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

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[Inter::Version::] The Version Construct.
Defining the version construct.
@
@e VERSION_IST
=
void Inter::Version::define(void) {
inter_construct *IC = Inter::Defn::create_construct(
VERSION_IST,
L"version (%d+)",
&Inter::Version::read,
NULL,
&Inter::Version::verify,
&Inter::Version::write,
NULL,
NULL,
NULL,
NULL,
I"version", I"versions");
IC->usage_permissions = OUTSIDE_OF_PACKAGES;
}
@
@d NUMBER_VERSION_IFLD 2
@d EXTENT_VERSION_IFR 3
=
inter_error_message *Inter::Version::read(inter_reading_state *IRS, inter_line_parse *ilp, inter_error_location *eloc) {
inter_error_message *E = Inter::Defn::vet_level(IRS, VERSION_IST, ilp->indent_level, eloc);
if (E) return E;
if (ilp->no_annotations > 0) return Inter::Errors::plain(I"__annotations are not allowed", eloc);
return Inter::Version::new(IRS, Str::atoi(ilp->mr.exp[0], 0), (inter_t) ilp->indent_level, eloc);
}
inter_error_message *Inter::Version::new(inter_reading_state *IRS, int V, inter_t level, inter_error_location *eloc) {
inter_frame P = Inter::Frame::fill_1(IRS, VERSION_IST, (inter_t) V, 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::Version::verify(inter_frame P) {
if (P.extent != EXTENT_VERSION_IFR) return Inter::Frame::error(&P, I"extent wrong", NULL);
if (P.data[NUMBER_VERSION_IFLD] < 1) return Inter::Frame::error(&P, I"version out of range", NULL);
return NULL;
}
inter_error_message *Inter::Version::write(OUTPUT_STREAM, inter_frame P) {
WRITE("version %d", P.data[NUMBER_VERSION_IFLD]);
return NULL;
}