d插件构造器
import std.array, std.exception, std.stdio;
mixin template RealizeException() {
this(string msg, string file = __FILE__, size_t line = __LINE__) {
super(msg, file, line);
}
}//插件构造器.
class WrongUsage : Exception {
mixin RealizeException;
this(string[] messages, string file = __FILE__, size_t line = __LINE__) {
auto msg = std.array.join(messages, "\n");
super(msg, file, line);
}
}
void main() {
throw new WrongUsage("Error message.");
}
不工作,替换为真实
,工作.
链接
类似这样:
mixin template methodMix()
{
void foo(int n) { }
}
mixin template operatorMix()
{
void opBinary(string op)(int n) { }
}
mixin template ctorMix()
{
this(int n) { }
}
struct MethodTest
{
mixin methodMix mix;
alias foo = mix.foo;
void foo(string s) { }
}
struct OperatorTest
{
mixin operatorMix mix;
alias opBinary = mix.opBinary;
void opBinary(string op)(string s) { } // [1]
}
struct CtorTest
{
mixin ctorMix mix;
//alias this = mix.this;//行不行?
this(string s) { }
}
void main()
{
MethodTest mt;
mt.foo(3);
OperatorTest ot;
ot + 3;
auto ct = CtorTest(3); // [2]
}
如果按正确顺序,你可这样:
alias __ctor = mixin_thing.__ctor;
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