How to use popPos method of json Package

Best Go-testdeep code snippet using json.popPos

codegen.go

Source:codegen.go

...116func (g *Codegen) pushPos(pos token.Pos) {117	g.posstack = append(g.posstack, g.pos)118	g.pos = pos119}120func (g *Codegen) popPos() {121	g.pos = g.posstack[len(g.posstack)-1]122	g.posstack = g.posstack[:len(g.posstack)-1]123}124// isMutableRefType returns true if t is a type which underlying value may be changed without125// assignment. For example a slice.126func isMutableRefType(typ types.Type) bool {127	for {128		switch t := typ.(type) {129		case *types.Array, *types.Slice, *types.Map, *types.Pointer, *types.Struct:130			return true131		case *types.Named:132			typ = t.Underlying()133		default:134			return false135		}136	}137	return false138}139// âââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ140// encode141func (g *Codegen) codegenEncodeField(f *EntField) error {142	cvar := "c"143	expr, err := g.genFieldEncoder(f, cvar, "e."+f.sname)144	if err != nil {145		return err146	}147	g.f("  %s.Key(%#v)\n", cvar, f.name)148	g.f("  %s\n", expr)149	return nil150}151func (g *Codegen) genFieldEncoder(f *EntField, cvar, valexpr string) (string, error) {152	g.pushPos(f.t.pos)153	defer g.popPos()154	expr, err := g.encoderExpr(f.t.Type, cvar, valexpr)155	if err == ErrUnsupportedType {156		g.logErrUnsupportedType(f)157	}158	return expr, err159}160func (g *Codegen) encoderExpr(typ types.Type, cvar, valexpr string) (expr string, err error) {161	typ, cast := g.unwrapNamedType(typ)162	if cast != "" {163		// flip cast164		cast = g.goTypeName(typ)165	}166	switch t := typ.(type) {167	case *types.Basic:168		m, cast, advice := g.basicCodecCall(t, codecEncode, cast != "")169		if advice != "" {170			advice = ", " + advice171		}172		expr = fmt.Sprintf("%s.%s(%s%s)", cvar, m, wrapstr(valexpr, cast), advice)173		return174	case *types.Slice, *types.Array:175		if cast != "" {176			cast = ""177		}178		var elemt types.Type179		if st, ok := t.(*types.Slice); ok {180			elemt = st.Elem()181		} else {182			elemt = t.(*types.Array).Elem()183			// use slice of all arrays (even those that are not [N]byte)184			valexpr += "[:]"185			// convert to slice so that genComplexEncoder uses slice encoders instead of generating186			// array encoders.187			typ = types.NewSlice(elemt)188		}189		// special case for []byte190		if bt, ok := elemt.(*types.Basic); ok && bt.Kind() == types.Uint8 {191			expr = fmt.Sprintf("%s.Blob(%s)", cvar, wrapstr(valexpr, cast))192			return193		}194	}195	expr, err = g.getOrBuildTypeHelper(typ, cvar, "ent_encode_", g.genComplexEncoder)196	expr += "(" + cvar + ", " + wrapstr(valexpr, cast) + ")"197	return198}199func (g *Codegen) genComplexEncoder(typ types.Type, cvar string, buf *bytes.Buffer) error {200	wf := func(format string, args ...interface{}) {201		fmt.Fprintf(buf, format, args...)202	}203	goType := g.goTypeName(typ)204	wf("(%s ent.Encoder, v %s) {\n", cvar, goType)205	switch t := typ.(type) {206	case *types.Slice:207		expr, err := g.encoderExpr(t.Elem(), cvar, "val")208		if err != nil {209			return err210		}211		wf("  %s.BeginList(len(v))\n", cvar)212		wf("  for _, val := range v {\n")213		wf("    %s\n", expr)214		wf("  }\n")215		wf("  %s.EndList()\n", cvar)216	case *types.Map:217		expr, err := g.encoderExpr(t.Elem(), cvar, "val")218		if err != nil {219			return err220		}221		if kt, ok := t.Key().(*types.Basic); !ok || kt.Kind() != types.String {222			g.logSrcErr("unsupported map key type %s; only string map keys are supported", t.Key())223			return ErrUnsupportedType224		}225		wf("  %s.BeginDict(len(v))\n", cvar)226		wf("  for k, val := range v {\n")227		wf("    %s.Key(k)\n", cvar)228		wf("    %s\n", expr)229		wf("  }\n")230		wf("  %s.EndDict()\n", cvar)231	default:232		return ErrUnsupportedType233	} // switch typ234	wf("}\n")235	return nil236}237// âââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ238// decode239func (g *Codegen) codegenDecodeField(f *EntField) error {240	g.pushPos(f.t.pos)241	defer g.popPos()242	expr, cast, err := g.decoderExpr(f.t.Type, "c")243	if err != nil {244		if err == ErrUnsupportedType {245			g.logErrUnsupportedType(f)246		}247		return err248	}249	g.f("  e.%s = %s\n", f.sname, wrapstr(expr, cast))250	return nil251}252// decoderExpr generates & returns a "decode" expression like "c.Int(64)"253func (g *Codegen) decoderExpr(typ types.Type, cvar string) (expr, cast string, err error) {254	typ, cast = g.unwrapNamedType(typ)255	switch t := typ.(type) {256	case *types.Basic:257		m, basicCast, advice := g.basicCodecCall(t, codecDecode, false)258		if cast == "" {259			cast = basicCast260		}261		expr = fmt.Sprintf("%s.%s(%s)", cvar, m, advice)262		return263	case *types.Slice:264		// special case for []byte265		if bt, ok := t.Elem().(*types.Basic); ok && bt.Kind() == types.Uint8 {266			expr = cvar + ".Blob()"267			return268		}269	case *types.Array:270		// arrays are decoded as slices then copied into arrays via a ent_slice_to_AN_T helper271		expr, err = g.getOrBuildTypeHelper(typ, cvar, "ent_slice_to_", g.genCopyHelper)272		if bt, ok := t.Elem().