Bug 1371 – Compiler rejects valid delegate.

// The compiler tries to parse this as a struct initializer. auto foo = { while (doSomething()){} }; // Error: expression expected, not 'while' There are several workarounds to this. auto foo = { while (doSomething()){;} }; // Insert a semicolon somewhere. auto foo = (){ while (doSomething()){} }; // Add a ParameterList. auto foo = delegate void (){ while (doSomething()){} }; // A full delegate expression.

string delegate() dg = { return "dg"; }; //Error: functions cannot return static array invariant char[2u] //Error: cannot implicitly convert expression (__dgliteral1) of type int delegate() to const(char)[] delegate() string delegate() dg = { return cast(string) "dg"; }; //OK //string delegate() dg = delegate string() { return "dg"; }; //OK //auto dg = { return "dg".dup; }; //OK

Follwing still fails in trunk dmd 2.054 (d36b3b12fc4814e59f3a0d680b8700e787b1ceff). auto foo = { while (doSomething()){} }; Workarounds are as same.

Still fails in git HEAD (2.067a). :-(

2.076.1 to 2.079.1: Failure with output: ----- onlineapp.d(4): Error: expression expected, not `while` onlineapp.d(4): Error: comma expected separating field initializers onlineapp.d(7): Deprecation: use `{ }` for an empty statement, not `;` ----- Since 2.080.1: Success with output: onlineapp.d(7): Deprecation: use `{ }` for an empty statement, not `;`