ParserError:函数、变量、结构或修饰符声明。^

Question

pragma solidity >=0.5.0 <0.6.0;

import 'openzeppelin-solidity/contracts/token/ERC20/ERC20.sol';

 contract NautCoin is ERC20 {

  // string public constant name = 'NautCoin';
  // string public constant symbol = '0x0';
  // uint public constant decimals = 18;
  uint public timeLock = now + 1 days;
  uint256 public INITIAL_SUPPLY;
  address public player;

  constructor(address _player) 
  public {
    player = _player;
    INITIAL_SUPPLY = 10000 * (uint256(decimals()));
    // _totalSupply = INITIAL_SUPPLY;
    // _balances[player] = INITIAL_SUPPLY;
    _mint(player, INITIAL_SUPPLY);
    emit Transfer(address(0), player, INITIAL_SUPPLY);
  }
  
  function transfer(address _to, uint256 _value) public returns(bool) {
    super.transfer(_to, _value);
  }
　　
　function approve(address _spender, uint256 _value) public returns(bool) {
　  super.approve(_spender, _value);  
　}  
　  
  // Prevent the initial owner from transferring tokens until the timelock has passed
  modifier lockTokens() {
    if (msg.sender == player) {
      require(now > timeLock);
      _;
    } else {
     _;
    }
  } 
} 

如何解决此错误？

Answer 1

我刚才做了一些奇怪的疑难解答。我在里米克斯复制了这份合同，开始绞尽脑汁想知道出了什么问题。

最后，在approve函数周围似乎存在一些编译器不喜欢的奇怪的空格字符。所以只要去掉这个函数和它周围的东西，用规则的空格重写它，它就能工作了。