从零开始，打造一款属于自己的JavaScript编程语言
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.markdown-body h3:before { border-bottom: 2px solid rgba(77, 208, 225, 1); width: 100%; content: ""; display: block; height: 28px; position: absolute; left: 0; top: 0; bottom: -2px; margin: auto; background-size: 28px 28px; background-image: url("data:image/png;base64,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"); background-repeat: no-repeat; animation: 2s infinite alternate h3animationbefore }
@keyframes h3AnimationBefore { 0% { width: 28px } 25% { width: 100% } 50% { width: 100% } 100% { width: 100% } }
.markdown-body h3:after { content: ""; display: block; width: 28px; height: 28px; position: absolute; border: 2px solid rgba(77, 208, 225, 1); border-radius: 50%; right: -15px; top: 0; bottom: 0; margin: auto; background-size: 28px 28px; background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAABRklEQVRYR2NkGGDAOMD2M4w6YDQERkNg+ITAppcfY/8zMv3wF+NdTUrZQpUQ2PT6cz8Dw/8CkMWMDIwNvqK8jcQ6gmIHNN19EaXPx1XPyMCghrCUKcpPlGc5MY6gyAE+Fx52MjL8j3cU5a1UYWXtZGBkEAVb+p8hxU+Mby5NHQCxnKEMaskzJ37uFmUetkmMjAzrfUX4woixHBJlZAA0y2EmPPYU4enLkhGeQIqRJDsAh+UgO7duNpD3IcVykkOA2paT5ABaWE60A2hlOdEO8D3/4CMDIyMfWvySFefoaYSoROh74eFXBgYGLiTNVLGc+BC48PAnAwMDG9QBVLOcaAd8P5ox+x/jf5AjGLgYfnwnKqv9/8/PwPO/kFF/MSj0cAKiouD/0bgYoixFU8RovWgJIX1EOYCQIZTIjzpgNARGQ2DAQwAAvHBaIdB7zxsAAAAASUVORK5CYII="); animation: 2s infinite alternate h3animationafter }
@keyframes h3AnimationAfter { 0% { } 10% { } 50% { transform: rotate(-1turn) } 100% { transform: rotate(-1turn) } }
.markdown-body h4 { font-size: 16px }
.markdown-body h5 { font-size: 15px }
.markdown-body h6 { margin-top: 5px }
.markdown-body p { line-height: inherit; margin: 22px 0; letter-spacing: 2px; font-size: 14px; word-spacing: 2px }
.markdown-body img { max-width: 80%; border-radius: 6px; display: block; margin: 20px auto !important; object-fit: contain; box-shadow: 0 0 16px rgba(110, 110, 110, 0.45) }
.markdown-body figcaption { display: block; font-size: 13px; color: rgba(43, 43, 43, 1) }
.markdown-body figcaption:before { content: ""; background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgBAMAAACBVGfHAAAAGFBMVEVHcExAuPtAuPpAuPtAuPpAuPtAvPxAuPokzOX5AAAAB3RSTlMAkDLqNegkoiUM7wAAAGBJREFUKM9jYBhcgMkBTUDVBE1BeDGqEtXychNUBeXlKEqACsrLQxB8lnCQQClCiWt5OYoSiAIkJVAF5eVBqAqAShTAAs7l5ShKWMwRAmAlSArASpAVgJUkCqIAscESHwCVVjMBK9JnbQAAAABJRU5ErkJggg=="); display: inline-block; width: 18px; height: 18px; background-size: 18px; background-repeat: no-repeat; background-position: center; margin-right: 5px; margin-bottom: -5px }
.markdown-body hr { border-top: 1px solid rgba(77, 208, 225, 1); border-right: none; border-bottom: none; border-left: none; margin-top: 32px; margin-bottom: 32px }
.markdown-body del { color: rgba(77, 208, 225, 1) }
.markdown-body code { border-radius: 2px; overflow-x: auto; background-color: rgba(77, 208, 225, 0.08); color: rgba(38, 198, 218, 1); padding: 0.195em 0.4em }
.markdown-body pre { font-family: Menlo, Monaco, Consolas, Courier New, monospace; overflow: auto; position: relative; line-height: 1.75; box-shadow: 0 0 8px rgba(110, 110, 110, 0.45); border-radius: 4px; margin: 16px }
.markdown-body pre:before { content: ""; display: block; height: 30px; width: 100%; margin-bottom: -7px; background: url("data:image/png;base64,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") 10px 10px / 40px no-repeat }
