squark-macros 0.7.0

view = _{ SOI ~ tag ~ EOI }

identifier = _{ ('a'..'z' | 'A'..'Z' | '0'..'9' | "_" | "-")+ }

tag_name = @{ identifier }
tag = { single_tag | pair_tag }

pair_tag = _{ open_tag ~ children ~ close_tag }
single_tag = _{ "<" ~ tag_name ~ attributes ~ "/" ~ ">" }

children = {(tag | embedded_outer | text)*}

open_tag = _{ "<" ~ tag_name ~ attributes ~ ">" }
close_tag = _{ "<" ~ "/" ~ (!">" ~ ANY)+ ~ ">" }

attributes = { attribute* }
attribute = _{ key ~ "=" ~ (string_literal | bool | embedded_outer) }

key = @{ identifier }

string_literal = _{ "\"" ~ string ~ "\"" }
string = @{ (!"\"" ~ ANY)* }

embedded_outer = _{ "{" ~ embedded ~ "}" }
embedded = { (bracketed | (!"}" ~ ANY))* }
bracketed = _{ "{" ~ bracketed_inner ~ "}" }
bracketed_inner = _{ (bracketed | (!"}" ~ ANY))* }

bool = { "true" | "false" }

text = @{ (!("<" | "{") ~ ANY)+ }

newline    = _{ "\n" | "\r\n" }
WHITESPACE = _{ " " | newline }