Method consume

Rewrite-Parser.beta.js:3049–3053

()

    }

    consume() {
      const token = this.tokens[this.position++]
      // console.log(`Consume: ${token.type} '${token.value}' at position ${this.position - 1}`)
      return token
    }

    expect(type, value = null) {
      const token = this.consume()