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Minor refactor to getPrecedence #2230

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Merged
czosel merged 1 commit into from
Aug 30, 2023
Merged

Minor refactor to getPrecedence #2230

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82 changes: 40 additions & 42 deletions src/util.js
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Original file line number Diff line number Diff line change
Expand Up @@ -53,49 +53,47 @@ function printNumber(rawNumber) {
}

// http://php.net/manual/en/language.operators.precedence.php
const PRECEDENCE = {};
[
["or"],
["xor"],
["and"],
const PRECEDENCE = new Map(
[
"=",
"+=",
"-=",
"*=",
"**=",
"/=",
".=",
"%=",
"&=",
"|=",
"^=",
"<<=",
">>=",
],
["??"],
["||"],
["&&"],
["|"],
["^"],
["&"],
["==", "===", "!=", "!==", "<>", "<=>"],
["<", ">", "<=", ">="],
[">>", "<<"],
["+", "-", "."],
["*", "/", "%"],
["!"],
["instanceof"],
["++", "--", "~"],
["**"],
].forEach((tier, i) => {
tier.forEach((op) => {
PRECEDENCE[op] = i;
});
});

function getPrecedence(op) {
return PRECEDENCE[op];
["or"],
["xor"],
["and"],
[
"=",
"+=",
"-=",
"*=",
"**=",
"/=",
".=",
"%=",
"&=",
"|=",
"^=",
"<<=",
">>=",
],
["??"],
["||"],
["&&"],
["|"],
["^"],
["&"],
["==", "===", "!=", "!==", "<>", "<=>"],
["<", ">", "<=", ">="],
[">>", "<<"],
["+", "-", "."],
["*", "/", "%"],
["!"],
["instanceof"],
["++", "--", "~"],
["**"],
].flatMap((operators, index) =>
operators.map((operator) => [operator, index])
)
);
function getPrecedence(operator) {
return PRECEDENCE.get(operator);
}

const equalityOperators = ["==", "!=", "===", "!==", "<>", "<=>"];
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