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How to use scanIdent method of ast Package

Best Syzkaller code snippet using ast.scanIdent

parse.go

Source:parse.go

...22	return t, err23}24func (t *Tree) parseAny() (Node, error) {25	t.scanner.accept = acceptRune26	t.scanner.mode = scanIdent | scanLbrack | scanEscape27	switch t.scanner.scan() {28	case tokenIdent:29		left := newTextNode(30			t.scanner.string(),31		)32		right, err := t.parseAny()33		switch {34		case err != nil:35			return nil, err36		case right == empty:37			return left, nil38		}39		return newListNode(left, right), nil40	case tokenEOF:41		return empty, nil42	case tokenLbrack:43		left, err := t.parseFunc()44		if err != nil {45			return nil, err46		}47		right, err := t.parseAny()48		switch {49		case err != nil:50			return nil, err51		case right == empty:52			return left, nil53		}54		return newListNode(left, right), nil55	}56	return nil, ErrBadSubstitution57}58func (t *Tree) parseFunc() (Node, error) {59	switch t.scanner.peek() {60	case '#':61		return t.parseLenFunc()62	}63	var name string64	t.scanner.accept = acceptIdent65	t.scanner.mode = scanIdent66	switch t.scanner.scan() {67	case tokenIdent:68		name = t.scanner.string()69	default:70		return nil, ErrBadSubstitution71	}72	switch t.scanner.peek() {73	case ':':74		return t.parseDefaultOrSubstr(name)75	case '=':76		return t.parseDefaultFunc(name)77	case ',', '^':78		return t.parseCasingFunc(name)79	case '/':80		return t.parseReplaceFunc(name)81	case '#':82		return t.parseRemoveFunc(name, acceptHashFunc)83	case '%':84		return t.parseRemoveFunc(name, acceptPercentFunc)85	}86	t.scanner.accept = acceptIdent87	t.scanner.mode = scanRbrack88	switch t.scanner.scan() {89	case tokenRbrack:90		return newFuncNode(name), nil91	default:92		return nil, ErrBadSubstitution93	}94}95// parse a substitution function parameter.96func (t *Tree) parseParam(accept acceptFunc, mode byte) (Node, error) {97	t.scanner.accept = accept98	t.scanner.mode = mode | scanLbrack99	switch t.scanner.scan() {100	case tokenLbrack:101		return t.parseFunc()102	case tokenIdent:103		return newTextNode(104			t.scanner.string(),105		), nil106	default:107		return nil, ErrBadSubstitution108	}109}110// parse either a default or substring substitution function.111func (t *Tree) parseDefaultOrSubstr(name string) (Node, error) {112	t.scanner.read()113	r := t.scanner.peek()114	t.scanner.unread()115	switch r {116	case '=', '-', '?', '+':117		return t.parseDefaultFunc(name)118	default:119		return t.parseSubstrFunc(name)120	}121}122// parses the ${param:offset} string function123// parses the ${param:offset:length} string function124func (t *Tree) parseSubstrFunc(name string) (Node, error) {125	node := new(FuncNode)126	node.Param = name127	t.scanner.accept = acceptOneColon128	t.scanner.mode = scanIdent129	switch t.scanner.scan() {130	case tokenIdent:131		node.Name = t.scanner.string()132	default:133		return nil, ErrBadSubstitution134	}135	// scan arg[1]136	{137		param, err := t.parseParam(rejectColonClose, scanIdent)138		if err != nil {139			return nil, err140		}141		// param.Value = t.scanner.string()142		node.Args = append(node.Args, param)143	}144	// expect delimiter or close145	t.scanner.accept = acceptColon146	t.scanner.mode = scanIdent | scanRbrack147	switch t.scanner.scan() {148	case tokenRbrack:149		return node, nil150	case tokenIdent:151		// no-op152	default:153		return nil, ErrBadSubstitution154	}155	// scan arg[2]156	{157		param, err := t.parseParam(acceptNotClosing, scanIdent)158		if err != nil {159			return nil, err160		}161		node.Args = append(node.Args, param)162	}163	return node, t.consumeRbrack()164}165// parses the ${param%word} string function166// parses the ${param%%word} string function167// parses the ${param#word} string function168// parses the ${param##word} string function169func (t *Tree) parseRemoveFunc(name string, accept acceptFunc) (Node, error) {170	node := new(FuncNode)171	node.Param = name172	t.scanner.accept = accept173	t.scanner.mode = scanIdent174	switch t.scanner.scan() {175	case tokenIdent:176		node.Name = t.scanner.string()177	default:178		return nil, ErrBadSubstitution179	}180	// scan arg[1]181	{182		param, err := t.parseParam(acceptNotClosing, scanIdent)183		if err != nil {184			return nil, err185		}186		// param.Value = t.scanner.string()187		node.Args = append(node.Args, param)188	}189	