604 lines
20 KiB
JavaScript
604 lines
20 KiB
JavaScript
/*
|
|
* disj := conj "|" disj
|
|
* | conj
|
|
*
|
|
* conj := cmp "&" conj
|
|
* | cmpEq
|
|
*
|
|
* cmpEq := cmpRel "=" cmpEq
|
|
* | cmpRel "?=" prim
|
|
* | cmpRel "!=" cmpEq
|
|
*
|
|
* cmpRel := sum "<=" cmpRel
|
|
* | sum "<" cmpRel
|
|
* | sum ">" cmpRel
|
|
* | sum ">=" cmpRel
|
|
* | sum
|
|
*
|
|
* sum := prod "+" sum
|
|
* | prod "-" sum
|
|
* | prod
|
|
*
|
|
* prod := exp "*" prod
|
|
* | exp "/" prod
|
|
* | exp
|
|
*
|
|
* exp := unary "^" exp
|
|
* | unary
|
|
*
|
|
* unary := "-" unary
|
|
* | "!" unary
|
|
* | prim
|
|
*
|
|
* prim := nLit
|
|
* | bLit
|
|
* | sLit
|
|
* | ident "(" [disj ["," disj...]] ")"
|
|
* | ident
|
|
* | "(" disj ")"
|
|
*/
|
|
|
|
// a list of tokens indexed by a single pointer
|
|
class TokenList {
|
|
constructor(tokens) {
|
|
this.tokens = tokens;
|
|
this.ptr = 0;
|
|
}
|
|
|
|
get here() {
|
|
if (this.ptr >= this.tokens.length) throw new Error('Reached end of expression');
|
|
return this.tokens[this.ptr];
|
|
}
|
|
|
|
advance(steps = 1) {
|
|
this.ptr = Math.min(this.ptr + steps, this.tokens.length);
|
|
}
|
|
}
|
|
|
|
// type casts
|
|
function checkBool(v) {
|
|
if (typeof v !== 'boolean') throw new Error(`Expected boolean, but got ${typeof v}`);
|
|
return v;
|
|
}
|
|
|
|
function checkNum(v) {
|
|
if (typeof v !== 'number') throw new Error(`Expected number, but got ${typeof v}`);
|
|
return v;
|
|
}
|
|
|
|
function checkStr(v) {
|
|
if (typeof v !== 'string') throw new Error(`Expected string, but got ${typeof v}`);
|
|
return v;
|
|
}
|
|
|
|
// properties of items that can be looked up
|
|
const itemQueryProps = (function() {
|
|
const props = {};
|
|
function prop(names, getProp) {
|
|
if (Array.isArray(names)) {
|
|
for (name of names) {
|
|
props[name] = getProp;
|
|
}
|
|
} else {
|
|
props[names] = getProp;
|
|
}
|
|
}
|
|
function maxId(names, idKey) {
|
|
prop(names, (i, ie) => ie.get('maxRolls').get(idKey) || 0);
|
|
}
|
|
function minId(names, idKey) {
|
|
prop(names, (i, ie) => ie.get('minRolls').get(idKey) || 0);
|
|
}
|
|
function rangeAvg(names, getProp) {
|
|
prop(names, (i, ie) => {
|
|
const range = getProp(i, ie);
|
|
if (!range) return 0;
|
|
const ndx = range.indexOf('-');
|
|
return (parseInt(range.substring(0, ndx), 10) + parseInt(range.substring(ndx + 1), 10)) / 2;
|
|
});
|
|
}
|
|
function map(names, comps, f) {
|
|
return prop(names, (i, ie) => {
|
|
const args = [];
|
|
for (let k = 0; k < comps.length; k++) args.push(comps[k](i, ie));
|
|
return f.apply(null, args);
|
|
});
|
|
}
|
|
function sum(names, ...comps) {
|
|
return map(names, comps, (...summands) => {
|
|
let total = 0;
|
|
for (let i = 0; i < summands.length; i++) total += summands[i];
|
|
return total;
|
|
});
|
|
}
|
|
|
|
prop('name', (i, ie) => i.displayName || i.name);
