Defining the kind construct.

§1.

enum KIND_IST

void Inter::Kind::define?Usage of Inter::Kind::define:
Definition - §3(void) {
    inter_construct *IC = Inter::Defn::create_construct(
        KIND_IST,
        L"kind (%i+) (%c+)",
        I"kind", I"kinds");
    METHOD_ADD(IC, CONSTRUCT_READ_MTID, Inter::Kind::read);
    METHOD_ADD(IC, CONSTRUCT_TRANSPOSE_MTID, Inter::Kind::transpose);
    METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, Inter::Kind::verify);
    METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, Inter::Kind::write);
}

§2.

define DEFN_KIND_IFLD 2
define DATA_TYPE_KIND_IFLD 3
define ENUM_RANGE_KIND_IFLD 4
define NO_INSTANCES_KIND_IFLD 5
define SUPER_KIND_IFLD 6
define PERM_LIST_KIND_IFLD 7
define PLIST_KIND_IFLD 8
define CONSTRUCTOR_KIND_IFLD 9
define OPERANDS_KIND_IFLD 10
define MIN_EXTENT_KIND_IFR 10
enum BASE_ICON from 1
enum LIST_ICON
enum COLUMN_ICON
enum FUNCTION_ICON
enum RELATION_ICON
enum RULE_ICON
enum RULEBOOK_ICON
enum STRUCT_ICON
enum DESCRIPTION_ICON
define MAX_ICON_OPERANDS 128

void Inter::Kind::read?Usage of Inter::Kind::read:
§1(inter_construct *IC, inter_bookmark *IBM, inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) {
    *E = Inter::Defn::vet_level(IBM, KIND_IST, ilp->indent_level, eloc);
    if (*E) return;

    inter_symbol *symb = Inter::Textual::new_symbol(eloc, Inter::Bookmarks::scope(IBM), ilp->mr.exp[0], E);
    if (*E) return;

