Make const, immutable, inout, and shared illegal as function attributes on the left-hand side of a function

[Daniel Murphy via Digitalmars-d]

"John Colvin"  wrote in message news:ljjtmnnckwzenvhawawx at forum.dlang.org...

> [2] By easily managed I don't mean sed-able, or even tooling-fixable. For 
> me it pivots on being able to maintain one code-base that will compile 
> with multiple compiler versions. An example where this fails: @nogc, being 
> an attribute, isn't aliasable, meaning you can't version it out neatly.

There is nothing stopping you from not supporting @nogc until your oldest 
supported dmd version has it.  I agree with your requirement, but this is 
not a good example of it.  A better example would be requiring nothrow 
annotations on inline asm blocks, because the old code won't compile with 
newer dmds and the new code won't compile with older ones.