package lambdapi
Proof assistant for the λΠ-calculus modulo rewriting
Install
Dune Dependency
Authors
Maintainers
Sources
lambdapi-2.5.1.tbz
sha256=2c251021b6fac40c05282ca183902da5b1008e69d9179d7a9543905c2c21a28a
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doc/src/lambdapi.common/escape.ml.html
Source file escape.ml
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(** Escaped identifiers ["{|...|}"]. *) let escape : string -> string = fun s -> "{|" ^ s ^ "|}" (** [is_escaped s] tells if [s] begins with ["{|"] and ends with ["|}"] without overlapping. For efficiency, we just test that it starts with ['{']. *) let is_escaped : string -> bool = fun s -> s <> "" && s.[0] = '{' (** [unescape s] removes ["{|"] and ["|}"] if [s] is an escaped identifier. *) let unescape : string -> string = fun s -> if is_escaped s then String.(sub s 2 (length s - 4)) else s (** [p] is assumed to be a regular identifier. If [n] is a regular identifier too, then [add_prefix p n] is just [p ^ n]. Otherwise, it is ["{|" ^ p ^ unescape n ^ "|}"]. *) let add_prefix : string -> string -> string = fun p n -> if is_escaped n then escape (p ^ unescape n) else p ^ n (** [s] is assumed to be a regular identifier. If [n] is a regular identifier too, then [add_suffix n s] is just [n ^ s]. Otherwise, it is ["{" ^ unescape n ^ s ^ "|}"]. *) let add_suffix : string -> string -> string = fun n s -> if is_escaped n then escape (unescape n ^ s) else n ^ s
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