Records

import ballerina/io;

// Defines a record type named `Coord`.
type Coord record {
    int x;
    int y;
};

public function main() {
    // Creates a `record`, specifying values for its fields.
    record { int x; int y; } r = {
        x: 1,
        y: 2
    };

    // Creates a `Coord` record.
    Coord c = {
        x: 1,
        y: 2
    };

    int a = r.y;
    io:println(a);

    int b = c.x;
    io:println(b);
}

Records

A record type has specific named fields. Fields can be accessed with r.x. Records are mutable: r.x is an lvalue. Records can be constructed using a similar syntax to a map. Typically a record type is combined with a type definition. The name of the type is not significant: a record is just a collection of fields. Record equality works same as map equality.

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Structural Typing

import ballerina/io;

type Coord record {
    int x;
    int y;
};

Defines a record type named Coord.

public function main() {

    record { int x; int y; } r = {
        x: 1,
        y: 2
    };

Creates a record, specifying values for its fields.

    Coord c = {
        x: 1,
        y: 2
    };

Creates a Coord record.

    int a = r.y;
    io:println(a);

    int b = c.x;
    io:println(b);
}

bal run records.bal
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Records

Records

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