Defining the val construct.

§1.

enum VAL_IST

void Inter::Val::define?Usage of Inter::Val::define:
Definition - §3(void) {
    inter_construct *IC = Inter::Defn::create_construct(
        VAL_IST,
        L"val (%i+) (%c+)",
        I"val", I"vals");
    IC->min_level = 1;
    IC->max_level = 100000000;
    IC->usage_permissions = INSIDE_CODE_PACKAGE;
    METHOD_ADD(IC, CONSTRUCT_READ_MTID, Inter::Val::read);
    METHOD_ADD(IC, CONSTRUCT_TRANSPOSE_MTID, Inter::Val::transpose);
    METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, Inter::Val::verify);
    METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, Inter::Val::write);
}

§2.

define BLOCK_VAL_IFLD 2
define KIND_VAL_IFLD 3
define VAL1_VAL_IFLD 4
define VAL2_VAL_IFLD 5
define EXTENT_VAL_IFR 6

void Inter::Val::read?Usage of Inter::Val::read:
§1(inter_construct *IC, inter_bookmark *IBM, inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) {
    if (Inter::Annotations::exist(&(ilp->set))) { *E = Inter::Errors::plain(I"__annotations are not allowed", eloc); return; }

    *E = Inter::Defn::vet_level(IBM, VAL_IST, ilp->indent_level, eloc);
    if (*E) return;

    inter_package *routine = Inter::Defn::get_latest_block_package();
    if (routine == NULL) { *E = Inter::Errors::plain(I"'val' used outside function", eloc); return; }
    inter_symbols_table *locals = Inter::Packages::scope(routine);
    if (locals == NULL) { *E = Inter::Errors::plain(I"function has no symbols table", eloc); return; }

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

    inter_ti val1 = 0;
    inter_ti val2 = 0;

    inter_symbol *kind_as_value = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), ilp->mr.exp[1], KIND_IST, E);
    *E = NULL;
    if (kind_as_value) {
        Inter::Symbols::to_data(Inter::Bookmarks::tree(IBM), Inter::Bookmarks::package(IBM), kind_as_value, &val1, &val2);
    } else {
        *E = Inter::Types::read(ilp->line, eloc, Inter::Bookmarks::tree(IBM), Inter::Bookmarks::package(IBM), val_kind, ilp->mr.exp[1], &val1, &val2, locals);
        if (*E) return;
    }

    *E = Inter::Val::new(IBM, val_kind, ilp->indent_level, val1, val2, eloc);
}

inter_error_message *Inter::Val::new(inter_bookmark *IBM, inter_symbol *val_kind, int level, inter_ti val1, inter_ti val2, inter_error_location *eloc) {
    inter_tree_node *P = Inode::fill_4(IBM, VAL_IST, 0, InterSymbolsTables::id_from_IRS_and_symbol(IBM, val_kind), val1, val2, eloc, (inter_ti) level);
    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::Val::transpose?Usage of Inter::Val::transpose:
§1(inter_construct *IC, inter_tree_node *P, inter_ti *grid, inter_ti grid_extent, inter_error_message **E) {
    P->W.data[VAL2_VAL_IFLD] = Inter::Types::transpose_value(P->W.data[VAL1_VAL_IFLD], P->W.data[VAL2_VAL_IFLD], grid, grid_extent, E);
}

void Inter::Val::verify?Usage of Inter::Val::verify:
§1(inter_construct *IC, inter_tree_node *P, inter_package *owner, inter_error_message **E) {
    if (P->W.extent != EXTENT_VAL_IFR) { *E = Inode::error(P, I"extent wrong", NULL); return; }
    inter_symbols_table *locals = Inter::Packages::scope(owner);
    if (locals == NULL) { *E = Inode::error(P, I"function has no symbols table", NULL); return; }
    *E = Inter::Verify::symbol(owner, P, P->W.data[KIND_VAL_IFLD], KIND_IST); if (*E) return;
    inter_symbol *val_kind = InterSymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[KIND_VAL_IFLD]);
    *E = Inter::Verify::local_value(P, VAL1_VAL_IFLD, val_kind, locals); if (*E) return;
}

void Inter::Val::write?Usage of Inter::Val::write:
§1(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P, inter_error_message **E) {
    inter_symbols_table *locals = Inter::Packages::scope_of(P);
    if (locals == NULL) { *E = Inode::error(P, I"function has no symbols table", NULL); return; }
    inter_symbol *val_kind = InterSymbolsTables::symbol_from_frame_data(P, KIND_VAL_IFLD);
    if (val_kind) {
        WRITE("val %S ", val_kind->symbol_name);
        Inter::Types::write(OUT, P, val_kind, P->W.data[VAL1_VAL_IFLD], P->W.data[VAL2_VAL_IFLD], locals, FALSE);
    } else { *E = Inode::error(P, I"cannot write val", NULL); return; }
}