From 8f0ae9731d40ff106e230e174f79eb2b9e3e81b6 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Mon, 7 Nov 2011 12:00:38 -0500
Subject: [PATCH] Wildcard, plus parsing of it.
---
pymbolic/parser.py | 5 ++++-
pymbolic/primitives.py | 11 +++++++++++
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/pymbolic/parser.py b/pymbolic/parser.py
index 9a067df..bfc4f55 100644
--- a/pymbolic/parser.py
+++ b/pymbolic/parser.py
@@ -66,7 +66,10 @@ def parse(expr_str):
def parse_expression(pstate, min_precedence=0):
pstate.expect_not_end()
- if pstate.is_next(_minus):
+ if pstate.is_next(_times):
+ pstate.advance()
+ left_exp = primitives.Wildcard()
+ elif pstate.is_next(_minus):
pstate.advance()
left_exp = -parse_expression(pstate, _PREC_UNARY_MINUS)
elif pstate.is_next(_openpar):
diff --git a/pymbolic/primitives.py b/pymbolic/primitives.py
index 825ebd1..a04a0c5 100644
--- a/pymbolic/primitives.py
+++ b/pymbolic/primitives.py
@@ -259,6 +259,17 @@ class Variable(Leaf):
+class Wildcard(Leaf):
+ def is_equal(self, other):
+ return (other.__class__ == self.__class__
+ and self.name == other.name)
+
+ def get_hash(self):
+ return hash((self.__class__, self.name))
+
+ mapper_method = intern("map_wildcard")
+
+
class FunctionSymbol(AlgebraicLeaf):
"""Represents the name of a function.
--
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