RE: [sv-ec] scope of enumerated type names

Hi James,

Enum names are declared in the same scope as the enumeration type, so
yes you can reuse names in different scopes. That also means you can't
reuse names in the same scope. For example

class A;
    typedef enum {low, high} A_enum;
    typedef enum {low, hi} B_enum; // illegal - low is already declared
    int low; // also illegal - the identifier 'low' is already declared
in this scope
endclass

The LRM does have a problem that was recently mentioned

class A;
    typedef enum {low, high} A_enum;
     A_enum a_e;
 endclass
 
 class B;
    typedef enum {high, low} B_enum;
    B_enum b_e;
 endclass

A a;
B b;
initial begin
            a = new; b=new;
        a.a_e = low;
        b.b_e = low;
end

Some tools will "do the right thing" but there are no rules in the LRM
that make this legal; low is not a visible identifier.

Dave

> -----Original Message-----
> From: owner-sv-ec@eda.org [mailto:owner-sv-ec@eda.org] On Behalf Of
James
> Keithan
> Sent: Friday, May 21, 2010 1:56 PM
> To: sv-ec@eda.org
> Subject: [sv-ec] scope of enumerated type names
>
>
> Language Folks,
> What are the scoping rules for names in enumerated types?
>
> Can you use the same name in different scopes?
>
> class A;
> typedef enum {low, high} A_enum;
> endclass
>
> class B;
> typedef enum {low, high} B_enum;
> endclass
>
>
> Legal or not?
>
> James
>
>
>
> --
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