dtpr

Checks if an object is a non-empty list.

listp

Checks if an object is a list.

pairp

Checks if an object is a cons object, that is, a non-empty list.

arrayp

Checks if an object is an array.

defstructp

Checks if an object is an instance of a particular defstruct.

tablep

Checks if an object is an association table.

type, typep

Returns a symbol whose name denotes the type of a SKILL object. The functions type and typep are identical.

vectorp

Checks if an object is a vector. Behaves the same as arrayp.

integerp

Checks if an object is an integer. This function is the same as fixp.

otherp

Checks if an object is a user type object, such as an association table or a window.

symbolp

Checks if an object is a symbol.

symstrp

Checks if an object is either a symbol or a string.

outstringp

Checks whether the specified value is an outstring port.

pcreObjectp

Checks to see whether the given argument is a pcreObject or not.

stringp

Checks if an object is a string.

evenp

Checks if a number is an even integer.

oddp

Checks if an object is an odd integer.

floatp

Checks if an object is a floating-point number. Same as realp.

fixp

Checks if an object is an integer, that is, a fixed number.

minusp

Checks if a value is a negative number. Same as negativep.

plusp

Checks if the given object is equal to one.

onep

Checks if the given object is equal to one.

realp

Checks if a value is a real number. Same as floatp.

zerop

Checks if an object is equal to zero.

numberp

Checks if a data object is a number, that is, either an integer or floating-point number.

inportp

Checks if an object is an input port.

outportp

Checks if an object is an output port.

openportp

Checks if the given argument is a port object and it is open (for input or output), nil otherwise.

portp

Checks if an object is an input or output port.

bcdp

Checks if an object is a binary primitive function.

booleanp

Checks if an object is a boolean.

getFunType

Returns a symbol denoting the function type for a given function object.

isMacro

Checks if the given symbol denotes a macro.

isCallable

Checks if a function is defined or is autoloadable from a context.

boundp

Checks if the variable named by a symbol is bound, that is, has been assigned a value. The single argument form of boundp only works in SKILL mode.

fboundp

Checks if the given name has a function binding.

getFnWriteProtect

Checks if the given function is write-protected.

getVarWriteProtect

Checks if a variable is write-protected.

isVarImported

Checks if the specified variable was imported into SKILL++ or not.

fdoc

Returns the documentation string for the function bound to the symbol s_function. SKILL switch saveInlineDoc must be set to save and retrieve the doc string.

procedurep

Checks if an object is a procedure, or function, object.