(*types.Basic); ok && bt.Kind() == types.Uint8 {273			// special case for [N]byte274			expr += "(" + cvar + ".Blob())"275		} else {276			slicet := types.NewSlice(t.Elem())277			expr2, err2 := g.getOrBuildTypeHelper(slicet, cvar, "ent_decode_", g.genComplexDecoder)278			err = err2279			expr += "(" + expr2 + "(" + cvar + "))"280		}281		return282	} // switch t:=typ.(type)283	expr, err = g.getOrBuildTypeHelper(typ, cvar, "ent_decode_", g.genComplexDecoder)284	expr += "(" + cvar + ")"285	return286}287// genCopyHelper assumes typ is *types.Array288func (g *Codegen) genCopyHelper(typ types.Type, cvar string, buf *bytes.Buffer) error {289	wf := func(format string, args ...interface{}) {290		fmt.Fprintf(buf, format, args...)291	}292	elemt := typ.(*types.Array).Elem()293	goType := g.goTypeName(typ)294	elemGoType := g.goTypeName(elemt)295	wf("(s []%s) (r %s) {\n", elemGoType, goType)296	wf("  copy(r[:], s)\n")297	wf("  return\n" +298		"}\n")299	return nil300}301func (g *Codegen) genComplexDecoder(typ types.Type, cvar string, buf *bytes.Buffer) error {302	wf := func(format string, args ...interface{}) {303		fmt.Fprintf(buf, format, args...)304	}305	goType := g.goTypeName(typ)306	wf("(%s ent.Decoder) (r %s) {\n", cvar, goType)307	switch t := typ.(type) {308	case *types.Slice:309		expr, cast, err := g.decoderExpr(t.Elem(), cvar)310		if err != nil {311			return err312		}313		wf("  n := %s.ListHeader()\n", cvar)314		wf("  if n > -1 {\n")315		wf("    r = make(%s, 0, n)\n", goType)316		wf("    for i := 0; i < n; i++ {\n")317		wf("      r = append(r, %s)\n", wrapstr(expr, cast))318		wf("    }\n")319		wf("  } else {\n")320		wf("    for %s.More() {\n", cvar)321		wf("      r = append(r, %s)\n", wrapstr(expr, cast))322		wf("    }\n")323		wf("  }\n")324	case *types.Map:325		expr, cast, err := g.decoderExpr(t.Elem(), cvar)326		if err != nil {327			return err328		}329		// note: we don't check that key type is string since we already check for that in330		// genComplexEncoder331		valueGoType := g.goTypeName(t.Elem())332		wf("  n := %s.DictHeader()\n", cvar)333		wf("  r = make(map[string]%s, n)\n", valueGoType)334		wf("  if n > -1 {\n")335		wf("    for i := 0; i < n; i++ {\n")336		wf("      k := %s.Key()\n", cvar)337		wf("      r[k] = %s\n", wrapstr(expr, cast))338		wf("    }\n")339		wf("  } else {\n")340		wf("    for %s.More() {\n", cvar)341		wf("      k := %s.Key()\n", cvar)342		wf("      r[k] = %s\n", wrapstr(expr, cast))343		wf("    }\n")344		wf("  }\n")345	// case *types.Array:346	// 	expr, cast, err := g.decoderExpr(t.Elem())347	// 	if err != nil {348	// 		return err349	// 	}350	// 	wf("  n := c.ListHeader()\n")351	// 	wf("  if n < 0 {\n")352	// 	wf("    for i := 0; c.More(); i++ {\n")353	// 	wf("      if i < %d {\n", t.Len())354	// 	wf("        r[i] = %s\n", wrapstr(expr, cast))355	// 	wf("      } else {\n")356	// 	wf("        c.Discard()\n")357	// 	wf("      }\n")358	// 	wf("    }\n")359	// 	wf("  } else {\n")360	// 	wf("    if n > %d { n = %d }\n", t.Len(), t.Len())361	// 	wf("    for i := 0; i < n; i++ {\n")362	// 	wf("      r[i] = %s\n", wrapstr(expr, cast))363	// 	wf("    }\n")364	// 	wf("  }\n")365	default:366		return ErrUnsupportedType367	} // switch typ368	wf("  return\n}\n") // end of `func {fname}(cvar ent.Decoder) ...`369	return nil370}371// âââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ372// both encoding & decoding373type HelperBuilder = func(t types.Type, cvar string, b *bytes.Buffer) error374func (g *Codegen) getOrBuildTypeHelper(375	typ types.Type,376	cvar, fnamePrefix string,377	builder HelperBuilder,378) (string, error) {379	fname, err := Typemangle(g.pkg.Types, typ)380	if err != nil {381		return "", err382	}383	fname = fnamePrefix + fname384	err = g.getOrBuildHelper(fname, cvar, typ, builder)385	return fname, err386}387func (g *Codegen) getOrBuildHelper(fname, cvar string, t types.Type, builder HelperBuilder) error {388	if g.helperm == nil {389		g.helperm = map[string]error{}390	} else {391		err, ok := g.helperm[fname]392		if ok {393			return err394		}395	}396	log.Debug("codegen helper %s", fname)397	var buf bytes.Buffer398	buf.WriteString("\nfunc ")399	buf.WriteString(fname)400	err := builder(t, cvar, &buf)401	g.helperm[fname] = err402	if err == nil {403		g.helperw.Write(buf.Bytes())404	}405	return err406}407func (g *Codegen) unwrapNamedType(typ types.Type) (canonical types.Type, cast string) {408	// unwrap named type (does not include aliases, which do not need casting)409	canonical = typ410	for {411		t, ok := canonical.(*types.Named)412		if !ok {413			break414		}415		canonical = t.Underlying()416		if canonical == typ {417			break418		}419		if cast == "" {420			cast = g.goTypeName(typ)421		}422	}423	return424}425func (g *Codegen) basicCodecCall(426	t *types.Basic, cdir codecDir, mustcast bool,427) (m, cast, advice string) {428	kind := t.Kind()429	var wantadvice bool430	setcast := func(enccast string) {431		if cdir == codecDecode {432			cast = g.goTypeName(t)433		} else {434			cast = enccast435		}436	}437	switch kind {438	case types.Bool, types.UntypedBool:439		m = "Bool"440	case types.Int, types.UntypedInt, types.Int8, types.Int16, types.Int32, types.Int64,441		types.UntypedRune:442		if mustcast || kind != types.Int64 {443			setcast("int64")444		}445		m = "Int"446		wantadvice = true447	case types.Uint, types.Uint8, types.Uint16, types.Uint32, types.Uint64,448		