def _nt_encoding
start_index = index
if node_cache[:encoding].has_key?(index)
cached = node_cache[:encoding][index]
if cached
cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
@index = cached.interval.end
end
return cached
end
i0 = index
if has_terminal?("7bits", false, index)
r1 = instantiate_node(SyntaxNode,input, index...(index + 5))
@index += 5
else
terminal_parse_failure("7bits")
r1 = nil
end
if r1
r0 = r1
else
if has_terminal?("8bits", false, index)
r2 = instantiate_node(SyntaxNode,input, index...(index + 5))
@index += 5
else
terminal_parse_failure("8bits")
r2 = nil
end
if r2
r0 = r2
else
if has_terminal?("7bit", false, index)
r3 = instantiate_node(SyntaxNode,input, index...(index + 4))
@index += 4
else
terminal_parse_failure("7bit")
r3 = nil
end
if r3
r0 = r3
else
if has_terminal?("8bit", false, index)
r4 = instantiate_node(SyntaxNode,input, index...(index + 4))
@index += 4
else
terminal_parse_failure("8bit")
r4 = nil
end
if r4
r0 = r4
else
if has_terminal?("binary", false, index)
r5 = instantiate_node(SyntaxNode,input, index...(index + 6))
@index += 6
else
terminal_parse_failure("binary")
r5 = nil
end
if r5
r0 = r5
else
if has_terminal?("quoted-printable", false, index)
r6 = instantiate_node(SyntaxNode,input, index...(index + 16))
@index += 16
else
terminal_parse_failure("quoted-printable")
r6 = nil
end
if r6
r0 = r6
else
if has_terminal?("base64", false, index)
r7 = instantiate_node(SyntaxNode,input, index...(index + 6))
@index += 6
else
terminal_parse_failure("base64")
r7 = nil
end
if r7
r0 = r7
else
r8 = _nt_ietf_token
if r8
r0 = r8
else
r9 = _nt_custom_x_token
if r9
r0 = r9
else
@index = i0
r0 = nil
end
end
end
end
end
end
end
end
end
node_cache[:encoding][start_index] = r0
r0
end