## ALP Programming Guide and Reference

[prev][next][parent][TOC]

### Description

The . (period) operator selects a structure or union field entry. It adds the left and right hand operands together and returns the result. The left operand should be an Indirect-ExpressionType, Indexed-ExpressionType, or Type-ExpressionType whose Type Declaration attribute resolves to that of a Structure-TypeName or Union-TypeName. The right operand should refer to a FieldName defined within the referenced type.

The Operand Size attribute of the result depends on the operands involved. If both operands have an operand size, a Structure-FieldName appearing as the right hand operand would override the operand size of the left operand and would dictate the operand size of the resulting expression.