Check that the var keyword is supported in the following contexts
* Module ports (both ANSI and non-ANSI)
* Module variable declarations
* Package variable declarations
* Task and function ports
* block variable declarations
* for loop variable declarations
Also check that it is an error to use the var keyword in a for loop without
an explicit data type, as that is not allowed by the standard.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Lars-Peter Clausen