sucrase/dist/sucrase-babylon/util/location.js

Super-fast alternative to Babel for when you can target modern JS runtimes

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const whitespace_1 = require("./whitespace");
// These are used when `options.locations` is on, for the
// `startLoc` and `endLoc` properties.
class Position {
    constructor(line, col) {
        this.line = line;
        this.column = col;
    }
}
exports.Position = Position;
class SourceLocation {
    constructor(start, end) {
        this.start = start;
        // @ts-ignore: (may start as null, but initialized later)
        this.end = end;
    }
}
exports.SourceLocation = SourceLocation;
// The `getLineInfo` function is mostly useful when the
// `locations` option is off (for performance reasons) and you
// want to find the line/column position for a given character
// offset. `input` should be the code string that the offset refers
// into.
function getLineInfo(input, offset) {
    for (let line = 1, cur = 0;;) {
        whitespace_1.lineBreakG.lastIndex = cur;
        const match = whitespace_1.lineBreakG.exec(input);
        if (match && match.index < offset) {
            ++line;
            cur = match.index + match[0].length;
        }
        else {
            return new Position(line, offset - cur);
        }
    }
}
exports.getLineInfo = getLineInfo;