Type Conversion and Assignment

Assignment Model

The way iXML assigns values depends on the type:

Primitive variables (null, bool, int, float, string) are assigned by value. Copies are created.
Complex variables (array, function, macro, class) are assigned by reference. Both variables point to the same data.

The following table shows how values behave across type inspection, comparison, and casting.

Value	`TYPEOF`	`IF=''`	`IF!=''`	`IF='0'`	`CAST(bool)`	`CAST(int)`	`CAST(float)`	`CAST(string)`
`<undefined>`	`'undefined'`	true	false	false	`false`	`0`	`0`	`''`
`NULL`	`'null'`	true	false	false	`false`	`0`	`0`	`''`
`TRUE`	`'bool'`	false	true	false	`true`	`1`	`1`	`'1'`
`FALSE`	`'bool'`	true	false	false	`false`	`0`	`0`	`''`
`0`	`'int'`	false	true	true	`false`	`0`	`0`	`'0'`
`123`	`'int'`	false	true	false	`true`	`123`	`123`	`'123'`
`0.0`	`'float'`	false	true	true	`false`	`0`	`0`	`'0'`
`'0'`	`'string'`	false	true	true	`false`	`0`	`0`	`'0'`
`'abc'`	`'string'`	false	true	false	`true`	`0`	`0`	`'abc'`
`''`	`'string'`	true	false	false	`false`	`0`	`0`	`''`
`<array>`	`'array'`	false	true	false	`true`	`0`	`0`	`'[array#N]'`

warning

Numeric Comparison Trap: <if value1="0" func="=" value2="0.0"> is true because numeric comparison is performed when both sides look numeric.