char_feature.test

#\a                     ; lowercase letter
#\A                     ; uppercase letter
#\(                     ; left parenthesis
#\space                 ; the space character
#\newline               ; the newline character

#\c-a                   ; Control-a
#\meta-b                ; Meta-b
#\c-s-m-h-a             ; Control-Meta-Super-Hyper-A

#\; #\' #\"

#\u0041
#\x10FFFF
#\λ
#\)
#\💩

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[
	["char", "#\\a"], ["comment", "; lowercase letter"],
	["char", "#\\A"], ["comment", "; uppercase letter"],
	["char", "#\\("], ["comment", "; left parenthesis"],
	["char", "#\\space"], ["comment", "; the space character"],
	["char", "#\\newline"], ["comment", "; the newline character"],

	["char", "#\\c-a"], ["comment", "; Control-a"],
	["char", "#\\meta-b"], ["comment", "; Meta-b"],
	["char", "#\\c-s-m-h-a"], ["comment", "; Control-Meta-Super-Hyper-A"],

	["char", "#\\;"], ["char", "#\\'"], ["char", "#\\\""],

	["char", "#\\u0041"],
	["char", "#\\x10FFFF"],
	["char", "#\\λ"],
	["char", "#\\)"],
	["char", "#\\💩"]
]

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Checks for character literals.