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inform7/inter/inter-module/Chapter 4/The Export Construct.w
2019-02-05 00:44:07 +00:00

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[Inter::Export::] The Export Construct.
Defining the export construct.
@
@e EXPORT_IST
@d SYMBOL_EXPORT_IFLD 2
@d TEXT_EXPORT_IFLD 3
@d EXTENT_EXPORT_IFR 4
=
void Inter::Export::define(void) {
Inter::Defn::create_construct(
EXPORT_IST,
L"export (%i+) \"(%c+)\"",
&Inter::Export::read,
NULL,
&Inter::Export::verify,
&Inter::Export::write,
NULL,
NULL,
NULL,
NULL,
I"export", I"exports");
}
inter_error_message *Inter::Export::read(inter_reading_state *IRS, inter_line_parse *ilp, inter_error_location *eloc) {
inter_error_message *E = Inter::Defn::vet_level(IRS, EXPORT_IST, ilp->indent_level, eloc);
if (E) return E;
if (ilp->no_annotations > 0) return Inter::Errors::plain(I"__annotations are not allowed", eloc);
inter_symbol *symbol = Inter::SymbolsTables::symbol_from_name(Inter::Bookmarks::scope(IRS), ilp->mr.exp[0]);
if (symbol == NULL) return Inter::Errors::plain(I"no such symbol", eloc);
inter_t ID = Inter::create_text(IRS->read_into);
E = Inter::Constant::parse_text(Inter::get_text(IRS->read_into, ID), ilp->mr.exp[1], 0, Str::len(ilp->mr.exp[1]), eloc);
if (E) return E;
return Inter::Export::new(IRS, symbol, ID, (inter_t) ilp->indent_level, eloc);
}
inter_error_message *Inter::Export::new(inter_reading_state *IRS, inter_symbol *symbol, inter_t translate_text, inter_t level, struct inter_error_location *eloc) {
inter_frame P = Inter::Frame::fill_2(IRS, EXPORT_IST, Inter::SymbolsTables::id_from_IRS_and_symbol(IRS, symbol), translate_text, eloc, level);
inter_error_message *E = Inter::Defn::verify_construct(P); if (E) return E;
Inter::Frame::insert(P, IRS);
return NULL;
}
inter_error_message *Inter::Export::verify(inter_frame P) {
inter_t vcount = P.repo_segment->bytecode[P.index + PREFRAME_VERIFICATION_COUNT]++;
if (P.extent != EXTENT_EXPORT_IFR) return Inter::Frame::error(&P, I"extent wrong", NULL);
inter_symbol *symbol = Inter::SymbolsTables::symbol_from_frame_data(P, SYMBOL_EXPORT_IFLD);
if (symbol == NULL) return Inter::Frame::error(&P, I"no target name", NULL);
if (P.data[TEXT_EXPORT_IFLD] == 0) return Inter::Frame::error(&P, I"no translation text", NULL);
if (vcount == 0) {
inter_t ID = P.data[TEXT_EXPORT_IFLD];
text_stream *S = Inter::get_text(P.repo_segment->owning_repo, ID);
Inter::Symbols::set_export_name(symbol, S);
}
return NULL;
}
inter_error_message *Inter::Export::write(OUTPUT_STREAM, inter_frame P) {
inter_symbol *symbol = Inter::SymbolsTables::symbol_from_frame_data(P, SYMBOL_EXPORT_IFLD);
inter_t ID = P.data[TEXT_EXPORT_IFLD];
text_stream *S = Inter::get_text(P.repo_segment->owning_repo, ID);
WRITE("export %S \"%S\"", symbol->symbol_name, S);
return NULL;
}