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How to use TryConsume method of kconfig Package

Best Syzkaller code snippet using kconfig.TryConsume

kconfig.go

Source:kconfig.go

...144}145func (kp *kconfigParser) parseFile() {146	for kp.nextLine() {147		kp.parseLine()148		if kp.TryConsume("#") {149			_ = kp.ConsumeLine()150		}151	}152	kp.endCurrent()153}154func (kp *kconfigParser) parseLine() {155	if kp.eol() {156		return157	}158	if kp.helpIdent != 0 {159		if kp.identLevel() >= kp.helpIdent {160			_ = kp.ConsumeLine()161			return162		}163		kp.helpIdent = 0164	}165	if kp.TryConsume("#") {166		_ = kp.ConsumeLine()167		return168	}169	if kp.TryConsume("$") {170		_ = kp.Shell()171		return172	}173	ident := kp.Ident()174	if kp.TryConsume("=") || kp.TryConsume(":=") {175		// Macro definition, see:176		// https://www.kernel.org/doc/html/latest/kbuild/kconfig-macro-language.html177		// We don't use this for anything now.178		kp.ConsumeLine()179		return180	}181	kp.parseMenu(ident)182}183func (kp *kconfigParser) parseMenu(cmd string) {184	switch cmd {185	case "source":186		file, ok := kp.TryQuotedString()187		if !ok {188			file = kp.ConsumeLine()189		}190		kp.includeSource(file)191	case "mainmenu":192		kp.pushCurrent(&Menu{193			Kind:    MenuConfig,194			prompts: []prompt{{text: kp.QuotedString()}},195		})196	case "comment":197		kp.newCurrent(&Menu{198			Kind:    MenuComment,199			prompts: []prompt{{text: kp.QuotedString()}},200		})201	case "menu":202		kp.pushCurrent(&Menu{203			Kind:    MenuGroup,204			prompts: []prompt{{text: kp.QuotedString()}},205		})206	case "if":207		kp.pushCurrent(&Menu{208			Kind:      MenuGroup,209			visibleIf: kp.parseExpr(),210		})211	case "choice":212		kp.pushCurrent(&Menu{213			Kind: MenuChoice,214		})215	case "endmenu", "endif", "endchoice":216		kp.popCurrent()217	case "config", "menuconfig":218		kp.newCurrent(&Menu{219			Kind: MenuConfig,220			Name: kp.Ident(),221		})222	default:223		kp.parseConfigType(cmd)224	}225}226func (kp *kconfigParser) parseConfigType(typ string) {227	cur := kp.current()228	switch typ {229	case "tristate":230		cur.Type = TypeTristate231		kp.tryParsePrompt()232	case "def_tristate":233		cur.Type = TypeTristate234		kp.parseDefaultValue()235	case "bool":236		cur.Type = TypeBool237		kp.tryParsePrompt()238	case "def_bool":239		cur.Type = TypeBool240		kp.parseDefaultValue()241	case "int":242		cur.Type = TypeInt243		kp.tryParsePrompt()244	case "def_int":245		cur.Type = TypeInt246		kp.parseDefaultValue()247	case "hex":248		cur.Type = TypeHex249		kp.tryParsePrompt()250	case "def_hex":251		cur.Type = TypeHex252		kp.parseDefaultValue()253	case "string":254		cur.Type = TypeString255		kp.tryParsePrompt()256	case "def_string":257		cur.Type = TypeString258		kp.parseDefaultValue()259	default:260		kp.parseProperty(typ)261	}262}263func (kp *kconfigParser) parseProperty(prop string) {264	cur := kp.current()265	switch prop {266	case "prompt":267		kp.tryParsePrompt()268	case "depends":269		kp.MustConsume("on")270		cur.dependsOn = exprAnd(cur.dependsOn, kp.parseExpr())271	case "visible":272		kp.MustConsume("if")273		cur.visibleIf = exprAnd(cur.visibleIf, kp.parseExpr())274	case "select", "imply":275		_ = kp.Ident()276		if kp.TryConsume("if") {277			_ = kp.parseExpr()278		}279	case "option":280		// It can be 'option foo', or 'option bar="BAZ"'.281		kp.ConsumeLine()282	case "modules":283	case "optional":284	case "default":285		kp.parseDefaultValue()286	case "range":287		_, _ = kp.parseExpr(), kp.parseExpr() // from, to288		if kp.TryConsume("if") {289			_ = kp.parseExpr()290		}291	case "help", "---help---":292		// Help rules are tricky: end of help is identified by smaller indentation level293		// as would be rendered on a terminal with 8-column tabs setup, minus empty lines.294		for kp.nextLine() {295			if kp.eol() {296				continue297			}298			kp.helpIdent = kp.identLevel()299			kp.ConsumeLine()300			break301		}302	default:303		kp.failf("unknown line")304	}305}306func (kp *kconfigParser) includeSource(file string) {307	kp.newCurrent(nil)308	file = kp.expandString(file)309	file = filepath.Join(kp.baseDir, file)310	data, err := ioutil.ReadFile(file)311	if err != nil {312		kp.failf("%v", err)313		return314	}315	kp.includes = append(kp.includes, kp.parser)316	kp.parser = newParser(data, file)317	kp.parseFile()318	err = kp.err319	kp.parser = kp.includes[len(kp.includes)-1]320	kp.includes = kp.includes[:len(kp.includes)-1]321	if kp.err == nil {322		kp.err = err323	}324}325func (kp *kconfigParser) pushCurrent(m *Menu) {326	kp.endCurrent()327	kp.cur = m328	kp.stack = append(kp.stack, m)329}330func (kp *kconfigParser) popCurrent() {331	kp.endCurrent()332	if len(kp.stack) < 2 {333		kp.failf("unbalanced endmenu")334		return335	}336	last := kp.stack[len(kp.stack)-1]337	kp.stack = kp.stack[:len(kp.stack)-1]338	top := kp.stack[len(kp.stack)-1]339	last.Parent = top340	top.Elems = append(top.Elems, last)341}342func (kp *kconfigParser) newCurrent(m *Menu) {343	kp.endCurrent()344	kp.cur = m345}346func (kp *kconfigParser) current() *Menu {347	if kp.cur == nil {348		kp.failf("config property outside of config")349		return &Menu{}350	}351	return kp.cur352}353func (kp *kconfigParser) endCurrent() {354	if kp.cur == nil {355		return356	}357	if len(kp.stack) == 0 {358		kp.failf("unbalanced endmenu")359		return360	}361	top := kp.stack[len(kp.stack)-1]362	if top != kp.cur {363		kp.cur.Parent = top364		top.Elems = append(top.Elems, kp.cur)365	}366	kp.cur = nil367}368func (kp *kconfigParser) tryParsePrompt() {369	if str, ok := kp.TryQuotedString(); ok {370		prompt := prompt{371			text: str,372		}373		if kp.TryConsume("if") {374			prompt.cond = kp.parseExpr()375		}376		kp.current().prompts = append(kp.current().prompts, prompt)377	}378}379func (kp *kconfigParser) parseDefaultValue() {380	def := defaultVal{val: kp.parseExpr()}381	if kp.TryConsume("if") {382		def.cond = kp.parseExpr()383	}384	kp.current().defaults = append(kp.current().defaults, def)385}386func (kp *kconfigParser) expandString(str string) string {387	str = strings.Replace(str, "$(SRCARCH)", kp.target.KernelHeaderArch, -1)388	str = strings.Replace(str, "$SRCARCH", kp.target.KernelHeaderArch, -1)389	return str390}...

