escape_map.push_back(P("(<?!\\\\\\\\textbackslash)\\{", "\\\\\\{"));
escape_map.push_back(P("(<?!\\\\\\\\textbackslash\\\\\\{)\\}", "\\\\\\}"));
escape_map.push_back(P("\\[", "\\{\\[\\}"));
escape_map.push_back(P("\\]", "\\{\\]\\}"));
escape_map.push_back(P("(<?!\\\\\\\\textbackslash)\\{", "\\\\\\{"));
escape_map.push_back(P("(<?!\\\\\\\\textbackslash\\\\\\{)\\}", "\\\\\\}"));
escape_map.push_back(P("\\[", "\\{\\[\\}"));
escape_map.push_back(P("\\]", "\\{\\]\\}"));