.markdown-body pre>code { font-size: 12px; padding: 15px 12px; margin: 0; word-break: normal; display: block; overflow-x: auto; color: rgba(51, 51, 51, 1); background: rgba(248, 248, 248, 1) }
.markdown-body a { color: rgba(77, 208, 225, 1); border-bottom: 1px solid rgba(77, 208, 225, 1); font-weight: 400; text-decoration: none; margin: 0 4px }
.markdown-body a:active, .markdown-body a:hover { background-color: rgba(77, 208, 225, 0.1) }
.markdown-body strong { color: rgba(38, 198, 218, 1) }
.markdown-body strong:before { content: "「" }
.markdown-body strong:after { content: "」" }
.markdown-body em { font-style: normal; color: rgba(77, 208, 225, 1); font-weight: 700 }
.markdown-body table { display: inline-block !important; font-size: 12px; width: auto; max-width: 100%; overflow: auto; border: 1px solid rgba(246, 246, 246, 1) }
.markdown-body thead { background: rgba(246, 246, 246, 1); color: rgba(0, 0, 0, 1); text-align: left }
.markdown-body tr:nth-child(2n) { background-color: rgba(77, 208, 225, 0.05) }
.markdown-body td, .markdown-body th { padding: 12px 7px; line-height: 24px }
.markdown-body td { min-width: 120px }
.markdown-body blockquote { margin: 2em 0; padding: 24px 32px; border-left: 4px solid rgba(38, 198, 218, 1); background: rgba(77, 208, 225, 0.15); position: relative }
.markdown-body blockquote:before { content: "❝"; top: 8px; left: 8px; color: rgba(77, 208, 225, 1); font-size: 30px; line-height: 1; font-weight: 700; position: absolute; opacity: 0.7 }
.markdown-body blockquote:after { content: "❞"; font-size: 30px; position: absolute; right: 8px; bottom: 0; color: rgba(77, 208, 225, 1); opacity: 0.7 }
.markdown-body blockquote p { color: rgba(89, 89, 89, 1); line-height: 2 }
.markdown-body ol, .markdown-body ul { color: rgba(89, 89, 89, 1); padding-left: 28px }
.markdown-body ol li, .markdown-body ul li { margin-bottom: 0; list-style: inherit }
.markdown-body ol li .task-list-item, .markdown-body ul li .task-list-item { list-style: none }
.markdown-body ol li .task-list-item ol, .markdown-body ol li .task-list-item ul, .markdown-body ul li .task-list-item ol, .markdown-body ul li .task-list-item ul { margin-top: 0 }
.markdown-body ol ol, .markdown-body ol ul, .markdown-body ul ol, .markdown-body ul ul { margin-top: 3px }
.markdown-body ol li { padding-left: 6px }
@media (max-width: 720px) { .markdown-body h1 { font-size: 24px } .markdown-body h2 { font-size: 20px } .markdown-body h3 { font-size: 18px } }.markdown-body pre, .markdown-body pre>code.hljs { background: rgba(255, 255, 255, 1) }
.hljs-subst, .markdown-body pre, .markdown-body pre>code.hljs { color: rgba(67, 79, 84, 1) }
.hljs-attribute, .hljs-doctag, .hljs-keyword, .hljs-name, .hljs-selector-tag { color: rgba(0, 151, 157, 1) }
.hljs-addition, .hljs-built_in, .hljs-bullet, .hljs-code, .hljs-literal { color: rgba(211, 84, 0, 1) }
.hljs-link, .hljs-regexp, .hljs-selector-attr, .hljs-selector-pseudo, .hljs-symbol, .hljs-template-variable, .hljs-variable { color: rgba(0, 151, 157, 1) }
.hljs-deletion, .hljs-quote, .hljs-selector-class, .hljs-selector-id, .hljs-string, .hljs-template-tag, .hljs-type { color: rgba(0, 92, 95, 1) }
.hljs-section, .hljs-title { color: rgba(136, 0, 0, 1); font-weight: 700 }
.hljs-comment { color: rgba(149, 165, 166, 0.8) }
.hljs-meta-keyword { color: rgba(114, 142, 0, 1) }
