public/swaggerui/swagger-ui.js
function scanPunctuator() {
        var token, str;

        token = {
            type: Token.Punctuator,
            value: '',
            lineNumber: lineNumber,
            lineStart: lineStart,
            start: index,
            end: index
        };

        // Check for most common single-character punctuators.
        str = source[index];
        switch (str) {

        case '(':
            if (extra.tokenize) {
                extra.openParenToken = extra.tokenValues.length;
            }
            ++index;
            break;

        case '{':
            if (extra.tokenize) {
                extra.openCurlyToken = extra.tokenValues.length;
            }
            state.curlyStack.push('{');
            ++index;
            break;

        case '.':
            ++index;
            if (source[index] === '.' && source[index + 1] === '.') {
                // Spread operator: ...
                index += 2;
                str = '...';
            }
            break;

        case '}':
            ++index;
            state.curlyStack.pop();
            break;
        case ')':
        case ';':
        case ',':
        case '[':
        case ']':
        case ':':
        case '?':
        case '~':
            ++index;
            break;

        default:
            // 4-character punctuator.
            str = source.substr(index, 4);
            if (str === '>>>=') {
                index += 4;
            } else {

                // 3-character punctuators.
                str = str.substr(0, 3);
                if (str === '===' || str === '!==' || str === '>>>' ||
                    str === '<<=' || str === '>>=') {
                    index += 3;
                } else {

                    // 2-character punctuators.
                    str = str.substr(0, 2);
                    if (str === '&&' || str === '||' || str === '==' || str === '!=' ||
                        str === '+=' || str === '-=' || str === '*=' || str === '/=' ||
                        str === '++' || str === '--' || str === '<<' || str === '>>' ||
                        str === '&=' || str === '|=' || str === '^=' || str === '%=' ||
                        str === '<=' || str === '>=' || str === '=>') {
                        index += 2;
                    } else {

                        // 1-character punctuators.
                        str = source[index];
                        if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {
                            ++index;
                        }
                    }
                }
            }
        }

        if (index === token.start) {
            throwUnexpectedToken();
        }

        token.end = index;
        token.value = str;
        return token;
    }
function scanPunctuator() {
        var token, str;

        token = {
            type: Token.Punctuator,
            value: '',
            lineNumber: lineNumber,
            lineStart: lineStart,
            start: index,
            end: index
        };

        // Check for most common single-character punctuators.
        str = source[index];
        switch (str) {

        case '(':
            if (extra.tokenize) {
                extra.openParenToken = extra.tokenValues.length;
            }
            ++index;
            break;

        case '{':
            if (extra.tokenize) {
                extra.openCurlyToken = extra.tokenValues.length;
            }
            state.curlyStack.push('{');
            ++index;
            break;

        case '.':
            ++index;
            if (source[index] === '.' && source[index + 1] === '.') {
                // Spread operator: ...
                index += 2;
                str = '...';
            }
            break;

        case '}':
            ++index;
            state.curlyStack.pop();
            break;
        case ')':
        case ';':
        case ',':
        case '[':
        case ']':
        case ':':
        case '?':
        case '~':
            ++index;
            break;

        default:
            // 4-character punctuator.
            str = source.substr(index, 4);
            if (str === '>>>=') {
                index += 4;
            } else {

                // 3-character punctuators.
                str = str.substr(0, 3);
                if (str === '===' || str === '!==' || str === '>>>' ||
                    str === '<<=' || str === '>>=') {
                    index += 3;
                } else {

                    // 2-character punctuators.
                    str = str.substr(0, 2);
                    if (str === '&&' || str === '||' || str === '==' || str === '!=' ||
                        str === '+=' || str === '-=' || str === '*=' || str === '/=' ||
                        str === '++' || str === '--' || str === '<<' || str === '>>' ||
                        str === '&=' || str === '|=' || str === '^=' || str === '%=' ||
                        str === '<=' || str === '>=' || str === '=>') {
                        index += 2;
                    } else {

                        // 1-character punctuators.
                        str = source[index];
                        if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {
                            ++index;
                        }
                    }
                }
            }
        }

        if (index === token.start) {
            throwUnexpectedToken();
        }

        token.end = index;
        token.value = str;
        return token;
    }
function scanPunctuator ( ) { var token , str ; token = { type : Token . Punctuator , value : '' , lineNumber : lineNumber , lineStart : lineStart , start : index , end : index } ; // Check for most common single-character punctuators. str = source [ index ] ; switch ( str ) { case '(' : if ( extra . tokenize ) { extra . openParenToken = extra . tokenValues . length ; } ++ index ; break ; case '{' : if ( extra . tokenize ) { extra . openCurlyToken = extra . tokenValues . length ; } state . curlyStack . push ( '{' ) ; ++ index ; break ; case '.' : ++ index ; if ( source [ index ] === '.' && source [ index + 1 ] === '.' ) { // Spread operator: ... index += 2 ; str = '...' ; } break ; case '}' : ++ index ; state . curlyStack . pop ( ) ; break ; case ')' : case ';' : case ',' : case '[' : case ']' : case ':' : case '?' : case '~' : ++ index ; break ; default : // 4-character punctuator. str = source . substr ( index , 4 ) ; if ( str === '>>>=' ) { index += 4 ; } else { // 3-character punctuators. str = str . substr ( 0 , 3 ) ; if ( str === '===' || str === '!==' || str === '>>>' || str === '<<=' || str === '>>=' ) { index += 3 ; } else { // 2-character punctuators. str = str . substr ( 0 , 2 ) ; if ( str === '&&' || str === '||' || str === '==' || str === '!=' || str === '+=' || str === '-=' || str === '*=' || str === '/=' || str === '++' || str === '--' || str === '<<' || str === '>>' || str === '&=' || str === '|=' || str === '^=' || str === '%=' || str === '<=' || str === '>=' || str === '=>' ) { index += 2 ; } else { // 1-character punctuators. str = source [ index ] ; if ( '<>=!+-*%&|^/' . indexOf ( str ) >= 0 ) { ++ index ; } } } } } if ( index === token . start ) { throwUnexpectedToken ( ) ; } token . end = index ; token . value = str ; return token ; }
ECMA-262 11.7 Punctuators
ECMA - 262 11 . 7 Punctuators