    match_results mr2 = Regexp::create_mr();
    inter_data_type *idt = NULL;
    int constructor = BASE_ICON;
    int arity = 0;
    inter_ti operands[MAX_ICON_OPERANDS];
    inter_symbol *super_kind = NULL;
    for (int i=0; i<MAX_ICON_OPERANDS; i++) operands[i] = 0;
    if (Regexp::match(&mr2, ilp->mr.exp[1], L"<= (%i+)")) {
        super_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), mr2.exp[0], KIND_IST, E);
        if (*E) return;
        idt = Inter::Kind::data_type(super_kind);
        if (Inter::Types::is_enumerated(idt) == FALSE)
            { *E = Inter::Errors::quoted(I"not a kind which can have subkinds", mr2.exp[0], eloc); return; }
    } else if (Regexp::match(&mr2, ilp->mr.exp[1], L"rulebook of (%i+)")) {
        idt = Inter::Textual::data_type(eloc, I"list", E);
        if (*E) return;
        constructor = RULEBOOK_ICON;
        inter_symbol *conts_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), mr2.exp[0], KIND_IST, E);
        if (*E) return;
        operands[0] = Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, conts_kind); arity = 1;
    } else if (Regexp::match(&mr2, ilp->mr.exp[1], L"list of (%i+)")) {
        idt = Inter::Textual::data_type(eloc, I"list", E);
        if (*E) return;
        constructor = LIST_ICON;
        inter_symbol *conts_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), mr2.exp[0], KIND_IST, E);
        if (*E) return;
        operands[0] = Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, conts_kind); arity = 1;
    } else if (Regexp::match(&mr2, ilp->mr.exp[1], L"relation of (%i+) to (%i+)")) {
        idt = Inter::Textual::data_type(eloc, I"relation", E);
        if (*E) return;
        constructor = RELATION_ICON;
        inter_symbol *X_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), mr2.exp[0], KIND_IST, E);
        if (*E) return;
        inter_symbol *Y_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), mr2.exp[1], KIND_IST, E);
        if (*E) return;
        operands[0] = Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, X_kind);
        operands[1] = Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, Y_kind);
        arity = 2;
    } else if (Regexp::match(&mr2, ilp->mr.exp[1], L"column of (%i+)")) {
        idt = Inter::Textual::data_type(eloc, I"column", E);
        if (*E) return;
        constructor = COLUMN_ICON;
        inter_symbol *conts_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), mr2.exp[0], KIND_IST, E);
        if (*E) return;
        operands[0] = Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, conts_kind); arity = 1;
    } else if (Regexp::match(&mr2, ilp->mr.exp[1], L"description of (%i+)")) {
        idt = Inter::Textual::data_type(eloc, I"description", E);
        if (*E) return;
        constructor = DESCRIPTION_ICON;
        inter_symbol *conts_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), mr2.exp[0], KIND_IST, E);
        if (*E) return;
        operands[0] = Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, conts_kind); arity = 1;
    } else if ((Regexp::match(&mr2, ilp->mr.exp[1], L"(function) (%c+) -> (%i+)")) ||
            (Regexp::match(&mr2, ilp->mr.exp[1], L"(rule) (%c+) -> (%i+)"))) {
        idt = Inter::Textual::data_type(eloc, I"routine", E);
        if (*E) return;
        if (Str::eq(mr2.exp[0], I"function")) constructor = FUNCTION_ICON;
        else constructor = RULE_ICON;
        text_stream *from = mr2.exp[1];
        text_stream *to = mr2.exp[2];
        if (Str::eq(from, I"void")) {
            if (arity >= MAX_ICON_OPERANDS) { *E = Inter::Errors::plain(I"too many args", eloc); return; }
            operands[arity++] = 0;
        } else {
            match_results mr3 = Regexp::create_mr();
            while (Regexp::match(&mr3, from, L" *(%i+) *(%c*)")) {
                inter_symbol *arg_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), mr3.exp[0], KIND_IST, E);
                if (*E) return;
                Str::copy(from, mr3.exp[1]);
                if (arity >= MAX_ICON_OPERANDS) { *E = Inter::Errors::plain(I"too many args", eloc); return; }
                operands[arity++] = Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, arg_kind);
            }
        }
        if (Str::eq(to, I"void")) {
            if (arity >= MAX_ICON_OPERANDS) { *E = Inter::Errors::plain(I"too many args", eloc); return; }
            operands[arity++] = 0;
        } else {
            inter_symbol *res_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), to, KIND_IST, E);
            if (*E) return;
            if (arity >= MAX_ICON_OPERANDS) { *E = Inter::Errors::plain(I"too many args", eloc); return; }
            operands[arity++] = Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, res_kind);
        }
    } else if (Regexp::match(&mr2, ilp->mr.exp[1], L"struct (%c+)")) {
        idt = Inter::Textual::data_type(eloc, I"struct", E);
        if (*E) return;
        constructor = STRUCT_ICON;
        text_stream *elements = mr2.exp[0];
        match_results mr3 = Regexp::create_mr();
        while (Regexp::match(&mr3, elements, L" *(%i+) *(%c*)")) {
            inter_symbol *arg_kind = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), mr3.exp[0], KIND_IST, E);
            if (*E) return;
            Str::copy(elements, mr3.exp[1]);
            if (arity >= MAX_ICON_OPERANDS) { *E = Inter::Errors::plain(I"too many args", eloc); return; }
            operands[arity++] = Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, arg_kind);
        }
    } else {
        idt = Inter::Textual::data_type(eloc, ilp->mr.exp[1], E);
        if (*E) return;
    }
    if (idt == NULL) internal_error("null IDT");

    *E = Inter::Kind::new(IBM, Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, symb), idt->type_ID,
        (super_kind)?(Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, super_kind)):0,
        constructor, arity, operands, (inter_ti) ilp->indent_level, eloc);
}

inter_error_message *Inter::Kind::new(inter_bookmark *IBM, inter_ti SID, inter_ti TID, inter_ti SUP,
    int constructor, int arity, inter_ti *operands, inter_ti level, inter_error_location *eloc) {
    inter_warehouse *warehouse = Inter::Bookmarks::warehouse(IBM);
    inter_ti L1 = Inter::Warehouse::create_frame_list(warehouse);
    inter_ti L2 = Inter::Warehouse::create_frame_list(warehouse);
    Inter::Warehouse::attribute_resource(warehouse, L1, Inter::Bookmarks::package(IBM));
    Inter::Warehouse::attribute_resource(warehouse, L2, Inter::Bookmarks::package(IBM));
    inter_tree_node *P = Inode::fill_8(IBM,
        KIND_IST, SID, TID, 0, 0, SUP, L1, L2,
        (inter_ti) constructor, eloc, level);
    if (arity > 0) {
        if (Inode::extend(P, (inter_ti) arity) == FALSE)
            return Inter::Errors::plain(I"can't extend", eloc);
        for (int i=0; i<arity; i++) P->W.data[OPERANDS_KIND_IFLD+i] = operands[i];
    }
    inter_error_message *E = Inter::Defn::verify_construct(Inter::Bookmarks::package(IBM), P); if (E) return E;
    Inter::Bookmarks::insert(IBM, P);
    return NULL;
}

