datacamp / antlr-ast Goto Github PK
View Code? Open in Web Editor NEWLibrary for building abstract syntax trees from antlr parsers
License: GNU Affero General Public License v3.0
antlr-ast's People
Contributors
Stargazers
Watchers
Forkers
fossabot huntdog1541 josesaribeiro unigrammar anishmourya cyrillemidingoyi air88317 cssaheel ahmcyrcourse sdccodingantlr-ast's Issues
Please add a proper(short) readme,how to run it.
Please add a propera(short) readme,how to run it.I am trying to build a parser and lexer for vbscript,
Python2 compatability broken
>>> pip install antlr-ast; python -c 'import antlr4'
Collecting antlr-ast
Collecting antlr4-python3-runtime (from antlr-ast)
Installing collected packages: antlr4-python3-runtime, antlr-ast
Successfully installed antlr-ast-0.2.0 antlr4-python3-runtime-4.7
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/home/tom/.local/lib/python2.7/site-packages/antlr4/__init__.py", line 1, in <mo
dule>
from antlr4.Token import Token
File "/home/tom/.local/lib/python2.7/site-packages/antlr4/Token.py", line 59
def text(self, text:str):
^
SyntaxError: invalid syntax
There is a question of whether you want to still support python2. Though one imagines you might want to more clearly exclude it.
This came up when working on latex2sympy.
function for mapping visitor -> dropping tokens
For example, the tsql grammar has this little devil:
def visitSql_clauses(self, ctx):
return self.visitChildren(ctx, predicate = lambda n: not isinstance(n, Tree.TerminalNode) )
def visitSelect_list(self, ctx):
return self.visitChildren(ctx, predicate = lambda n: not isinstance(n, Tree.TerminalNode) )
def visitBracket_expression(self, ctx):
return self.visitChildren(ctx, predicate = lambda n: not isinstance(n, Tree.TerminalNode) )
def visitSubquery_expression(self, ctx):
return self.visitChildren(ctx, predicate = lambda n: not isinstance(n, Tree.TerminalNode) )
def visitBracket_search_expression(self, ctx):
return self.visitChildren(ctx, predicate = lambda n: not isinstance(n, Tree.TerminalNode) )
def visitBracket_query_expression(self, ctx):
return self.visitChildren(ctx, predicate = lambda n: not isinstance(n, Tree.TerminalNode) )
def visitBracket_table_source(self, ctx):
return self.visitChildren(ctx, predicate = lambda n: not isinstance(n, Tree.TerminalNode) )
def visitTable_alias(self, ctx):
return self.visitChildren(ctx, predicate = lambda n: not isinstance(n, Tree.TerminalNode) )
Function for mapping visitor -> AstNode classmethods
Currently, a common pattern is to repeat visitor methods like below. But could be collapsed easily.
def visitQuery_specification(self, ctx):
return SelectStmt._from_fields(self, ctx)
def visitInsert_statement(self, ctx):
return InsertStmt._from_fields(self, ctx)
def visitDelete_statement(self, ctx):
return DeleteStmt._from_fields(self, ctx)
def visitUpdate_statement(self, ctx):
return UpdateStmt._from_fields(self, ctx)
def visitUnion_query_expression(self, ctx):
return Union._from_fields(self, ctx)_get_field_names can count field multiple times
Write basic README
- building a grammar
- overview of ASTNode, Speaker
- reference to part of test that writes a parse function
- running tests
- only python3 compatible
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.