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138 lines
4.8 KiB
OpenEdge ABL
138 lines
4.8 KiB
OpenEdge ABL
[Inter::Primitive::] The Primitive Construct.
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Defining the primitive construct.
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@
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@e PRIMITIVE_IST
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=
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void Inter::Primitive::define(void) {
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inter_construct *IC = Inter::Defn::create_construct(
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PRIMITIVE_IST,
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L"primitive (!%i+) (%c+) -> (%C+)",
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I"primitive", I"primitives");
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IC->usage_permissions = OUTSIDE_OF_PACKAGES;
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METHOD_ADD(IC, CONSTRUCT_READ_MTID, Inter::Primitive::read);
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METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, Inter::Primitive::verify);
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METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, Inter::Primitive::write);
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}
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@
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@d DEFN_PRIM_IFLD 2
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@d CAT_PRIM_IFLD 3
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@d MIN_EXTENT_PRIM_IFR 4
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@d VAL_PRIM_CAT 1
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@d REF_PRIM_CAT 2
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@d LAB_PRIM_CAT 3
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@d CODE_PRIM_CAT 4
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=
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void Inter::Primitive::read(inter_construct *IC, inter_bookmark *IBM, inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) {
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*E = Inter::Defn::vet_level(IBM, PRIMITIVE_IST, ilp->indent_level, eloc);
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if (*E) return;
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if (Inter::Annotations::exist(&(ilp->set))) { *E = Inter::Errors::plain(I"__annotations are not allowed", eloc); return; }
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inter_symbol *prim_name = Inter::Textual::new_symbol(eloc, InterBookmark::scope(IBM), ilp->mr.exp[0], E);
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if (*E) return;
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inter_tree_node *F = Inode::fill_1(IBM, PRIMITIVE_IST, InterSymbolsTables::id_from_IRS_and_symbol(IBM, prim_name), eloc, (inter_ti) ilp->indent_level);
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text_stream *in = ilp->mr.exp[1];
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match_results mr2 = Regexp::create_mr();
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while (Regexp::match(&mr2, in, L" *(%i+) *(%c*)")) {
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inter_ti lcat = Inter::Primitive::category(eloc, mr2.exp[0], E);
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if (*E) return;
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if (lcat == 0) break;
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if (Inode::extend(F, (inter_ti) 1) == FALSE) internal_error("can't extend");
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F->W.data[F->W.extent - 1] = lcat;
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Str::copy(in, mr2.exp[1]);
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}
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inter_ti rcat = Inter::Primitive::category(eloc, ilp->mr.exp[2], E);
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if (*E) return;
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if (Inode::extend(F, (inter_ti) 1) == FALSE) internal_error("can't extend");
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F->W.data[F->W.extent - 1] = rcat;
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*E = Inter::Defn::verify_construct(InterBookmark::package(IBM), F); if (*E) return;
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NodePlacement::move_to_moving_bookmark(F, IBM);
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}
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inter_ti Inter::Primitive::category(inter_error_location *eloc, text_stream *T, inter_error_message **E) {
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*E = NULL;
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if (Str::eq(T, I"void")) return 0;
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if (Str::eq(T, I"val")) return VAL_PRIM_CAT;
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if (Str::eq(T, I"ref")) return REF_PRIM_CAT;
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if (Str::eq(T, I"lab")) return LAB_PRIM_CAT;
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if (Str::eq(T, I"code")) return CODE_PRIM_CAT;
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*E = Inter::Errors::quoted(I"no such category", T, eloc);
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return VAL_PRIM_CAT;
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}
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void Inter::Primitive::write_category(OUTPUT_STREAM, inter_ti cat) {
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switch (cat) {
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case VAL_PRIM_CAT: WRITE("val"); break;
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case REF_PRIM_CAT: WRITE("ref"); break;
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case LAB_PRIM_CAT: WRITE("lab"); break;
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case CODE_PRIM_CAT: WRITE("code"); break;
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case 0: WRITE("void"); break;
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default: internal_error("bad category");
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}
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}
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void Inter::Primitive::verify(inter_construct *IC, inter_tree_node *P, inter_package *owner, inter_error_message **E) {
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if (P->W.extent < MIN_EXTENT_PRIM_IFR) { *E = Inode::error(P, I"primitive extent wrong", NULL); return; }
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*E = Inter::Verify::defn(owner, P, DEFN_PRIM_IFLD); if (*E) return;
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inter_symbol *prim_name = InterSymbolsTables::symbol_from_id(Inode::globals(P), P->W.data[DEFN_PRIM_IFLD]);
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if ((prim_name == NULL) || (Str::get_first_char(prim_name->symbol_name) != '!'))
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{ *E = Inode::error(P, I"primitive not beginning with '!'", NULL); return; }
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int voids = 0, args = 0;
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for (int i=CAT_PRIM_IFLD; i<P->W.extent-1; i++) {
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if (P->W.data[i] == 0) voids++;
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args++;
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}
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if ((voids > 1) || ((voids == 1) && (args > 1)))
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{ *E = Inode::error(P, I"if used on the left, 'void' must be the only argument", NULL); return; }
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}
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void Inter::Primitive::write(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P, inter_error_message **E) {
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inter_symbol *prim_name = InterSymbolsTables::symbol_from_frame_data(P, DEFN_PRIM_IFLD);
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if (prim_name) {
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WRITE("primitive %S", prim_name->symbol_name);
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int cats = 0;
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for (int i=CAT_PRIM_IFLD; i<P->W.extent-1; i++) {
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WRITE(" ");
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Inter::Primitive::write_category(OUT, P->W.data[i]);
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cats++;
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}
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if (cats == 0) WRITE(" void");
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WRITE(" -> ");
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Inter::Primitive::write_category(OUT, P->W.data[P->W.extent-1]);
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} else { *E = Inode::error(P, I"cannot write primitive", NULL); return; }
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}
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int Inter::Primitive::arity(inter_symbol *prim) {
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if (prim == NULL) return 0;
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inter_tree_node *D = Inter::Symbols::definition(prim);
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if (D == NULL) return 0;
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return D->W.extent - CAT_PRIM_IFLD - 1;
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}
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inter_ti Inter::Primitive::operand_category(inter_symbol *prim, int i) {
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if (prim == NULL) return 0;
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inter_tree_node *D = Inter::Symbols::definition(prim);
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if (D == NULL) return 0;
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return D->W.data[CAT_PRIM_IFLD + i];
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}
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inter_ti Inter::Primitive::result_category(inter_symbol *prim) {
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if (prim == NULL) return 0;
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inter_tree_node *D = Inter::Symbols::definition(prim);
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if (D == NULL) return 0;
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return D->W.data[D->W.extent - 1];
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}
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