When we introduce block scoping, using variables declared in a more
narrow scope from a block with wider scope will fail. Warn about
these so people can avoid it and fix their code.
This introduces a new diagnostic (suspicious_assignment) which
issues when an the compiler finds an assignment either where a
condition is expected or as the parameter to return.
This commit introduces a new Aul directive "#warning", which can be used
to enable or disable warnings for a particular piece of code.
"#warning enable" enables all warnings.
"#warning disable" disables all warnings.
"#warning enable empty_parameter_in_call" selectively enables one
specific warning while not affecting any other.
All warnings that used to be controlled by Developer.ExtraWarnings
remain disabled by default.
Nicolas Hake