expr.go

Source:expr.go

...110// This is somewhat strange semantics and here it is implemented as simply being left-associative.111// For now it does not matter since we do not evaluate expressions.112func (p *parser) parseExpr() expr {113	ex := p.parseExprAnd()114	for p.TryConsume("||") {115		ex = &exprBin{116			op:  opOr,117			lex: ex,118			rex: p.parseExprAnd(),119		}120	}121	return ex122}123func (p *parser) parseExprAnd() expr {124	ex := p.parseExprCmp()125	for p.TryConsume("&&") {126		ex = &exprBin{127			op:  opAnd,128			lex: ex,129			rex: p.parseExprCmp(),130		}131	}132	return ex133}134func (p *parser) parseExprCmp() expr {135	ex := p.parseExprTerm()136	for {137		op := opNop138		switch {139		case p.TryConsume("="):140			op = opEq141		case p.TryConsume("!="):142			op = opNe143		case p.TryConsume("<="):144			op = opLe145		case p.TryConsume(">="):146			op = opGe147		case p.TryConsume("<"):148			op = opLt149		case p.TryConsume(">"):150			op = opGt151		}152		if op == opNop {153			break154		}155		ex = &exprBin{156			op:  op,157			lex: ex,158			rex: p.parseExprTerm(),159		}160	}161	return ex162}163func (p *parser) parseExprTerm() expr {164	if p.TryConsume("$") {165		return &exprShell{166			cmd: p.Shell(),167		}168	}169	if str, ok := p.TryQuotedString(); ok {170		return &exprString{171			val: str,172		}173	}174	if p.TryConsume("!") {175		return &exprNot{176			ex: p.parseExprTerm(),177		}178	}179	if p.TryConsume("(") {180		ex := p.parseExpr()181		p.MustConsume(")")182		return ex183	}184	return &exprIdent{185		name: p.Ident(),186	}187}...

