digitalmars.D.bugs - [Issue 19328] New: isExpression does not allow to check conversion
- d-bugmail puremagic.com (30/30) Oct 23 2018 https://issues.dlang.org/show_bug.cgi?id=19328
https://issues.dlang.org/show_bug.cgi?id=19328 Issue ID: 19328 Summary: isExpression does not allow to check conversion to delegate/function Product: D Version: D2 Hardware: x86_64 OS: Linux Status: NEW Severity: enhancement Priority: P1 Component: dlang.org Assignee: nobody puremagic.com Reporter: razvan.nitu1305 gmail.com The grammar allows to check if a type is convertible to a delegate through isExpression [1]. However, compiling this: template ParameterTupleOf( Fn ) { static if( is( Fn Params == function ) ) pragma(msg, "function"); else static if( is( Fn Params == delegate ) ) pragma(msg, "delegate"); else static if( is( Fn Params == Params* ) ) pragma(msg, "pointer"); else static assert( false, "Argument has no parameters." ); } Issues a parsing error. [1] https://dlang.org/spec/grammar.html#IsExpression --
Oct 23 2018