|
|
prop('type', (i, ie) => i.type);
|
|
prop(['cat', 'category'], (i, ie) => i.category);
|
|
const tierIndices = { Normal: 0, Unique: 1, Set: 2, Rare: 3, Legendary: 4, Fabled: 5, Mythic: 6 };
|
|
prop(['rarityname', 'raritystr', 'tiername', 'tierstr'], (i, ie) => i.tier);
|
|
prop(['rarity', 'tier'], (i, ie) => tierIndices[i.tier]);
|
|
|
|
prop(['level', 'lvl', 'combatlevel', 'combatlvl'], (i, ie) => i.lvl);
|
|
prop(['strmin', 'strreq'], (i, ie) => i.strReq);
|
|
prop(['dexmin', 'dexreq'], (i, ie) => i.dexReq);
|
|
prop(['intmin', 'intreq'], (i, ie) => i.intReq);
|
|
prop(['defmin', 'defreq'], (i, ie) => i.defReq);
|
|
prop(['agimin', 'agireq'], (i, ie) => i.agiReq);
|
|
sum(['summin', 'sumreq', 'totalmin', 'totalreq'], props.strmin, props.dexmin, props.intmin, props.defmin, props.agimin);
|
|
|
|
prop('str', (i, ie) => i.str);
|
|
prop('dex', (i, ie) => i.dex);
|
|
prop('int', (i, ie) => i.int);
|
|
prop('def', (i, ie) => i.def);
|
|
prop('agi', (i, ie) => i.agi);
|
|
sum(['skillpoints', 'skillpts', 'attributes', 'attrs'], props.str, props.dex, props.int, props.def, props.agi);
|
|
|
|
rangeAvg(['neutraldmg', 'neutraldam', 'ndmg', 'ndam'], (i, ie) => i.nDam);
|
|
rangeAvg(['earthdmg', 'earthdam', 'edmg', 'edam'], (i, ie) => i.eDam);
|
|
rangeAvg(['thunderdmg', 'thunderdam', 'tdmg', 'tdam'], (i, ie) => i.tDam);
|
|
rangeAvg(['waterdmg', 'waterdam', 'wdmg', 'wdam'], (i, ie) => i.wDam);
|
|
rangeAvg(['firedmg', 'firedam', 'fdmg', 'fdam'], (i, ie) => i.fDam);
|
|
rangeAvg(['airdmg', 'airdam', 'admg', 'adam'], (i, ie) => i.aDam);
|
|
sum(['sumdmg', 'sumdam', 'totaldmg', 'totaldam'], props.ndam, props.edam, props.tdam, props.wdam, props.fdam, props.adam);
|
|
|
|
maxId(['earthdmg%', 'earthdam%', 'edmg%', 'edam%', 'edampct'], 'eDamPct');
|
|
maxId(['thunderdmg%', 'thunderdam%', 'tdmg%', 'tdam%', 'tdampct'], 'tDamPct');
|
|
maxId(['waterdmg%', 'waterdam%', 'wdmg%', 'wdam%', 'wdampct'], 'wDamPct');
|
|
maxId(['firedmg%', 'firedam%', 'fdmg%', 'fdam%', 'fdampct'], 'fDamPct');
|
|
maxId(['airdmg%', 'airdam%', 'admg%', 'adam%', 'adampct'], 'aDamPct');
|
|
sum(['sumdmg%', 'sumdam%', 'totaldmg%', 'totaldam%', 'sumdampct', 'totaldampct'], props.edampct, props.tdampct, props.wdampct, props.fdampct, props.adampct);
|
|
|
|
maxId(['mainatkdmg', 'mainatkdam', 'mainatkdmg%', 'mainatkdam%', 'meleedmg', 'meleedam', 'meleedmg%', 'meleedam%', 'mdpct'], 'mdPct');
|
|
maxId(['mainatkrawdmg', 'mainatkrawdam', 'mainatkneutraldmg', 'mainatkneutraldam', 'meleerawdmg', 'meleerawdam', 'meleeneutraldmg', 'meleeneutraldam', 'mdraw'], 'mdRaw');
|
|
maxId(['spelldmg', 'spelldam', 'spelldmg%', 'spelldam%', 'sdpct'], 'sdPct');
|
|
maxId(['spellrawdmg', 'spellrawdam', 'spellneutraldmg', 'spellneutraldam', 'sdraw'], 'sdRaw');
|
|
|
|
const atkSpdIndices = { SUPER_SLOW: -3, VERY_SLOW: -2, SLOW: -1, NORMAL: 0, FAST: 1, VERY_FAST: 2, SUPER_FAST: 3 };
