arrays - D 编程语言字符数组

Question

这听起来可能很愚蠢。但是我对 D 编程语言有一个奇怪的问题。当我尝试创建这样的新数组时:

import std.stdio;

void main()
{
    char[] variable = "value";
    writefln(variable);
}

DMD 编译器总是给我这个错误:

test.d(5): Error: cannot implicitly convert expression ("value") of type invariant(char[5u]) to char[]

知道为什么吗？我正在为 Ubuntu 使用 2.014 alpha(可用 here)。

Answer 1

我正在搜索指南的数组部分，这可能会有所帮助:

A string is an array of characters. String literals are just an easy way to write character arrays. String literals are immutable (read only).

char[] str1 = "abc";                // error, "abc" is not mutable
char[] str2 = "abc".dup;            // ok, make mutable copy
invariant(char)[] str3 = "abc";     // ok
invariant(char)[] str4 = str1;      // error, str4 is not mutable
invariant(char)[] str5 = str1.idup; // ok, make invariant copy

来自 here .