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Report EParseReturnIsEmpty at return, EParseReturnShouldBeEmpty at expression.

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Also change idpos to savepos, for consistency, and add note on why EParseReturnShouldBeEmpty is named like that.
This commit is contained in:
Sei Lisa 2017-10-09 11:29:15 +02:00
parent 3214c553b2
commit 4ba0518353
1 changed files with 9 additions and 4 deletions
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13
lslopt/lslparse.py
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@ -85,6 +85,7 @@ class EParseTypeMismatch(EParse):
class EParseReturnShouldBeEmpty(EParse):
def __init__(self, parser):
# When the types don't match, the error es EParseTypeMismatch instead.
super(EParseReturnShouldBeEmpty, self).__init__(parser,
u"Return statement type doesn't match function return type")
@ -893,7 +894,7 @@ class parser(object):
raise EParseUEOF(self)
raise EParseSyntax(self)
name = val
idpos = self.errorpos
savepos = self.errorpos
self.NextToken()
# Course of action decided here.
@ -905,11 +906,11 @@ class parser(object):
# Functions are looked up in the global scope only.
sym = self.FindSymbolFull(val, 0)
if sym is None:
self.errorpos = idpos
self.errorpos = savepos
raise EParseUndefined(self)
if sym['Kind'] != 'f':
self.errorpos = idpos
self.errorpos = savepos
raise EParseUndefined(self)
args = self.Parse_optional_expression_list(sym['ParamTypes'])
self.expect(')')
@ -918,7 +919,7 @@ class parser(object):
sym = self.FindSymbolFull(val)
if sym is None or sym['Kind'] != 'v':
self.errorpos = idpos
self.errorpos = savepos
raise EParseUndefined(self)
typ = sym['Type']
@ -1612,16 +1613,20 @@ list lazy_list_set(list L, integer i, list v)
return {'nt':'STSW', 't':None, 'name':name, 'scope':0}
if tok0 == 'RETURN':
savepos = self.errorpos
self.NextToken()
if self.tok[0] == ';':
value = None
else:
savepos = self.errorpos
value = self.Parse_expression()
self.expect(';')
self.NextToken()
if ReturnType is None and value is not None:
self.errorpos = savepos
raise EParseReturnShouldBeEmpty(self)
if ReturnType is not None and value is None:
self.errorpos = savepos
raise EParseReturnIsEmpty(self)
if value is None:
return {'nt':'RETURN', 't':None}