MAX__
1.18973149535723176502126385303097021e+4932F64x
# 0 "<built-in>"
#define __FLT64X_MIN__
3.36210314311209350626267781732175260e-4932F64x
# 0 "<built-in>"
#define __FLT64X_EPSILON__
1.08420217248550443400745280086994171e-19F64x
# 0 "<built-in>"
#define __FLT64X_DENORM_MIN__
3.64519953188247460252840593361941982e-4951F64x
# 0 "<built-in>"
#define __FLT64X_HAS_DENORM__ 1
# 0 "<built-in>"
#define __FLT64X_HAS_INFINITY__ 1
# 0 "<built-in>"
#define __FLT64X_HAS_QUIET_NAN__ 1
# 0 "<built-in>"
#define __FLT64X_IS_IEC_60559__ 2
# 0 "<built-in>"
#define __DEC32_MANT_DIG__ 7
# 0 "<built-in>"
#define __DEC32_MIN_EXP__ (-94)
# 0 "<built-in>"
#define __DEC32_MAX_EXP__ 97
# 0 "<built-in>"
#define __DEC32_MIN__ 1E-95DF
# 0 "<built-in>"
#define __DEC32_MAX__ 9.999999E96DF
# 0 "<built-in>"
#define __DEC32_EPSILON__ 1E-6DF
# 0 "<built-in>"
#define __DEC32_SUBNORMAL_MIN__ 0.000001E-95DF
# 0 "<built-in>"
#define __DEC64_MANT_DIG__ 16
# 0 "<built-in>"
#define __DEC64_MIN_EXP__ (-382)
# 0 "<built-in>"
#define __DEC64_MAX_EXP__ 385
# 0 "<built-in>"
#define __DEC64_MIN__ 1E-383DD
# 0 "<built-in>"
#define __DEC64_MAX__ 9.999999999999999E384DD
# 0 "<built-in>"
#define __DEC64_EPSILON__ 1E-15DD
# 0 "<built-in>"
#define __DEC64_SUBNORMAL_MIN__ 0.000000000000001E-383DD
# 0 "<built-in>"
#define __DEC128_MANT_DIG__ 34
# 0 "<built-in>"
#define __DEC128_MIN_EXP__ (-6142)
# 0 "<built-in>"
#define __DEC128_MAX_EXP__ 6145
# 0 "<built-in>"
#define __DEC128_MIN__ 1E-6143DL
# 0 "<built-in>"
#define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL
# 0 "<built-in>"
#define __DEC128_EPSILON__ 1E-33DL
# 0 "<built-in>"
#define __DEC128_SUBNORMAL_MIN__
0.000000000000000000000000000000001E-6143DL
# 0 "<built-in>"
#define __REGISTER_PREFIX__
# 0 "<built-in>"
#define __USER_LABEL_PREFIX__
# 0 "<built-in>"
#define __GNUC_STDC_INLINE__ 1
# 0 "<built-in>"
#define __NO_INLINE__ 1
# 0 "<built-in>"
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
# 0 "<built-in>"
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
# 0 "<built-in>"
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
# 0 "<built-in>"
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
# 0 "<built-in>"
#define __GCC_ATOMIC_BOOL_LOCK_FREE 2
# 0 "<built-in>"
#define __GCC_ATOMIC_CHAR_LOCK_FREE 2
# 0 "<built-in>"
#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
# 0 "<built-in>"
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
# 0 "<built-in>"
#define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
# 0 "<built-in>"
#define __GCC_ATOMIC_SHORT_LOCK_FREE 2
# 0 "<built-in>"
#define __GCC_ATOMIC_INT_LOCK_FREE 2
# 0 "<built-in>"
#define __GCC_ATOMIC_LONG_LOCK_FREE 2
# 0 "<built-in>"
#define __GCC_ATOMIC_LLONG_LOCK_FREE 2
# 0 "<built-in>"
#define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
# 0 "<built-in>"
#define __GCC_DESTRUCTIVE_SIZE 64
# 0 "<built-in>"
#define __GCC_CONSTRUCTIVE_SIZE 64
# 0 "<built-in>"
#define __GCC_ATOMIC_POINTER_LOCK_FREE 2
# 0 "<built-in>"
#define __HAVE_SPECULATION_SAFE_VALUE 1
# 0 "<built-in>"
#define __GCC_HAVE_DWARF2_CFI_ASM 1
# 0 "<built-in>"
#define __PRAGMA_REDEFINE_EXTNAME 1
# 0 "<built-in>"
#define __SSP_STRONG__ 3
# 0 "<built-in>"
#define __SIZEOF_INT128__ 16
# 0 "<built-in>"
#define __SIZEOF_WCHAR_T__ 4
# 0 "<built-in>"
#define __SIZEOF_WINT_T__ 4
# 0 "<built-in>"
#define __SIZEOF_PTRDIFF_T__ 8
# 0 "<built-in>"
#define __amd64 1
# 0 "<built-in>"
#define __amd64__ 1
# 0 "<built-in>"
#define __x86_64 1
# 0 "<built-in>"
#define __x86_64__ 1
# 0 "<built-in>"
#define __SIZEOF_FLOAT80__ 16
# 0 "<built-in>"
#define __SIZEOF_FLOAT128__ 16
# 0 "<built-in>"
#define __ATOMIC_HLE_ACQUIRE 65536
# 0 "<built-in>"
#define __ATOMIC_HLE_RELEASE 131072
# 0 "<built-in>"
#define __GCC_ASM_FLAG_OUTPUTS__ 1
# 0 "<built-in>"
#define __k8 1
# 0 "<built-in>"
#define __k8__ 1
# 0 "<built-in>"
#define __code_model_small__ 1
# 0 "<built-in>"
#define __MMX__ 1
# 0 "<built-in>"
#define __SSE__ 1
# 0 "<built-in>"
#define __SSE2__ 1
