Errors: can not implicitly convert expression ...

[ErunamoJAZZ]

Hello.

When trying to compile the program, viewing many errors "can not implicitly convert expression ...".

I used the compiler dmd2(DMD64 D Compiler v2.060 - rdmd build 20120724), in Debian Wheezy.

This is the console out:

$ rdmd build base swt
(in /home/erunamo/Publico/DWT/dwt)
Building dwt-base
workdir=>/home/erunamo/Publico/DWT/dwt/base/src
cat /home/erunamo/Publico/DWT/dwt/rsp | xargs dmd
java/lang/String.d(117): Error: cannot implicitly convert expression (str.length) of type ulong to int
java/lang/String.d(144): Error: cannot implicitly convert expression (indexOf(str,cast(dchar)searched,cast(CaseSensitive)1)) of type long to int
java/lang/String.d(155): Error: cannot implicitly convert expression (indexOf(str[cast(ulong)fromIndex..__dollar],cast(dchar)searched,cast(CaseSensitive)1)) of type long to int
java/lang/String.d(175): Error: cannot implicitly convert expression (indexOf(str[cast(ulong)fromIndex..__dollar],sub,cast(CaseSensitive)1)) of type long to int
java/lang/String.d(183): Error: function java.lang.String.lastIndexOf (const(char[]) str, char ch) is not callable using argument types (const(char[]),char,ulong)
java/lang/String.d(183): Error: cannot implicitly convert expression (ch) of type char to const(char[])
java/lang/String.d(183): Error: cannot implicitly convert expression (str.length - 1LU) of type ulong to int
java/lang/String.d(189): Error: cannot implicitly convert expression (str.length - 1LU) of type ulong to int
java/lang/String.d(193): Error: cannot implicitly convert expression (lastIndexOf(str[0LU..cast(ulong)(fromIndex + 1)],cast(dchar)ch,cast(CaseSensitive)1)) of type long to int
java/lang/String.d(199): Error: function java.lang.String.lastIndexOf (const(char[]) str, char ch) is not callable using argument types (const(char[]),const(char[]),ulong)
java/lang/String.d(199): Error: cannot implicitly convert expression (str.length - sub.length) of type ulong to int
java/lang/String.d(213): Error: cannot implicitly convert expression (lastIndexOf(str[0LU..to < __dollar ? to : __dollar],sub,cast(CaseSensitive)1)) of type long to int
java/lang/String.d(577): Error: cannot implicitly convert expression (this.str.length) of type ulong to int
java/lang/StringBuffer.d(57): Error: cannot implicitly convert expression (this.buffer.offset) of type ulong to int
java/lang/StringBuffer.d(153): Error: cannot implicitly convert expression (cast(ulong)start + str.length) of type ulong to int
java/lang/System.d(151): Error: cannot implicitly convert expression ((*& x).toHash()) of type ulong to int
java/lang/util.d(79): Error: '__va_argsave_t' is not defined, perhaps you need to import core.vararg; ?
java/lang/util.d(79): Error: function java.lang.util.DwtLogger.trace must import core.vararg to use variadic functions
java/lang/util.d(83): Error: '__va_argsave_t' is not defined, perhaps you need to import core.vararg; ?
java/lang/util.d(83): Error: function java.lang.util.DwtLogger.info must import core.vararg to use variadic functions
java/lang/util.d(87): Error: '__va_argsave_t' is not defined, perhaps you need to import core.vararg; ?
object.Exception@build.d(237): compile error
----------------
/tmp/.rdmd-1000/rdmd-build.d-1A5D519F676749874EA67CBDC0B74281/build(void build.main(immutable(char)[][]).void __lambda2()+0x49) [0x454925]
/tmp/.rdmd-1000/rdmd-build.d-1A5D519F676749874EA67CBDC0B74281/build(_Dmain+0x23ad) [0x4520e5]
/tmp/.rdmd-1000/rdmd-build.d-1A5D519F676749874EA67CBDC0B74281/build(extern (C) int rt.dmain2.main(int, char**).void runMain()+0x1c) [0x46939c]
/tmp/.rdmd-1000/rdmd-build.d-1A5D519F676749874EA67CBDC0B74281/build(extern (C) int rt.dmain2.main(int, char**).void tryExec(scope void delegate())+0x2a) [0x468d16]
/tmp/.rdmd-1000/rdmd-build.d-1A5D519F676749874EA67CBDC0B74281/build(extern (C) int rt.dmain2.main(int, char**).void runAll()+0x3b) [0x4693e3]
/tmp/.rdmd-1000/rdmd-build.d-1A5D519F676749874EA67CBDC0B74281/build(extern (C) int rt.dmain2.main(int, char**).void tryExec(scope void delegate())+0x2a) [0x468d16]
/tmp/.rdmd-1000/rdmd-build.d-1A5D519F676749874EA67CBDC0B74281/build(main+0xd1) [0x468ca1]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f32c2812ead]

[jacob-carlborg]

DWT is so far only 32bit, sorry. The original SWT library has different releases for 32 and 64bit, but I think it should be possible to merge in D. Nevertheless it hasn't been done yet. Contributions are always welcome :)

[ErunamoJAZZ]

humm...
Unfortunately my D knowledge is almost null, and I have not much time to help.
I wanted to use D to do some small GUI, and to experiment with the language, but I could not run or DWT, or wxD. Maybe try gtkD (although not multiplatform).

Thanks for the reply :)

[jacob-carlborg]

If you don't have any special reason to compile your application as 64bit you can add the -m32 flag to DMD when compiling to get a 32bit executable. You would also need the 32bit versions of GCC and the systems libraries needed. On Ubuntu these packages are called "multilib". DWT for Linux depends on at least these packages.

DWT should work perfectly fine on 32bit, otherwise it's a bug and let me know about it.