|
|
prop(['attackspeed', 'atkspd'], (i, ie) => i.atkSpd ? atkSpdIndices[i.atkSpd] : 0);
|
|
maxId(['bonusattackspeed', 'bonusatkspd', 'attackspeedid', 'atkspdid', 'atktier'], 'atkTier');
|
|
sum(['sumattackspeed', 'totalattackspeed', 'sumatkspd', 'totalatkspd', 'sumatktier', 'totalatktier'], props.atkspd, props.atktier);
|
|
|
|
prop(['earthdef', 'edef'], (i, ie) => i.eDef || 0);
|
|
prop(['thunderdef', 'tdef'], (i, ie) => i.tDef || 0);
|
|
prop(['waterdef', 'wdef'], (i, ie) => i.wDef || 0);
|
|
prop(['firedef', 'fdef'], (i, ie) => i.fDef || 0);
|
|
prop(['airdef', 'adef'], (i, ie) => i.aDef || 0);
|
|
sum(['sumdef', 'totaldef'], props.edef, props.tdef, props.wdef, props.fdef, props.adef);
|
|
|
|
maxId(['earthdef%', 'edef%', 'edefpct'], 'eDefPct');
|
|
maxId(['thunderdef%', 'tdef%', 'tdefpct'], 'tDefPct');
|
|
maxId(['waterdef%', 'wdef%', 'wdefpct'], 'wDefPct');
|
|
maxId(['firedef%', 'fdef%', 'fdefpct'], 'fDefPct');
|
|
maxId(['airdef%', 'adef%', 'adefpct'], 'aDefPct');
|
|
sum(['sumdef%', 'totaldef%', 'sumdefpct', 'totaldefpct'], props.edefpct, props.tdefpct, props.wdefpct, props.fdefpct, props.adefpct);
|
|
|
|
prop(['health', 'hp'], (i, ie) => i.hp || 0);
|
|
maxId(['bonushealth', 'healthid', 'bonushp', 'hpid', 'hpbonus'], 'hpBonus');
|
|
sum(['sumhealth', 'sumhp', 'totalhealth', 'totalhp'], props.hp, props.hpid);
|
|
|
|
maxId(['hpregen', 'hpr', 'hr', 'hprraw'], 'hprRaw');
|
|
maxId(['hpregen%', 'hpr%', 'hr%', 'hprpct'], 'hprPct');
|
|
maxId(['lifesteal', 'ls'], 'ls');
|
|
maxId(['manaregen', 'mr'], 'mr');
|
|
maxId(['manasteal', 'ms'], 'ms');
|
|
|
|
maxId(['walkspeed', 'movespeed', 'ws', 'spd'], 'spd');
|
|
maxId('sprint', 'sprint');
|
|
maxId(['sprintregen', 'sprintreg'], 'sprintReg');
|
|
maxId(['jumpheight', 'jh'], 'jh');
|
|
|
|
minId(['spellcost1', 'rawspellcost1', 'spcost1', 'spraw1'], 'spRaw1');
|
|
minId(['spellcost1%', 'spcost1%', 'sppct1'], 'spPct1');
|
|
minId(['spellcost2', 'rawspellcost2', 'spcost2', 'spraw2'], 'spRaw2');
|
|
minId(['spellcost2%', 'spcost2%', 'sppct2'], 'spPct2');
|
|
minId(['spellcost3', 'rawspellcost3', 'spcost3', 'spraw3'], 'spRaw3');
|
|
minId(['spellcost3%', 'spcost3%', 'sppct3'], 'spPct3');
|
|
minId(['spellcost4', 'rawspellcost4', 'spcost4', 'spraw4'], 'spRaw4');
|
|
minId(['spellcost4%', 'spcost4%', 'sppct4'], 'spPct4');
|
|
sum(['sumspellcost', 'totalspellcost', 'sumrawspellcost', 'totalrawspellcost', 'sumspcost', 'totalspcost', 'sumspraw', 'totalspraw'], props.spraw1, props.spraw2, props.spraw3, props.spraw4);
|
|
sum(['sumspellcost%', 'totalspellcost%', 'sumspcost%', 'totalspcost%', 'sumsppct', 'totalsppct'], props.sppct1, props.sppct2, props.sppct3, props.sppct4);
|
|
|
|
maxId(['exploding', 'expl', 'expd'], 'expd');
|
|
maxId('poison', 'poison');
|
|
maxId('thorns', 'thorns');
