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/* Copyright (C) 2003-2015 LiveCode Ltd.
This file is part of LiveCode.
LiveCode is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License v3 as published by the Free
Software Foundation.
LiveCode is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LiveCode. If not see <http://www.gnu.org/licenses/>. */
/**
This library consists of the general operations on types provided by the standard library of LiveCode Builder.
*/
module com.livecode.type
use com.livecode.foreign
public foreign handler MCTypeEvalIsEmpty(in Target as any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCTypeEvalIsNotEmpty(in Target as any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCTypeEvalIsDefined(in Target as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCTypeEvalIsNotDefined(in Target as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCTypeEvalIsABoolean(in Target as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCTypeEvalIsANumber(in Target as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCTypeEvalIsAString(in Target as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCTypeEvalIsAData(in Target as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCTypeEvalIsAnArray(in Target as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCTypeEvalIsAList(in Target as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCNothingEvalIsEqualToNothing(in Left as optional any, in Right as nothing, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCNothingEvalIsNothingEqualTo(in Left as nothing, in Right as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCNothingEvalIsNotEqualToNothing(in Left as optional any, in Right as nothing, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCNothingEvalIsNothingNotEqualTo(in Left as nothing, in Right as optional any, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCNothingEvalIsNothingEqualToNothing(in Left as nothing, in Right as nothing, out Value as CBool) returns nothing binds to "<builtin>"
public foreign handler MCNothingEvalIsNothingNotEqualToNothing(in Left as nothing, in Right as nothing, out Value as CBool) returns nothing binds to "<builtin>"
/**
Summary: Determines whether <Target> is empty or not.
Target: Any expression
output: Returns true if the given expression <Target> evaluates to the empty value of that type, and false otherwise.
*/
syntax IsEmpty is postfix operator with comparison precedence
<Target: Expression> "is" "empty"
begin
MCTypeEvalIsEmpty(Target, output)
end syntax
/**
Summary: Determines whether <Target> is empty or not.
Target: Any expression
output: Returns false if the given expression <Target> evaluates to the empty value of that type, and true otherwise.
*/
syntax IsNotEmpty is postfix operator with comparison precedence
<Target: Expression> "is not" "empty"
begin
MCTypeEvalIsNotEmpty(Target, output)
end syntax
--
/**
Name: IsNothing
Type: operator
Syntax: <Target> is nothing
Summary: Determines whether <Target> is nothing or not.
Target: Any expression
output: Returns true if the given expression <Target> is nothing, and false otherwise.
Description:
Use the <IsNothing> operator to test if operators or handlers have returned anything.
*/
syntax NothingIsNothing is neutral binary operator with comparison precedence
<Left: Expression> "is" <Right: Expression>
begin
MCNothingEvalIsEqualToNothing(Left, Right, output)
MCNothingEvalIsNothingEqualTo(Left, Right, output)
MCNothingEvalIsNothingEqualToNothing(Left, Right, output)
end syntax
/**
Name: IsNotNothing
Type: operator
Syntax: <Target> is not nothing
Summary: Determines whether <Target> is nothing or not.
Target: Any expression
output: Returns false if the given expression <Target> is nothing, and true otherwise.
Example:
public handler CanBeNumber(in pString as String) returns Boolean
variable tNum as optional Number
put pString parsed as number into tNum
return tNum is not nothing
end handler
Description:
Use the <IsNotNothing> operator to test if operators or handlers have returned anything.
*/
syntax NothingIsNotNothing is neutral binary operator with comparison precedence
<Left: Expression> "is not" <Right: Expression>
begin
MCNothingEvalIsNotEqualToNothing(Left, Right, output)
MCNothingEvalIsNothingNotEqualTo(Left, Right, output)
MCNothingEvalIsNothingNotEqualToNothing(Left, Right, output)
end syntax
--
/**
Summary: Determines whether <Target> is a boolean or not.
Target: Any expression
output: Returns true if the given expression <Target> is a boolean, and false if not.
*/
syntax IsABoolean is postfix operator with classification precedence
<Target: Expression> "is" "a" "boolean"
begin
MCTypeEvalIsABoolean(Target, output)
end syntax
/**
Summary: Determines whether <Target> is a number or not.
Target: Any expression
output: Returns true if the given expression <Target> is a number, and false if not.
*/
syntax IsANumber is postfix operator with classification precedence
<Target: Expression> "is" "a" "number"
begin
MCTypeEvalIsANumber(Target, output)
end syntax
/**
Summary: Determines whether <Target> is a string or not.
Target: Any expression
output: Returns true if the given expression <Target> is a string, and false if not.
*/
syntax IsAString is postfix operator with classification precedence
<Target: Expression> "is" "a" "string"
begin
MCTypeEvalIsAString(Target, output)
end syntax
/**
Summary: Determines whether <Target> is data or not.
Target: Any expression
output: Returns true if the given expression <Target> is data, and false if not.
*/
syntax IsAData is postfix operator with classification precedence
<Target: Expression> "is" "a" "data"
begin
MCTypeEvalIsAData(Target, output)
end syntax
/**
Summary: Determines whether <Target> is an array or not.
Target: Any expression
output: Returns true if the given expression <Target> is an array, and false if not.
*/
syntax IsAnArray is postfix operator with classification precedence
<Target: Expression> "is" "an" "array"
begin
MCTypeEvalIsAnArray(Target, output)
end syntax
/**
Summary: Determines whether <Target> is a list or not.
Target: Any expression
output: Returns true if the given expression <Target> is a list, and false if not.
*/
syntax IsAList is postfix operator with classification precedence
<Target: Expression> "is" "a" "list"
begin
MCTypeEvalIsAList(Target, output)
end syntax
--
end module