c('PL_get_bool_ex')

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PL_get_bool_ex()

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Availability:C-language interface function

bool PL_get_bool_ex(term_t t, int *i)

As PL_get_bool(), but raises a type or instantiation error if t is not a valid boolean value (true, false, on, constoff, 1 or 0). Note that the pointer is to an int because C has no bool type.