convertToInteger() Operation for Strings

Syntax	NONE `set anInteger = aString.convertToInteger() set anInteger = convertToInteger(LITERAL)`
Semantics	Converts the lexical representation of an integer (e.g. 12345) to an Integer type. The format used is: `[+\|-][nnnnn]` nnnnn may be any number of decimal digits (0-9). Empty string is converted to 0. If the conversion is not possible, an error message is raised (for instance: `NULL` strings).
Substitutables	`aString`	Can be any variable or object attribute having the type String.
Substitutables	`LITERAL`	String literal.
Examples	NONE `set anInteger = aString.convertToInteger();` For a UML example, refer to Type Converter Operations.