types.Uintptr, types.UnsafePointer:449		if mustcast || kind != types.Uint64 {450			setcast("uint64")451		}452		m = "Uint"453		wantadvice = true454	case types.UntypedFloat, types.Float32, types.Float64:455		if mustcast || kind != types.Float64 {456			setcast("float64")457		}458		m = "Float"459		wantadvice = true460	case types.UntypedComplex, types.Complex64, types.Complex128:461		if mustcast || kind != types.Complex128 {462			setcast("complex128")463		}464		m = "Complex"465		wantadvice = true466	case types.String, types.UntypedString:467		m = "Str"468	}469	if wantadvice {470		advice = basicKindSizeAdvice(t.Kind())471	}472	return473}474// âââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ475// ent476func (g *Codegen) codegenEnt(e *EntInfo) error {477	w := g.w478	g.pushPos(e.pos)479	defer g.popPos()480	log.Info("codegen ent %q (%s.%s)", e.name, e.pkg.Name, e.sname)481	linefeed := []byte{'\n'}482	wstr := func(s string) { w.Write([]byte(s)) }483	wline := func() { w.Write(linefeed) }484	// wbyte := func(b byte) { w.Write([]byte{b}) }485	userMethods := e.getUserMethods()486	generatedMethods := map[string]bool{}487	var err error488	// methodIsUndefined checks if user has defined "name" method489	methodIsUndefined := func(name string) bool {490		return userMethods[name] == nil && !generatedMethods[name]491	}492	// methodMustBeUndefined checks if user has defined "name" method. If not, returns true.493	// If there is a definition, logs an error and returns false.494	methodMustBeUndefined := func(name, help string) bool {495		m := userMethods[name]496		if m == nil {497			if generatedMethods[name] {498				panic("trying to generate method " + name + " twice")499			}500			return true501		}502		if help != "" {503			help = " " + help504		}505		e.logSrcErr(m.pos, "ent method %s already defined for %s.%s", name, e.sname, help)506		if err == nil {507			err = fmt.Errorf("method definition conflict")508		}509		// TODO error510		return false511	}512	methodWarnIfDefinedAlt := func(name, help string) string {513		if m := userMethods[name]; m != nil {514			lname := inverseCapitalize(name)515			if lname != name {516				if help != "" {517					help = " " + help518				}519				e.logSrcWarn(m.pos,520					"ent method %s is already defined for %s. Naming the generated method %s instead.%s",521					name, e.sname, lname, help)522				help = "" // so we don't print it twice in case there's an error next523			}524			name = lname525			methodMustBeUndefined(name, help)526		} else if generatedMethods[name] {527			panic("trying to generate method " + name + " twice")528		}529		return name530	}531	funcIsUndefined := func(name string) bool {532		// TODO user functions533		return !g.generatedFunctions[name]534	}535	// compile indexes536	fieldIndexes := g.collectFieldIndexes(e.fields)537	g.f(538		"// ----------------------------------------------------------------------------\n// %s\n\n",539		e.sname)540	// // replicate original struct documentation541	// if len(e.doc) > 0 {542	//  wstr("// ")543	//  wstr(strings.Join(e.doc, "\n// "))544	//  wline()545	// }546	// variables & constants547	// // ent.Register548	// wline()549	// g.f("var _ = ent.Register(&%s{})\n", e.sname)550	// wline()551	// LoadTYPEById(s ent.Storage, id uint64) (*TYPE, error)552	fname := "Load" + e.sname + "ById"553	if funcIsUndefined(fname) {554		g.generatedFunctions[fname] = true555		g.f("// %s loads %s with id from storage\n"+556			"func %s(storage ent.Storage, id uint64) (*%s, error)\t{\n"+557			"  e := &%s{}\n"+558			"  return e, ent.LoadEntById(e, storage, id)\n"+559			"}\n\n",560			fname, e.sname,561			fname, e.sname,562			e.sname)563	}564	// FindTYPEByINDEX565	// LoadTYPEByINDEX566	for _, fx := range fieldIndexes {567		if err := g.genFindTYPEByINDEX(e, fx); err != nil {568			return err569		}570	}571	mname := "EntTypeName"572	if methodMustBeUndefined(mname, "Use tag on EntBase field instead (e.g. `typename`)") {573		generatedMethods[mname] = true574		g.f("// %s returns the ent's storage name (%q)\n"+575			"func (e %s) %s() string\t{ return %#v }\n\n",576			mname, e.name,577			e.sname, mname, e.name)578	}579	mname = "EntStorage"580	if methodIsUndefined(mname) {581		generatedMethods[mname] = true582		g.f("// %s returns the storage this ent belongs to or nil if it doesn't belong anywhere.\n"+583			"func (e *%s) %s() ent.Storage\t{ return ent.GetStorage(e) }\n\n",584			mname,585			e.sname, mname)586	}587	mname = "EntNew"588	if methodIsUndefined(mname) {589		generatedMethods[mname] = true590		g.f("// %s returns a new empty %s. Used by the ent package for loading ents.\n"+591			"func (e %s) %s() ent.Ent\t{ return &%s{} }\n\n",592			mname, e.sname,593			e.sname, mname, e.sname)594	}595	mname = "MarshalJSON"596	if methodIsUndefined(mname) {597		generatedMethods[mname] = true598		g.f("// %s returns a JSON representation of e. Conforms to json.Marshaler.\n"+599			"func (e *%s) %s() ([]byte, error) { return ent.JsonEncode(e, \"\") }\n\n",600			mname,601			e.sname, mname)602	}603	mname = "UnmarshalJSON"604	if methodIsUndefined(mname) {605		generatedMethods[mname] = true606		g.f("// %s populates the ent from JSON data. Conforms to json.Unmarshaler.