制作语言编译器时出现“std::out_of_range”错误

Question

我一直在制作一个语言编译器，但是当我运行编译器时：

./compiler file.ln

它不起作用并返回：

terminate called after throwing an instance of 'std::out_of_range'
  what():  vector::_M_range_check: __n (which is 77) >= this->size() (which is 76)
Aborted (core dumped)

提前谢谢你

顺便说一下，这是词法分析器代码（返回错误的代码）：

int main(int argc, char const *argv[]) {


    if(argc == 1) {
        std::cout << "ERROR: No input file \n\n\n";
        return 1;
    }

    std::vector<Tokens> tokensArr; 
    std::vector<Token> tokens;


    FILE *in=fopen(argv[1],"r");
    std::string fileContent;
    std::vector<char> splitCode;
    char c;
    int codeSize = 0;
    while((c=fgetc(in))!=EOF) {
        codeSize++;
        splitCode.push_back(c);
        fileContent += c;
    }
    int index = 0;
    tokens.push_back(token("", Tokens::SOF));
    while (index != codeSize)
    {
        char indexChar = splitCode.at(index);
        if(indexChar == '(') {
            tokens.push_back(*openparen);
        } else if (indexChar == ';') {
            tokens.push_back(*eol);
        } else if(indexChar == ')') {
            tokens.push_back(*closedparen);
        } else if(indexChar == '+') {
            tokens.push_back(*plus);
        } else if(indexChar == '-' ) {
            tokens.push_back(*minus);
        } else if(indexChar == '*' ) {
            tokens.push_back(*multiply);
        } else if( indexChar == '/') {
            tokens.push_back(*divide);
        } else {
            if(isdigit(indexChar)) {
                std::string num = "";

                while (index != codeSize && isdigit(indexChar)) {
                    indexChar = splitCode.at(index);
                    num += indexChar;
                    index++;
                }
            }
        }
        index++;
    }
    fclose(in);
    std::cout << "\n[";
    int i=0;
    while(i != tokens.size()) {
        std::cout << "{ val: '" << tokens.at(i).val << "' type: " << tokens.at(i).type << " }, ";
        i++;
    }
    std::cout << "]";
    std::cout << "\n";
    return 0;
}

注意：这里有一些未提及的包含库

我尝试制作一个新文件，它确实有效，但是这个文件呢？

使用此文件：

#config
(
    "type": "exec",
    "syntax": "standard"
);

#endconfig

1 * 2 / 3

它返回了错误，但使用此文件：

let x; 成功了

（这些都是我自定义的编程语言）

Answer 1

你好，又是我，一些评论给了我一些答案，但我所做的修复是：

while (index != codeSize - 1 && isdigit(indexChar)) {
                indexChar = splitCode.at(index);
                num += indexChar;
                index++;
}