.hljs-meta { color: rgba(67, 79, 84, 1) }
.hljs-emphasis { font-style: italic }
.hljs-strong { font-weight: 700 }
.hljs-function { color: rgba(114, 142, 0, 1) }
.hljs-number { color: rgba(138, 123, 82, 1) }
.markdown-body { line-height: 1.75; font-weight: 400; font-size: 15px; overflow-x: hidden; color: rgba(43, 43, 43, 1); font-family: -apple-system, system-ui, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif; background-image: linear-gradient(90deg, rgba(159, 219, 252, 0.15) 3%, rgba(0, 0, 0, 0) 0), linear-gradient(1turn, rgba(159, 219, 252, 0.15) 3%, rgba(0, 0, 0, 0) 0); background-size: 20px 20px; background-position: center }
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 { padding: 30px 0; margin-top: 35px; margin-bottom: 10px; color: rgba(77, 208, 225, 1) }
.markdown-body h1 { font-size: 30px; text-align: center; position: relative; width: max-content; margin: 0 auto }
.markdown-body h1:before { position: absolute; content: ""; z-index: -1; top: -20px; height: 100%; width: 100px; left: 0; right: 0; margin: 0 auto; background: 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@keyframes h1Animate { 0% { background-position: right bottom } 50% { background-position: right } 100% { background-position: right bottom } }
.markdown-body h2 { display: block; border-bottom: 4px solid rgba(77, 208, 225, 1); position: relative; font-size: 24px; padding: 12px 32px; margin: 30px 0 }
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.markdown-body h2:after, .markdown-body h2:before { content: ""; display: block; position: absolute; bottom: 0 }
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前言
自从JavaScript语言发展起来，它一直被广泛应用于前端和服务器端JavaScript编程。但对于那些广泛使用JavaScript语言编写的开发者们来说，它们发现一些易于将一些繁琐，令人困惑或缺乏语言特性的缺点。如果你也是其中之一，那么自己设计和实现一款JavaScript编程语言也许是你需要的。
背景介绍
在设计编程语言之前，有必要了解编程语言的基础知识。首先，编程语言需要一个语法和语义，以告诉计算机如何执行特定的操作和行为。其次，变量和数据类型是编程语言最基本的组成部分之一，它们指定变量和数据的类型和格式。最后，控制流程为程序提供了结构和逻辑。了解这些基础知识是设计编程语言的必要要求。
目的和意义
设计自己的编程语言是一个非常有趣和有价值的任务。它可以帮助掌握深层次的编程概念和技能，并促进对现有编程语言的更深入了解。此外，自己的编程语言可以根据自己的需求定制，以满足你的编程需求。
编程语言的基础知识
在构建自己的编程语言之前，需要了解编程语言基础知识，这些知识在语言设计过程中非常重要。以下是编程语言基础知识的一个简单介绍：
语法和语义
语法是编程语言的组成部分之一，它规定了编程语言编写代码的规则。语法规则通常涉及标记，标识符，关键字，运算符和操作符等元素。
语义是编程语言语法的含义或解释。它定义了代码的真实意义和行为。在编程语言设计中，语义与语法一样重要。
变量和数据类型
变量和数据类型是编程语言的基础概念之一。变量用于存储值和引用，数据类型定义变量可以保存的值的类型和范围。常见数据类型包括数字，字符串，布尔值，数组，对象等。
控制流程
控制流程由条件语句，循环和跳转语句组成，用于控制程序运行的顺序和逻辑。条件语句按条件执行代码块，循环语句重复执行代码块，跳转语句控制程序的跳转。
JavaScript语言设计的概述
在进行 JavaScript 语言设计的过程中，我们需要了解 JavaScript 语言规范和标准、编程范例和模式以及面向对象编程。
语言规范和标准
JavaScript 语言规范和标准由 Ecma International 组织制定，目前最新版本是 2019 年的 ECMAScript 2019。JavaScript 语言规范和标准是用于定义最新版本的 JavaScript 的语法和语义。
编程范例和模式
编程范例和模式是共享和优化编程实践的方法和最佳实践。JavaScript 社区有大量的编程范例和模式可以参考使用。
面向对象编程
JavaScript 的面向对象编程提供对象和类的概念，使它可以进行模块化编程和代码重用。通过使用 JavaScript 对象和类，可以轻松创建错综复杂的应用程序，从而提高代码的可读性和可维护性。
打造一款属于自己的JavaScript编程语言
现在我们开始讨论如何打造一款自己的 JavaScript 编程语言。此处我们将采用 JavaScript 让这变得更容易，但实际上你可以使用其他编程语言来构建语言。
设计新的语言结构
构建自己的编程语言，首先需要定义语法和语义。这个过程需要思考编程语言的结构和特性。在设计新语言时，应考虑以下几点：
- 数据类型：确定语言将支持的数据类型。
- 变量和作用域：确定语言的变量声明和作用域规则。
- 代码块和函数：定义代码块和函数的语法和语义。
- 控制流程：实现支持条件语句和循环等控制流程的语法和语义。
下面是一个简单的 JavaScript 语言结构设计示例：
/* 定义变量 */
let integer: number = 10;
let string: string = "hello, world!";
let boolean: boolean = true;
/* 定义函数 */
function addNum(a: number, b: number): number {
return a + b;
}
/* 控制流 */
if (integer > 5) {
console.log("integer is greater than 5.");
} else {
console.log("integer is not greater than 5.");
