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msg(?Var1, ?Var2, ?MSG)
Computes the most specific generalisation of Var1 and Var2 that is expressible with GFD variables.
- Var1
- A (domain) variable or number
- Var2
- A (domain) variable or number
- MSG
- Most specific generalisation (variable)
Description
The most specific generalisation of two intervals is computed and
returned as MSG. MSG will be the union of the domains of the two
variables, with integers treated as a singleton domain.
If either Var1 or Var2 are domain-less, or have values that cannot be
expressed as domains, MSG remains unbound.
Modes and Determinism
- msg(-, -, ?)
- msg(++, ++, ?)