def _nt_node_class_expression
start_index = index
if node_cache[:node_class_expression].has_key?(index)
cached = node_cache[:node_class_expression][index]
if cached
cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
@index = cached.interval.end
end
return cached
end
i0 = index
i1, s1 = index, []
r2 = _nt_space
s1 << r2
if r2
if has_terminal?('<', false, index)
r3 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure('<')
r3 = nil
end
s1 << r3
if r3
s4, i4 = [], index
loop do
i5, s5 = index, []
i6 = index
if has_terminal?('>', false, index)
r7 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure('>')
r7 = nil
end
if r7
r6 = nil
else
@index = i6
r6 = instantiate_node(SyntaxNode,input, index...index)
end
s5 << r6
if r6
if index < input_length
r8 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure("any character")
r8 = nil
end
s5 << r8
end
if s5.last
r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
r5.extend(NodeClassExpression0)
else
@index = i5
r5 = nil
end
if r5
s4 << r5
else
break
end
end
if s4.empty?
@index = i4
r4 = nil
else
r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
end
s1 << r4
if r4
if has_terminal?('>', false, index)
r9 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure('>')
r9 = nil
end
s1 << r9
end
end
end
if s1.last
r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
r1.extend(NodeClassExpression1)
r1.extend(NodeClassExpression2)
else
@index = i1
r1 = nil
end
if r1
r0 = r1
else
if has_terminal?('', false, index)
r10 = instantiate_node(SyntaxNode,input, index...(index + 0))
r10.extend(NodeClassExpression3)
@index += 0
else
terminal_parse_failure('')
r10 = nil
end
if r10
r0 = r10
else
@index = i0
r0 = nil
end
end
node_cache[:node_class_expression][start_index] = r0
r0
end