|
|
maxId(['reflection', 'refl', 'ref'], 'ref');
|
|
maxId(['soulpointregen', 'spr', 'spregen'], 'spRegen');
|
|
maxId(['lootbonus', 'lb'], 'lb');
|
|
maxId(['xpbonus', 'xpb', 'xb'], 'xpb');
|
|
maxId(['stealing', 'esteal'], 'eSteal');
|
|
prop(['powderslots', 'powders', 'slots', 'sockets'], (i, ie) => i.slots || 0);
|
|
|
|
return props;
|
|
})();
|
|
|
|
// functions that can be called in query expressions
|
|
const itemQueryFuncs = {
|
|
max(args) {
|
|
if (args.length < 1) throw new Error('Not enough args to max()');
|
|
let runningMax = -Infinity;
|
|
for (let i = 0; i < args.length; i++) {
|
|
if (checkNum(args[i]) > runningMax) runningMax = args[i];
|
|
}
|
|
return runningMax;
|
|
},
|
|
min(args) {
|
|
if (args.length < 1) throw new Error('Not enough args to min()');
|
|
let runningMin = Infinity;
|
|
for (let i = 0; i < args.length; i++) {
|
|
if (checkNum(args[i]) < runningMin) runningMin = args[i];
|
|
}
|
|
return runningMin;
|
|
},
|
|
floor(args) {
|
|
if (args.length < 1) throw new Error('Not enough args to floor()');
|
|
return Math.floor(checkNum(args[0]));
|
|
},
|
|
ceil(args) {
|
|
if (args.length < 1) throw new Error('Not enough args to ceil()');
|
|
return Math.ceil(checkNum(args[0]));
|
|
},
|
|
round(args) {
|
|
if (args.length < 1) throw new Error('Not enough args to ceil()');
|
|
return Math.round(checkNum(args[0]));
|
|
},
|
|
sqrt(args) {
|
|
if (args.length < 1) throw new Error('Not enough args to ceil()');
|
|
return Math.sqrt(checkNum(args[0]));
|
|
},
|
|
abs(args) {
|
|
if (args.length < 1) throw new Error('Not enough args to ceil()');
|
|
return Math.abs(checkNum(args[0]));
|
|
},
|
|
contains(args) {
|
|
if (args.length < 2) throw new Error('Not enough args to contains()');
|
|
return checkStr(args[0]).toLowerCase().includes(checkStr(args[1]).toLowerCase());
|
|
},
|
|
atkspdmod(args) {
|
|
if (args.length < 1) throw new Error('Not enough args to atkSpdMod()');
|
|
switch (checkNum(args[0])) {
|
|
case 2: return 3.1;
|
|
case 1: return 2.5;
|
|
case 0: return 2.05;
|
|
case -1: return 1.5;
|
|
case -2: return 0.83;
|
|
}
|
|
if (args[0] <= -3) return 0.51;
|
|
if (args[0] >= 3) return 4.3;
|
|
throw new Error('Invalid argument to atkSpdMod()');
|
|
}
|
|
};
|
|
|
|
// the compiler itself
|
|
const compileQueryExpr = (function() {
|
|
// tokenize an expression string
|
|
function tokenize(exprStr) {
|
|
exprStr = exprStr.trim();
|
|
const tokens = [];
|
|
let col = 0;
|
|
function pushSymbol(sym) {
|
|
tokens.push({ type: 'sym', sym });
|
|
col += sym.length;
|
|
}
|
|
while (col < exprStr.length) {
|
|
// parse fixed symbols, like operators and stuff
|
|
switch (exprStr[col]) {
|
|
case '(':
|
|
case ')':
|
|
case ',':
|
|
case '&':
|
|
case '|':
|
|
case '+':
|
|
case '-':
|
|
case '*':
|
|
case '/':
|
|
case '^':
|
|
