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Move symbol existence check and creation to newId

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ENameAlreadyExists has also been expanded to accept an inliner object, even though it's not used yet. Plans are the same as in EParse.
This commit is contained in:
Sei Lisa 2019-01-06 01:33:49 +01:00
parent 41515f338a
commit 0ffe823c18
1 changed files with 19 additions and 18 deletions
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37
lslopt/lslinliner.py
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@ -26,7 +26,9 @@ SINGLE_OPT_EXPR_CHILD_NODES = frozenset({'DECL', 'EXPR', 'RETURN',
# TODO: We can do a bit better with evaluation order.
class ENameAlreadyExists(Exception): pass
class ENameAlreadyExists(Exception):
def __init__(self, obj, text):
super(ENameAlreadyExists, self).__init__(text)
class EExpansionLoop(Exception):
def __init__(self):
@ -34,10 +36,17 @@ class EExpansionLoop(Exception):
u" inline functions")
class inliner(object):
def newId(self, namespace):
"""Create a new identifier based on a namespace"""
def newId(self, namespace, scope, symdata):
"""Create a new identifier based on a namespace."""
self.symCtr[namespace] = self.symCtr.get(namespace, 0) + 1
return '___%s__%05d' % (namespace, self.symCtr[namespace])
name = '___%s__%05d' % (namespace, self.symCtr[namespace])
if name in self.symtab[scope]:
kinds = {'l':u"Label", 'f':u"Function", 'v':u"Variable",
's':u"State"}
raise ENameAlreadyExists(self, u"%s already exists: %s"
% (kinds[symdata['Kind']], name.decode('utf8')))
self.symtab[scope][name] = symdata
return name
def newSymtab(self):
self.symtab.append({})
@ -114,12 +123,9 @@ class inliner(object):
copy = node.copy()
oldscope = node.scope
oldname = node.name
copy.name = self.newId('lbl')
copy.name = self.newId('lbl', scope, {'Type':'l', 'Scope':scope,
'ref':0})
copy.scope = scope
if copy.name in self.symtab[scope]:
raise ENameAlreadyExists(
u"Label already exists: %s" % copy.name.decode('utf8'))
self.symtab[scope][copy.name] = {'Type':'l','Scope':scope,'ref':0}
self.symtab[oldscope][oldname]['NewSymbolName'] = copy.name
self.symtab[oldscope][oldname]['NewSymbolScope'] = scope
return copy
@ -170,13 +176,8 @@ class inliner(object):
retvar = None
if rettype is not None:
# Returns a value. Create a local variable at the starting level.
retvar = self.newId('ret')
if retvar in self.symtab[scope]:
raise ENameAlreadyExists(u"Symbol %s already exists"
% retvar.decode('utf8'))
# Add the symbol to the symbol table
self.symtab[scope][retvar] = {'Kind':'v', 'Scope':scope,
'Type':rettype}
retvar = self.newId('ret', scope, {'Kind':'v', 'Scope':scope,
'Type':rettype})
# Add the declaration to the list of statements
fns.append(nr(nt='DECL', t=rettype, name=retvar, scope=scope))
@ -206,9 +207,9 @@ class inliner(object):
self.retvar = retvar
self.retscope = scope
self.retlscope = scope
retlabel = self.newId('rtl')
retlabel = self.newId('rtl', scope, {'Type':'l', 'Scope':scope,
'ref':0})
self.retlabel = retlabel
self.symtab[scope][retlabel] = {'Type':'l', 'Scope':scope, 'ref':0}
# Get a copy of the function
blk = [self.GetFuncCopy(self.tree[fnsym['Loc']])]