Function invariant_or_not

MathBox/mathbox-bundle.js:79827–79839

()

    )()

    function invariant_or_not() {
      if(token.data === 'invariant') {
        if(stmt.flags & DECL_ALLOW_INVARIANT) {
          state.unshift(keyword())
          return Advance
        } else {
          return unexpected('`invariant` is not allowed here') 
        }
      } else {
        state.fake(mknode(PLACEHOLDER, {data: '', position: token.position}))
        return Advance
      }
    }

    function storage_or_not() {
      if(is_storage(token)) {