Function invocation

• Do not keep spaces between the function name and opening parentheses (.

• If it is not possible to keep the function invocation in a single line due to it exceeding the maximum line length, split it into a new line based on the best practices given in Line breaks.

Example,

setAgeForEmployee(employeeName,
    employeeID);

Record literal

• If empty, keep it as an empty block.

Example,

Person p = {};

• In a record literal, arrange the fields in a single line. Then, add a space after the comma and leave no spaces between the braces and fields.

Example,

Person p = {name: "john", age: 20};

• Do not keep any spaces between the key and the colon. Also, keep only one space between the colon and the value.

Example,

Person person = {
    name: "john" // in this field key is the "name" and value is "john".
};

• You can define the fields in new lines. If you do so, make sure each field is in a separate line and is block-indented.

Do's

Person p = {
    name: "john",
    age: 20
};

Don'ts

Person p = {name: "john",
    age: 20};
  
//Or
  
Person p = {
name: "john",
age: 20
};
  
//Or
  
Person p = {
    name: "john",
    age: 20};

Map literal

• For map literals, follow the same formatting guidelines as Record literals.

Example,

// Inline map literal.
map<string> mapOfString1 = {name: "john", id: "0"};
  
// Mulitline map literal.
map<string> mapOfString2 = {
    name: "john",
    id: "0"
};

Tuple

• Always, place a tuple in a single line.

Example,

[string, int] tuple = ["john", 20];

• If a tuple exceeds the maximum line length limit, move the whole tuple to a new line and indent with four spaces from the starting position of the statement or definition.

Example,

[string, int] tuple = 
    [nameOfEmployee, ageOfTheEmployee];

Array literal

• Place simple arrays in a single line.
• Do not keep any spaces between the opening bracket, value, and the closing bracket.

Example,

string[] names = ["john", "doe", "jane", "doe"];

• If an array cannot be placed on a single line due to it exceeding the maximum line length, split each value in the array to its own block-indented line.

Example,

string[] names = [
    "john",
    "doe",
    "jane",
    "doe"
];

Type casting

• Do not keep spaces between the type and the angle brackets (i.e.,

  <string>

  ).
• Do not keep spaces between the closing angle bracket and value reference, which will be casted.

Example,

string name = <string>person.name;

• Avoid line breaks in type casting.

Do's

<string>

Don'ts

<
    string
>

Table literal

• Follow the formatting guidelines of Record literals when formatting a table block.

Example,

type Employee record {
    readonly int id;
    string name;
    float salary;
};

type EmployeeTable table<Employee> key(id);

public function main() {

    EmployeeTable employeeTab = table [
        {id: 1, name: "John", salary: 300.50},
        {id: 2, name: "Bella", salary: 500.50},
        {id: 3, name: "Peter", salary: 750.0}
    ];
}