\n"+607			"func (e *%s) %s(b []byte) error { return ent.JsonDecode(e, b) }\n\n",608			mname,609			e.sname, mname)610	}611	mname = "String"612	if methodIsUndefined(mname) {613		generatedMethods[mname] = true614		g.f("// %s returns a JSON representation of e.\n"+615			"func (e %s) %s() string { return ent.EntString(&e) }\n\n",616			mname,617			e.sname, mname)618	}619	mname = "Create"620	if methodIsUndefined(mname) {621		generatedMethods[mname] = true622		g.f("// %s a new %s ent in storage\n"+623			"func (e *%s) %s(storage ent.Storage) error\t{ return ent.CreateEnt(e, storage) }\n",624			mname, e.name,625			e.sname, mname)626	}627	mname = "Save"628	if methodIsUndefined(mname) {629		generatedMethods[mname] = true630		g.f("// %s pending changes to whatever storage this ent was created or loaded from\n"+631			"func (e *%s) %s() error\t{ return ent.SaveEnt(e) }\n",632			mname,633			e.sname, mname)634	}635	mname = "Reload"636	if methodIsUndefined(mname) {637		generatedMethods[mname] = true638		g.f("// %s fields to latest values from storage, discarding any unsaved changes\n"+639			"func (e *%s) %s() error\t{ return ent.ReloadEnt(e) }\n",640			mname,641			e.sname, mname)642	}643	mname = "PermanentlyDelete"644	if methodIsUndefined(mname) {645		generatedMethods[mname] = true646		g.f("// %s deletes this ent from storage. This can usually not be undone.\n"+647			"func (e *%s) %s() error\t{ return ent.DeleteEnt(e) }\n",648			mname,649			e.sname, mname)650	}651	mname = "Iterator"652	if methodIsUndefined(mname) {653		generatedMethods[mname] = true654		g.f("// %s returns an iterator over all %s ents. Order is undefined.\n"+655			"func (e %s) %s(s ent.Storage) ent.EntIterator\t{ return s.IterateEnts(&e) }\n",656			mname, e.sname,657			e.sname, mname)658	}659	wline()660	// begin field accessor methods661	if len(e.fields) > 0 {662		wstr("// ---- field accessor methods ----\n\n")663		fieldsWithTags := []*EntField{}664		// field getters665		// func (e *ENTTYPE) Field() { return e.field }666		didGenerateGetters := false667		for _, field := range e.fields {668			if len(field.tags) > 0 {669				fieldsWithTags = append(fieldsWithTags, field)670			}671			// skip gettter if the field has a public name672			if field.uname == field.sname {673				continue674			}675			// skip if user has defined a method with the same name676			if !methodIsUndefined(field.uname) {677				continue678			}679			// sname is lower case; generate getter function680			// if the field has documentation, add it to the getter for nice godoc681			if len(field.doc) > 0 {682				wstr("// ")683				wstr(strings.Join(field.doc, "\n// "))684				wline()685			}686			g.f("func (e *%s) %s() %s\t{ return e.%s }\n",687				e.sname,688				field.uname,689				g.goTypeName(field.t.Type),690				field.sname,691			)692			generatedMethods[field.uname] = true693			didGenerateGetters = true694		}695		if didGenerateGetters {696			wline()697		}698		// field setters699		// func (e *Type) SetField() { e.field  }700		fieldSetterPrefix := "Set"701		if g.PrivateFieldSetters {702			fieldSetterPrefix = "set"703		}704		var genChangedSetters []*EntField705		var genConditionalSetters []*EntField706		var genConditionalSettersSetNames []string707		for _, field := range e.fields {708			mname := fieldSetterPrefix + field.uname709			if !methodIsUndefined(mname) {710				if g.PrivateFieldSetters {711					continue712				}713				// If the user has defined a method with the same name, define a private lower-case version714				//715				// This can be useful for the author to use in composition, e.g.716				//   // user-defined717				//   func (e *Foo) SetThing(v int) {718				//     if someCondition() {719				//       e.setThing()  // call entgen-generated method720				//     }721				//   }722				//723				mname = "set" + field.uname724				if !methodIsUndefined(mname) {725					// user has defined that one too; they don't want it to be generated.726					continue727				}728			}729			if types.Comparable(field.t.Type) {730				genConditionalSetters = append(genConditionalSetters, field)731				genConditionalSettersSetNames = append(genConditionalSettersSetNames, mname)732			}733			g.f("func (e *%s) %s(v %s)\t{"+734				" e.%s = v;"+735				" e.EntBase.SetEntFieldChanged(%d)"+736				"}\n",737				e.sname, mname, g.goTypeName(field.t.Type),738				field.sname,739				field.index,740			)741			generatedMethods[mname] = true742			if isMutableRefType(field.t.Type) {743				genChangedSetters = append(genChangedSetters, field)744			}745		}746		// SetFIELDIfDifferent()747		if len(genConditionalSetters) > 0 {748			wline()749			for i, field := range genConditionalSetters {750				mname := fieldSetterPrefix + field.uname + "IfDifferent"751				if !methodIsUndefined(mname) {752					continue753				}754				generatedMethods[mname] = true755				setMname := genConditionalSettersSetNames[i]756				g.f("// %s sets %s only if v is different from the current value.\n"+757					"func (e *%s) %s(v %s) bool\t{\n"+758					"  if e.%s == v {\n"+759					"    return false\n"+760					"  }\n"+761					"  e.