The Smudge Programming Language - box std.cast

The box std.cast is an utility to convert into and check object types.

Function int (x)

Casts the object x to an integer. It does work only if x is an integer, float or a string. Returns the integer, or null if x is of an incompatible type.

Function float (x)

Casts the object x to a float. It does work only if x is an integer, float or a string. Returns the float, or null if x is of an incompatible type.

Function string (obj)

Converts object obj to a string. If obj is an instance, it has to have a method named to_string(). Returns the string.

Function is_int (x)

Returns true if x is an integer, false otherwise.

Function is_float (x)

Returns true if x is a float, false otherwise.

Function is_string (x)

Returns true if x is a string, false otherwise.

Function uchar (cp)

Returns a string containing the character represented by the Unicode codepoint cp, or null if cp is not a valid codepoint.

Function ucode (str)

Returns the Unicode codepoint of the first character in the string str, or null if str is not a valid string.

Function value (x)

Returns x. If x is a reference, returns the object pointed by x.

Function typeof (obj)

Returns a string representing the type of the object obj following the rules:

Function classof (obj)

Returns the class of the object obj, or null if obj is neither a class instance nor a string.

Function baseof (c[, n = 0])

Returns the nth super class of the class c, or null if c is not a class or has not that super class.

Function same (a, b)

Returns true if a and b are the same object, false otherwise.

Function kin (c1, c2)

Returns true if class c2 is derived from or the same as class c1. c1 and c2 can be also class instances, in that case their base classes will be used instead (see classof()).

Function desc (obj)

Returns a string containing a description of obj (such as <null> for null, <integer> for integer, etc.). The description given are equal to them printed by Smudge error messages.