}
在这个例子中，我们定义了三种数据类型，一个函数和一个带有条件语句的控制流语句。
实现编译器
为了使我们的自定义编程语言能够编写能够实际应用的代码，建议使用受支持的编程语言构建编译器，将定义的语言转换为实际 JavaScript 代码。以下是一个简单的编译器示例：
function compile(program) {
/* 将程序分解为语句 */
let statements = program.split(";");
/* 构建输出代码 */
let output = "";
for (let stmt of statements) {
if (stmt.startsWith("let")) {
/* 处理变量声明 */
let parts = stmt.split(" ");
let name = parts[1];
let type = parts[2];
if (type === "number") {
output += "let " + name + " = 0;";
} else if (type === "string") {
output += "let " + name + ' = "";';
} else {
output += "let " + name + " = false;";
}
} else if (stmt.startsWith("function")) {
/* 处理函数 */
let parts = stmt.split(" ");
let name = parts[1];
let params = parts[2].slice(0, -1);
output += "function " + name + "(" + params + ") {\n";
output += stmt.slice(stmt.indexOf("{") + 1, -1) + "\n";
output += "}\n";
} else if (stmt.startsWith("if")) {
/* 处理 if 语句 */
output += "if (" + stmt.slice(2, -1) + ") {\n";
output += stmt.slice(stmt.indexOf("{") + 1, -1) + "\n";
output += "}\n";
}
}
return output;
}
构建语言解释器
除了使用编译器之外，我们也可以为我们的自定义 JavaScript 编程语言编写解释器来执行程序。下面是一个简单的 JavaScript 解释器示例：
class Interpreter {
constructor() {
this.vars = {};
}
visit(node) {
if (node.type === "number") {
return Number(node.value);
} else if (node.type === "string") {
return node.value;
} else if (node.type === "bool") {
return node.value === "true";
} else if (node.type === "variable") {
return this.vars[node.value];
} else if (node.type === "assignment") {
let name = node.left.value;
let value = this.visit(node.right);
this.vars[name] = value;
} else if (node.type=== "binop" && node.op === "+") {
return this.visit(node.left) + this.visit(node.right);
} else if (node.type === "call") {
let func = node.func.value;
let args = node.args.map(arg => this.visit(arg));
if (func === "print") {
console.log(args[0]);
} else {
console.log("Unknown function: " + node.func.value);
}
}
}
interpret(program) {
let ast = parser.parse(program);
for (let stmt of ast.body) {
this.visit(stmt);
}
}
}
/\* 解析器使用示例 \*/
let interpreter = new Interpreter();
let program = 'let x = 10; let y = "hello"; print(y);';
interpreter.interpret(program);
编写总结和文档
完成JavaScript编程语言的实现后，需要编写相关文档，总结语言的特性以及如何使用该编程语言编写代码。文档应该包括以下内容：
- 该语言支持的数据类型和变量声明方式
- 该语言支持的控制流程语句
- 该语言的函数和函数调用语法
- 该语言的解释器或编译器的用法
- 一个简单的示例程序（如上面所示）
将新编程语言应用于实际项目
完成编程语言的设计和实现后，可以将新编程语言应用于实际项目，证明其实用性。以下是一个简单的项目示例：
项目案例
假设我们正在构建一个在线电商网站，并需要为用户购物篮实现一个简单的优惠代码系统。我们可以使用自己的 JavaScript 编程语言实现条件部分并应用于电商网站中。
以下是编写优惠代码的示例程序：
/\* 定义变量 \*/
let cartPrice: number = 100;
let promoCode: string = "save10";
/\* 条件语句 \*/
if (promoCode === "save10") {
cartPrice -= 10;
} else if (promoCode === "save20") {
cartPrice -= 20;
}
/\* 输出价格 \*/
console.log("Your cart price is now " + cartPrice + ".");
将该程序编译或解释为 JavaScript，可以很容易地将其应用于电商网站中。
语言特性广告和营销
通过展示新编程语言的特性和实际用例，可以提高该编程语言的知名度和流行度。我们可以通过创建有用的示例程序，编写简单的案例研究和教程，以及在社交媒体上分享该编程语言的信息来促进其广告和营销。
结论
在本教程中，我们介绍了如何从零开始打造一款自己的 JavaScript 编程语言，并提供了相关示例代码。设计和实现自己的编程语言可能是一个耗时的过程，但对于对编程充满热情的人非常有价值。
实现效果评估
在实现我们的自定义 JavaScript 编程语言之后，我们需要对其进行详细的测试和评估，以确保它的正确性、性能和可扩展性。建议给新编程语言创建一组单元和集成测试，用于测试核心功能。
成果总结
自定义编程语言的提供具有巨大的价值和创造力。通过掌握 JavaScript 的基础知识，并遵循构建编程语言的步骤，可以创建一个吸引人的、自用的和实用的 JavaScript 编程语言。
展望未来
在未来，自定义编程语言的需求将继续增长，并导致更多的程序员探索它们的潜力。新兴技术和编程范例的出现，可能会使下一代编程语言变得更加出色和先进。我们可以期望看到更多的编程语言工具和库出现，这将有助于进一步丰富编程语言的特性和功能，提高开发效率和代码质量。
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