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3.3 中 原始字面量不一定是右值 #102

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cathaysia opened this issue May 31, 2020 · 2 comments · Fixed by #105
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3.3 中 原始字面量不一定是右值 #102

cathaysia opened this issue May 31, 2020 · 2 comments · Fixed by #105
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@cathaysia
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实际描述

  • 文件路径：例如，book/zh-cn/03-runtime.md
  • 原文段落：
运算表达式产生的临时变量、 原始字面量、Lambda 表达式都属于纯右值。

原文表意不准确：

原始字面量并不一定是右值，比如 字符字面量，字符字面量可以被取地址，是一个左值。

参见：https://en.cppreference.com/w/cpp/language/value_category
@cathaysia
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cathaysia commented May 31, 2020 •
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更加糟糕的是，在类中的字符字面量是一个右值：

class Parent{
const char* s = &"hello"; // 此时 "hello" 为右值，无法取地址，无法通过编译
}

int main(){
    &“hello”; // 此时"hello"为左值，可以去地址，可以通过编译
}

@changkun
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PR welcome

@changkun changkun added the bug label May 31, 2020
@cathaysia cathaysia mentioned this issue Jun 2, 2020
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changkun pushed a commit that referenced this issue Jun 3, 2020
@cathaysia
book: fix incorrect string literal (#102) and a typo (#103)
3abc907
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Fix bug#102, typor#103
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@changkun @cathaysia