Revision [11942]

This is an old revision of ProPgDataConversion made by ElSairon on 2007-12-21 14:21:56.


Coercion and Conversion

Coercion of Numeric Data Types in Expressions.

When two different data types are used in a binary operation, like + (Addition) or = (Assignment), the smaller data type is automatically promoted to the larger data type regardless of the order in which the arguments are given.

Promotions are as follows:
All unsigned integer types are handling like signed integer types for the purpose of promotion, and the most significant bit is extended (sign extension).

Conversion of Numeric Data Types

A type conversion will occur implicitly when an expression or variable is assigned, passed as a parameter to a procedure, or returned as a result from a procedure. Conversions may also be explicit when using CAST or one of the built-in conversion functions.

Integer To Integer, any combination of Signed and Unsigned
Integer to Single or Double
Double to Single
Double or Single to Integer
See also:
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