pTAL Conversion Guide

Contents

pTAL Conversion Guide—527302-002

vii

15. Statements (continued)

RETURN Statement 15-19

Returning a Value and Condition Code in TAL 15-20

Returning a Condition Code in pTAL 15-20

SCAN and RSCAN Statements 15-23

Extended Pointers 15-24

Scanning Across Variable Boundaries 15-24

Scanning Data in P-Relative Arrays 15-25

USE Statement 15-26

TAL 15-26

pTAL 15-26

WHILE Statement 15-27

16. Procedures, Subprocedures, and Procedure Pointers

Procedure Syntax 16-1

Variable and Extensible Procedures 16-5

TAL 16-5

pTAL 16-6

Procedure Pointers 16-6

Declaring PROCPTR Variables 16-10

Declaring PROCPTRs in Structures 16-11

Procedures as Formal Parameters 16-13

Assigning Values to PROCPTR Variables 16-14

Using PROCs as Formal Parameters 16-16

TAL 16-16

pTAL 16-16

Procedure Parameters 16-17

Dynamically Selected Procedure Calls 16-17

Parameters and VARIABLE and EXTENSIBLE Procedures 16-19

VARIABLE, EXTENSIBLE, and RETURNSCC Procedures as Actual

Parameters 16-19

Using Formal STRING Value Parameters 16-20

Passing a .EXT Parameter to a Non-EXT Reference Parameter 16-21

Declaring STRUCTs as Formal Parameters 16-21

Referencing Parameters 16-23