Method Exec

interpreter/interpretable.go:390–420

Exec implements the InterpretableV2 interface method.

(frame *ExecutionFrame)

// Exec implements the InterpretableV2 interface method.
func (and *evalAnd) Exec(frame *ExecutionFrame) ref.Val {
	var err ref.Val = nil
	var unk *types.Unknown
	for _, term := range and.terms {
		val := term.Exec(frame)
		boolVal, ok := val.(types.Bool)
		// short-circuit on false.
		if ok && boolVal == types.False {
			return types.False
		}
		if !ok {
			isUnk := false
			unk, isUnk = types.MaybeMergeUnknowns(val, unk)
			if !isUnk && err == nil {
				if types.IsError(val) {
					err = val
				} else {
					err = types.MaybeNoSuchOverloadErr(val)
				}
				err = types.LabelErrNode(and.id, err)
			}
		}
	}
	if unk != nil {
		return unk
	}
	if err != nil {
		return err
	}
	return types.True
}

// Eval implements the Interpretable interface method.
func (and *evalAnd) Eval(ctx Activation) ref.Val {