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Table of Contents
2. TMT Pascal Language Description
2.2. Pascal Language Structure
2.2.6. Types
2.2.6.13. Record Types
2.2.6.13. Record Types
Record types are structures that contain components of different types.
Each component of a record is called a field. Variant sections are parts
of records can have multiple definitions. Record type are defined as follows:
record
Fieldlist
end
where Fieldlist is defined as:
[[Fixedpart] | [Fixedpart;] [Variantpart]];
where Fixedpart is:
Field [; Field];
where Field is
identifier [,identifier] : Identifiertype;
Variantpart is defined as follows:
case [identifier:] Typename of
Variant
[;Variant];
where Variant is:
Caserange [,Caserange] : (Fieldlist);
where Caserange is:
expression [..expression];
With a proper understanding of TMT Pascal record types, very powerful types
can be defined. The following are examples of record types:
type
Coordinate = record
x, y: Integer;
end;
Values = record
case Way: Boolean of
True: (RValue : Extended);
False: (IValue : Longint);
end;
To reference a field of a record specify the record variable followed by
a period (.) followed by the field name. The following refers to the fields
of Coordinate declared above:
Coordinate.x
Coordinate.y
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