<EOL_COMMENT> ('// From https://doc.rust-lang.org/reference.html#string-literals')
WHITE_SPACE ('\n')
let ('let')
WHITE_SPACE (' ')
identifier ('a')
WHITE_SPACE (' ')
= ('=')
WHITE_SPACE (' ')
STRING_LITERAL ('"foobar"')
; (';')
WHITE_SPACE ('\n')
let ('let')
WHITE_SPACE (' ')
identifier ('b')
WHITE_SPACE (' ')
= ('=')
WHITE_SPACE (' ')
STRING_LITERAL ('"foo')
VALID_STRING_ESCAPE_TOKEN ('\\n         ')
STRING_LITERAL ('bar"')
; (';')
WHITE_SPACE ('\n\n')
identifier ('assert_eq')
! ('!')
( ('(')
identifier ('a')
, (',')
identifier ('b')
) (')')
; (';')
