WHITESPACE = _{ WHITE_SPACE }

ident = @{ ( "_" | "$" | XID_START ) ~ XID_CONTINUE* }
deep_wildcard = { "." ~ "**" }
wildcard = { "." ~ "*" }
key = @{ "." ~ ident }
int = { "-"? ~ NUMBER+ }
string = @{ "\"" ~ (!("\"") ~ ANY)* ~ "\""}

subscript = { "[" ~ ( string | int ) ~ "]" }
full_range = { "[" ~ "]" }
range = { "[" ~ int ~ ":" ~ int ~ "]" }
range_to = { "[" ~ ":" ~ int ~ "]" }
range_from = { "[" ~ int ~ ":]" }

segment = _{ deep_wildcard | wildcard | key | subscript | full_range | range | range_to | range_from }
identity = { "." }

selector = { (segment+ | identity) }
selectors = { SOI ~ selector ~ ("," ~ selector)* ~ ","? ~ EOI }