Rename operatorPrecedence to infixNotation; add optional lpar and rpar arguments to infixNotation

git-svn-id: svn://svn.code.sf.net/p/pyparsing/code/trunk@241 9bf210a0-9d2d-494c-87cf-cfb32e7dff7b

1 files changed, 7 insertions, 4 deletions

diff --git a/src/pyparsing_py3.py b/src/pyparsing_py3.py
index d427ca7..4a6bd74 100644
--- a/src/pyparsing_py3.py
+++ b/src/pyparsing_py3.py
@@ -59,7 +59,7 @@ The pyparsing module handles some of the problems that are typically vexing when
 """

 

 __version__ = "1.5.7"

-__versionTime__ = "3 August 2012 05:00"

+__versionTime__ = "17 November 2012 16:18"

 __author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"

 

 import string

@@ -89,7 +89,7 @@ __all__ = [
 'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity', 

 'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',

 'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',

-'indentedBlock', 'originalTextFor', 'ungroup',

+'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation',

 ]

 

 _MAX_INT = sys.maxsize

@@ -3346,7 +3346,7 @@ opAssoc = _Constants()
 opAssoc.LEFT = object()

 opAssoc.RIGHT = object()

 

-def operatorPrecedence( baseExpr, opList ):

+def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ):

     """Helper method for constructing grammars of expressions made up of

        operators working in a precedence hierarchy.  Operators may be unary or

        binary, left- or right-associative.  Parse actions can also be attached

@@ -3369,9 +3369,11 @@ def operatorPrecedence( baseExpr, opList ):
            - parseAction is the parse action to be associated with

               expressions matching this operator expression (the

               parse action tuple member may be omitted)

+        - lpar - expression for matching left-parentheses (default=Suppress('('))

+        - rpar - expression for matching right-parentheses (default=Suppress(')'))

     """

     ret = Forward()

-    lastExpr = baseExpr | ( Suppress('(') + ret + Suppress(')') )

+    lastExpr = baseExpr | ( lpar + ret + rpar )

     for i,operDef in enumerate(opList):

         opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4]

         if arity == 3:

@@ -3416,6 +3418,7 @@ def operatorPrecedence( baseExpr, opList ):
         lastExpr = thisExpr

     ret << lastExpr

     return ret

+operatorPrecedence = infixNotation

 

 dblQuotedString = Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\x[0-9a-fA-F]+)|(?:\\.))*"').setName("string enclosed in double quotes")

 sglQuotedString = Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\x[0-9a-fA-F]+)|(?:\\.))*'").setName("string enclosed in single quotes")