%s(v)\n"+762					"  return true\n"+763					"}\n\n",764					mname, field.sname,765					e.sname, mname, g.goTypeName(field.t.Type),766					field.sname,767					setMname,768				)769			}770		}771		// SetFIELDChanged(bool) -- only for fields of referential mutable types772		if len(genChangedSetters) > 0 {773			wline()774			for _, field := range genChangedSetters {775				mname := fieldSetterPrefix + field.uname + "Changed"776				if !methodIsUndefined(mname) {777					continue778				}779				generatedMethods[mname] = true780				g.f("func (e *%s) %s()\t{ e.EntBase.SetEntFieldChanged(%d) }\n",781					e.sname, mname, field.index)782			}783		}784		// EntEncode & EntDecode785		wstr("// ---- encode & decode methods ----\n\n")786		// -- EntEncode --787		mname := methodWarnIfDefinedAlt(788			"EntEncode",789			"Make sure to call entEncode from your EntEncode method",790		)791		generatedMethods[mname] = true792		g.f("\nfunc (e *%s) %s(c ent.Encoder, fields ent.FieldSet) {", e.sname, mname)793		// g.f("\n\teb := &e.EntBase\n")794		for _, field := range e.fields {795			g.pushPos(field.pos)796			// Note: Rather than precomputing (1<<field.index), let the compiler apply constant797			// evaluation instead. This makes the generated code more readable.798			g.f("\tif fields.Has(%d)\t{", field.index)799			err := g.codegenEncodeField(field)800			wstr(" }\n")801			g.popPos()802			if err != nil {803				return err804			}805		}806		wstr("}\n")807		// -- EntDecode --808		mname = methodWarnIfDefinedAlt(809			"EntDecode",810			"Make sure to call entDecode from your EntDecode method",811		)812		generatedMethods[mname] = true813		if err := g.genEntDecode(e, mname); err != nil {814			return err815		}816	}817	// -- EntDecodePartial --818	mname = methodWarnIfDefinedAlt(819		"EntDecodePartial",820		"Make sure to call entDecodeIndexed from your EntDecodePartial method",821	)822	generatedMethods[mname] = true823	if err := g.genEntDecodePartial(e, mname); err != nil {824		return err825	}826	// EntFields827	if methodMustBeUndefined("EntFields", "") {828		g.genEntFields(e)829	}830	// data & methods for ents with indexes831	if len(fieldIndexes) > 0 {832		// -- EntIndexes --833		if methodIsUndefined("EntIndexes") {834			generatedMethods["EntIndexes"] = true835			g.f("\n// Indexes (Name, Fields, Flags)\n")836			g.f("var ent_%s_idx = []ent.EntIndex{\n", e.sname)837			for _, x := range fieldIndexes {838				var flags []string839				if (x.flags & fieldIndexUnique) != 0 {840					flags = append(flags, "ent.EntIndexUnique")841				}842				if len(flags) == 0 {843					flags = append(flags, "0")844				}845				fieldIndices := genFieldmap(e, x.fields)846				g.f("{ %#v, %s, %s },\n", x.name, fieldIndices, strings.Join(flags, "|"))847			}848			g.f("}\n\n")849			g.f("// EntIndexes returns information about secondary indexes\n")850			g.f("func (e *%s) EntIndexes() []ent.EntIndex { return ent_%s_idx }\n",851				e.sname, e.sname)852		}853	} // if len(fieldIndexes) > 0854	if log.RootLogger.Level <= log.LevelDebug {855		log.Debug("methods generated for %s:%s", e.sname, fmtMappedNames(generatedMethods))856	}857	g.scanImportsNeededForEnt(e)858	return err859}860// typePkgName returns the package name for a type that is from an external package.861// E.g:862//   package foo863//   "int" => ""864//   "foo.Thing" => ""865//   "bar.Thing" => "bar"866//   "[]bar.Thing" => "bar"867//868func (g *Codegen) typePkgName(t types.Type) string {869	if t, ok := t.(*types.Named); ok {870		if o := t.Obj(); o != nil {871			if pkg := o.Pkg(); pkg != nil && pkg != g.pkg.Types && pkg.Path() != g.pkg.Types.Path() {872				return pkg.Name()873			}874		}875	}876	return ""877}878func (g *Codegen) scanImportsNeededForEnt(e *EntInfo) {879	// collect all unique named types which has package information880	uniqueNamedTypes := make(map[*types.Named]*types.TypeName)881	for _, field := range e.fields {882		if t, ok := field.t.Type.(*types.Named); ok {883			if o := t.Obj(); o != nil {884				if o.Pkg() != nil {885					uniqueNamedTypes[t] = o886				}887			}888		}889	}890	// for each unique named type...891	ePkgPath := g.pkg.Types.Path()892	for _, o := range uniqueNamedTypes {893		pkg := o.Pkg() // note: never nil894		// log.Debug("%v\n  o.id=%v, o.name=%v, pkg.name=%s, pkg.path=%q", t,895		// 	o.Id(), o.Name(), pkg.Name(), pkg.Path())896		pkgPath := pkg.Path()897		if pkgPath != ePkgPath && pkgPath != g.entpkgPath {898			g.imports = append(g.imports, PkgImport{Path: pkgPath})899		}900	}901}902func (g *Codegen) genEntFields(e *EntInfo) {903	// entField* constants for symbolic field indices904	var fieldmap uint64905	if len(e.fields) > 0 {906		g.s("// Symbolic field indices, for use with ent.*FieldChanged methods\n")907		g.s("const (\n")908		for _, field := range e.fields {909			fieldmap |= (1 << field.index)910			g.f("  ent_%s_f_%s\t= %d\n", e.sname, field.sname, field.index)911		}912		g.s(")\n\n")913	}914	g.f("// EntFields returns information about %s fields\n", e.sname)915	g.f("var ent_%s_fields = ent.Fields{\n", e.sname)916	g.f("  Names: []string{\n")917	for _, field := range e.fields {918		g.f("    %#v,\n", field.name)919	}920	g.f("  },\n")921	g.f("  FieldSet:\t0b%b,\n", fieldmap)922	g.f("}\n\n")923	g.f("// EntFields returns information about %s fields\n", e.sname)924	g.f("func (e %s) EntFields() ent.Fields { return ent_%s_fields }\n", e.sname, e.sname)925}926func genFieldmap(e *EntInfo, fields []*EntField) string {927	v := make([]string, len(fields))928	for i, field := range fields {929		v[i] = fmt.Sprintf("1<<ent_%s_f_%s", e.sname, field.sname)930	