Defining the append construct.

§1.

enum APPEND_IST

void Inter::Append::define?Usage of Inter::Append::define:
Definition - §3(void) {
    inter_construct *IC = Inter::Defn::create_construct(
        APPEND_IST,
        L"append (%i+) \"(%c+)\"",
        I"append", I"appends");
    METHOD_ADD(IC, CONSTRUCT_READ_MTID, Inter::Append::read);
    METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, Inter::Append::verify);
    METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, Inter::Append::write);
}

§2.

define SYMBOL_APPEND_IFLD 2
define TEXT_APPEND_IFLD 3
define EXTENT_APPEND_IFR 4

void Inter::Append::read?Usage of Inter::Append::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, APPEND_IST, ilp->indent_level, eloc);
    if (*E) return;

    if (Inter::Annotations::exist(&(ilp->set))) {
        *E = Inter::Errors::plain(I"__annotations are not allowed", eloc);
        return;
    }

    inter_symbol *symbol = InterSymbolsTables::symbol_from_name(Inter::Bookmarks::scope(IBM), ilp->mr.exp[0]);
    if (symbol == NULL) {
        *E = Inter::Errors::plain(I"no such symbol", eloc);
        return;
    }

    inter_ti ID = Inter::Warehouse::create_text(Inter::Bookmarks::warehouse(IBM), Inter::Bookmarks::package(IBM));
    *E = Inter::Constant::parse_text(Inter::Warehouse::get_text(Inter::Bookmarks::warehouse(IBM), ID), ilp->mr.exp[1], 0, Str::len(ilp->mr.exp[1]), eloc);
    if (*E) return;

    *E = Inter::Append::new(IBM, symbol, ID, (inter_ti) ilp->indent_level, eloc);
}

inter_error_message *Inter::Append::new(inter_bookmark *IBM, inter_symbol *symbol, inter_ti append_text, inter_ti level, struct inter_error_location *eloc) {
    inter_tree_node *P = Inode::fill_2(IBM, APPEND_IST, InterSymbolsTables::id_from_IRS_and_symbol(IBM, symbol), append_text, eloc, 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::Append::verify?Usage of Inter::Append::verify:
§1(inter_construct *IC, inter_tree_node *P, inter_package *owner, inter_error_message **E) {
    inter_ti vcount = Inode::vcount(P);

    if (P->W.extent != EXTENT_APPEND_IFR) { *E = Inode::error(P, I"extent wrong", NULL); return; }
    inter_symbol *symbol = InterSymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[SYMBOL_APPEND_IFLD]);;
    if (symbol == NULL) { *E = Inode::error(P, I"no target name", NULL); return; }
    if (P->W.data[TEXT_APPEND_IFLD] == 0) { *E = Inode::error(P, I"no translation text", NULL); return; }

    if (vcount == 0) {
        inter_ti ID = P->W.data[TEXT_APPEND_IFLD];
        text_stream *S = Inode::ID_to_text(P, ID);
        Inter::Symbols::annotate_t(P->tree, P->package, symbol, APPEND_IANN, S);
    }
}

void Inter::Append::write?Usage of Inter::Append::write:
§1(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P, inter_error_message **E) {
    inter_symbol *symbol = InterSymbolsTables::symbol_from_frame_data(P, SYMBOL_APPEND_IFLD);
    inter_ti ID = P->W.data[TEXT_APPEND_IFLD];
    text_stream *S = Inode::ID_to_text(P, ID);
    WRITE("append %S \"", symbol->symbol_name);
    Inter::Constant::write_text(OUT, S);
    WRITE("\"");
}