Expression		string
	The expression to be evaluated.
Value		extended
	The resultant value of the expression.
IsBuiltIn		(FuncName: string): boolean
	Determines whether the argument is a recognised built-in function.
NamedValues		TNamedValues
	A structure for holding named values, often constants such as pi and e, but it can hold any values that you want.
OnGetValue		TGetValueEvent
	An event called to retrieve the value of a user-defined variable. For example, if the expression was 2 * A then this event would be called to retrieve the value of A (unless A was pre-defined in the list of NamedValues.
OnChange		TNotifyEvent
	Invoked when the expression is changed.

TNamedValues

This type allows the definitions of constants and frequently used variables.

Add		(name: string; value: extended)
	Adds a named value. Will first delete any existing value with the same name.
Delete		(name: string)
	Deletes a named value. Performs no action if the name is not present.
Clear		()
	Deletes all named values.
IndexOf		(name: string): integer
	Returns the index of a value from its name. Returns -1 if the value is not present.
Assign		(Source: TPersistent)
	Copies a second TNamedValues to the current one.
BeginUpdate		()
	Starts buffering changes. The OnChange event will not be called until EndUpdate has been called for each time BeginUpdate was called.
EndUpdate		()
	Finishes buffering changes. EndUpdate should be called once for each BeginUpdate.
IsValidName		(name: string): boolean
	Determines whether name is valid. Only alphanumeric and underscore characters are allowed in value names.
ValueByName		[name: string]: extended
	A value from its name.
ValueByIndex		[index: integer]: extended
	A value from its index.
Values		[index: integer]: TNamedValue
	The array of named values.
Count		integer
	The number of named values defined.
OnChange		TNotifyEvent
	Invoked when the value is changed.
CaseSensitive		boolean
	Whether named values should be case-sensitive or not, e.g. whether variables PI and pi should be considered different or the same.

Types

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