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@@ -156,7 +156,13 @@ class Python27Parser(Python2Parser):
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while1stmt ::= SETUP_LOOP returns bp_come_from
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while1stmt ::= SETUP_LOOP l_stmts_opt JUMP_BACK POP_BLOCK COME_FROM
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whilestmt ::= SETUP_LOOP testexpr l_stmts_opt JUMP_BACK POP_BLOCK _come_froms
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# Should this be JUMP_BACK+ ?
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# JUMP_BACK should all be to the same location
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whilestmt ::= SETUP_LOOP testexpr l_stmts_opt JUMP_BACK JUMP_BACK POP_BLOCK _come_froms
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while1elsestmt ::= SETUP_LOOP l_stmts JUMP_BACK POP_BLOCK
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else_suitel COME_FROM
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whileelsestmt ::= SETUP_LOOP testexpr l_stmts_opt JUMP_BACK POP_BLOCK
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@@ -211,14 +217,17 @@ class Python27Parser(Python2Parser):
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self.check_reduce['list_if_not'] = 'AST'
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self.check_reduce['list_if'] = 'AST'
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self.check_reduce['conditional_true'] = 'AST'
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self.check_reduce['whilestmt'] = 'tokens'
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return
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def reduce_is_invalid(self, rule, ast, tokens, first, last):
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invalid = super(Python27Parser,
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self).reduce_is_invalid(rule, ast,
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tokens, first, last)
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if invalid:
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return invalid
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if rule == ('and', ('expr', 'jmp_false', 'expr', '\\e_come_from_opt')):
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# Test that jmp_false jumps to the end of "and"
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# or that it jumps to the same place as the end of "and"
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@@ -249,6 +258,16 @@ class Python27Parser(Python2Parser):
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jmp_target = jmp_true.offset + jmp_true.attr + 3
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return not (jmp_target == tokens[last].offset or
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tokens[last].pattr == jmp_true.pattr)
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elif (rule[0] == 'whilestmt' and
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rule[1][0:-2] ==
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('SETUP_LOOP', 'testexpr', 'l_stmts_opt',
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'JUMP_BACK', 'JUMP_BACK')):
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# Make sure that the jump backs all go to the same place
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i = last-1
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while (tokens[i] != 'JUMP_BACK'):
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i -= 1
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return tokens[i].attr != tokens[i-1].attr
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# elif rule[0] == ('conditional_true'):
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# # FIXME: the below is a hack: we check expr for
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# # nodes that could have possibly been a been a Boolean.
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