authorgravatar for timonkruiper@gmail.comTimon Kruiper <timonkruiper@gmail.com> 2020-02-11 23:14:08+01:00
committergravatar for andrew@ziglang.orgAndrew Kelley <andrew@ziglang.org> 2020-02-18 15:26:37-05:00
log7560fc716d968f2448bed370affd6162d1e784c4
tree502f5c0acd20c1da8ebf6e611863fa76d71fd4a3
parente8a84927ab989d3c8fb6668dd242ada0a8f99585
signaturelock-open Commit is signed but in an unrecognized format.

Makes the declaration slice resolve lazely when using `@typeInfo`

This way all the declarations in a container won't be resolved untill the user actually uses the decls slice in the builtin TypeInfo union.

4 files changed, 60 insertions(+), 24 deletions(-)

src/all_types.hpp+10
......@@ -369,12 +369,22 @@ enum LazyValueId {
369369 LazyValueIdFnType,
370370 LazyValueIdErrUnionType,
371371 LazyValueIdArrayType,
372 LazyValueIdTypeInfoDecls,
372373};
373374
374375struct LazyValue {
375376 LazyValueId id;
376377};
377378
379struct LazyValueTypeInfoDecls {
380 LazyValue base;
381
382 IrAnalyze *ira;
383
384 ScopeDecls *decls_scope;
385 IrInst *source_instr;
386};
387
378388struct LazyValueAlignOf {
379389 LazyValue base;
380390
src/analyze.cpp+6
......@@ -1150,6 +1150,7 @@ Error type_val_resolve_zero_bits(CodeGen *g, ZigValue *type_val, ZigType *parent
11501150 case LazyValueIdInvalid:
11511151 case LazyValueIdAlignOf:
11521152 case LazyValueIdSizeOf:
1153 case LazyValueIdTypeInfoDecls:
11531154 zig_unreachable();
11541155 case LazyValueIdPtrType: {
11551156 LazyValuePtrType *lazy_ptr_type = reinterpret_cast<LazyValuePtrType *>(type_val->data.x_lazy);
......@@ -1209,6 +1210,7 @@ Error type_val_resolve_is_opaque_type(CodeGen *g, ZigValue *type_val, bool *is_o
12091210 case LazyValueIdInvalid:
12101211 case LazyValueIdAlignOf:
12111212 case LazyValueIdSizeOf:
1213 case LazyValueIdTypeInfoDecls:
12121214 zig_unreachable();
12131215 case LazyValueIdSliceType:
12141216 case LazyValueIdPtrType:
......@@ -1230,6 +1232,7 @@ static ReqCompTime type_val_resolve_requires_comptime(CodeGen *g, ZigValue *type
12301232 case LazyValueIdInvalid:
12311233 case LazyValueIdAlignOf:
12321234 case LazyValueIdSizeOf:
1235 case LazyValueIdTypeInfoDecls:
12331236 zig_unreachable();
12341237 case LazyValueIdSliceType: {
12351238 LazyValueSliceType *lazy_slice_type = reinterpret_cast<LazyValueSliceType *>(type_val->data.x_lazy);
......@@ -1303,6 +1306,7 @@ start_over:
13031306 case LazyValueIdInvalid:
13041307 case LazyValueIdAlignOf:
13051308 case LazyValueIdSizeOf:
1309 case LazyValueIdTypeInfoDecls:
13061310 zig_unreachable();
13071311 case LazyValueIdSliceType: {
13081312 LazyValueSliceType *lazy_slice_type = reinterpret_cast<LazyValueSliceType *>(type_val->data.x_lazy);
......@@ -1370,6 +1374,7 @@ Error type_val_resolve_abi_align(CodeGen *g, AstNode *source_node, ZigValue *typ
13701374 case LazyValueIdInvalid:
13711375 case LazyValueIdAlignOf:
13721376 case LazyValueIdSizeOf:
1377 case LazyValueIdTypeInfoDecls:
13731378 zig_unreachable();
13741379 case LazyValueIdSliceType:
13751380 case LazyValueIdPtrType:
......@@ -1412,6 +1417,7 @@ static OnePossibleValue type_val_resolve_has_one_possible_value(CodeGen *g, ZigV
14121417 case LazyValueIdInvalid:
14131418 case LazyValueIdAlignOf:
14141419 case LazyValueIdSizeOf:
1420 case LazyValueIdTypeInfoDecls:
14151421 zig_unreachable();
14161422 case LazyValueIdSliceType: // it has the len field
14171423 case LazyValueIdOptType: // it has the optional bit
src/ir.cpp+41-4
......@@ -21221,6 +21221,13 @@ static IrInstGen *ir_analyze_struct_field_ptr(IrAnalyze *ira, IrInst* source_ins
2122121221 return ira->codegen->invalid_inst_gen;
2122221222 if (type_is_invalid(struct_val->type))
2122321223 return ira->codegen->invalid_inst_gen;
21224
21225 // This to allow lazy values to be resolved.
