def _nt_character_class
start_index = index
if node_cache[:character_class].has_key?(index)
cached = node_cache[:character_class][index]
if cached
cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
@index = cached.interval.end
end
return cached
end
i0, s0 = index, []
if has_terminal?('[', false, index)
r1 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure('[')
r1 = nil
end
s0 << r1
if r1
s2, i2 = [], index
loop do
i3, s3 = index, []
i4 = index
if has_terminal?(']', false, index)
r5 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure(']')
r5 = nil
end
if r5
r4 = nil
else
@index = i4
r4 = instantiate_node(SyntaxNode,input, index...index)
end
s3 << r4
if r4
i6 = index
i7, s7 = index, []
if has_terminal?('\\', false, index)
r8 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure('\\')
r8 = nil
end
s7 << r8
if r8
if index < input_length
r9 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure("any character")
r9 = nil
end
s7 << r9
end
if s7.last
r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
r7.extend(CharacterClass0)
else
@index = i7
r7 = nil
end
if r7
r6 = r7
else
i10, s10 = index, []
i11 = index
if has_terminal?('\\', false, index)
r12 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure('\\')
r12 = nil
end
if r12
r11 = nil
else
@index = i11
r11 = instantiate_node(SyntaxNode,input, index...index)
end
s10 << r11
if r11
if index < input_length
r13 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure("any character")
r13 = nil
end
s10 << r13
end
if s10.last
r10 = instantiate_node(SyntaxNode,input, i10...index, s10)
r10.extend(CharacterClass1)
else
@index = i10
r10 = nil
end
if r10
r6 = r10
else
@index = i6
r6 = nil
end
end
s3 << r6
end
if s3.last
r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
r3.extend(CharacterClass2)
else
@index = i3
r3 = nil
end
if r3
s2 << r3
else
break
end
end
if s2.empty?
@index = i2
r2 = nil
else
r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
end
s0 << r2
if r2
if has_terminal?(']', false, index)
r14 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure(']')
r14 = nil
end
s0 << r14
end
end
if s0.last
r0 = instantiate_node(CharacterClass,input, i0...index, s0)
r0.extend(CharacterClass3)
r0.extend(CharacterClass4)
else
@index = i0
r0 = nil
end
node_cache[:character_class][start_index] = r0
r0
end