}931	if len(v) == 1 {932		return v[0]933	}934	return "(" + strings.Join(v, ") | (") + ")"935}936func (g *Codegen) genFindTYPEByINDEX(e *EntInfo, fx *EntFieldIndex) error {937	svar, cvar, rvar, evar, errvar, tmpvar := "s", "c", "r", "e", "err", "v"938	limitvar, flagsarg := "limit", "fl"939	// package names940	var pkgnames map[string]struct{}941	for _, f := range fx.fields {942		if pkgname := g.typePkgName(f.t.Type); pkgname != "" {943			if pkgnames == nil {944				pkgnames = make(map[string]struct{})945			}946			pkgnames[pkgname] = struct{}{}947		}948	}949	// log.Debug("package names: %v", pkgnames)950	// args951	var prevGoType string952	argchunks := make([]string, 0, len(fx.fields))953	argnames := make([]string, 0, len(fx.fields))954	for i, f := range fx.fields {955		goType := g.goTypeName(f.t.Type)956		if prevGoType == goType {957			argchunks = append(argchunks[:i-1], inverseCapitalize(fx.fields[i-1].sname))958		}959		argname := inverseCapitalize(f.sname)960		for {961			if _, ok := pkgnames[argname]; !ok {962				break963			}964			argname = argname + "_"965		}966		argchunks = append(argchunks, argname+" "+goType)967		argnames = append(argnames, argname)968		prevGoType = goType969		if argname == svar {970			svar = "_" + svar971		} else if argname == cvar {972			cvar = "_" + cvar973		} else if argname == rvar {974			rvar = "_" + rvar975		} else if argname == evar {976			evar = "_" + evar977		} else if argname == errvar {978			errvar = "_" + errvar979		} else if argname == tmpvar {980			tmpvar = "_" + tmpvar981		} else if argname == limitvar {982			limitvar = "_" + limitvar983		} else if argname == flagsarg {984			flagsarg = "_" + flagsarg985		}986	}987	// fieldIndices := genFieldmap(e, fx.fields)988	params := strings.Join(argchunks, ", ")989	var argsComment string990	if len(fx.fields) == 1 {991		argsComment = "with " + argnames[0]992	} else {993		argsComment = "matching " + strings.Join(argnames, " AND ")994	}995	// use an optimization where the index query is a single field that is a string or byte slice996	useSingleStringKeyOpt := len(fx.fields) == 1 &&997		(isStringType(fx.fields[0].t.Type) || isByteSliceType(fx.fields[0].t.Type))998	// arg0 is used by useSingleStringKeyOpt and is argnames[0] as []byte999	var arg0 string1000	if useSingleStringKeyOpt {1001		arg0 = argnames[0]1002		if isStringType(fx.fields[0].t.Type) {1003			arg0 = "[]byte(" + arg0 + ")"1004		}1005	}1006	// both load and find needs key encoder code, so generate that up front1007	var keyEncoderCode []byte1008	if !useSingleStringKeyOpt {1009		var b bytes.Buffer1010		fmt.Fprintf(&b, "func(%s ent.Encoder) {\n", cvar)1011		for i, f := range fx.fields {1012			expr, err := g.genFieldEncoder(f, cvar, argnames[i])1013			if err != nil {1014				return err1015			}1016			if len(fx.fields) > 1 {1017				fmt.Fprintf(&b, "    %s.Key(%#v)\n", cvar, f.name)1018			}1019			fmt.Fprintf(&b, "    %s\n", expr)1020		}1021		b.WriteString("  }")1022		keyEncoderCode = b.Bytes()1023	}1024	//1025	// Load__By__1026	fname := "Load" + e.sname + "By" + capitalize(fx.name)1027	if fx.IsUnique() {1028		g.f("// %s loads %s %s\n", fname, e.sname, argsComment)1029		g.f("func %s(%s ent.Storage, %s, %s ...ent.LookupFlags) (*%s, error)\t{\n",1030			fname, svar, params, flagsarg, e.sname)1031		g.f("  %s := &%s{}\n", evar, e.sname)1032		if useSingleStringKeyOpt {1033			g.f("  %s := ent.LoadEntByIndexKey(%s, %s, &ent_%s_idx[%d], %s, %s)\n",1034				errvar, svar, evar, e.sname, fx.index, arg0, flagsarg)1035		} else {1036			g.f("  %s := ent.LoadEntByIndex(%s, %s, &ent_%s_idx[%d], %s, %d, %s)\n",1037				errvar, svar, evar, e.sname, fx.index, flagsarg, len(fx.fields), keyEncoderCode)1038		}1039		g.f("  return %s, %s\n", evar, errvar)1040		g.s("}\n\n")1041	} else {1042		sliceCast, err := g.getEntSliceCastHelper(e)1043		if err != nil {1044			return err1045		}1046		g.f("// %s loads all %s ents %s\n", fname, e.sname, argsComment)1047		g.f("func %s(%s ent.Storage, %s, %s int, %s ...ent.LookupFlags) ([]*%s, error)\t{\n",1048			fname, svar, params, limitvar, flagsarg, e.sname)1049		g.f("  %s := &%s{}\n", evar, e.sname)1050		if useSingleStringKeyOpt {1051			g.f("  %s, %s := ent.LoadEntsByIndexKey(%s, %s, &ent_%s_idx[%d], %s, %s, %s)\n",1052				rvar, errvar, svar, evar, e.sname, fx.index, arg0, limitvar, flagsarg)1053		} else {1054			g.f("  %s, %s := ent.LoadEntsByIndex(%s, %s, &ent_%s_idx[%d], %s, %s, %d, %s)\n",1055				rvar, errvar,1056				svar, evar, e.sname, fx.index, limitvar, flagsarg, len(fx.fields), keyEncoderCode)1057		}1058		g.f("  return %s(%s), %s\n", sliceCast, rvar, errvar)1059		g.s("}\n\n")1060	}1061	//1062	// Find__By__1063	fname = "Find" + e.sname + "By" + capitalize(fx.name)1064	if fx.IsUnique() {1065		g.f("// %s looks up %s id %s\n", fname, e.sname, argsComment)1066		g.f("func %s(%s ent.Storage, %s, %s ...ent.LookupFlags) (uint64, error)\t{\n",1067			fname, svar, params, flagsarg)1068		if useSingleStringKeyOpt {1069			g.f("  return ent.FindIdByIndexKey(%s, %#v, &ent_%s_idx[%d], %s, %s)\n",1070				svar, e.name, e.sname, fx.index, arg0, flagsarg)1071		} else {1072			g.f("  return ent.FindIdByIndex(%s, %#v, &ent_%s_idx[%d], %s, %d, %s)\n",1073				svar, e.name, e.sname, fx.index, flagsarg, len(fx.fields), keyEncoderCode)1074		