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postprocess.js
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postprocess.js
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"use strict";
const { getLast } = require("../common/util");
// fix unexpected locEnd caused by --no-semi style
function postprocess(ast, options) {
visitNode(ast, node => {
switch (node.type) {
case "VariableDeclaration": {
const lastDeclaration = getLast(node.declarations);
if (lastDeclaration && lastDeclaration.init) {
overrideLocEnd(node, lastDeclaration);
}
break;
}
}
});
return ast;
/**
* - `toOverrideNode` must be the last thing in `toBeOverriddenNode`
* - do nothing if there's a semicolon on `toOverrideNode.end` (no need to fix)
*/
function overrideLocEnd(toBeOverriddenNode, toOverrideNode) {
if (options.originalText[locEnd(toOverrideNode)] === ";") {
return;
}
if (options.parser === "flow") {
toBeOverriddenNode.range = [
toBeOverriddenNode.range[0],
toOverrideNode.range[1]
];
} else {
toBeOverriddenNode.end = toOverrideNode.end;
}
toBeOverriddenNode.loc = Object.assign({}, toBeOverriddenNode.loc, {
end: toBeOverriddenNode.loc.end
});
}
function locEnd(node) {
return options.parser === "flow" ? node.range[1] : node.end;
}
}
function visitNode(node, fn) {
if (!node || typeof node !== "object") {
return;
}
if (Array.isArray(node)) {
for (const subNode of node) {
visitNode(subNode, fn);
}
return;
}
if (typeof node.type !== "string") {
return;
}
for (const key of Object.keys(node)) {
visitNode(node[key], fn);
}
fn(node);
}
module.exports = postprocess;