21226 if ((err = ir_resolve_const_val(ira->codegen, ira->new_irb.exec,
21227 source_instr->source_node, struct_val, UndefOk)))
21228 {
21229 return ira->codegen->invalid_inst_gen;
21230 }
2122421231 if (initializing && struct_val->special == ConstValSpecialUndef) {
2122521232 struct_val->data.x_struct.fields = alloc_const_vals_ptrs(ira->codegen, struct_type->data.structure.src_field_count);
2122621233 struct_val->special = ConstValSpecialStatic;
......@@ -23626,7 +23633,7 @@ static ZigType *ir_type_info_get_type(IrAnalyze *ira, const char *type_name, Zig
2362623633}
2362723634
2362823635static Error ir_make_type_info_decls(IrAnalyze *ira, IrInst* source_instr, ZigValue *out_val,
23629 ScopeDecls *decls_scope)
23636 ScopeDecls *decls_scope, bool resolve_types)
2363023637{
2363123638 Error err;
2363223639 ZigType *type_info_declaration_type = ir_type_info_get_type(ira, "Declaration", nullptr);
......@@ -23637,6 +23644,24 @@ static Error ir_make_type_info_decls(IrAnalyze *ira, IrInst* source_instr, ZigVa
2363723644 ensure_field_index(type_info_declaration_type, "is_pub", 1);
2363823645 ensure_field_index(type_info_declaration_type, "data", 2);
2363923646
23647 if (!resolve_types) {
23648 ZigType *ptr_type = get_pointer_to_type_extra(ira->codegen, type_info_declaration_type,
23649 false, false, PtrLenUnknown, 0, 0, 0, false);
23650
23651 out_val->special = ConstValSpecialLazy;
23652 out_val->type = get_slice_type(ira->codegen, ptr_type);
23653
23654 LazyValueTypeInfoDecls *lazy_type_info_decls = heap::c_allocator.create<LazyValueTypeInfoDecls>();
23655 lazy_type_info_decls->ira = ira; ira_ref(ira);
23656 out_val->data.x_lazy = &lazy_type_info_decls->base;
23657 lazy_type_info_decls->base.id = LazyValueIdTypeInfoDecls;
23658
23659 lazy_type_info_decls->source_instr = source_instr;
23660 lazy_type_info_decls->decls_scope = decls_scope;
23661
23662 return ErrorNone;
23663 }
23664
2364023665 ZigType *type_info_declaration_data_type = ir_type_info_get_type(ira, "Data", type_info_declaration_type);
2364123666 if ((err = type_resolve(ira->codegen, type_info_declaration_data_type, ResolveStatusSizeKnown)))
2364223667 return err;
......@@ -24189,7 +24214,7 @@ static Error ir_make_type_info_value(IrAnalyze *ira, IrInst* source_instr, ZigTy
2418924214 // decls: []TypeInfo.Declaration
2419024215 ensure_field_index(result->type, "decls", 3);
2419124216 if ((err = ir_make_type_info_decls(ira, source_instr, fields[3],
24192 type_entry->data.enumeration.decls_scope)))
24217 type_entry->data.enumeration.decls_scope, false)))
2419324218 {
2419424219 return err;
2419524220 }
......@@ -24361,7 +24386,7 @@ static Error ir_make_type_info_value(IrAnalyze *ira, IrInst* source_instr, ZigTy
2436124386 // decls: []TypeInfo.Declaration
2436224387 ensure_field_index(result->type, "decls", 3);
2436324388 if ((err = ir_make_type_info_decls(ira, source_instr, fields[3],
24364 type_entry->data.unionation.decls_scope)))
