Function charSpanOfTokens

charSpanOfTokens(
    tokens: readonly FormulaToken[],
    base: number,
    lo: number,
    hi: number,
): { end: number; start: number }
The character span of tokens [lo, hi] within the text (base = the offset of token 0).
Parameters
- tokens: readonly FormulaToken[]
- base: number
- lo: number
- hi: number
Returns { end: number; start: number }