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asn1rt: add a step and exception in table lookup

This commit is contained in:
mitshell 2017-08-27 23:18:10 +02:00
parent c392a298e0
commit 6ba99161e8
1 changed files with 8 additions and 1 deletions
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9
pycrate_asn1rt/asnobj.py
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@ -361,10 +361,17 @@ class ASN1Obj(Element):
raise(ASN1ObjErr('{0}: invalid table constraint @ path, {1!r}'\
.format(self.fullname(), self._const_tab_at)))
try:
return self._const_tab(IndIdent, IndVal)[self._const_tab_id]
claval = self._const_tab(IndIdent, IndVal)
except:
raise(ASN1ObjErr('{0}: unable to select table constraint {1} with value {2!r}'\
.format(self.fullname(), IndIdent, IndVal)))
else:
try:
return claval[self._const_tab_id]
except:
raise(ASN1ObjErr('{0}: unable to select ident {1} within table value'\
.format(self.fullname(), self._const_tab_id)))
#--------------------------------------------------------------------------#
# user-friendly generic representation