antlr4, python 3, Parser, ParseTreePatternMatcher, compile

[jpicau]

Dear ANTLR team,

I used conda to install the antlr-python-runtime 4.7.1 package. I compiled the Lua grammar as such: antlr4 -o lua -Dlanguage=Python3 -visitor Lua.g4

I'm parsing the factorial.lua example and would like to use the tree pattern matching capabilities. The first steps were as the described in many simple examples:

from antlr4 import *
from lua import *

def main():
    input = FileStream("factorial.lua")         # antlr4
    lexer = LuaLexer(input)
    stream = CommonTokenStream(lexer)           # antlr4
    parser = LuaParser(stream)
    tree = parser.chunk()

However, the next line:

    p = parser.compileParseTreePattern("<ID>", LuaParser.RULE_exp)

gives me the following error:

AttributeError: 'ParseTreePatternMatcher' object has no attribute 'compile'

I looked into the ParseTreePatternMatcher class, but found only compileTreePattern.

Am I missing something?

Thanks, Jaroslaw

[ericvergnaud]

Hi Not sure tree pattern matching was ever ported to Python If you need it may I suggest that you look into implementing it and submit a PR if you get it working?

Envoyé de mon iPhone

Le 1 mars 2018 à 22:23, jpicau notifications@github.com a écrit :

Dear ANTLR team,

I used conda to install the antlr-python-runtime 4.7.1 package. I compiled the Lua grammar as such: antlr4 -o lua -Dlanguage=Python3 -visitor Lua.g4

I'm parsing the factorial.lua example and would like to use the tree pattern matching capabilities. The first steps were as the described in many simple examples:

from antlr4 import *
from lua import *

def main():
   input = FileStream("factorial.lua")         # antlr4
   lexer = LuaLexer(input)
   stream = CommonTokenStream(lexer)           # antlr4
   parser = LuaParser(stream)
   tree = parser.chunk()

However, the next line:

   p = parser.compileParseTreePattern("<ID>", LuaParser.RULE_exp)

gives me the following error:

AttributeError: 'ParseTreePatternMatcher' object has no attribute 'compile'

I looked into the ParseTreePatternMatcher class, but found only compileTreePattern.

Am I missing something?

Thanks, Jaroslaw

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Dear ANTLR team,

I used conda to install the antlr-python-runtime 4.7.1 package.
I compiled the Lua grammar as such:
antlr4 -o lua -Dlanguage=Python3 -visitor Lua.g4

I'm parsing the factorial.lua example and would like to use the tree pattern matching capabilities.
The first steps were as the described in many simple examples:

from antlr4 import *
from lua import *

def main():
   input = FileStream("factorial.lua")         # antlr4
   lexer = LuaLexer(input)
   stream = CommonTokenStream(lexer)           # antlr4
   parser = LuaParser(stream)
   tree = parser.chunk()

However, the next line:

    p = parser.compileParseTreePattern("<ID>", LuaParser.RULE_exp)

gives me the following error:

AttributeError: 'ParseTreePatternMatcher' object has no attribute 'compile'

I looked into the ParseTreePatternMatcher class, but found only compileTreePattern.

Am I missing something?

Thanks,
Jaroslaw

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[jpicau]

:D Thanks. I'd love to. However, I'm still too new to ANTLR. I keep working/digging and come back later ... Thanks, again.

[shuizuo]

I also have the problem and find that the Method compile was not Implemented in the Class ParseTreePatternMatcher. And so far have you solved the problem?

[jpicau]

Hi, my intention was to find all function definitons. I used Trees.findAllRuleNodes(...) instead. I don't know if this helps:

from antlr4 import *
from antlr4.tree.Trees import Trees
from lua import *

def main():

    input = FileStream("factorial.lua")         # antlr4
    lexer = LuaLexer(input)
    stream = CommonTokenStream(lexer)           # antlr4
    parser = LuaParser(stream)
    tree = parser.chunk()

    # find all function definitions
    names = Trees.findAllRuleNodes(tree, LuaParser.RULE_funcname)
    for name in names:
        funcname = name.getPayload()
        ...

Bye, Jaroslaw

[shuizuo]

@jpicau Thanks a lot, your code has given me some good ideas.

[jpicau]

Cool! You're welcome.

[80avin-sw]

@jpicau Why was this closed ? It doesn't seem like the original issue of compileParseTreePattern was ever resolved.