# 0 "<built-in>"
#define __FXSR__ 1
# 0 "<built-in>"
#define __SSE_MATH__ 1
# 0 "<built-in>"
#define __SSE2_MATH__ 1
# 0 "<built-in>"
#define __MMX_WITH_SSE__ 1
# 0 "<built-in>"
#define __SEG_FS 1
# 0 "<built-in>"
#define __SEG_GS 1
# 0 "<built-in>"
#define __CET__ 3
# 0 "<built-in>"
#define __gnu_linux__ 1
# 0 "<built-in>"
#define __linux 1
# 0 "<built-in>"
#define __linux__ 1
# 0 "<built-in>"
#define linux 1
# 0 "<built-in>"
#define __unix 1
# 0 "<built-in>"
#define __unix__ 1
# 0 "<built-in>"
#define unix 1
# 0 "<built-in>"
#define __ELF__ 1
# 0 "<built-in>"
#define __DECIMAL_BID_FORMAT__ 1
# 0 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 19 "/usr/include/stdc-predef.h" 3 4
#define _STDC_PREDEF_H 1
# 38 "/usr/include/stdc-predef.h" 3 4
#define __STDC_IEC_559__ 1
#define __STDC_IEC_60559_BFP__ 201404L
# 48 "/usr/include/stdc-predef.h" 3 4
#define __STDC_IEC_559_COMPLEX__ 1
#define __STDC_IEC_60559_COMPLEX__ 201404L
# 62 "/usr/include/stdc-predef.h" 3 4
#define __STDC_ISO_10646__ 201706L
# 0 "<command-line>" 2
# 1 "/usr/include/dmd/druntime/import/importc.h" 1
# 14 "/usr/include/dmd/druntime/import/importc.h"
#define __IMPORTC__ 1
#define __restrict
#define __restrict__
#define __signed__ signed
#define __asm__ asm
#define __asm asm
#define __inline__ inline
#define __inline inline
#define _Nonnull
#define _Nullable
#define _Null_unspecified
#define __fastcall
#define __int8 char
#define __int16 short
#define __int32 int
#define __int64 long long
#define __cdecl
#define __ss
#define __cs
#define __far
#define __near
#define __handle
#define __pascal
#define __extension__
#define __builtin_offsetof(t,i) ((typeof(sizeof(0)))((char *)&((t
*)0)->i - (char *)0))
#define __STDC_NO_VLA__ 1
# 0 "<command-line>" 2
# 1 "testlib.c"
typedef enum {
E_TEST_1_ITEM_1 = 1,
E_TEST_1_ITEM_2,
} enum_test_1_t;
int some_func(enum_test_1_t val) {
return val;
}
```
## Environment
```
$ dmd --version
DMD64 D Compiler v2.101.2
Copyright (C) 1999-2022 by The D Language Foundation, All Rights
Reserved written by Walter Bright
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.10
Release: 22.10
Codename: kinetic
```
## Usage in real libraries
Such kind of declarations are used in libgit2. For example:
```c
/** Tree traversal modes */
typedef enum {
GIT_TREEWALK_PRE = 0, /* Pre-order */
GIT_TREEWALK_POST = 1, /* Post-order */
} git_treewalk_mode;
/**
* Traverse the entries in a tree and its subtrees in post or pre
order.
*
* The entries will be traversed in the specified order, children
subtrees
* will be automatically loaded as required, and the `callback`
will be
* called once per entry with the current (relative) root for the
entry and
* the entry data itself.
*
* If the callback returns a positive value, the passed entry
will be
* skipped on the traversal (in pre mode). A negative value stops
the walk.
*
* @param tree The tree to walk
* @param mode Traversal mode (pre or post-order)
* @param callback Function to call on each tree entry
* @param payload Opaque pointer to be passed on each callback
* @return 0 or an error code
*/
GIT_EXTERN(int) git_tree_walk(
const git_tree *tree,
git_treewalk_mode mode,
git_treewalk_cb callback,
void *payload);
```
## My impression of ImportC
At first glance, ImportC seems to a nice feature of the D
Language, that could significantly reduce amount of time needed
to integrate with third-party C libraries.
I wish, one day we could be able just do something like:
```d
ImportC git2;
import std.stdio;
import std.string;
void main(string[] args) {
git_libgit2_init();
scope(exit) git_libgit2_shutdown();
git_repository* repo = null;
scope(exit) git_repository_free(repo);
if (git_repository_open(&repo, args[1].toStringz) != 0) {
writefln("Cannot open git repo: %s",
giterr_last().message.fromStringz);
return;
}
/// So something useful with repository
}
```
Currently, ImportC works fune for simple libraries like libzip.
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