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Function Info ¶

G-Golf Function Info low level API.
GIFunctionInfo — Struct representing a function.

Procedures ¶

gi-function-info-is-method?

g-function-info-get-flags

g-function-info-get-property

g-function-info-get-symbol

g-function-info-get-vfunc

g-function-info-invoke

Types and Values ¶

%g-function-info-flags

Struct Hierarchy ¶

GIBaseInfoInfo
  +— GICallableInfo
           +— GIFunctionInfo
           +— GISignalInfo
           +— GIVFuncInfo

Description ¶

GIFunctionInfo represents a function, method or constructor. To find out what kind of entity a GIFunctionInfo represents, call g-function-info-get-flags.

See also Callable Info for information on how to retreive arguments and other metadata.

Procedures ¶

Note: in this section, the info argument is [must be] a pointer to a GIFunctionInfo.

Procedure: gi-function-info-is-method? info [flags #f] ¶

Returns #t if info is a method, that is if is-method is a member of the info flags. Otherwise, it returns #f.

The optional flags argument, if passed, must be the list of the function info flags as returned by g-function-info-get-flags.

Procedure: g-function-info-get-flags info ¶

Returns a list of %g-function-info-flags.

Obtain the GIFunctionInfoFlags for info.

Procedure: g-function-info-get-property info ¶

Returns a pointer or #f.

Obtains the GIPropertyInfo associated with info. Only GIFunctionInfo with the flag is-getter or is-setter have a property set. For other cases, #f will be returned.

The GIPropertyInfo must be freed by calling g-base-info-unref when done.

Procedure: g-function-info-get-symbol info ¶

Returns a string.

Obtain the ‘symbol’ of the function³¹.

Procedure: g-function-info-get-vfunc info ¶

Returns a pointer or #f.

Obtains the GIVFuncInfo associated with info. Only GIFunctionInfo with the flag wraps-vfunc has its virtual function set. For other cases, #f will be returned.

The GIVFuncInfo must be freed by calling g-base-info-unref when done.

Procedure: g-function-info-invoke info in-args n-in out-args n-out r-val g-error ¶

Returns #t if the function has been invoked, #f if an error occured.

Invokes the function described in info with the given arguments. Note that inout parameters must appear in both argument lists. The arguments are:

info

a pointer to a GIFunctionInfo describing the function to invoke.

in-args

a pointer to an array of GIArguments, one for each in and inout parameter of info. If there are no in parameter, in-args must be the %null-pointer.

n-in

the length of the in-args array.

out-args

a pointer to an array of GIArguments, one for each out and inout parameter of info. If there are no out parameter, out-args must be the %null-pointer.

n-out

the length of the out-args array.

r-val

a pointer to a GIArguments, the return location for the return value of the function. If the function returns void, r-val must be the %null-pointer.

g-error

a pointer to a newly allocated (and ‘empty’) GError (the recommended way for procedure calls that need such a pointer is to ‘surround’ the call using with-gerror).

Types and Values ¶

Instance Variable of <gi-flags>: %g-function-info-flags ¶

An instance of <gi-flags>, who’s members are the scheme representation of the GIFunctionInfoFlags:

g-name: GIFunctionInfoFlags
name: gi-function-info-flags
enum-set:

is-method

Is a method.

is-constructor

Is a constructor.

is-getter

Is a getter of a GIPropertyInfo.

is-setter

Is a setter of a GIPropertyInfo.

wraps-vfunc

Represent a virtul function.

throws

The function may throw an error.