D Language / DLang 2.100.0 released

D Language / DLang 2.100.0 has been officially released. This release contains 22 major changes and 179 fixed Bugzilla issues.

major changes

• Improve  C++ header gen
• @mustuseNew property that enforces return type error checking
• Support for contract invariant version identifiers
• Add  .tupleof  property to static array
• Zlib updated to 1.2.12
• std.functional  introduces a new function  bind
• Introducing non-transitive inout returns, and more improvements

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Import D code modules in C source using ImportC

As of D 2.099.0, __import D code modules can be imported directly into C files via keywords.

// dsayhello.d
import core.stdc.stdio : puts;

extern(C) void helloImport() {
    puts("Hello __import!");
}

// dhelloimport.c
__import dsayhello;
__import core.stdc.stdio : puts;

int main(int argc, char** argv) {
    helloImport();
    puts("Cool, eh?");
    return 0;
}

Compile with the following code:

dmd dhelloimport.c dsayhello.d

It is also possible to import C code modules that have been compiled with ImportC:

// csayhello.c
__import core.stdc.stdio : puts;

void helloImport() {
    puts("Hello _import!");
}

// chelloimport.c
__import csayhello;
__import core.stdc.stdio : puts;

int main(int argc, char** argv) {
    helloImport();
    puts("Cool, eh?");
    return 0;
}

Compile with the following code:

dmd chelloimport.c csayhello.c

Introduce throw expressions

In the life cycle of the D language, it throw is a statement (statement) and cannot be used in an expression, because the expression must have a type, and since it does not return a value, there is no suitable type, which makes it impossible to use the following syntax. throw 

(string err) => throw new Exception(err);

Only the following schemes can be used:

(string err) { throw new Exception(err); }

However, as of D 2.099.0, the following code snippet compiles:

void foo(int function() f) {}

void main() {
    foo(() => throw new Exception());
}

See Changelog for details .