From b9e2a9450cd13bac541b7f83f68cb18d4a319ef8 Mon Sep 17 00:00:00 2001
From: BLUELOVETH <blueloveTH@foxmail.com>
Date: Mon, 29 May 2023 14:27:54 +0800
Subject: [PATCH] ...

---
 docs/quick-start/modules.md | 80 +++++++++++++++++++++++++++++++++++++
 docs/quick-start/wrap.md    |  6 ---
 2 files changed, 80 insertions(+), 6 deletions(-)
 create mode 100644 docs/quick-start/modules.md

diff --git a/docs/quick-start/modules.md b/docs/quick-start/modules.md
new file mode 100644
index 00000000..4f67f75d
--- /dev/null
+++ b/docs/quick-start/modules.md
@@ -0,0 +1,80 @@
+---
+icon: dot
+label: 'Create modules'
+order: 50
+---
+
+Modules are stored in `vm->_modules` and `vm->_lazy_modules`.
+They are both dict-like objects.
+
+### Lazy modules
+
+A lazy module is a python source file.
+It is compiled and executed when it is imported.
+Use `[]` operator to add a lazy module.
+
+```cpp
+vm->_lazy_modules["test"] = "pi = 3.14";
+```
+
+```python
+import test
+print(test.pi)  # 3.14
+```
+
+### Native modules
+
+A native module is a module written in c++ or mixed c++/python.
+Native modules are always compiled and executed when the VM is created.
+
+To creata a native module,
+use `vm->new_module(...)`.
+
+```cpp
+PyObject* mod = vm->new_module("test");
+mod->attr().set("pi", VAR(3.14));
+
+vm->bind_func<2>(mod, "add", [](VM* vm, ArgsView args){
+    i64 a = CAST(i64, args[0]);
+    i64 b = CAST(i64, args[1]);
+    return VAR(a + b);
+});
+```
+
+```python
+import test
+print(test.pi)  # 3.14
+print(test.add(1, 2))  # 3
+```
+
+
+### Module resolution
+
+When you do `import` a module, the VM will try to find it in the following order:
+
+1. Search `vm->_modules`, if found, return it.
+2. Search `vm->_lazy_modules`, if found, compile and execute it, then return it.
+3. Search `vm->_path` and try to load it from file system.
+
+
+### Filesystem hook
+
+You can use `set_read_file_cwd` to provide a custom filesystem hook, which is used for `import` (3rd step).
+The default implementation is:
+
+```cpp
+set_read_file_cwd([](const Str& name){
+    std::filesystem::path path(name.sv());
+    bool exists = std::filesystem::exists(path);
+    if(!exists) return Bytes();
+    std::string cname = name.str();
+    FILE* fp = fopen(cname.c_str(), "rb");
+    if(!fp) return Bytes();
+    fseek(fp, 0, SEEK_END);
+    std::vector<char> buffer(ftell(fp));
+    fseek(fp, 0, SEEK_SET);
+    fread(buffer.data(), 1, buffer.size(), fp);
+    fclose(fp);
+    return Bytes(std::move(buffer));
+});
+```
\ No newline at end of file
diff --git a/docs/quick-start/wrap.md b/docs/quick-start/wrap.md
index b917c57b..276f7355 100644
--- a/docs/quick-start/wrap.md
+++ b/docs/quick-start/wrap.md
@@ -67,12 +67,6 @@ struct Vector2 {
             Vector2& other = CAST(Vector2&, args[1]);
             return VAR(self.x == other.x && self.y == other.y);
         });
-
-        vm->bind_method<1>(type, "__ne__", [](VM* vm, ArgsView args){
-            Vector2& self = CAST(Vector2&, args[0]);
-            Vector2& other = CAST(Vector2&, args[1]);
-            return VAR(self.x != other.x || self.y != other.y);
-        });
     }
 };