case '=':
|
|
pushSymbol(exprStr[col]);
|
|
continue;
|
|
case '>':
|
|
pushSymbol(exprStr[col + 1] === '=' ? '>=' : '>');
|
|
continue;
|
|
case '<':
|
|
pushSymbol(exprStr[col + 1] === '=' ? '<=' : '<');
|
|
continue;
|
|
case '!':
|
|
pushSymbol(exprStr[col + 1] === '=' ? '!=' : '!');
|
|
continue;
|
|
case ' ': // ignore extra whitespace
|
|
++col;
|
|
continue;
|
|
}
|
|
if (exprStr.slice(col, col+2) === "?=") {
|
|
pushSymbol("?=");
|
|
continue;
|
|
}
|
|
// parse a numeric literal
|
|
let m;
|
|
if ((m = /^\d+(?:\.\d*)?/.exec(exprStr.substring(col))) !== null) {
|
|
tokens.push({ type: 'num', value: parseFloat(m[0]) });
|
|
col += m[0].length;
|
|
continue;
|
|
}
|
|
// parse a string literal
|
|
if ((m = /^"([^"]+)"/.exec(exprStr.substring(col))) !== null) { // with double-quotes
|
|
tokens.push({ type: 'str', value: m[1] });
|
|
col += m[0].length;
|
|
continue;
|
|
}
|
|
if ((m = /^'([^']+)'/.exec(exprStr.substring(col))) !== null) { // with single-quotes
|
|
tokens.push({ type: 'str', value: m[1] });
|
|
col += m[0].length;
|
|
continue;
|
|
}
|
|
// parse an identifier or boolean literal
|
|
if ((m = /^\w[\w\d%]*/.exec(exprStr.substring(col))) !== null) {
|
|
switch (m[0]) {
|
|
case 'true':
|
|
tokens.push({ type: 'bool', value: true });
|
|
col += 4;
|
|
continue;
|
|
case 'false':
|
|
tokens.push({ type: 'bool', value: false });
|
|
col += 5;
|
|
continue;
|
|
}
|
|
tokens.push({ type: 'id', id: m[0] });
|
|
col += m[0].length;
|
|
continue;
|
|
}
|
|
// if we reach here without successfully parsing a token, it's an error
|
|
throw new Error(`Could not parse character "${exprStr[col]}" at position ${col}`);
|
|
}
|
|
tokens.push({ type: 'eof' });
|
|
return new TokenList(tokens);
|
|
}
|
|
|
|
// parse tokens into an ast
|
|
function takeDisj(tokens) {
|
|
const left = takeConj(tokens);
|
|
if (tokens.here.type === 'sym' && tokens.here.sym === '|') {
|
|
tokens.advance();
|
|
const right = takeDisj(tokens);
|
|
return (i, ie) => checkBool(left(i, ie)) || checkBool(right(i, ie));
|
|
}
|
|
return left;
|
|
}
|
|
|
|
function takeConj(tokens) {
|
|
const left = takeCmpEq(tokens);
|
|
if (tokens.here.type === 'sym' && tokens.here.sym === '&') {
|
|
tokens.advance();
|
|
const right = takeConj(tokens);
|
|
return (i, ie) => checkBool(left(i, ie)) && checkBool(right(i, ie));
|
|
}
|
|
return left;
|
|
}
|
|
|
|
function takeCmpEq(tokens) {
|
|
const left = takeCmpRel(tokens);
|
|
if (tokens.here.type === 'sym') {
|
|
switch (tokens.here.sym) {
|
|
case '=': {
|
|
tokens.advance();
|
|
const right = takeCmpEq(tokens);
|
|
return (i, ie) => {
|
|
const a = left(i, ie), b = right(i, ie);
|
|
if (typeof a !== typeof b) return false;
|
|
switch (typeof a) {
|
|
case 'number':
|
|
return Math.abs(left(i, ie) - right(i, ie)) < 1e-4;
|
|
case 'boolean':
|
|
return a === b;
