package main

import (
	"fmt"
)

func opRead(scanner *scanProvider) value {
	s := "\n"
	for s == "\n" && scanner.Scan() {
		s = scanner.Text()
	}
	if s == "\n" {
		panic(fmt.Errorf("read: %s", errUnexpectedEndOfInput))
	}
	return &_unknown{s: `"` + s}
}

func opPrint(val1 value) value {
	fmt.Println(escapeWord(val1.String()))
	return val1
}

func opReadList(scanner *scanProvider) *_list {
	list, line := []string{}, false
	for scanner.Scan() {
		s := scanner.Text()
		if s == "\n" && line {
			break
		}
		line = true
		if s != "\n" {
			list = append(list, parseWord(`"`+s).Value())
		}
	}
	return &_list{list: list}
}