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Taddeüs Kroes
trs
Commits
358e632e
Commit
358e632e
authored
May 02, 2012
by
Taddeus Kroes
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Moved n-ary operator definition to a constant list.
parent
dfd85838
Changes
2
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2 changed files
with
8 additions
and
4 deletions
+8
-4
src/node.py
src/node.py
+5
-2
src/strategy.py
src/strategy.py
+3
-2
No files found.
src/node.py
View file @
358e632e
...
...
@@ -31,6 +31,9 @@ OP_SUBSCRIPT = 8
OP_AND
=
9
OP_OR
=
10
# Binary operators that are considered n-ary
NARY_OPERATORS
=
[
OP_ADD
,
OP_SUB
,
OP_MUL
]
# N-ary (functions)
OP_INT
=
11
OP_INT_INDEF
=
12
...
...
@@ -200,7 +203,7 @@ class ExpressionBase(object):
return
exponent
==
None
or
self
[
1
]
==
exponent
def
is_nary
(
self
):
return
not
self
.
is_leaf
and
self
.
op
in
[
OP_ADD
,
OP_SUB
,
OP_MUL
]
return
not
self
.
is_leaf
and
self
.
op
in
NARY_OPERATORS
def
is_identifier
(
self
,
identifier
=
None
):
return
self
.
type
==
TYPE_IDENTIFIER
\
...
...
@@ -457,7 +460,7 @@ class ExpressionNode(Node, ExpressionBase):
if not isinstance(other, ExpressionNode) or other.op != self.op:
return False
if self.op in
(OP_ADD, OP_MUL)
:
if self.op in
NARY_OPERATORS
:
s0 = Scope(self)
s1 = set(Scope(other))
...
...
src/strategy.py
View file @
358e632e
from
node
import
OP_NEG
from
node
import
OP_NEG
,
NARY_OPERATORS
from
rules
import
RULES
from
rules.precedences
import
HIGH
,
LOW
,
RELATIVE
...
...
@@ -70,7 +70,8 @@ def depth_possibilities(node, depth=0, parent_op=None):
# Add operator-specific handlers. Prevent duplicate possibilities in
# n-ary nodes by only executing the handlers on the outermost node of
# related nodes with the same operator
if
node
.
op
!=
parent_op
and
node
.
op
in
RULES
:
if
node
.
op
in
RULES
and
(
node
.
op
!=
parent_op
\
or
node
.
op
not
in
NARY_OPERATORS
):
handlers
+=
RULES
[
node
.
op
]
# Add negation handlers after operator-specific handlers to obtain an
...
...
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