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this.expect("}"),this.nextToken=t,a}parseExpression(e,t){for(var a=[];;){this.mode==="math"&&this.consumeSpaces();var n=this.fetch();if(r.endOfExpression.indexOf(n.text)!==-1||t&&n.text===t||e&&L0[n.text]&&L0[n.text].infix)break;var s=this.parseAtom(t);if(s){if(s.type==="internal")continue}else break;a.push(s)}return this.mode==="text"&&this.formLigatures(a),this.handleInfixNodes(a)}handleInfixNodes(e){for(var t=-1,a,n=0;n<e.length;n++)if(e[n].type==="infix"){if(t!==-1)throw new M("only one infix operator per group",e[n].token);t=n,a=e[n].replaceWith}if(t!==-1&&a){var s,o,h=e.slice(0,t),c=e.slice(t+1);h.length===1&&h[0].type==="ordgroup"?s=h[0]:s={type:"ordgroup",mode:this.mode,body:h},c.length===1&&c[0].type==="ordgroup"?o=c[0]:o={type:"ordgroup",mode:this.mode,body:c};var p;return a==="\\\\abovefrac"?p=this.callFunction(a,[s,e[t],o],[]):p=this.callFunction(a,[s,o],[]),[p]}else return e}handleSupSubscript(e){var t=this.fetch(),a=t.text;this.consume(),this.consumeSpaces();var n=this.parseGroup(e);if(!n)throw new M("Expected group after '"+a+"'",t);return n}formatUnsupportedCmd(e){for(var t=[],a=0;a<e.length;a++)t.push({type:"textord",mode:"text",text:e[a]});var n={type:"text",mode:this.mode,body:t},s={type:"color",mode:this.mode,color:this.settings.errorColor,body:[n]};return s}parseAtom(e){var t=this.parseGroup("atom",e);if(this.mode==="text")return t;for(var a,n;;){this.consumeSpaces();var s=this.fetch();if(s.text==="\\limits"||s.text==="\\nolimits"){if(t&&t.type==="op"){var o=s.text==="\\limits";t.limits=o,t.alwaysHandleSupSub=!0}else if(t&&t.type==="operatorname")t.alwaysHandleSupSub&&(t.limits=s.text==="\\limits");else throw new M("Limit controls must follow a math operator",s);this.consume()}else if(s.text==="^"){if(a)throw new M("Double superscript",s);a=this.handleSupSubscript("superscript")}else if(s.text==="_"){if(n)throw new M("Double subscript",s);n=this.handleSupSubscript("subscript")}else if(s.text==="'"){if(a)throw new M("Double superscript",s);var h={type:"textord",mode:this.mode,text:"\\prime"},c=[h];for(this.consume();this.fetch().text==="'";)c.push(h),this.consume();this.fetch().text==="^"&&c.push(this.handleSupSubscript("superscript")),a={type:"ordgroup",mode:this.mode,body:c}}else if(Ce[s.text]){var p=gr.test(s.text),g=[];for(g.push(new p0(Ce[s.text])),this.consume();;){var y=this.fetch().text;if(!Ce[y]||gr.test(y)!==p)break;g.unshift(new p0(Ce[y])),this.consume()}var w=this.subparse(g);p?n={type:"ordgroup",mode:"math",body:w}:a={type:"ordgroup",mode:"math",body:w}}else break}return a||n?{type:"supsub",mode:this.mode,base:t,sup:a,sub:n}:t}parseFunction(e,t){var a=this.fetch(),n=a.text,s=L0[n];if(!s)return null;if(this.consume(),t&&t!=="atom"&&!s.allowedInArgument)throw new M("Got function '"+n+"' with no arguments"+(t?" as "+t:""),a);if(this.mode==="text"&&!s.allowedInText)throw new M("Can't use function '"+n+"' in text mode",a);if(this.mode==="math"&&s.allowedInMath===!1)throw new M("Can't use function '"+n+"' in math mode",a);var{args:o,optArgs:h}=this.parseArguments(n,s);return this.callFunction(n,o,h,a,e)}callFunction(e,t,a,n,s){var o={funcName:e,parser:this,token:n,breakOnTokenText:s},h=L0[e];if(h&&h.handler)return h.handler(o,t,a);throw new M("No function handler for "+e)}parseArguments(e,t){var a=t.numArgs+t.numOptionalArgs;if(a===0)return{args:[],optArgs:[]};for(var n=[],s=[],o=0;o<a;o++){var h=t.argTypes&&t.argTypes[o],c=o<t.numOptionalArgs;(t.primitive&&h==null||t.type==="sqrt"&&o===1&&s[0]==null)&&(h="primitive");var p=this.parseGroupOfType("argument to '"+e+"'",h,c);if(c)s.push(p);else if(p!