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Refine the places where void expressions are allowed

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To prevent passing down a value in every call, the flag is a member. Yes, ugly.
This commit is contained in:
Sei Lisa 2019-01-01 20:03:02 +01:00
parent 660dcff65b
commit 7bb07ecf38
1 changed files with 22 additions and 3 deletions
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25
lslopt/lslparse.py
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@ -876,6 +876,8 @@ class parser(object):
return nr(nt=CONST, t='integer', value=1 if tok0 == 'TRUE' else 0)
if tok0 == '<':
self.NextToken()
saveAllowVoid = self.allowVoid
self.allowVoid = False
val = [self.autocastcheck(self.Parse_expression(), 'float')]
self.expect(',')
self.NextToken()
@ -908,6 +910,7 @@ class parser(object):
# We defer it to a separate function.
val += self.Parse_vector_rotation_tail()
self.allowVoid = saveAllowVoid
if len(val) == 3:
return nr(nt='VECTOR', t='vector', ch=val)
@ -923,7 +926,10 @@ class parser(object):
self.NextToken()
self.expect('(')
self.NextToken()
saveAllowVoid = self.allowVoid
self.allowVoid = True
expr = self.Parse_expression()
self.allowVoid = saveAllowVoid
if expr.t not in types:
raise (EParseTypeMismatch(self) if expr.t is None
else EParseUndefined(self))
@ -989,11 +995,14 @@ class parser(object):
raise EParseTypeMismatch(self)
idxexpr = idxexpr[0]
self.NextToken()
saveAllowVoid = self.allowVoid
self.allowVoid = True
expr = self.Parse_expression()
self.allowVoid = saveAllowVoid
rtyp = expr.t
# Define aux function if it doesn't exist
# (leaves users room for writing their own replacement, e.g.
# one that fills with something other than zeros)
# one that uses something other than integer zero as filler)
if 'lazy_list_set' not in self.symtab[0]:
self.PushScope()
paramscope = self.scopeindex
@ -1158,8 +1167,6 @@ list lazy_list_set(list L, integer i, list v)
self.NextToken()
expr = self.Parse_expression()
rtyp = expr.t
if rtyp not in types:
raise EParseTypeMismatch(self)
if typ in ('integer', 'float'):
# LSL admits integer *= float (go figger).
# It acts like: lhs = (integer)((float)lhs * rhs)
@ -1614,6 +1621,9 @@ list lazy_list_set(list L, integer i, list v)
raise EParseTypeMismatch(self)
expression = nr(nt=op, t='integer', ch=[expression, rexpr])
if not self.allowVoid and expression.t not in types:
raise EParseTypeMismatch(self)
return expression
def Parse_optional_expression_list(self, expected_types = None):
@ -1635,7 +1645,10 @@ list lazy_list_set(list L, integer i, list v)
idx = 0
if self.tok[0] not in (']', ')', ';'):
while True:
saveAllowVoid = self.allowVoid
self.allowVoid = True
expr = self.Parse_expression()
self.allowVoid = saveAllowVoid
if expr.nt == 'SUBIDX' and expr.t is None:
# Don't accept an untyped lazy list in expression lists
raise EParseTypeMismatch(self)
@ -2196,7 +2209,10 @@ list lazy_list_set(list L, integer i, list v)
return decl
# If none of the above, it must be an expression.
saveAllowVoid = self.allowVoid
self.allowVoid = True
value = self.Parse_expression()
self.allowVoid = saveAllowVoid
self.expect(';')
self.NextToken()
return nr(nt='EXPR', t=value.t, ch=[value])
@ -2880,6 +2896,9 @@ list lazy_list_set(list L, integer i, list v)
# globals are allowed; if true, only already seen globals are permitted.
self.disallowglobalvars = False
# Another hack to determine where to allow void expressions.
self.allowVoid = False
# Globals and labels can be referenced before they are defined. That
# includes states.
#