}1075		g.s("}\n\n")1076	} else {1077		g.f("// %s looks up %s ids %s\n", fname, e.sname, argsComment)1078		g.f("func %s(%s ent.Storage, %s, %s int, %s ...ent.LookupFlags) ([]uint64, error)\t{\n",1079			fname, svar, params, limitvar, flagsarg)1080		if useSingleStringKeyOpt {1081			g.f("  return ent.FindIdsByIndexKey(%s, %#v, &ent_%s_idx[%d], %s, %s, %s)\n",1082				svar, e.name, e.sname, fx.index, arg0, limitvar, flagsarg)1083		} else {1084			g.f("  return ent.FindIdsByIndex(%s, %#v, &ent_%s_idx[%d], %s, %s, %d, %s)\n",1085				svar, e.name, e.sname, fx.index, limitvar, flagsarg, len(fx.fields), keyEncoderCode)1086		}1087		g.s("}\n\n")1088	}1089	return nil1090}1091func (g *Codegen) getEntSliceCastHelper(e *EntInfo) (string, error) {1092	fname := fmt.Sprintf("ent_%s_slice_cast", e.sname)1093	err := g.getOrBuildHelper(fname, "c", nil,1094		func(typ types.Type, cvar string, buf *bytes.Buffer) error {1095			wf := func(format string, args ...interface{}) {1096				fmt.Fprintf(buf, format, args...)1097			}1098			wf("(s []ent.Ent) []*%s {\n", e.sname)1099			wf("  v := make([]*%s, len(s))\n", e.sname)1100			wf("  for i := 0; i < len(s); i++ {\n")1101			wf("    v[i] = s[i].(*%s)\n", e.sname)1102			wf("  }\n")1103			wf("  return v\n")1104			wf("}\n")1105			return nil1106		})1107	return fname, err1108}1109func (g *Codegen) genEntDecode(e *EntInfo, mname string) error {1110	g.f("\n// %s populates fields from a decoder\n", mname)1111	g.f("func (e *%s) %s(c ent.Decoder) (id, version uint64) {\n", e.sname, mname)1112	g.s("  for {\n")1113	g.s("    switch string(c.Key()) {\n")1114	g.s("    case \"\": return\n")1115	g.s("    case ent.FieldNameId:  id = c.Uint(64)\n")1116	g.s("    case ent.FieldNameVersion:  version = c.Uint(64)\n")1117	for _, field := range e.fields {1118		g.pushPos(field.pos)1119		g.f("    case %#v:\n", field.name)1120		err := g.codegenDecodeField(field)1121		g.popPos()1122		if err != nil {1123			return err1124		}1125	}1126	g.s("    default:  c.Discard()\n")1127	g.s("    }\n")1128	g.s("  }\n")1129	g.s("  return\n")1130	g.s("}\n")1131	return nil1132}1133func (g *Codegen) genEntDecodePartial(e *EntInfo, mname string) error {1134	var indexedFields []*EntField1135	for _, field := range e.fields {1136		if field.storageIndex != nil {1137			indexedFields = append(indexedFields, field)1138		}1139	}1140	g.f("\n// %s is used internally by ent.Storage during updates.\n", mname)1141	g.f("func (e *%s) %s(c ent.Decoder, fields ent.FieldSet) (version uint64) {\n", e.sname, mname)1142	g.f("  for n := %d; n > 0; {\n", len(indexedFields))1143	g.s("    switch string(c.Key()) {\n")1144	g.s("    case \"\": return\n")1145	g.s("    case ent.FieldNameVersion: version = c.Uint(64); continue\n")1146	for _, field := range indexedFields {1147		g.pushPos(field.pos)1148		g.f("    case %#v:\n", field.name)1149		g.s("      n--\n")1150		g.f("      if fields.Has(%d) {\n", field.index)1151		err := g.codegenDecodeField(field)1152		g.s("        continue\n")1153		g.s("      }\n")1154		g.popPos()1155		if err != nil {1156			return err1157		}1158	}1159	g.s("    }\n")1160	g.s("    c.Discard()\n")1161	g.s("  }\n")1162	g.s("  return\n")1163	g.s("}\n")1164	return nil1165}1166// âââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ1167// collectFieldIndexes builds EntFieldIndex for all indexes defined by field tags.1168// The returned list is sorted on name1169func (g *Codegen) collectFieldIndexes(fields []*EntField) []*EntFieldIndex {1170	// check field tags and pick out fields with an index1171	m := make(map[string]*EntFieldIndex, len(fields))1172	addIndex := func(index *EntFieldIndex) *EntFieldIndex {1173		x := m[index.name]1174		if x == nil {1175			m[index.name] = index1176			x = index1177		} else {1178			x.flags |= index.flags1179			x.fields = append(x.fields, index.fields[0])1180		}1181		return x1182	}1183	for _, field := range fields {1184		if len(field.tags) == 0 {1185			continue1186		}1187		g.pushPos(field.pos)1188		for _, tag := range field.tags {1189			// tag="key=foo=bar"  =>  key="key", val="foo=bar"1190			// tag="key"          =>  key="key", val="fieldname"1191			key, val := tag, field.name1192			if i := strings.IndexByte(key, '='); i != -1 {1193				val = key[i+1:]1194				key = key[:i]1195			}1196			key = strings.ToLower(key)1197			var index *EntFieldIndex1198			switch key {1199			case "index":1200				index = &EntFieldIndex{name: val}1201			case "unique":1202				index = &EntFieldIndex{name: val, flags: fieldIndexUnique}1203			case "":1204				// silently ignore1205			default:1206				g.logSrcWarn("unknown field tag %q on field %s; ignoring", tag, field.sname)1207			}1208			if index != nil {1209				if field.storageIndex != nil {1210					g.logSrcErr("multiple indexes defined for field %s", field.sname)1211				} else {1212					index.fields = []*EntField{field}1213					field.storageIndex = addIndex(index)1214				}1215			}1216		}1217		g.popPos()1218	}1219	if len(m) == 0 {1220		return nil1221	}1222	// sort by name1223	indexes := make([]*EntFieldIndex, 0, len(m))1224	for _, x := range m {1225		indexes = append(indexes, x)1226	}1227	sort.Sort(EntFieldIndexes(indexes))1228	// assign table indices1229	for i, x := range indexes {1230		x.index = i1231	}...