|
|
case 'string':
|
|
return a.toLowerCase() === b.toLowerCase();
|
|
}
|
|
throw new Error('???'); // wut
|
|
};
|
|
}
|
|
case '!=': {
|
|
tokens.advance();
|
|
const right = takeCmpEq(tokens);
|
|
return (i, ie) => {
|
|
const a = left(i, ie), b = right(i, ie);
|
|
if (typeof a !== typeof b) return false;
|
|
switch (typeof a) {
|
|
case 'number':
|
|
return Math.abs(left(i, ie) - right(i, ie)) >= 1e-4;
|
|
case 'boolean':
|
|
return a !== b;
|
|
case 'string':
|
|
return a.toLowerCase() !== b.toLowerCase();
|
|
}
|
|
throw new Error('???'); // wtf
|
|
};
|
|
}
|
|
case '?=': {
|
|
tokens.advance();
|
|
const right = takePrim(tokens);
|
|
return (i, ie) => {
|
|
const a = left(i, ie), b = right(i, ie);
|
|
if (typeof a !== typeof b) return false;
|
|
switch (typeof a) {
|
|
case 'number':
|
|
return Math.abs(left(i, ie) - right(i, ie)) < 1e-4;
|
|
case 'boolean':
|
|
return a === b;
|
|
case 'string':
|
|
return a.toLowerCase().includes(b.toLowerCase());
|
|
}
|
|
throw new Error('???'); // wtf
|
|
};
|
|
}
|
|
}
|
|
}
|
|
return left;
|
|
}
|
|
|
|
function takeCmpRel(tokens) {
|
|
const left = takeSum(tokens);
|
|
if (tokens.here.type === 'sym') {
|
|
switch (tokens.here.sym) {
|
|
case '<=': {
|
|
tokens.advance();
|
|
const right = takeCmpRel(tokens);
|
|
return (i, ie) => checkNum(left(i, ie)) <= checkNum(right(i, ie));
|
|
}
|
|
case '<': {
|
|
tokens.advance();
|
|
const right = takeCmpRel(tokens);
|
|
return (i, ie) => checkNum(left(i, ie)) < checkNum(right(i, ie));
|
|
}
|
|
case '>': {
|
|
tokens.advance();
|
|
const right = takeCmpRel(tokens);
|
|
return (i, ie) => checkNum(left(i, ie)) > checkNum(right(i, ie));
|
|
}
|
|
case '>=': {
|
|
tokens.advance();
|
|
const right = takeCmpRel(tokens);
|
|
return (i, ie) => checkNum(left(i, ie)) >= checkNum(right(i, ie));
|
|
}
|
|
}
|
|
}
|
|
return left;
|
|
}
|
|
|
|
function takeSum(tokens) {
|
|
const left = takeProd(tokens);
|
|
if (tokens.here.type === 'sym') {
|
|
switch (tokens.here.sym) {
|
|
case '+': {
|
|
tokens.advance();
|
|
const right = takeSum(tokens);
|
|
return (i, ie) => checkNum(left(i, ie)) + checkNum(right(i, ie));
|
|
}
|
|
case '-': {
|
|
tokens.advance();
|
|
const right = takeSum(tokens);
|
|
return (i, ie) => checkNum(left(i, ie)) - checkNum(right(i, ie));
|
|
}
|
|
}
|
|
}
|
|
return left;
|
|
}
|
|
|
|
function takeProd(tokens) {
|
|
const left = takeExp(tokens);
|
|
if (tokens.here.type === 'sym') {
|
|
switch (tokens.here.sym) {
|
|
case '*': {
|
|
tokens.advance();
|
|
const right = takeProd(tokens);
|
|
return (i, ie) => checkNum(left(i, ie)) * checkNum(right(i, ie));
|
|
}
|
|
case '/': {
|
|
tokens.advance();
|
|
const right = takeProd(tokens);
|
|
return (i, ie) => checkNum(left(i, ie)) / checkNum(right(i, ie));
|
|
}
|
|
}
|
|
}
|
|
return left;
|
|
}
|
|
|
|
