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88 lines
3.2 KiB
OpenEdge ABL
88 lines
3.2 KiB
OpenEdge ABL
[Inter::Socket::] The Socket Construct.
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Defining the socket construct.
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@
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@e SOCKET_IST
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=
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void Inter::Socket::define(void) {
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inter_construct *IC = InterConstruct::create_construct(SOCKET_IST, I"socket");
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InterConstruct::specify_syntax(IC, I"socket IDENTIFIER TOKENS");
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METHOD_ADD(IC, CONSTRUCT_READ_MTID, Inter::Socket::read);
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METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, Inter::Socket::verify);
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METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, Inter::Socket::write);
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InterConstruct::allow_in_depth_range(IC, 0, 1);
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InterConstruct::permit(IC, INSIDE_PLAIN_PACKAGE_ICUP);
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}
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void Inter::Socket::read(inter_construct *IC, inter_bookmark *IBM, inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) {
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*E = InterConstruct::check_level_in_package(IBM, SOCKET_IST, ilp->indent_level, eloc);
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if (*E) return;
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if (SymbolAnnotation::nonempty(&(ilp->set))) { *E = Inter::Errors::plain(I"__annotations are not allowed", eloc); return; }
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inter_package *routine = InterBookmark::package(IBM);
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text_stream *symbol_name = ilp->mr.exp[0];
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text_stream *equate_name = NULL;
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match_results mr2 = Regexp::create_mr();
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if (Regexp::match(&mr2, ilp->mr.exp[1], L"~~> \"(%C+)\"")) {
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*E = Inter::Errors::plain(I"a socket cannot wire to a name", eloc); return;
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} else if (Regexp::match(&mr2, ilp->mr.exp[1], L"~~> (%C+)")) {
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equate_name = mr2.exp[0];
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} else {
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*E = Inter::Errors::plain(I"bad socket syntax", eloc); return;
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}
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inter_symbol *name_name = NULL;
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inter_ti level = 0;
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if (routine) {
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inter_symbols_table *locals = InterPackage::scope(routine);
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if (locals == NULL) { *E = Inter::Errors::plain(I"function has no symbols table", eloc); return; }
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name_name = TextualInter::new_symbol(eloc, locals, symbol_name, E);
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if (*E) return;
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inter_symbol *eq = InterSymbolsTable::URL_to_symbol(InterBookmark::tree(IBM), equate_name);
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if (eq == NULL) eq = InterSymbolsTable::symbol_from_name(InterBookmark::scope(IBM), equate_name);
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if (eq == NULL) {
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InterSymbol::make_socket(name_name);
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Wiring::wire_to_name(name_name, equate_name);
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} else {
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Wiring::make_socket_to(name_name, eq);
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}
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level = (inter_ti) ilp->indent_level;
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} else {
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*E = Inter::Errors::plain(I"sockets can exist only in the connectors package", eloc); return;
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}
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}
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void Inter::Socket::verify(inter_construct *IC, inter_tree_node *P, inter_package *owner, inter_error_message **E) {
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internal_error("SOCKET_IST structures cannot exist");
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}
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void Inter::Socket::write(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P, inter_error_message **E) {
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internal_error("SOCKET_IST structures cannot exist");
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}
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@ The following writes a valid line of textual Inter to declare a plug or socket,
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appearing at level |N| in the hierarchy.
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=
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void Inter::Socket::write_declaration(OUTPUT_STREAM, inter_symbol *S, int N) {
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for (int L=0; L<N; L++) WRITE("\t");
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switch (InterSymbol::get_type(S)) {
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case PLUG_ISYMT: WRITE("plug"); break;
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case SOCKET_ISYMT: WRITE("socket"); break;
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default: internal_error("not a connector"); break;
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}
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WRITE(" %S", InterSymbol::identifier(S));
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if (Wiring::is_wired_to_name(S)) {
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WRITE(" ~~> \"%S\"", Wiring::wired_to_name(S));
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} else if (Wiring::is_wired(S)) {
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WRITE(" ~~> ");
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InterSymbolsTable::write_symbol_URL(OUT, Wiring::wired_to(S));
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} else {
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WRITE(" ?");
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}
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}
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