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108 lines
4 KiB
OpenEdge ABL
108 lines
4 KiB
OpenEdge ABL
[PropertyInstruction::] The Property Construct.
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Defining the property construct.
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@h Definition.
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For what this does and why it is used, see //inter: Textual Inter//.
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=
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void PropertyInstruction::define_construct(void) {
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inter_construct *IC = InterInstruction::create_construct(PROPERTY_IST, I"property");
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InterInstruction::defines_symbol_in_fields(IC, DEFN_PROP_IFLD, TYPE_PROP_IFLD);
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InterInstruction::specify_syntax(IC, I"property TOKENS");
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InterInstruction::data_extent_always(IC, 3);
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InterInstruction::permit(IC, INSIDE_PLAIN_PACKAGE_ICUP);
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METHOD_ADD(IC, CONSTRUCT_READ_MTID, PropertyInstruction::read);
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METHOD_ADD(IC, CONSTRUCT_TRANSPOSE_MTID, PropertyInstruction::transpose);
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METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, PropertyInstruction::verify);
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METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, PropertyInstruction::write);
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}
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@h Instructions.
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In bytecode, the frame of a |property| instruction is laid out with the
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compulsory words -- see //Inter Nodes// -- followed by:
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@d DEFN_PROP_IFLD (DATA_IFLD + 0)
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@d TYPE_PROP_IFLD (DATA_IFLD + 1)
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@d PERM_LIST_PROP_IFLD (DATA_IFLD + 2)
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=
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inter_error_message *PropertyInstruction::new(inter_bookmark *IBM, inter_symbol *prop_s,
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inter_type prop_type, inter_ti level, inter_error_location *eloc) {
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inter_package *pack = InterBookmark::package(IBM);
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inter_warehouse *warehouse = InterBookmark::warehouse(IBM);
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inter_tree_node *P = Inode::new_with_3_data_fields(IBM, PROPERTY_IST,
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/* DEFN_PROP_IFLD: */ InterSymbolsTable::id_at_bookmark(IBM, prop_s),
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/* TYPE_PROP_IFLD: */ InterTypes::to_TID_at(IBM, prop_type),
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/* PERM_LIST_PROP_IFLD: */ InterWarehouse::create_node_list(warehouse, pack),
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eloc, level);
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inter_error_message *E = VerifyingInter::instruction(pack, P);
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if (E) return E;
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NodePlacement::move_to_moving_bookmark(P, IBM);
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return NULL;
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}
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void PropertyInstruction::transpose(inter_construct *IC, inter_tree_node *P,
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inter_ti *grid, inter_ti grid_extent, inter_error_message **E) {
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P->W.instruction[PERM_LIST_PROP_IFLD] = grid[P->W.instruction[PERM_LIST_PROP_IFLD]];
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}
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@ Verification consists only of sanity checks.
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=
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void PropertyInstruction::verify(inter_construct *IC, inter_tree_node *P,
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inter_package *owner, inter_error_message **E) {
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*E = VerifyingInter::TID_field(owner, P, TYPE_PROP_IFLD);
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if (*E) return;
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*E = VerifyingInter::node_list_field(owner, P, PERM_LIST_PROP_IFLD);
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if (*E) return;
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}
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@h Creating from textual Inter syntax.
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=
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void PropertyInstruction::read(inter_construct *IC, inter_bookmark *IBM,
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inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) {
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text_stream *type_text = NULL, *name_text = ilp->mr.exp[0];
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match_results mr = Regexp::create_mr();
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if (Regexp::match(&mr, name_text, L"%((%c+)%) (%c+)")) {
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type_text = mr.exp[0]; name_text = mr.exp[1];
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}
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inter_symbols_table *scope = InterBookmark::scope(IBM);
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inter_symbol *prop_name = TextualInter::new_symbol(eloc, scope, name_text, E);
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inter_type prop_type = InterTypes::unchecked();
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if (*E == NULL) prop_type = InterTypes::parse_simple(scope, eloc, type_text, E);
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Regexp::dispose_of(&mr);
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if (*E) return;
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SymbolAnnotation::copy_set_to_symbol(&(ilp->set), prop_name);
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*E = PropertyInstruction::new(IBM, prop_name, prop_type,
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(inter_ti) ilp->indent_level, eloc);
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}
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@h Writing to textual Inter syntax.
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=
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void PropertyInstruction::write(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P) {
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inter_symbol *prop_name = InterSymbolsTable::symbol_from_ID_at_node(P, DEFN_PROP_IFLD);
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WRITE("property ");
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TextualInter::write_optional_type_marker(OUT, P, TYPE_PROP_IFLD);
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WRITE("%S", InterSymbol::identifier(prop_name));
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}
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@h Access functions.
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=
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inter_symbol *PropertyInstruction::property(inter_tree_node *P) {
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if (P == NULL) return NULL;
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if (Inode::isnt(P, PROPERTY_IST)) return NULL;
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return InterSymbolsTable::symbol_from_ID_at_node(P, DEFN_PROP_IFLD);
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}
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inter_ti PropertyInstruction::permissions_list(inter_symbol *prop_name) {
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if (prop_name == NULL) return 0;
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inter_tree_node *D = InterSymbol::definition(prop_name);
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if (D == NULL) return 0;
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return D->W.instruction[PERM_LIST_PROP_IFLD];
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}
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