Method push

packages/metro-source-map/src/generateFunctionMap.js:545–564

({name, start}: RangeMapping)

  }

  push({name, start}: RangeMapping) {
    let nameIndex = this._namesMap.get(name);
    if (typeof nameIndex !== 'number') {
      nameIndex = this._names.length;
      this._names[nameIndex] = name;
      this._namesMap.set(name, nameIndex);
    }
    const lineDelta = this._line.next(start.line);
    const firstOfLine = this._mappings.pos === 0 || lineDelta > 0;
    if (lineDelta > 0) {
      // The next entry will have the line offset, so emit just one semicolon.
      this._mappings.markLines(1);
      this._column.reset(0);
    }
    this._mappings.startSegment(this._column.next(start.column));
    this._mappings.append(this._nameIndex.next(nameIndex));
    if (firstOfLine) {
      this._mappings.append(lineDelta);
    }
  }
}

class RelativeValue {