24389 type_entry->data.unionation.decls_scope, false)))
2436524390 {
2436624391 return err;
2436724392 }
......@@ -24453,7 +24478,7 @@ static Error ir_make_type_info_value(IrAnalyze *ira, IrInst* source_instr, ZigTy
2445324478 // decls: []TypeInfo.Declaration
2445424479 ensure_field_index(result->type, "decls", 2);
2445524480 if ((err = ir_make_type_info_decls(ira, source_instr, fields[2],
24456 type_entry->data.structure.decls_scope)))
24481 type_entry->data.structure.decls_scope, false)))
2445724482 {
2445824483 return err;
2445924484 }
......@@ -30391,6 +30416,18 @@ static Error ir_resolve_lazy_raw(AstNode *source_node, ZigValue *val) {
3039130416 switch (val->data.x_lazy->id) {
3039230417 case LazyValueIdInvalid:
3039330418 zig_unreachable();
30419 case LazyValueIdTypeInfoDecls: {
30420 LazyValueTypeInfoDecls *type_info_decls = reinterpret_cast<LazyValueTypeInfoDecls *>(val->data.x_lazy);
30421 IrAnalyze *ira = type_info_decls->ira;
30422
30423 if ((err = ir_make_type_info_decls(ira, type_info_decls->source_instr, val, type_info_decls->decls_scope, true)))
30424 {
30425 return err;
30426 };
30427
30428 // We can't free the lazy value here, because multiple other ZigValues might be pointing to it.
30429 return ErrorNone;
30430 }
3039430431 case LazyValueIdAlignOf: {
3039530432 LazyValueAlignOf *lazy_align_of = reinterpret_cast<LazyValueAlignOf *>(val->data.x_lazy);
3039630433 IrAnalyze *ira = lazy_align_of->ira;
test/compile_errors.zig+3-20
......@@ -30,10 +30,11 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
3030 "tmp.zig:5:22: error: expected type 'fn([*c]u8, ...) callconv(.C) void', found 'fn([*:0]u8, ...) callconv(.C) void'",
3131 });
3232
33 cases.addTest("dependency loop in top-level decl with @TypeInfo",
34 \\export const foo = @typeInfo(@This());
33 cases.addTest("dependency loop in top-level decl with @TypeInfo when accessing the decls",
34 \\export const foo = @typeInfo(@This()).Struct.decls;
3535 , &[_][]const u8{
3636 "tmp.zig:1:20: error: dependency loop detected",
37 "tmp.zig:1:45: note: referenced here",
3738 });
3839
3940 cases.add("function call assigned to incorrect type",
......@@ -1346,24 +1347,6 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
13461347 "tmp.zig:8:28: note: referenced here",
13471348 });
13481349
1349 cases.add("@typeInfo causing depend on itself compile error",
1350 \\const start = struct {
1351 \\ fn crash() bug() {
1352 \\ return bug;
1353 \\ }
1354 \\};
1355 \\fn bug() void {
1356 \\ _ = @typeInfo(start).Struct;
1357 \\}
1358 \\export fn entry() void {
1359 \\ var boom = start.crash();
1360 \\}
1361 , &[_][]const u8{
1362 "tmp.zig:7:9: error: dependency loop detected",
1363 "tmp.zig:2:19: note: referenced here",
1364 "tmp.zig:10:21: note: referenced here",
1365 });
1366
13671350 cases.add("enum field value references enum",
13681351 \\pub const Foo = extern enum {
13691352 \\ A = Foo.B,