Setting up the use of this module.

§1. This section simply sets up the module in ways expected by foundation, and contains no code of interest. The following constant exists only in tools which use this module:

define KINDS_MODULE TRUE

§2. Like all modules, this one must define a start and end function:

enumerate KIND_CHANGES_DA 

enumerate KIND_CHECKING_DA 

enumerate KIND_CREATIONS_DA 

enumerate MATCHING_DA 

void KindsModule::start(void) {
    Writers::register_writer('u', &Kinds::Textual::writer);
    Writers::register_logger('Q', Kinds::Dimensions::logger);
    Log::declare_aspect(KIND_CHANGES_DA, U"kind changes", FALSE, TRUE);
    Log::declare_aspect(KIND_CHECKING_DA, U"kind checking", FALSE, FALSE);
    Log::declare_aspect(KIND_CREATIONS_DA, U"kind creations", FALSE, FALSE);
    Log::declare_aspect(MATCHING_DA, U"matching", FALSE, FALSE);
    KindsModule::set_internal_NTIs();
}
void KindsModule::end(void) {
}

§3. A little Preform optimisation:

void KindsModule::set_internal_NTIs(void) {
    NTI::give_nt_reserved_incidence_bit(<k-kind>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-kind-of-kind>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-base-kind>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-kind-construction>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-kind-variable-texts>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-kind-variable>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-formal-variable>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-irregular-kind-construction>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-variable-definition>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-single-term>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-optional-term>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-tupled-term>, COMMON_NOUN_RES_NT_BIT);
    NTI::give_nt_reserved_incidence_bit(<k-tuple-list>, COMMON_NOUN_RES_NT_BIT);
}

§4. Some tools using this module will want to push simple error messages out to the command line; others will want to translate them into elaborate problem texts in HTML. So the client is allowed to define PROBLEM_KINDS_CALLBACK to some routine of her own, gazumping this one.

enumerate DimensionRedundant_KINDERROR 1

enumerate DimensionNotBaseKOV_KINDERROR 

enumerate NonDimensional_KINDERROR 

enumerate ImproperSubtraction_KINDERROR 

enumerate UnitSequenceOverflow_KINDERROR 

enumerate DimensionsInconsistent_KINDERROR 

enumerate KindUnalterable_KINDERROR 

enumerate KindsCircular_KINDERROR 

enumerate KindsCircular2_KINDERROR 

enumerate LPCantScaleYet_KINDERROR 

enumerate LPCantScaleTwice_KINDERROR 

enumerate NeptuneError_KINDERROR 

void KindsModule::problem_handler(int err_no, parse_node *pn, text_stream *E,
    kind *K1, kind *K2) {
    #ifdef PROBLEM_KINDS_CALLBACK
    PROBLEM_KINDS_CALLBACK(err_no, pn, E, K1, K2);
    #endif
    #ifndef PROBLEM_KINDS_CALLBACK
    TEMPORARY_TEXT(text)
    if (pn) WRITE_TO(text, "%+W", Node::get_text(pn));
    if (E) WRITE_TO(text, "%S", E);
    switch (err_no) {
        case DimensionRedundant_KINDERROR:
            Errors::with_text("multiplication rule given twice: %S", text);
            break;
        case DimensionNotBaseKOV_KINDERROR:
            Errors::with_text("multiplication rule too complex: %S", text);
            break;
        case NonDimensional_KINDERROR:
            Errors::with_text("multiplication rule quotes non-numerical kinds: %S", text);
            break;
        case ImproperSubtraction_KINDERROR:
            Errors::with_text("subtraction rules can only subtract a dimensionless kind from itself", text);
            break;
        case UnitSequenceOverflow_KINDERROR:
            Errors::with_text("multiplication rule far too complex: %S", text);
            break;
        case DimensionsInconsistent_KINDERROR:
            Errors::with_text("multiplication rule creates inconsistency: %S", text);
            break;
        case KindUnalterable_KINDERROR:
            Errors::with_text("making this subkind would lead to a contradiction: %S", text);
            break;
        case KindsCircular_KINDERROR:
            Errors::with_text("making this subkind would lead to a circularity: %S", text);
            break;
        case KindsCircular2_KINDERROR:
            Errors::with_text("making this subkind would a kind being its own subkind: %S", text);
            break;
        case LPCantScaleYet_KINDERROR:
            Errors::with_text("tries to scale a value with no point of reference: %S", text);
            break;
        case LPCantScaleTwice_KINDERROR:
            Errors::with_text("tries to scale a value which has already been scaled: %S", text);
            break;
        case NeptuneError_KINDERROR:
            Errors::with_text("error in Neptune file: %S", text);
            break;
        default: internal_error("unimplemented problem message");
    }
    DISCARD_TEXT(text)
    #endif
}