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inform7/inter/bytecode-module/Chapter 4/The Append Construct.w
2022-02-13 23:44:50 +00:00

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[Inter::Append::] The Append Construct.
Defining the append construct.
@
@e APPEND_IST
=
void Inter::Append::define(void) {
inter_construct *IC = InterConstruct::create_construct(APPEND_IST, I"append");
InterConstruct::specify_syntax(IC, I"append IDENTIFIER TEXT");
InterConstruct::permit(IC, INSIDE_PLAIN_PACKAGE_ICUP);
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);
}
@
@d SYMBOL_APPEND_IFLD 2
@d TEXT_APPEND_IFLD 3
@d EXTENT_APPEND_IFR 4
=
void Inter::Append::read(inter_construct *IC, inter_bookmark *IBM, inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) {
*E = InterConstruct::check_level_in_package(IBM, APPEND_IST, ilp->indent_level, eloc);
if (*E) return;
if (SymbolAnnotation::nonempty(&(ilp->set))) {
*E = Inter::Errors::plain(I"__annotations are not allowed", eloc);
return;
}
inter_symbol *symbol = InterSymbolsTable::symbol_from_name(InterBookmark::scope(IBM), ilp->mr.exp[0]);
if (symbol == NULL) {
*E = Inter::Errors::plain(I"no such symbol", eloc);
return;
}
inter_ti ID = InterWarehouse::create_text(InterBookmark::warehouse(IBM), InterBookmark::package(IBM));
*E = Inter::Constant::parse_text(InterWarehouse::get_text(InterBookmark::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::new_with_2_data_fields(IBM, APPEND_IST, InterSymbolsTable::id_from_symbol_at_bookmark(IBM, symbol), append_text, eloc, level);
inter_error_message *E = InterConstruct::verify_construct(InterBookmark::package(IBM), P); if (E) return E;
NodePlacement::move_to_moving_bookmark(P, IBM);
return NULL;
}
void Inter::Append::verify(inter_construct *IC, inter_tree_node *P, inter_package *owner, inter_error_message **E) {
inter_ti vcount = Inode::bump_verification_count(P);
if (P->W.extent != EXTENT_APPEND_IFR) { *E = Inode::error(P, I"extent wrong", NULL); return; }
inter_symbol *symbol = InterSymbolsTable::symbol_from_ID(InterPackage::scope(owner), P->W.instruction[SYMBOL_APPEND_IFLD]);;
if (symbol == NULL) { *E = Inode::error(P, I"no target name", NULL); return; }
if (P->W.instruction[TEXT_APPEND_IFLD] == 0) { *E = Inode::error(P, I"no translation text", NULL); return; }
if (vcount == 0) {
inter_ti ID = P->W.instruction[TEXT_APPEND_IFLD];
text_stream *S = Inode::ID_to_text(P, ID);
SymbolAnnotation::set_t(P->tree, P->package, symbol, APPEND_IANN, S);
}
}
void Inter::Append::write(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P, inter_error_message **E) {
inter_symbol *symbol = InterSymbolsTable::symbol_from_ID_at_node(P, SYMBOL_APPEND_IFLD);
inter_ti ID = P->W.instruction[TEXT_APPEND_IFLD];
text_stream *S = Inode::ID_to_text(P, ID);
WRITE("append %S \"", InterSymbol::identifier(symbol));
Inter::Constant::write_text(OUT, S);
WRITE("\"");
}