return node, t.consumeRbrack()190}191// parses the ${param/pattern/string} string function192// parses the ${param//pattern/string} string function193// parses the ${param/#pattern/string} string function194// parses the ${param/%pattern/string} string function195func (t *Tree) parseReplaceFunc(name string) (Node, error) {196	node := new(FuncNode)197	node.Param = name198	t.scanner.accept = acceptReplaceFunc199	t.scanner.mode = scanIdent200	switch t.scanner.scan() {201	case tokenIdent:202		node.Name = t.scanner.string()203	default:204		return nil, ErrBadSubstitution205	}206	// scan arg[1]207	{208		param, err := t.parseParam(acceptNotSlash, scanIdent|scanEscape)209		if err != nil {210			return nil, err211		}212		node.Args = append(node.Args, param)213	}214	// expect delimiter215	t.scanner.accept = acceptSlash216	t.scanner.mode = scanIdent217	switch t.scanner.scan() {218	case tokenIdent:219		// no-op220	default:221		return nil, ErrBadSubstitution222	}223	// check for blank string224	switch t.scanner.peek() {225	case '}':226		return node, t.consumeRbrack()227	}228	// scan arg[2]229	{230		param, err := t.parseParam(acceptNotClosing, scanIdent|scanEscape)231		if err != nil {232			return nil, err233		}234		node.Args = append(node.Args, param)235	}236	return node, t.consumeRbrack()237}238// parses the ${parameter=word} string function239// parses the ${parameter:=word} string function240// parses the ${parameter:-word} string function241// parses the ${parameter:?word} string function242// parses the ${parameter:+word} string function243func (t *Tree) parseDefaultFunc(name string) (Node, error) {244	node := new(FuncNode)245	node.Param = name246	t.scanner.accept = acceptDefaultFunc247	if t.scanner.peek() == '=' {248		t.scanner.accept = acceptOneEqual249	}250	t.scanner.mode = scanIdent251	switch t.scanner.scan() {252	case tokenIdent:253		node.Name = t.scanner.string()254	default:255		return nil, ErrBadSubstitution256	}257	// check for blank string258	switch t.scanner.peek() {259	case '}':260		return node, t.consumeRbrack()261	}262	// scan arg[1]263	{264		param, err := t.parseParam(acceptNotClosing, scanIdent)265		if err != nil {266			return nil, err267		}268		// param.Value = t.scanner.string()269		node.Args = append(node.Args, param)270	}271	return node, t.consumeRbrack()272}273// parses the ${param,} string function274// parses the ${param,,} string function275// parses the ${param^} string function276// parses the ${param^^} string function277func (t *Tree) parseCasingFunc(name string) (Node, error) {278	node := new(FuncNode)279	node.Param = name280	t.scanner.accept = acceptCasingFunc281	t.scanner.mode = scanIdent282	switch t.scanner.scan() {283	case tokenIdent:284		node.Name = t.scanner.string()285	default:286		return nil, ErrBadSubstitution287	}288	return node, t.consumeRbrack()289}290// parses the ${#param} string function291func (t *Tree) parseLenFunc() (Node, error) {292	node := new(FuncNode)293	t.scanner.accept = acceptOneHash294	t.scanner.mode = scanIdent295	switch t.scanner.scan() {296	case tokenIdent:297		node.Name = t.scanner.string()298	default:299		return nil, ErrBadSubstitution300	}301	t.scanner.accept = acceptIdent302	t.scanner.mode = scanIdent303	switch t.scanner.scan() {304	case tokenIdent:305		node.Param = t.scanner.string()306	default:307		return nil, ErrBadSubstitution308	}309	return node, t.consumeRbrack()310}311// consumeRbrack consumes a right closing bracket. If a closing312// bracket token is not consumed an ErrBadSubstitution is returned.313func (t *Tree) consumeRbrack() error {314	t.scanner.mode = scanRbrack315	if t.scanner.scan() != tokenRbrack {316		return ErrBadSubstitution...

scanIdent

Using AI Code Generation

1import (2func main() {3	fset := token.NewFileSet()4	f, err := parser.ParseFile(fset, "2.go", nil, parser.ParseComments)5	if err != nil {6		fmt.Println(err)7	}8	for _, d := range f.Decls {9		switch d := d.(type) {10			fmt.Println(d.Name.Name)11		}12	}13}

scanIdent

Using AI Code Generation

1import (2func main() {3import "fmt"4func main() {5	fmt.Println("Hello, playground")6}`7	fset := token.NewFileSet()8	f, err := parser.ParseFile(fset, "", src, parser.ParseComments)9	if err != nil {10		fmt.Println(err)11	}12	ast.Inspect(f, func(n ast.Node) bool {13		switch x := n.(type) {14			fmt.Println(x.Name)15		}16	})17}

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