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Parentheses around chained assignments are not necessary.

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We follow the precedence and associativity rules, though.
This commit is contained in:
Sei Lisa 2017-08-17 00:40:03 +02:00
parent 2e29cc9131
commit a2e793df02
1 changed files with 11 additions and 3 deletions
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14
lslopt/lsloutput.py
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@ -35,6 +35,7 @@ class outscript(object):
'||':1, '&&':1, '|':2, '^':3, '&':4, '==':5, '!=':5, '||':1, '&&':1, '|':2, '^':3, '&':4, '==':5, '!=':5,
'<':6, '<=':6, '>':6, '>=':6, '<<':7, '>>':7, '+':8, '-':8,# 'NEG':8, '<':6, '<=':6, '>':6, '>=':6, '<<':7, '>>':7, '+':8, '-':8,# 'NEG':8,
'*':9, '/':9, '%':9}#, '!':10, '~':10, '++':10, '--':10, } '*':9, '/':9, '%':9}#, '!':10, '~':10, '++':10, '--':10, }
assignment_ops = ('=', '+=', '-=', '*=', '/=','%=')
def Value2LSL(self, value): def Value2LSL(self, value):
tvalue = type(value) tvalue = type(value)
@ -220,7 +221,14 @@ class outscript(object):
lparen = False lparen = False
rnt = child[1]['nt'] rnt = child[1]['nt']
rparen = False rparen = False
if nt in self.op_priority: if nt in self.assignment_ops and nt in self.op_priority:
# Assignment is right-associative, so it needs to be dealt with
# separately.
base_pri = self.op_priority[nt]
if rnt in self.op_priority:
if self.op_priority[rnt] < base_pri: # should never happen
rparen = True
elif nt in self.op_priority:
base_pri = self.op_priority[nt] base_pri = self.op_priority[nt]
if lnt in self.op_priority: if lnt in self.op_priority:
if self.op_priority[lnt] < base_pri: if self.op_priority[lnt] < base_pri:
@ -228,8 +236,8 @@ class outscript(object):
elif lnt == 'NEG' and base_pri > self.op_priority['-']: elif lnt == 'NEG' and base_pri > self.op_priority['-']:
lparen = True lparen = True
# This situation has ugly cases due to the strange priority of # This situation has ugly cases due to the strange precedence
# unary minus. Consider the following two statements: # of unary minus. Consider the following two statements:
# (~-a) * a # (~-a) * a
# a * (~-a) * a # a * (~-a) * a
# In one case, the (~-a) is a left child; in the other, it's # In one case, the (~-a) is a left child; in the other, it's