lua-isa

type check utility module.

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Installation

luarocks install isa

Functions

the following functions can also be called by the following lower-case aliases;

• isa.Nil: isa.nil
• isa.Boolean: isa.boolean
• isa.String: isa.string
• isa.Number: isa.number
• isa.Function: isa.function
• isa.Func: isa.func
• isa.Table: isa.table
• isa.Thread: isa.thread
• isa.Userdata: isa.userdata
• isa.File: isa.file
• isa.Callable: isa.callable
• isa.True: isa.true
• isa.False: isa.false
• isa.None: isa.none
• isa.NaN: isa.nan
• isa.Finite: isa.finite
• isa.Int: isa.int
• isa.Int8: isa.int8
• isa.Int16: isa.int16
• isa.Int32: isa.int32
• isa.Unsigned: isa.unsigned
• isa.UInt: isa.uint
• isa.UInt8: isa.uint8
• isa.UInt16: isa.uint16
• isa.UInt32: isa.uint32

ok = isa.Nil( val )

the function determines whether a value is nil or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is nil; otherwise, false.

ok = isa.Boolean( val )

the function determines whether a value is boolean or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is boolean; otherwise, false.

ok = isa.String( val )

the function determines whether a value is string or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is string; otherwise, false.

ok = isa.Number( val )

the function determines whether a value is number or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is number; otherwise, false.

ok = isa.Function( val )

the function determines whether a value is function or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is function; otherwise, false.

ok = isa.Table( val )

the function determines whether a value is table or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is table; otherwise, false.

ok = isa.Thread( val )

the function determines whether a value is thread or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is thread; otherwise, false.

ok = isa.Userdata( val )

the function determines whether a value is userdata or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is userdata; otherwise, false.

ok = isa.File( val )

the function determines whether a value is file or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is file; otherwise, false.

ok = isa.Callable( val )

the function determines whether a value is function or has a __call metamethod.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is function or has a __call metamethod; otherwise, false.

ok = isa.True( val )

the function determines whether a value is true or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is true; otherwise, false.

ok = isa.False( val )

the function determines whether a value is false or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is false; otherwise, false.

ok = isa.None( val )

the function determines whether a value is none or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is nil, false, 0, ''(empty-string) or nan; otherwise, false.

ok = isa.NaN( val )

the function determines whether a value is nan or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is nan; otherwise, false.

ok = isa.Finite( val )

the function determines whether a value is finite or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is finite; otherwise, false.

ok = isa.Int( val )

the function determines whether a value is int or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is int; otherwise, false.

ok = isa.Int8( val )

the function determines whether a value is int8 or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is int8; otherwise, false.

ok = isa.Int16( val )

the function determines whether a value is int16 or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is int16; otherwise, false.

ok = isa.Int32( val )

the function determines whether a value is int32 or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is int32; otherwise, false.

ok = isa.Unsigned( val )

the function determines whether a value is unsigned or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is unsigned; otherwise, false.

ok = isa.UInt( val )

the function determines whether a value is uint or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is uint; otherwise, false.

ok = isa.UInt8( val )

the function determines whether a value is uint8 or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is uint8; otherwise, false.

ok = isa.UInt16( val )

the function determines whether a value is uint16 or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is uint16; otherwise, false.

ok = isa.UInt32( val )

the function determines whether a value is uint32 or not.

Parameters

• val:any: value to be tested.

Returns

• ok:boolean: true if the given value is uint32; otherwise, false.