lex.go

Source:lex.go

...104func (j *json) newOperator(name string, params []any) any {105	if name == "" {106		return nil // an operator error is in progress107	}108	opPos := j.popPos()109	op, err := j.getOperator(Operator{Name: name, Params: params}, opPos)110	if err != nil {111		j.fatal(err.Error(), opPos)112		return nil113	}114	return op115}116func (j *json) pushPos(pos Position) {117	j.stackPos = append(j.stackPos, pos)118}119func (j *json) popPos() Position {120	last := len(j.stackPos) - 1121	pos := j.stackPos[last]122	j.stackPos = j.stackPos[:last]123	return pos124}125func (j *json) moveHoriz(bytes int, runes ...int) {126	j.pos = j.pos.incHoriz(bytes, runes...)127	j.curSize = 0128}129func (j *json) getOperator(operator Operator, opPos Position) (any, error) {130	if j.opts.OpFn == nil {131		return nil, fmt.Errorf("unknown operator %q", operator.Name)132	}133	return j.opts.OpFn(operator, opPos)...

popPos

Using AI Code Generation

1import (2func main() {3    var jsonBlob = []byte(`[4        {"Name": "Platypus", "Order": "Monotremata"},5        {"Name": "Quoll",    "Order": "Dasyuromorphia"}6    type Animal struct {7    }8    err := json.Unmarshal(jsonBlob, &animals)9    if err != nil {10        fmt.Println("error:", err)11    }12    fmt.Printf("%+v13    animals = animals[:len(animals)-1]14    fmt.Printf("%+v15}16[{{Name:Platypus Order:Monotremata} {Name:Quoll Order:Dasyuromorphia}}]17[{{Name:Platypus Order:Monotremata}}]

popPos

Using AI Code Generation

1import (2func main() {3	j.pushPos(1,2)4	j.pushPos(3,4)5	j.pushPos(5,6)6	j.pushPos(7,8)7	j.pushPos(9,10)8	j.pushPos(11,12)9	j.pushPos(13,14)10	j.pushPos(15,16)11	j.pushPos(17,18)12	j.pushPos(19,20)13	j.pushPos(21,22)14	j.pushPos(23,24)15	j.pushPos(25,26)16	j.pushPos(27,28)17	j.pushPos(29,30)18	j.pushPos(31,32)19	j.pushPos(33,34)20	j.pushPos(35,36)21	j.pushPos(37,38)22	j.pushPos(39,40)23	j.pushPos(41,42)24	j.pushPos(43,44)25	j.pushPos(45,46)26	j.pushPos(47,48)27	j.pushPos(49,50)28	j.pushPos(51,52)29	j.pushPos(53,54)30	j.pushPos(55,56)31	j.pushPos(57,58)32	j.pushPos(59,60)33	j.pushPos(61,62)34	j.pushPos(63,64)35	j.pushPos(65,66)36	j.pushPos(67,68)37	j.pushPos(69,70)38	j.pushPos(71,72)39	j.pushPos(73,74)40	j.pushPos(75,76)41	j.pushPos(77,78)42	j.pushPos(79,80)43	j.pushPos(81,82)44	j.pushPos(83,84)45	j.pushPos(85,86)46	j.pushPos(87,88)47	j.pushPos(89,90)48	j.pushPos(91,92)49	j.pushPos(93,94)50	j.pushPos(95,96)51	j.pushPos(97,98)52	j.pushPos(99,100)53	j.pushPos(101,102)54	j.pushPos(103,104)55	j.pushPos(105,106)56	j.pushPos(107,108)57	j.pushPos(109,110)58	j.pushPos(111,112)59	j.pushPos(113,114)60	j.pushPos(115,116)61	j.pushPos(117,118)62	j.pushPos(119

popPos

Using AI Code Generation

1import (2func main() {3    jsonString := `{"name":"John","age":30,"cars":["Ford","BMW","Fiat"]}`4    byteArray := []byte(jsonString)5    json := json.NewDecoder(byteArray)6    fmt.Println(json.PopPos())

popPos

Using AI Code Generation

1import "fmt"2import "encoding/json"3func main() {4    js = []byte(`{"a": 1, "b": 2}`)5    fmt.Println(js)6    fmt.Println(js.popPos())7}8import "fmt"9import "encoding/json"10func main() {11    js = []byte(`{"a": 1, "b": 2}`)12    fmt.Println(js)13    fmt.Println(js.popPos())14}15import "fmt"16import "encoding/json"17func main() {18    js = []byte(`{"a": 1, "b": 2}`)19    fmt.Println(js)20    fmt.Println(js.popPos())21}22import "fmt"23import "encoding/json"24func main() {25    js = []byte(`{"a": 1, "b": 2}`)26    fmt.Println(js)27    fmt.Println(js.popPos())28}29import "fmt"30import "encoding/json"31func main() {32    js = []byte(`{"a": 1, "b": 2}`)33    fmt.Println(js)34    fmt.Println(js.popPos())35}36import "fmt"37import "encoding/json"38func main() {39    js = []byte(`{"a": 1, "b": 2}`)40    fmt.Println(js)41    fmt.Println(js.popPos())42}43import "fmt"44import "encoding/json"45func main() {46    js = []byte(`{"a": 1, "b": 2}`)47    fmt.Println(js)48    fmt.Println(js.popPos())49}

popPos

Using AI Code Generation

1import (2func main() {3json := []byte(`{"id":1,"name":"golang","age":6}`)4id, err := jsonparser.GetInt(json, "id")5if err != nil {6fmt.Println(err)7}8fmt.Println(id)9name, err := jsonparser.GetString(json, "name")10if err != nil {11fmt.Println(err)12}13fmt.Println(name)14age, err := jsonparser.GetInt(json, "age")15if err != nil {16fmt.Println(err)17}18fmt.Println(age)19}20jsonparser.popPos(data []byte, pos []int, keys ...string) (value []byte, dataType jsonparser.ValueType, offset int, err error)21import (22func main() {23json := []byte(`{"id":1,"name":"golang","age":6}`)24id, err := jsonparser.GetInt(json, "id")25if err != nil {26fmt.Println(err)27}28fmt.Println(id)29name, err := jsonparser.GetString(json, "name")30if err != nil {31fmt.Println(err)32}33fmt.Println(name)34age, err := jsonparser.GetInt(json, "age")35if err != nil {36fmt.Println(err)37}38fmt.Println(age)39}40jsonparser.popArray(data []byte, keys ...string) (value []byte, dataType jsonparser.ValueType, offset int, err error)41import (

Automation Testing Tutorials

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