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- import {lineBreakG} from "./whitespace"
- // These are used when `options.locations` is on, for the
- // `startLoc` and `endLoc` properties.
- export class Position {
- constructor(line, col) {
- this.line = line
- this.column = col
- }
- offset(n) {
- return new Position(this.line, this.column + n)
- }
- }
- export class SourceLocation {
- constructor(p, start, end) {
- this.start = start
- this.end = end
- if (p.sourceFile !== null) this.source = p.sourceFile
- }
- }
- // 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.
- export function getLineInfo(input, offset) {
- for (let line = 1, cur = 0;;) {
- lineBreakG.lastIndex = cur
- let match = lineBreakG.exec(input)
- if (match && match.index < offset) {
- ++line
- cur = match.index + match[0].length
- } else {
- return new Position(line, offset - cur)
- }
- }
- }
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