1 (** Interface to Perl from OCaml.
3 * Copyright (C) 2003 Merjis Ltd.
5 * $Id: perl.mli,v 1.3 2003-10-12 11:56:26 rich Exp $
9 (** Perl interpreter (abstract type). *)
12 (** Perl scalar value. *)
14 exception Perl_failure of string
15 (** [die] in Perl code is translated automatically into this exception. *)
17 external create : ?args:string array -> unit -> t
19 (** Create a Perl interpreter.
21 * The optional [?args] parameter is the command line passed to the
22 * interpreter, and controls things like whether warnings are enabled
23 * ([-w]) and which file(s) are parsed. The first element in the
24 * array is the executable name (you can just set this to [""]).
26 * Perl won't allow you to create multiple interpreters at the same time
27 * unless Perl itself was compiled with [-Dusemultiplicity]. However you
28 * can create, then destroy, then create another and so on.
31 external destroy : t -> unit
33 (** Destroy a Perl interpreter, performing any necessary cleanup. *)
35 external set_context : t -> unit
36 = "perl4caml_set_context"
37 (** IF Perl was compiled with [-Dusemultiplicity] and IF you are using
38 * multiple interpreters at the same time, then you must call this to
39 * set the implied "current" interpreter.
41 * Most users will never need to call this function.
44 external int_of_sv : sv -> int = "perl4caml_int_of_sv"
45 (** Convert a Perl [SV] into an integer. Note that OCaml [int]s aren't
46 * large enough to store the full 32 (or 64) bits from a Perl integer,
47 * so you may get a silent overflow.
49 external sv_of_int : int -> sv = "perl4caml_sv_of_int"
50 (** Convert an [int] into a Perl [SV]. *)
51 external float_of_sv : sv -> int = "perl4caml_float_of_sv"
52 (** Convert a Perl [SV] into a float. *)
53 external sv_of_float : int -> sv = "perl4caml_sv_of_float"
54 (** Convert a [float] into a Perl [SV]. *)
55 external string_of_sv : sv -> string = "perl4caml_string_of_sv"
56 (** Convert a Perl [SV] into a string. *)
57 external sv_of_string : string -> sv = "perl4caml_sv_of_string"
58 (** Convert a [string] into a Perl [SV]. *)
59 external sv_is_true : sv -> bool = "perl4caml_sv_is_true"
60 (** Return [true] if the [SV] is "true" (in the Perl sense of truth). *)
61 external sv_is_undef : sv -> bool = "perl4caml_sv_is_undef"
62 (** Return [true] if the [SV] is undefined (is [undef]). *)
64 (** Returns [undef]. *)
66 (** Returns an [SV] which is true. *)
68 (** Returns an [SV] which is false. *)
70 external get_sv : ?create:bool -> string -> sv = "perl4caml_get_sv"
71 (** Return a scalar value by name. For example, if you have a symbol
72 * called [$a] in Perl, then [get_sv "a"] will return its value.
74 * If the symbol does not exist, this throws [Not_found].
76 * If the optional [?create] argument is set to true and the symbol does
77 * not exist, then Perl will create the symbol (with value [undef]) and
78 * this function will return the [SV] for [undef].
81 external call : ?sv:sv -> ?fn:string -> sv list -> sv
83 (** Call a Perl function in a scalar context, either by name (using the [?fn]
84 * parameter) or by calling a string/CODEREF (using the [?sv] parameter).
86 * Returns the Perl [SV] containing the result value. (See {!int_of_sv} etc.).
88 * If the Perl code calls [die] then this will throw [Perl_failure].
91 external call_array : ?sv:sv -> ?fn:string -> sv list -> sv list
92 = "perl4caml_call_array"
93 (** Call a Perl function in an array context, either by name (using the [?fn]
94 * parameter) or by calling a string/CODEREF (using the [?sv] parameter).
96 * Returns the list of results.
98 * If the Perl code calls [die] then this will throw [Perl_failure].
101 external call_void : ?sv:sv -> ?fn:string -> sv list -> unit
102 = "perl4caml_call_void"
103 (** Call a Perl function in a void context, either by name (using the [?fn]
104 * parameter) or by calling a string/CODEREF (using the [?sv] parameter).
106 * Any results are discarded.
108 * If the Perl code calls [die] then this will throw [Perl_failure].
111 external eval : string -> sv
113 (** This is exactly like the Perl [eval] command. It evaluates a piece of
114 * Perl code (in scalar context) and returns the result (a Perl [SV]).
117 external call_method : sv -> string -> sv list -> sv
118 = "perl4caml_call_method"
119 (** [call_method obj name [parameters]] calls the method [name] on the Perl
120 * object [obj] with the given parameters, in a scalar context. Thus this
121 * is equivalent to [$obj->name (parameters)].
123 * Returns the Perl [SV] containing the result value.
125 * If the method calls [die] then this will throw [Perl_failure].
128 external call_method_array : sv -> string -> sv list -> sv list
129 = "perl4caml_call_method_array"
130 (** Like [call_method], but the method is called in an array context. *)
132 external call_method_void : sv -> string -> sv list -> unit
133 = "perl4caml_call_method_void"
134 (** Like [call_method], but the method is called in a void context (results
137 external call_class_method : string -> string -> sv list -> sv
138 = "perl4caml_call_class_method"
139 (** [call_class_method classname name [parameters]] calls the static method
140 * [name] in the Perl class [classname] with the given parameters, in a
141 * scalar context. Thus this is equivalent to [$classname->name (parameters)].
143 * Returns the Perl [SV] containing the result value.
145 * If the static method calls [die] then this will throw [Perl_failure].
148 external call_class_method_array : string -> string -> sv list -> sv list
149 = "perl4caml_call_class_method_array"
150 (** Like [call_class_method], but the method is called in an array context. *)
152 external call_class_method_void : string -> string -> sv list -> unit
153 = "perl4caml_call_class_method_void"
154 (** Like [call_class_method], but the method is called in a void context. *)