介绍
simple script, just for fun.
详细设计访问介绍。
Syntax
Intro
基础类型: integer, float, string, hash table, lambda
基础语句: if, while, return, break, continue
工作流程图:
lexer -> parser -> SSA IR -> reg alloc -> code gen -> OPCODE -> vm
Example
function fib(n) {
if (n <= 2) {
return 1;
}
else {
return fib(n - 1) + fib(n - 2);
}
}
let n = to_integer(input("please input value:"));
let result = fib(n);
output("the result of fib(", n, ") is :", result, "\n");
FFI
提供了与C语言交互的简单方式：
// on `lib.cpp`
Object lib_output(VMState * state, size_t paramsNums);
static Lib libs[] = {
{ "output", lib_output },
// ...
{ nullptr, nullptr }
};
Object lib_output(VMState * state, size_t paramsNums)
{
VMScene *scene = state->getScene();
for (size_t idx = scene->paramsStack.size() - paramsNums;
idx < scene->paramsStack.size(); ++idx) {
Object arg = scene->paramsStack[idx];
DumpObject(arg);
}
return CreateNil();
}