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t(t,e){this.mode=void 0,this.gullet=void 0,this.settings=void 0,this.leftrightDepth=void 0,this.nextToken=void 0,this.mode="math",this.gullet=new kn(t,e,this.mode),this.settings=e,this.leftrightDepth=0}var e=t.prototype;return e.expect=function(t,e){if(void 0===e&&(e=!0),this.fetch().text!==t)throw new a("Expected '"+t+"', got '"+this.fetch().text+"'",this.fetch());e&&this.consume()},e.consume=function(){this.nextToken=null},e.fetch=function(){return null==this.nextToken&&(this.nextToken=this.gullet.expandNextToken()),this.nextToken},e.switchMode=function(t){this.mode=t,this.gullet.switchMode(t)},e.parse=function(){this.gullet.beginGroup(),this.settings.colorIsTextColor&&this.gullet.macros.set("\\color","\\textcolor");var t=this.parseExpression(!1);return this.expect("EOF"),this.gullet.endGroup(),t},e.parseExpression=function(e,r){for(var n=[];;){"math"===this.mode&&this.consumeSpaces();var o=this.fetch();if(-1!==t.endOfExpression.indexOf(o.text))break;if(r&&o.text===r)break;if(e&&ln[o.text]&&ln[o.text].infix)break;var i=this.parseAtom(r);if(!i)break;n.push(i)}return"text"===this.mode&&this.formLigatures(n),this.handleInfixNodes(n)},e.handleInfixNodes=function(t){for(var e,r=-1,n=0;n<t.length;n++){var o=Kt(t[n],"infix");if(o){if(-1!==r)throw new a("only one infix operator per group",o.token);r=n,e=o.replaceWith}}if(-1!==r&&e){var i,l,s=t.slice(0,r),u=t.slice(r+1);return i=1===s.length&&"ordgroup"===s[0].type?s[0]:{type:"ordgroup",mode:this.mode,body:s},l=1===u.length&&"ordgroup"===u[0].type?u[0]:{type:"ordgroup",mode:this.mode,body:u},[this.callFunction(e,"\\\\abovefrac"===e?[i,t[r],l]:[i,l],[])]}return t},e.handleSupSubscript=function(e){var r=this.fetch(),n=r.text;this.consume();var o=this.parseGroup(e,!1,t.SUPSUB_GREEDINESS,void 0,void 0,!0);if(!o)throw new a("Expected group after '"+n+"'",r);return o},e.formatUnsupportedCmd=function(t){for(var e=[],r=0;r<t.length;r++)e.push({type:"textord",mode:"text",text:t[r]});return{type:"color",mode:this.mode,color:this.settings.errorColor,body:[{type:"text",mode:this.mode,body:e}]}},e.parseAtom=function(t){var e,r,n=this.parseGroup("atom",!1,null,t);if("text"===this.mode)return n;for(;;){this.consumeSpaces();var o=this.fetch();if("\\limits"===o.text||"\\nolimits"===o.text){var i=Kt(n,"op");if(i)i.limits="\\limits"===o.text,i.alwaysHandleSupSub=!0;else{if(!(i=Kt(n,"operatorname"))||!i.alwaysHandleSupSub)throw new a("Limit controls must follow a math operator",o);i.limits="\\limits"===o.text}this.consume()}else if("^"===o.text){if(e)throw new a("Double superscript",o);e=this.handleSupSubscript("superscript")}else if("_"===o.text){if(r)throw new a("Double subscript",o);r=this.handleSupSubscript("subscript")}else{if("'"!==o.text)break;if(e)throw new a("Double superscript",o);var l={type:"textord",mode:this.mode,text:"\\prime"},s=[l];for(this.consume();"'"===this.fetch().text;)s.push(l),this.consume();"^"===this.fetch().text&&s.push(this.handleSupSubscript("superscript")),e={type:"ordgroup",mode:this.mode,body:s}}}return e||r?{type:"supsub",mode:this.mode,base:n,sup:e,sub:r}:n},e.parseFunction=function(t,e,r){var n=this.fetch(),o=n.text,i=ln[o];if(!i)return null;if(this.consume(),null!=r&&i.greediness<=r)throw new a("Got function '"+o+"' with no arguments"+(e?" as "+e:""),n);if("text"===this.mode&&!i.allowedInText)throw new a("Can't use function '"+o+"' in text mode",n);if("math"===this.mode&&!1===i.allowedInMath)throw new a("Can't use function '"+o+"' in math mode",n);var l=this.parseArguments(o,i);return this.callFunction(o,l.args,l.optArgs,n,t)},e.callFunction=function(t,e,r,n,o){var i=ln[t];if(i&&i.handler)return i.handler({funcName:t,parser:this,token:n,breakOnTokenText:o},e,r);throw new a("No function handler for "+t)},e.parseArguments=function(t,e){var r=e.numArgs+e.numOptionalArgs;if(0===r)return{args:[],optArgs:[]};for(var n=e.greediness,o=[],i=[],l=0;l<r;l++){var s=l<e.numOptionalArgs,u=this.parseGroupOfType("argument to '"+t+"'",e.argTypes&&e.argTypes[l],s,n,l>0&&!s||0===l&&!s&&"math"===this.mode);if(!u){if(s){i.push(null);continue}throw new a("Expected group after '"+t+"'",this.fetch())}(s?i:o).push(u)}return{args:o,optArgs:i}},e.parseGroupOfType=function(t,e,r,n,o){switch(e){case"color":return o&&this.consumeSpaces(),this.parseColorGroup(r);case"size":return o&&this.consumeSpaces(),this.parseSizeGroup(r);case"url":return this.parseUrlGroup(r,o);case"math":case"text":return this.parseGroup(t,r,n,void 0,e,o);case"hbox":var i=this.parseGroup(t,r,n,void 0,"text",o);return i?{type:"styling",mode:i.mode,body:[i],style:"text"}:i;case"raw":if(o&&this.consumeSpaces(),r&&"{"===this.fetch().text)return null;var l=this.parseStringGroup("raw",r,!0);if(l)return{type:"raw",mode:"text",string:l.text};throw new a("Expected raw 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