Libzypp/Design/Relation/Operator

Relational operators

Relational operators are now named:

Rel::EQ
Rel::NE
Rel::LT
...

Rel is used the same way as if it was an enum

Rel opvar;
opvar = Rel::LT;

Only if you use it in a switch statement, it's a bit different. Code example is in docs.

Plus:

• Rel is constructible from a string (throws on illegal value)

Rel opvar( "==" );
Rel opvar( "EQ" );
Rel opvar( "eq" );

• Conversion into string via asString(). Uses the "==" form.

• Wrapped in a namespace (Rel::EQ not simply EQ) it prevents name clashes.

• No promotion to numerical types (as the compiler does for enum values). I.e. you can't use it as int, and the compiler can't do it either.

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Last edit in Trac '11/23/05 10:49:55' by 'kkaempf'

Last edit in Trac '11/23/05 10:49:55' by 'kkaempf'

Last edit in Trac '11/23/05 10:49:55' by 'kkaempf'

Last edit in Trac '11/23/05 10:49:55' by 'kkaempf'

Last edit in Trac '11/23/05 10:49:55' by 'kkaempf'