| 123 | see: https://en.wikipedia.org/wiki/LL_parser#Left_factoring.`},buildInvalidRuleNameError(t){return"deprecated"},buildDuplicateRuleNameError(t){let e;return t.topLevelRule instanceof Nt?e=t.topLevelRule.name:e=t.topLevelRule,`Duplicate definition, rule: ->${e}<- is already defined in the grammar: ->${t.grammarName}<-`}};function Dm(t,e){let r=new gf(t,e);return r.resolveRefs(),r.errors}var gf=class extends Ct{constructor(e,r){super(),this.nameToTopRule=e,this.errMsgProvider=r,this.errors=[]}resolveRefs(){D(Ce(this.nameToTopRule),e=>{this.currTopLevel=e,e.accept(this)})}visitNonTerminal(e){let r=this.nameToTopRule[e.nonTerminalName];if(r)e.referencedRule=r;else{let n=this.errMsgProvider.buildRuleNotFoundError(this.currTopLevel,e);this.errors.push({message:n,type:it.UNRESOLVED_SUBRULE_REF,ruleName:this.currTopLevel.name,unresolvedRefName:e.nonTerminalName})}}};var yf=class extends 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E={idx:C,def:M.definition.concat(Ke(g)),ruleStack:k,occurrenceStack:G};p.push(E)}else if(M instanceof Ae){let b=new se({definition:M.definition,idx:M.idx}),E=M.definition.concat([b],Ke(g)),H={idx:C,def:E,ruleStack:k,occurrenceStack:G};p.push(H)}else if(M instanceof $e){let b=new te({terminalType:M.separator}),E=new se({definition:[b].concat(M.definition),idx:M.idx}),H=M.definition.concat([E],Ke(g)),F={idx:C,def:H,ruleStack:k,occurrenceStack:G};p.push(F)}else if(M instanceof Re){let b={idx:C,def:Ke(g),ruleStack:k,occurrenceStack:G};p.push(b),p.push(a);let E=new te({terminalType:M.separator}),H=new se({definition:[E].concat(M.definition),idx:M.idx}),F=M.definition.concat([H],Ke(g)),ye={idx:C,def:F,ruleStack:k,occurrenceStack:G};p.push(ye)}else if(M instanceof se){let b={idx:C,def:Ke(g),ruleStack:k,occurrenceStack:G};p.push(b),p.push(a);let E=new se({definition:M.definition,idx:M.idx}),H=M.definition.concat([E],Ke(g)),F={idx:C,def:H,ruleStack:k,occurrenceStack:G};p.push(F)}else if(M 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i=[],s=Cc(e.definition);if(Z(s))return[];{let a=t.name;Pe(s,t)&&i.push({message:r.buildLeftRecursionError({topLevelRule:t,leftRecursionPath:n}),type:it.LEFT_RECURSION,ruleName:a});let c=wn(s,n.concat([t])),l=ht(c,u=>{let p=Ne(n);return p.push(u),Ef(t,u,r,p)});return i.concat(l)}}function Cc(t){let e=[];if(Z(t))return e;let r=pt(t);if(r instanceof pe)e.push(r.referencedRule);else if(r instanceof Ee||r instanceof he||r instanceof Ae||r instanceof $e||r instanceof Re||r instanceof se)e=e.concat(Cc(r.definition));else if(r instanceof xe)e=Ve(I(r.definition,s=>Cc(s.definition)));else if(!(r instanceof te))throw Error("non exhaustive match");let n=Xn(r),i=t.length>1;if(n&&i){let s=Ke(t);return e.concat(Cc(s))}else return e}var $a=class extends Ct{constructor(){super(...arguments),this.alternations=[]}visitAlternation(e){this.alternations.push(e)}};function Ym(t,e){let r=new $a;t.accept(r);let n=r.alternations;return ht(n,s=>{let a=tn(s.definition);return ht(a,(o,c)=>{let 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n=[];return D(t,i=>{let s=new vf;i.accept(s);let a=s.allProductions;D(a,o=>{let c=Aa(o),l=o.maxLookahead||e,u=o.idx,h=Vi(u,i,c,l)[0];if(Z(Ve(h))){let g=r.buildEmptyRepetitionError({topLevelRule:i,repetition:o});n.push({message:g,type:it.NO_NON_EMPTY_LOOKAHEAD,ruleName:i.name})}})}),n}function PE(t,e,r,n){let i=[],s=Ue(t,(o,c,l)=>(e.definition[l].ignoreAmbiguities===!0||D(c,u=>{let p=[l];D(t,(h,g)=>{l!==g&&Nc(h,u)&&e.definition[g].ignoreAmbiguities!==!0&&p.push(g)}),p.length>1&&!Nc(i,u)&&(i.push(u),o.push({alts:p,path:u}))}),o),[]);return I(s,o=>{let c=I(o.alts,u=>u+1);return{message:n.buildAlternationAmbiguityError({topLevelRule:r,alternation:e,ambiguityIndices:c,prefixPath:o.path}),type:it.AMBIGUOUS_ALTS,ruleName:r.name,occurrence:e.idx,alternatives:o.alts}})}function OE(t,e,r,n){let i=Ue(t,(a,o,c)=>{let l=I(o,u=>({idx:c,path:u}));return a.concat(l)},[]);return Or(ht(i,a=>{if(e.definition[a.idx].ignoreAmbiguities===!0)return[];let 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