luaparser 2.1.2

py lua解析器

用python编写的lua解析器和ast构建器。

它既是一个开发库，也是一个命令行工具。

$ python3.6 -m pip install luaparser

CLI Options:
  --version                     Show program's version number and exit
  -h, --help                    Show this help message and exit
  -s, --source                  Source passed in a string
  -x, --xml                     Set output format to xml
  -o, --output                  Write output to file

快速启动

处理AST树

最小示例：

fromluaparserimportastsrc="""
    local function sayHello()
      print('hello world !')
    end
    sayHello()
    """tree=ast.parse(src)print(ast.toPrettyStr(tree))

将显示：

Chunk: {} 1 key
  body: {} 1 key
    Block: {} 1 key
      body: [] 2 items
        0: {} 1 key
          LocalFunction: {} 3 keys
            name: {} 1 key
              Name: {} 1 key
                id: "sayHello"
            args: [] 0 item
            body: [] 1 item
              0: {} 1 key
                Call: {} 2 keys
                  func: {} 1 key
                    Name: {} 1 key
                      id: "print"
                  args: [] 1 item
                    0: {} 1 key
                      String: {} 1 key
                        s: "hello world !"
        1: {} 1 key
          Call: {} 2 keys
            func: {} 1 key
              Name: {} 1 key
                id: "sayHello"
            args: [] 0 item

您可以使用ast.walk（tree）：

fromluaparserimportastfromluaparserimportastnodestree=ast.parse("local foo = 'bar'")fornodeinast.walk(tree):ifisinstance(node,astnodes.Name):process(node)

或者，您可以使用节点访问者：

fromluaparserimportastfromluaparserimportastnodessrc="local a = 42"classNumberVisitor(ast.ASTVisitor):defvisit_Number(self,node):print('Number value = '+str(node.n))tree=ast.parse(src)NumberVisitor().visit(tree)

命令行

给定：

localfunctionlog(msg)print(msg)endlog("hello world !")

$ luaparser source.lua

将输出：

{"Chunk":{"body":{"Block":{"body":[{"LocalFunction":{"name":{"Name":{"id":"log"}},"args":[{"Name":{"id":"msg"}}],"body":{"Block":{"body":[{"Call":{"func":{"Name":{"id":"print"}},"args":[{"Name":{"id":"msg"}}]}}]}}}},{"Call":{"func":{"Name":{"id":"log"}},"args":[{"String":{"s":"hello world !"}}]}}]}}}}