Coral 66 Language Reference Manual

For mission-critical applications

Ministry of Defence

Copyright © 1970 Crown Copyright

Copyright © 1999, 2000 XGC Technology

Acknowledgments

The information in this reference manual is based on the text of the HMSO publication Official Definition of Coral 66, first published in 1970 and reprinted with amendments in 1974. ISBN 0 11 470221 7.

This document was prepared using DocBook XML from docbook.org.

Table of Contents

Related Documents
Reader's Comments
Preface to the 1974 Edition

1. Introduction

Special-Purpose Languages
Real Time
Syntax
Implementation

2. The Coral 66 Program

Objects
Program

Block Structure
Clashing of Names
Globals
Labels
Restrictions Connected with Scoping

4. Reference to Data

Numeric Types

Simple References

Array References

Packed Data

Table Declaration
Table-Element Declaration
Example of a Table Declaration
Reference to Tables and Table Elements

Storage Allocation

Presetting of Simple References and Arrays
Presetting of Tables

Preservation of Values

Overlay Declarations

5. Place References–Switches

6. Expressions

Simple Expressions

Primaries
Word-Logic
Evaluation of Expressions

Conditional Expressions

Conditions

7. Statements

Assignments

Goto Statements

Procedure Statements

Answer Statements

Code Statements

Compound Statements

Dummy Statements

Conditional Statements

For Statements

For-elements with STEP
For-elements with WHILE

8. Procedures

Answer Specification

Procedure Heading

Parameter Specification

Value Parameters
Data Reference Parameters
Place Parameters
Procedure Parameters
Non-Standard Parameter Specification

The Procedure Body

9. Communicators

COMMON Communicators
LIBRARY Communicators
EXTERNAL Communicators
ABSOLUTE Communicators

10. Names and Constants

Identifiers
Numbers
Literal Constants
Strings

11. Text Processing

Comment Sentences
Bracketed Comment
END Comment

Macro Facility

String Replacement
Parameters of Macros
Nesting of Macros
Deletion and Redefinition of Macros
Syntax of Comment and Macros

A. Syntax Summary

B. List of Language Symbols

C. Levels of Implementation

D. Implementation-Defined Characteristics

Language Profiles

Official Definition Profile
The XGC Profile
The Custom Profile

Implementation Details

E. Format of Code Statements

Format of Code Statements

Constraints for Operands

Simple Constraints
Multiple Alternative Constraints
Constraint Modifier Characters
M68000 Constraints

List of Tables
8-1. Parameters of Procedures
D-1. Encoded Type in a Formal Pair

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