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71 lines
3 KiB
OpenEdge ABL
71 lines
3 KiB
OpenEdge ABL
[LabInstruction::] The Lab Construct.
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Defining the Lab construct.
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@
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=
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void LabInstruction::define_construct(void) {
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inter_construct *IC = InterInstruction::create_construct(LAB_IST, I"lab");
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InterInstruction::specify_syntax(IC, I"lab .IDENTIFIER");
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InterInstruction::fix_instruction_length_between(IC, EXTENT_LAB_IFR, EXTENT_LAB_IFR);
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InterInstruction::allow_in_depth_range(IC, 1, INFINITELY_DEEP);
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InterInstruction::permit(IC, INSIDE_CODE_PACKAGE_ICUP);
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METHOD_ADD(IC, CONSTRUCT_READ_MTID, LabInstruction::read);
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METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, LabInstruction::verify);
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METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, LabInstruction::write);
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}
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@
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@d BLOCK_LAB_IFLD 2
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@d LABEL_LAB_IFLD 3
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@d EXTENT_LAB_IFR 4
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=
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void LabInstruction::read(inter_construct *IC, inter_bookmark *IBM, inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) {
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inter_package *routine = InterBookmark::package(IBM);
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if (routine == NULL) { *E = InterErrors::plain(I"'lab' used outside function", eloc); return; }
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inter_symbols_table *locals = InterPackage::scope(routine);
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if (locals == NULL) { *E = InterErrors::plain(I"function has no symbols table", eloc); return; }
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inter_symbol *label = InterSymbolsTable::symbol_from_name(locals, ilp->mr.exp[0]);
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if (label == NULL) {
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label = TextualInter::new_symbol(eloc, locals, ilp->mr.exp[0], E);
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if (*E) return;
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InterSymbol::make_label(label);
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}
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if (InterSymbol::is_label(label) == FALSE) { *E = InterErrors::plain(I"not a label", eloc); return; }
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*E = LabInstruction::new(IBM, label, (inter_ti) ilp->indent_level, eloc);
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}
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inter_error_message *LabInstruction::new(inter_bookmark *IBM, inter_symbol *label, inter_ti level, inter_error_location *eloc) {
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inter_tree_node *P = Inode::new_with_2_data_fields(IBM, LAB_IST, 0, InterSymbolsTable::id_at_bookmark(IBM, label), eloc, (inter_ti) level);
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inter_error_message *E = VerifyingInter::instruction(InterBookmark::package(IBM), P); 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 LabInstruction::verify(inter_construct *IC, inter_tree_node *P, inter_package *owner, inter_error_message **E) {
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inter_symbol *label = InterSymbolsTable::symbol_from_ID_in_package(owner, P->W.instruction[LABEL_LAB_IFLD]);
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if (InterSymbol::is_label(label) == FALSE) { *E = Inode::error(P, I"no such label", NULL); return; }
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}
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void LabInstruction::write(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P, inter_error_message **E) {
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inter_package *pack = InterPackage::container(P);
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inter_symbol *label = InterSymbolsTable::symbol_from_ID_in_package(pack, P->W.instruction[LABEL_LAB_IFLD]);
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if (label) {
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WRITE("lab %S", InterSymbol::identifier(label));
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} else { *E = Inode::error(P, I"cannot write lab", NULL); return; }
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}
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inter_symbol *LabInstruction::label_symbol(inter_tree_node *P) {
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inter_package *pack = InterPackage::container(P);
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inter_symbol *lab = InterSymbolsTable::symbol_from_ID_in_package(pack, P->W.instruction[LABEL_LAB_IFLD]);
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if (lab == NULL) internal_error("bad lab");
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return lab;
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}
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