- 使用rust 实现的一个简单的脚本语法解释器。
- 使用了 rust的nom库。
例子：
global wh = 122.3;
fn test() {
println("你说什么 sfsfs");
}
fn main()
{
s = 1 +2-3;
println(s);
println("hello world !!!");
s=7+(2-3)+(3+4);
println(s);
s=5-3+(3+4);
test();
println(s);
s=5*3 / (3+4);
println(s);
v=122.33;
println(123.2421);
println(wh);
println(v);
println("你好吗 兄弟们");
}
Tree {
root: [
GlobalParmDef {
name: "wh",
token: Zval {
type_name: Number,
float: 122.3,
string: "",
},
},
FunctionDef(
Function {
name: "test",
args: [],
content: Block {
elements: [
PrintLn {
token: Zval {
type_name: String,
float: 0.0,
string: "你说什么 sfsfs",
},
},
],
},
},
),
FunctionDef(
Function {
name: "main",
args: [],
content: Block {
elements: [
Assignment {
name: "s",
token: Express {
opcode: Subtract,
left: Express {
opcode: Add,
left: Zval {
type_name: Number,
float: 1.0,
string: "",
},
right: Zval {
type_name: Number,
float: 2.0,
string: "",
},
},
right: Zval {
type_name: Number,
float: 3.0,
string: "",
},
},
},
PrintLn {
token: Flg {
name: "s",
},
},
PrintLn {
token: Zval {
type_name: String,
float: 0.0,
string: "hello world !!!",
},
},
Assignment {
name: "s",
token: Express {
opcode: Add,
left: Express {
opcode: Add,
left: Zval {
type_name: Number,
float: 7.0,
string: "",
},
right: Express {
opcode: Subtract,
left: Zval {
type_name: Number,
float: 2.0,
string: "",
},
right: Zval {
type_name: Number,
float: 3.0,
string: "",
},
},
},
right: Express {
opcode: Add,
left: Zval {
type_name: Number,
float: 3.0,
string: "",
},
right: Zval {
type_name: Number,
float: 4.0,
string: "",
},
},
},
},
PrintLn {
token: Flg {
name: "s",
},
},
Assignment {
name: "s",
token: Express {
opcode: Add,
left: Express {
opcode: Subtract,
left: Zval {
type_name: Number,
float: 5.0,
string: "",
},
right: Zval {
type_name: Number,
float: 3.0,
string: "",
},
},
right: Express {
opcode: Add,
left: Zval {
type_name: Number,
float: 3.0,
string: "",
},
right: Zval {
type_name: Number,
float: 4.0,
string: "",
},
},
},
},
CallFunction {
name: "test",
args: [],
},
PrintLn {
token: Flg {
name: "s",
},
},
Assignment {
name: "s",
token: Express {
opcode: Divide,
left: Express {
opcode: Multiply,
left: Zval {
type_name: Number,
float: 5.0,
string: "",
},
right: Zval {
type_name: Number,
float: 3.0,
string: "",
},
},
right: Express {
opcode: Add,
left: Zval {
type_name: Number,
float: 3.0,
string: "",
},
right: Zval {
type_name: Number,
float: 4.0,
string: "",
},
},
},
},
PrintLn {
token: Flg {
name: "s",
},
},
Assignment {
name: "v",
token: Zval {
type_name: Number,
float: 122.33,
string: "",
},
},
PrintLn {
token: Zval {
type_name: Number,
float: 123.2421,
string: "",
},
},
PrintLn {
token: Flg {
name: "wh",
},
},
PrintLn {
token: Flg {
name: "v",
},
},
PrintLn {
token: Zval {
type_name: String,
float: 0.0,
string: "你好吗 兄弟们",
},
},
],
},
},
),
],
}
- 全局变量 global
- 加减乘除 + - * /
- 换行打印 println（）
- 字符串定义 " "
- 无参数 方法调用。（新支持）
- 带参数方法调用
- 类定义
- 错误提示
- 循环遍历
- if判断
- 内置函数功能实现
- 带入参数计算等。。
- ...........（待发掘）