TryConsume

Using AI Code Generation

1import "fmt"2import "github.com/andlabs/ui"3import "github.com/andlabs/ui/winmanifest"4func main() {5    ui.Main(func() {6        ui.OnShouldQuit(func() bool {7            ui.Quit()8        })9        win := ui.NewWindow("Hello, world!", 200, 100, false)10        win.SetMargined(true)11        entry := ui.NewEntry()12        button := ui.NewButton("Click")13        vbox := ui.NewVerticalBox()14        vbox.SetPadded(true)15        vbox.Append(entry, false)16        vbox.Append(button, false)17        win.SetChild(vbox)18        button.OnClicked(func() {19            fmt.Println(entry.Text())20        })21        win.OnClosing(func(*ui.Window) bool {22            ui.Quit()23        })24        win.Show()25    })26}27import "fmt"28import "github.com/andlabs/ui"29import "github.com/andlabs/ui/winmanifest"30func main() {31    ui.Main(func() {32        ui.OnShouldQuit(func() bool {33            ui.Quit()34        })35        win := ui.NewWindow("Hello, world!", 200, 100, false)36        win.SetMargined(true)37        entry := ui.NewEntry()38        button := ui.NewButton("Click")39        vbox := ui.NewVerticalBox()40        vbox.SetPadded(true)41        vbox.Append(entry, false)42        vbox.Append(button, false)43        win.SetChild(vbox)44        button.OnClicked(func() {45            fmt.Println(entry.Text())46        })47        win.OnClosing(func(*ui.Window) bool {48            ui.Quit()49        })50        win.Show()51    })52}53import "fmt"54import "github.com/andlabs/ui"55import "github.com/andlabs/ui/winmanifest"56func main() {57    ui.Main(func() {58        ui.OnShouldQuit(func() bool {59            ui.Quit()60        })61        win := ui.NewWindow("Hello, world!", 200, 100, false)62        win.SetMargined(true)63        entry := ui.NewEntry()64        button := ui.NewButton("Click")

TryConsume

Using AI Code Generation

1import (2func main() {3    k := kconfig.NewKconfig()4    k.LoadConfigFile("/home/abc/def/ghi.config")5    k.TryConsume("abc")6    k.TryConsume("def")7    k.TryConsume("ghi")8    k.TryConsume("jkl")9    k.TryConsume("mno")10    k.TryConsume("pqr")11    k.TryConsume("stu")12    k.TryConsume("vwx")13    k.TryConsume("yza")14    k.TryConsume("bcd")15    k.TryConsume("efg")16    k.TryConsume("hij")17    k.TryConsume("klm")18    k.TryConsume("nop")19    k.TryConsume("qrs")20    k.TryConsume("tuv")21    k.TryConsume("wxy")22    k.TryConsume("zab")23    k.TryConsume("cde")24    k.TryConsume("fgh")25    k.TryConsume("ijk")26    k.TryConsume("lmn")27    k.TryConsume("opq")28    k.TryConsume("rst")29    k.TryConsume("uvw")30    k.TryConsume("xyz")31    k.TryConsume("abc")32    k.TryConsume("def")33    k.TryConsume("ghi")34    k.TryConsume("jkl")35    k.TryConsume("mno")36    k.TryConsume("pqr")37    k.TryConsume("stu")38    k.TryConsume("vwx")39    k.TryConsume("yza")40    k.TryConsume("bcd")41    k.TryConsume("efg")42    k.TryConsume("hij")43    k.TryConsume("klm")44    k.TryConsume("nop")45    k.TryConsume("qrs")46    k.TryConsume("tuv")47    k.TryConsume("wxy")48    k.TryConsume("zab")49    k.TryConsume("cde")50    k.TryConsume("fgh")51    k.TryConsume("ijk")52    k.TryConsume("lmn")53    k.TryConsume("opq")54    k.TryConsume("rst")55    k.TryConsume("uvw")56    k.TryConsume("xyz")57    k.TryConsume("abc

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