//!element

@top Tree { element* }

element {
  Atom { Identifier lineEnd } |
  Section { Identifier lineEnd Block }
}

//!block

Block { indent element+ (dedent | eof) }

//!skip

@skip {
  spaces |
  Comment |
  blankLineStart (spaces | Comment)* lineEnd
}

//!lineEnd

lineEnd { newline | eof }

//!context

@context trackIndent from "./tokens.js"

//!externalTokens

@external tokens indentation from "./tokens.js" {
  indent
  dedent
  blankLineStart
}

//!tokens

@tokens {
  spaces { $[ \t]+ }
  newline { "\n" }
  eof { @eof }
  Comment { "#" ![\n]+ }
  Identifier { $[a-zA-Z0-9_]+ }
}