void Inter::Kind::transpose?Usage of Inter::Kind::transpose:
§1(inter_construct *IC, inter_tree_node *P, inter_ti *grid, inter_ti grid_extent, inter_error_message **E) {
    P->W.data[PERM_LIST_KIND_IFLD] = grid[P->W.data[PERM_LIST_KIND_IFLD]];
    P->W.data[PLIST_KIND_IFLD] = grid[P->W.data[PLIST_KIND_IFLD]];
}

void Inter::Kind::verify?Usage of Inter::Kind::verify:
§1(inter_construct *IC, inter_tree_node *P, inter_package *owner, inter_error_message **E) {
    if (P->W.extent < MIN_EXTENT_KIND_IFR) { *E = Inode::error(P, I"extent wrong", NULL); return; }
    *E = Inter::Verify::defn(owner, P, DEFN_KIND_IFLD); if (*E) return;
    *E = Inter::Verify::data_type(P, DATA_TYPE_KIND_IFLD); if (*E) return;
    if (P->W.data[ENUM_RANGE_KIND_IFLD] != 0) {
        inter_symbol *the_kind = Inter::SymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[DEFN_KIND_IFLD]);
        if ((the_kind == NULL) ||
            (Inter::Types::is_enumerated(Inter::Types::find_by_ID(P->W.data[DATA_TYPE_KIND_IFLD])) == FALSE))
            { *E = Inode::error(P, I"spurious extent in non-enumeration", NULL); return; }
    }
    if (P->W.data[SUPER_KIND_IFLD] != 0) {
        *E = Inter::Verify::symbol(owner, P, P->W.data[SUPER_KIND_IFLD], KIND_IST); if (*E) return;
        inter_symbol *super_kind = Inter::SymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[SUPER_KIND_IFLD]);
        if (Inter::Types::is_enumerated(Inter::Kind::data_type(super_kind)) == FALSE)
            { *E = Inode::error(P, I"subkind of nonenumerated kind", NULL); return; }
    }
    int arity = P->W.extent - MIN_EXTENT_KIND_IFR;
    switch (P->W.data[CONSTRUCTOR_KIND_IFLD]) {
        case BASE_ICON: if (arity != 0) { *E = Inode::error(P, I"spurious kc operand", NULL); return; }
            break;
        case LIST_ICON:
        case RULEBOOK_ICON:
            if (arity != 1) { *E = Inode::error(P, I"wrong list arity", NULL); return; }
            if (P->W.data[OPERANDS_KIND_IFLD] == 0) { *E = Inode::error(P, I"no listed kind", NULL); return; }
            *E = Inter::Verify::symbol(owner, P, P->W.data[OPERANDS_KIND_IFLD], KIND_IST); if (*E) return;
            break;
        case COLUMN_ICON: if (arity != 1) { *E = Inode::error(P, I"wrong col arity", NULL); return; }
            if (P->W.data[OPERANDS_KIND_IFLD] == 0) { *E = Inode::error(P, I"no listed kind", NULL); return; }
            *E = Inter::Verify::symbol(owner, P, P->W.data[OPERANDS_KIND_IFLD], KIND_IST); if (*E) return;
            break;
        case DESCRIPTION_ICON: if (arity != 1) { *E = Inode::error(P, I"wrong desc arity", NULL); return; }
            if (P->W.data[OPERANDS_KIND_IFLD] == 0) { *E = Inode::error(P, I"no listed kind", NULL); return; }
            *E = Inter::Verify::symbol(owner, P, P->W.data[OPERANDS_KIND_IFLD], KIND_IST); if (*E) return;
            break;
        case RELATION_ICON: if (arity != 2) { *E = Inode::error(P, I"wrong relation arity", NULL); return; }
            if (P->W.data[OPERANDS_KIND_IFLD] == 0) { *E = Inode::error(P, I"no listed kind", NULL); return; }
            *E = Inter::Verify::symbol(owner, P, P->W.data[OPERANDS_KIND_IFLD], KIND_IST); if (*E) return;
            if (P->W.data[OPERANDS_KIND_IFLD+1] == 0) { *E = Inode::error(P, I"no listed kind", NULL); return; }
            *E = Inter::Verify::symbol(owner, P, P->W.data[OPERANDS_KIND_IFLD+1], KIND_IST); if (*E) return;
            break;
        case FUNCTION_ICON:
        case RULE_ICON:
            if (arity < 2) { *E = Inode::error(P, I"function arity too low", NULL); return; }
            for (int i=0; i<arity; i++) {
                if (P->W.data[OPERANDS_KIND_IFLD + i] == 0) {
                    if (!(((i == 0) && (arity == 2)) || (i == arity - 1)))
                        { *E = Inode::error(P, I"no listed kind", NULL); return; }
                } else {
                    *E = Inter::Verify::symbol(owner, P, P->W.data[OPERANDS_KIND_IFLD + i], KIND_IST);
                    if (*E) return;
                }
            }
            break;
        case STRUCT_ICON:
            if (arity == 0) { *E = Inode::error(P, I"struct arity too low", NULL); return; }
            for (int i=0; i<arity; i++) {
                *E = Inter::Verify::symbol(owner, P, P->W.data[OPERANDS_KIND_IFLD + i], KIND_IST);
                if (*E) return;
            }
            break;
        default: { *E = Inode::error(P, I"unknown constructor", NULL); return; }
    }
}

