TAL Reference Summary

Expressions

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Expressions The following syntax diagrams describe:

Arithmetic expressions

Conditional expressions

Assignment expressions

CASE expressions

IF expressions

Group comparison expressions

Bit extractions

Bit shifts

Arithmetic Expressions An arithmetic expression is a sequence of operands and arithmetic operators that

computes a single numeric value of a specific data type.

operand

arithmetic-operator

010

operand

Variable The identifier of a simple variable, array element, pointer,

structure data item, or equivalenced variable, with or

without @ or an index

Constant A character string or numeric constant

LITERAL The identifier of a named constant

Function invocation The invocation of a procedure that returns a value

(expression) Any expression, enclosed in parentheses

Code space item The identifier of a procedure, subprocedure, or label

prefixed with @ or a read-only array optionally prefixed

with @, with or without an index

arithmetic-operator

Signed arithmetic operator: +, –, *, /

Unsigned arithmetic operator: '+', '–', '*', '/', '\'

Logical operator: LOR, LAND, XOR