def _nt_parsing_rule
start_index = index
if node_cache[:parsing_rule].has_key?(index)
cached = node_cache[:parsing_rule][index]
@index = cached.interval.end if cached
return cached
end
i0, s0 = index, []
if input.index('rule', index) == index
r1 = instantiate_node(SyntaxNode,input, index...(index + 4))
@index += 4
else
terminal_parse_failure('rule')
r1 = nil
end
s0 << r1
if r1
r2 = _nt_space
s0 << r2
if r2
r3 = _nt_nonterminal
s0 << r3
if r3
r4 = _nt_space
s0 << r4
if r4
i6, s6 = index, []
if input.index('do', index) == index
r7 = instantiate_node(SyntaxNode,input, index...(index + 2))
@index += 2
else
terminal_parse_failure('do')
r7 = nil
end
s6 << r7
if r7
r8 = _nt_space
s6 << r8
end
if s6.last
r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
r6.extend(ParsingRule0)
else
self.index = i6
r6 = nil
end
if r6
r5 = r6
else
r5 = instantiate_node(SyntaxNode,input, index...index)
end
s0 << r5
if r5
r9 = _nt_parsing_expression
s0 << r9
if r9
r10 = _nt_space
s0 << r10
if r10
if input.index('end', index) == index
r11 = instantiate_node(SyntaxNode,input, index...(index + 3))
@index += 3
else
terminal_parse_failure('end')
r11 = nil
end
s0 << r11
end
end
end
end
end
end
end
if s0.last
r0 = instantiate_node(ParsingRule,input, i0...index, s0)
r0.extend(ParsingRule1)
else
self.index = i0
r0 = nil
end
node_cache[:parsing_rule][start_index] = r0
return r0
end