function takeExp(tokens) {
|
|
const left = takeUnary(tokens);
|
|
if (tokens.here.type === 'sym' && tokens.here.sym === '^') {
|
|
tokens.advance();
|
|
const right = takeExp(tokens);
|
|
return (i, ie) => checkNum(left(i, ie)) ** checkNum(right(i, ie));
|
|
}
|
|
return left;
|
|
}
|
|
|
|
function takeUnary(tokens) {
|
|
if (tokens.here.type === 'sym') {
|
|
switch (tokens.here.sym) {
|
|
case '-': {
|
|
tokens.advance();
|
|
const operand = takeUnary(tokens);
|
|
return (i, ie) => -checkNum(operand(i, ie));
|
|
}
|
|
case '!': {
|
|
tokens.advance();
|
|
const operand = takeUnary(tokens);
|
|
return (i, ie) => !checkBool(operand(i, ie));
|
|
}
|
|
}
|
|
}
|
|
return takePrim(tokens);
|
|
}
|
|
|
|
function takePrim(tokens) {
|
|
switch (tokens.here.type) {
|
|
case 'num': {
|
|
const lit = tokens.here.value;
|
|
tokens.advance();
|
|
return (i, ie) => lit;
|
|
}
|
|
case 'bool': {
|
|
const lit = tokens.here.value;
|
|
tokens.advance();
|
|
return (i, ie) => lit;
|
|
}
|
|
case 'str': {
|
|
const lit = tokens.here.value;
|
|
tokens.advance();
|
|
return (i, ie) => lit;
|
|
}
|
|
case 'id':
|
|
const id = tokens.here.id;
|
|
tokens.advance();
|
|
if (tokens.here.type === 'sym' && tokens.here.sym === '(') { // it's a function call
|
|
tokens.advance();
|
|
const argExprs = [];
|
|
if (tokens.here.type !== 'sym' || tokens.here.sym !== ')') {
|
|
arg_iter: // collect arg expressions, if there are any
|
|
while (true) {
|
|
argExprs.push(takeDisj(tokens));
|
|
if (tokens.here.type === 'sym') {
|
|
switch (tokens.here.sym) {
|
|
case ')':
|
|
tokens.advance();
|
|
break arg_iter;
|
|
case ',':
|
|
tokens.advance();
|
|
continue;
|
|
}
|
|
}
|
|
throw new Error(`Expected "," or ")", but got ${JSON.stringify(tokens.here)}`);
|
|
}
|
|
}
|
|
const func = itemQueryFuncs[id.toLowerCase()];
|
|
if (!func) throw new Error(`Unknown function: ${id}`);
|
|
return (i, ie) => {
|
|
const args = [];
|
|
for (let k = 0; k < argExprs.length; k++) args.push(argExprs[k](i, ie));
|
|
return func(args);
|
|
};
|
|
} else { // not a function call
|
|
const prop = itemQueryProps[id.toLowerCase()];
|
|
if (!prop) throw new Error(`Unknown property: ${id}`);
|
|
return prop;
|
|
}
|
|
case 'sym':
|
|
if (tokens.here.sym === '(') {
|
|
tokens.advance();
|
|
const expr = takeDisj(tokens);
|
|
if (tokens.here.type !== 'sym' || tokens.here.sym !== ')') throw new Error('Bracket mismatch');
|
|
tokens.advance();
|
|
return expr;
|
|
}
|
|
break;
|
|
}
|
|
throw new Error(tokens.here.type === 'eof' ? 'Reached end of expression' : `Unexpected token: ${JSON.stringify(tokens.here)}`);
|
|
}
|
|
|
|
// full compilation function, with extra safety for empty input strings
|
|
return function(exprStr) {
|
|
const tokens = tokenize(exprStr);
|
|
return tokens.tokens.length <= 1 ? null : takeDisj(tokens);
|
|
};
|
|
})();
|