guard

<programming>

1. In functional programming, a Boolean expression attached to a function definition specifying when (for what arguments) that definition is appropriate.

2. In (parallel) logic programming, a Boolean expression which is used to select a clause from several alternative matching clauses.

See Guarded Horn Clauses.

3. In parallel languages, a Boolean expression which specifies when an message may be sent or received.

Last updated: 1995-05-09

Nearby terms:

gu ♦ guaranteed scheduling ♦ guard ♦ Guarded Horn Clauses ♦ gubbish

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