inter_ti Inter::Kind::permissions_list?Usage of Inter::Kind::permissions_list:
The PropertyValue Construct - §2
The Permission Construct - §2(inter_symbol *kind_symbol) {
    if (kind_symbol == NULL) return 0;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return 0;
    return D->W.data[PERM_LIST_KIND_IFLD];
}

inter_ti Inter::Kind::properties_list?Usage of Inter::Kind::properties_list:
The PropertyValue Construct - §2(inter_symbol *inst_name) {
    if (inst_name == NULL) return 0;
    inter_tree_node *D = Inter::Symbols::definition(inst_name);
    if (D == NULL) return 0;
    return D->W.data[PLIST_KIND_IFLD];
}

void Inter::Kind::write?Usage of Inter::Kind::write:
§1(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P, inter_error_message **E) {
    inter_symbol *symb = Inter::SymbolsTables::symbol_from_frame_data(P, DEFN_KIND_IFLD);
    inter_data_type *idt = Inter::Types::find_by_ID(P->W.data[DATA_TYPE_KIND_IFLD]);
    if ((symb) && (idt)) {
        WRITE("kind %S ", symb->symbol_name);
        if (P->W.data[SUPER_KIND_IFLD]) {
            inter_symbol *super = Inter::SymbolsTables::symbol_from_frame_data(P, SUPER_KIND_IFLD);
            WRITE("<= %S", super->symbol_name);
        } else {
            switch (P->W.data[CONSTRUCTOR_KIND_IFLD]) {
                case BASE_ICON: WRITE("%S", idt->reserved_word); break;
                case LIST_ICON: {
                    inter_symbol *conts_kind = Inter::SymbolsTables::symbol_from_frame_data(P, OPERANDS_KIND_IFLD);
                    WRITE("list of %S", conts_kind->symbol_name);
                    break;
                }
                case RULEBOOK_ICON: {
                    inter_symbol *conts_kind = Inter::SymbolsTables::symbol_from_frame_data(P, OPERANDS_KIND_IFLD);
                    WRITE("rulebook of %S", conts_kind->symbol_name);
                    break;
                }
                case COLUMN_ICON: {
                    inter_symbol *conts_kind = Inter::SymbolsTables::symbol_from_frame_data(P, OPERANDS_KIND_IFLD);
                    WRITE("column of %S", conts_kind->symbol_name);
                    break;
                }
                case DESCRIPTION_ICON: {
                    inter_symbol *conts_kind = Inter::SymbolsTables::symbol_from_frame_data(P, OPERANDS_KIND_IFLD);
                    WRITE("description of %S", conts_kind->symbol_name);
                    break;
                }
                case RELATION_ICON: {
                    inter_symbol *X_kind = Inter::SymbolsTables::symbol_from_frame_data(P, OPERANDS_KIND_IFLD);
                    inter_symbol *Y_kind = Inter::SymbolsTables::symbol_from_frame_data(P, OPERANDS_KIND_IFLD+1);
                    WRITE("relation of %S to %S", X_kind->symbol_name, Y_kind->symbol_name);
                    break;
                }
                case FUNCTION_ICON:
                case RULE_ICON: {
                    if (P->W.data[CONSTRUCTOR_KIND_IFLD] == FUNCTION_ICON)
                        WRITE("function");
                    else
                        WRITE("rule");
                    int arity = P->W.extent - MIN_EXTENT_KIND_IFR;
                    for (int i=0; i<arity; i++) {
                        WRITE(" ");
                        if (i == arity - 1) WRITE("-> ");
                        if (P->W.data[OPERANDS_KIND_IFLD + i] == 0) {
                            WRITE("void");
                        } else {
                            inter_symbol *K = Inter::SymbolsTables::symbol_from_frame_data(P, OPERANDS_KIND_IFLD + i);
                            WRITE("%S", K->symbol_name);
                        }
                    }
                    break;
                }
                case STRUCT_ICON: {
                    WRITE("struct");
                    int arity = P->W.extent - MIN_EXTENT_KIND_IFR;
                    for (int i=0; i<arity; i++) {
                        inter_symbol *K = Inter::SymbolsTables::symbol_from_frame_data(P, OPERANDS_KIND_IFLD + i);
                        WRITE(" %S", K->symbol_name);
                    }
                    break;
                }
                default: { *E = Inode::error(P, I"cannot write kind", NULL); return; }
                    break;
            }
        }
    } else { *E = Inode::error(P, I"cannot write kind", NULL); return; }
    Inter::Symbols::write_annotations(OUT, P, symb);
}