=null)n.push(p);else throw new M("Null argument, please report this as a bug")}return{args:n,optArgs:s}}parseGroupOfType(e,t,a){switch(t){case"color":return this.parseColorGroup(a);case"size":return this.parseSizeGroup(a);case"url":return this.parseUrlGroup(a);case"math":case"text":return this.parseArgumentGroup(a,t);case"hbox":{var n=this.parseArgumentGroup(a,"text");return n!=null?{type:"styling",mode:n.mode,body:[n],style:"text"}:null}case"raw":{var s=this.parseStringGroup("raw",a);return s!=null?{type:"raw",mode:"text",string:s.text}:null}case"primitive":{if(a)throw new M("A primitive argument cannot be optional");var o=this.parseGroup(e);if(o==null)throw new M("Expected group as "+e,this.fetch());return o}case"original":case null:case void 0:return this.parseArgumentGroup(a);default:throw new M("Unknown group type as "+e,this.fetch())}}consumeSpaces(){for(;this.fetch().text===" ";)this.consume()}parseStringGroup(e,t){var a=this.gullet.scanArgument(t);if(a==null)return null;for(var n="",s;(s=this.fetch()).text!=="EOF";)n+=s.text,this.consume();return this.consume(),a.text=n,a}parseRegexGroup(e,t){for(var a=this.fetch(),n=a,s="",o;(o=this.fetch()).text!=="EOF"&&e.test(s+o.text);)n=o,s+=n.text,this.consume();if(s==="")throw new M("Invalid "+t+": '"+a.text+"'",a);return a.range(n,s)}parseColorGroup(e){var t=this.parseStringGroup("color",e);if(t==null)return null;var a=/^(#[a-f0-9]{3}|#?[a-f0-9]{6}|[a-z]+)$/i.exec(t.text);if(!a)throw new M("Invalid color: '"+t.text+"'",t);var n=a[0];return/^[0-9a-f]{6}$/i.test(n)&&(n="#"+n),{type:"color-token",mode:this.mode,color:n}}parseSizeGroup(e){var t,a=!1;if(this.gullet.consumeSpaces(),!e&&this.gullet.future().text!=="{"?t=this.parseRegexGroup(/^[-+]? *(?:$|\d+|\d+\.\d*|\.\d*) *[a-z]{0,2} *$/,"size"):t=this.parseStringGroup("size",e),!t)return null;!e&&t.text.length===0&&(t.text="0pt",a=!0);var n=/([-+]?) *(\d+(?:\.\d*)?|\.\d+) *([a-z]{2})/.exec(t.text);if(!n)throw new M("Invalid size: '"+t.text+"'",t);var s={number:+(n[1]+n[2]),unit:n[3]};if(!wr(s))throw new M("Invalid unit: '"+s.unit+"'",t);return{type:"size",mode:this.mode,value:s,isBlank:a}}parseUrlGroup(e){this.gullet.lexer.setCatcode("%",13),this.gullet.lexer.setCatcode("~",12);var t=this.parseStringGroup("url",e);if(this.gullet.lexer.setCatcode("%",14),this.gullet.lexer.setCatcode("~",13),t==null)return null;var a=t.text.replace(/\\([#$%&~_^{}])/g,"$1");return{type:"url",mode:this.mode,url:a}}parseArgumentGroup(e,t){var a=this.gullet.scanArgument(e);if(a==null)return null;var n=this.mode;t&&this.switchMode(t),this.gullet.beginGroup();var s=this.parseExpression(!1,"EOF");this.expect("EOF"),this.gullet.endGroup();var o={type:"ordgroup",mode:this.mode,loc:a.loc,body:s};return t&&this.switchMode(n),o}parseGroup(e,t){var a=this.fetch(),n=a.text,s;if(n==="{"||n==="\\begingroup"){this.consume();var o=n==="{"?"}":"\\endgroup";this.gullet.beginGroup();var h=this.parseExpression(!1,o),c=this.fetch();this.expect(o),this.gullet.endGroup(),s={type:"ordgroup",mode:this.mode,loc:m0.range(a,c),body:h,semisimple:n==="\\begingroup"||void 0}}else if(s=this.parseFunction(t,e)||this.parseSymbol(),s==null&&n[0]==="\\"&&!ma.hasOwnProperty(n)){if(this.settings.throwOnError)throw new M("Undefined control sequence: "+n,a);s=this.formatUnsupportedCmd(n),this.consume()}return s}formLigatures(e){for(var t=e.length-1,a=0;a<t;++a){var n=e[a],s=n.text;s==="-"&&e[a+1].text==="-"&&(a+1<t&&e[a+2].text==="-"?(e.splice(a,3,{type:"textord",mode:"text",loc:m0.range(n,e[a+2]),text:"---"}),t-=2):(e.splice(a,2,{type:"textord",mode:"text",loc:m0.range(n,e[a+1]),text:"--"}),t-=1)),(s==="'"||s==="`")&&e[a+1].text===s&&(e.splice(a,2,{type:"textord",mode:"text",loc:m0.range(n,e[a+1]),text:s+s}),t-=1)}}parseSymbol(){var e=this.fetch(),t=e.text;if(/^\\verb[^a-zA-Z]/.test(t)){this.consume();var a=t.slice(5),n=a.charAt(0)==="*";if(n&&(a=a.slice(1)),a.length<2||a.charAt(0)!==a.slice(-1))throw new M(`\\verb assertion failed --
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