def _eval( self, cPPAST ):
if self.logger:
for symbol, replacement in self.symbols.items():
if isinstance(replacement, list):
replacementList = '[%s]' % (', '.join([str(x) for x in replacement]))
else:
replacementList = str(replacement)
if not cPPAST:
return []
if isinstance(cPPAST, Token):
try:
actionFunction = self.tokenActions[cPPAST.id]
except KeyError:
raise Exception('Bad AST Node')
return actionFunction(cPPAST)
elif isinstance(cPPAST, list):
rtokens = TokenList()
if cPPAST and len(cPPAST):
for node in cPPAST:
result = self._eval(node)
if isinstance(result, list):
rtokens.extend(result)
elif result:
rtokens.append(result)
return rtokens
elif isinstance(cPPAST, ppAst):
try:
actionFunction = self.astActions[cPPAST.name]
except KeyError:
raise Exception('Bad AST Node')
return actionFunction(cPPAST)
else:
raise Exception('Bad AST Node')
def eval_IfSection(self, cPPAST):
rtokens = TokenList()
self.line += 1
value = self._eval(cPPAST.getAttr('if'))
if value:
rtokens.extend( value )
for elseif in cPPAST.getAttr('elif'):
self.line += 1
if not value:
value = self._eval(elseif)
if value:
rtokens.extend( value )
else:
self._eval(elseif) # Silent eval to count line numbers properly
if cPPAST.getAttr('else'):
elseEval = self._eval(cPPAST.getAttr('else'))
self.line += 1
if not value:
value = elseEval
rtokens.extend( value )
self.line += 1
return rtokens