void Inter::Kind::new_instance?Usage of Inter::Kind::new_instance:
The Instance Construct - §2(inter_symbol *kind_symbol, inter_symbol *inst_name) {
    if (kind_symbol == NULL) return;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return;
    D->W.data[NO_INSTANCES_KIND_IFLD]++;
    inter_symbol *S = Inter::Kind::super(kind_symbol);
    if (S) Inter::Kind::new_instance(S, inst_name);
}

int Inter::Kind::instance_count(inter_symbol *kind_symbol) {
    if (kind_symbol == NULL) return 0;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return 0;
    return (int) D->W.data[NO_INSTANCES_KIND_IFLD];
}

int Inter::Kind::constructor?Usage of Inter::Kind::constructor:
The Constant Construct - §2(inter_symbol *kind_symbol) {
    if (kind_symbol == NULL) return 0;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return 0;
    return (int) D->W.data[CONSTRUCTOR_KIND_IFLD];
}

int Inter::Kind::arity?Usage of Inter::Kind::arity:
The Constant Construct - §2(inter_symbol *kind_symbol) {
    if (kind_symbol == NULL) return 0;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return 0;
    return D->W.extent - MIN_EXTENT_KIND_IFR;
}

inter_symbol *Inter::Kind::operand_symbol?Usage of Inter::Kind::operand_symbol:
The Constant Construct - §2(inter_symbol *kind_symbol, int i) {
    if (kind_symbol == NULL) return NULL;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return NULL;
    if (i >= D->W.extent - MIN_EXTENT_KIND_IFR) return NULL;
    inter_ti CID = D->W.data[OPERANDS_KIND_IFLD + i];
    inter_symbols_table *T = Inter::Packages::scope_of(D);
    return Inter::SymbolsTables::symbol_from_id(T, CID);
}

inter_data_type *Inter::Kind::data_type?Usage of Inter::Kind::data_type:
Inter Data Types - §2, §3
The Constant Construct - §2
The Instance Construct - §2
The Permission Construct - §2(inter_symbol *kind_symbol) {
    if (kind_symbol == NULL) return NULL;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return NULL;
    return Inter::Types::find_by_ID(D->W.data[DATA_TYPE_KIND_IFLD]);
}

inter_ti Inter::Kind::next_enumerated_value?Usage of Inter::Kind::next_enumerated_value:
The Instance Construct - §2(inter_symbol *kind_symbol) {
    if (kind_symbol == NULL) return 0;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return 0;
    return ++(D->W.data[ENUM_RANGE_KIND_IFLD]);
}

inter_symbol *Inter::Kind::super?Usage of Inter::Kind::super:
The PropertyValue Construct - §2(inter_symbol *kind_symbol) {
    if (kind_symbol == NULL) return NULL;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return NULL;
    return Inter::SymbolsTables::symbol_from_frame_data(D, SUPER_KIND_IFLD);
}

int Inter::Kind::is?Usage of Inter::Kind::is:
Transmigration - §3.3
The Constant Construct - §2
The PropertyValue Construct - §2
The Permission Construct - §2(inter_symbol *kind_symbol) {
    if (kind_symbol == NULL) return FALSE;
    inter_tree_node *D = Inter::Symbols::definition(kind_symbol);
    if (D == NULL) return FALSE;
    if (D->W.data[ID_IFLD] == KIND_IST) return TRUE;
    return FALSE;
}

int Inter::Kind::is_a?Usage of Inter::Kind::is_a:
Inter Data Types - §2, §3(inter_symbol *K1, inter_symbol *K2) {
    inter_data_type *idt1 = Inter::Kind::data_type(K1);
    inter_data_type *idt2 = Inter::Kind::data_type(K2);
    if ((idt1 == unchecked_idt) || (idt2 == unchecked_idt)) return TRUE;
    while (K1) {
        if (K1 == K2) return TRUE;
        K1 = Inter::Kind::super(K1);
    }
    return FALSE;
}