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##########################################################################
## # The Coq Proof Assistant / The Coq Development Team ##
## v # INRIA, CNRS and contributors - Copyright 1999-2018 ##
## <O___,, # (see CREDITS file for the list of authors) ##
## \VV/ ###############################################################
## // # This file is distributed under the terms of the ##
## # GNU Lesser General Public License Version 2.1 ##
## # (see LICENSE file for the text of the license) ##
##########################################################################
"""A visitor for ANTLR notation ASTs, producing plain text with ellipses.
Somewhat-closely approximates the rendering of the original manual.
"""
from io import StringIO
from .parsing import parse
from .TacticNotationsParser import TacticNotationsParser
from .TacticNotationsVisitor import TacticNotationsVisitor
class TacticNotationsToDotsVisitor(TacticNotationsVisitor):
def __init__(self):
self.buffer = StringIO()
def visitRepeat(self, ctx:TacticNotationsParser.RepeatContext):
separator = ctx.ATOM()
self.visitChildren(ctx)
if ctx.LGROUP().getText()[1] == "+":
spacer = (separator.getText() + " " if separator else "")
self.buffer.write(spacer + "…" + spacer)
self.visitChildren(ctx)
def visitCurlies(self, ctx:TacticNotationsParser.CurliesContext):
self.buffer.write("{")
self.visitChildren(ctx)
self.buffer.write("}")
def visitAtomic(self, ctx:TacticNotationsParser.AtomicContext):
self.buffer.write(ctx.ATOM().getText())
def visitHole(self, ctx:TacticNotationsParser.HoleContext):
self.buffer.write("‘{}’".format(ctx.ID().getText()[1:]))
def visitMeta(self, ctx:TacticNotationsParser.MetaContext):
self.buffer.write(ctx.METACHAR().getText()[1:])
def visitWhitespace(self, ctx:TacticNotationsParser.WhitespaceContext):
self.buffer.write(" ")
def stringify_with_ellipses(notation):
vs = TacticNotationsToDotsVisitor()
vs.visit(parse(notation))
return vs.buffer.getvalue()
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