textX 2.0.1

快速介绍

下面是一个完整的示例，显示了 画画。我们还展示了如何定义自定义类、解释模型和搜索 对于特定类型的实例。

fromtextximportmetamodel_from_str,get_children_of_typegrammar="""
Model: commands*=DrawCommand;
DrawCommand: MoveCommand | ShapeCommand;
ShapeCommand: LineTo | Circle;
MoveCommand: MoveTo | MoveBy;
MoveTo: 'move' 'to' position=Point;
MoveBy: 'move' 'by' vector=Point;
Circle: 'circle' radius=INT;
LineTo: 'line' 'to' point=Point;
Point: x=INT ',' y=INT;
"""# We will provide our class for Point.# Classes for other rules will be dynamically generated.classPoint(object):def__init__(self,parent,x,y):self.parent=parentself.x=xself.y=ydef__str__(self):return"{},{}".format(self.x,self.y)def__add__(self,other):returnPoint(self.parent,self.x+other.x,self.y+other.y)# Create meta-model from the grammar. Provide `Point` class to be used for# the rule `Point` from the grammar.mm=metamodel_from_str(grammar,classes=[Point])model_str="""
    move to 5, 10
    line to 10, 10
    line to 20, 20
    move by 5, -7
    circle 10
    line to 10, 10
"""# Meta-model knows how to parse and instantiate models.model=mm.model_from_str(model_str)# At this point model is a plain Python object graph with instances of# dynamically created classes and attributes following the grammar.defcname(o):returno.__class__.__name__# Let's interpret the modelposition=Point(None,0,0)forcommandinmodel.commands:ifcname(command)=='MoveTo':print('Moving to position',command.position)position=command.positionelifcname(command)=='MoveBy':position=position+command.vectorprint('Moving by',command.vector,'to a new position',position)elifcname(command)=='Circle':print('Drawing circle at',position,'with radius',command.radius)else:print('Drawing line from',position,'to',command.point)position=command.pointprint('End position is',position)# Output:# Moving to position 5,10# Drawing line from 5,10 to 10,10# Drawing line from 10,10 to 20,20# Moving by 5,-7 to a new position 25,13# Drawing circle at 25,13 with radius 10# Drawing line from 25,13 to 10,10# Collect all points starting from the root of the modelpoints=get_children_of_type("Point",model)forpointinpoints:print('Point: {}'.format(point))# Output:# Point: 5,10# Point: 10,10# Point: 20,20# Point: 5,-7# Point: 10,10

视频教程

textx简介

在textx

中实现martin fowler的状态机dsl

文档和教程

完整的教程文档可在 http://textx.github.io/textX/stable/

IDE/编辑器中的支持

• textX-languageserver- 语言服务器协议支持任何基于textx的语言
• textX-extensions-语法 突出显示，Visual Studio代码的代码大纲
• textx.vim- textx语法的突出显示和大纲
• textx-mode- textx语法的emacs模式

讨论和帮助

有关一般问题和帮助，请使用StackOverflow。一定要在你的问题上加上 textx标记。

有关问题、建议和功能要求，请使用 GitHub issue tracker。

许可证

麻省理工学院

python版本

测试2.7、3.4+