Keywords and Types

• Do not keep spaces between the type and the pipe operator when it is in a union type (e.g., string|int).

  Example,

  type method "POST"|"GET"|"PUT";
      
  int|string variable = 0;
  
  function getValue(string key) returns string|error {
      ...
  }
  
  function getName() returns string|error {
      string|error valueOrError = getValue("name");
      ...
  }

• Do not keep spaces between the type and the optional operator ?.

  Example,

  string? name;

• Avoid line breaks inside constrained types.

  Do's

  map<int|string> x; // map reference type

  Don'ts

  map<
      int
      |
      string
  > x;

Operators

• Keep only a single space before and after the = operator.

  Example,

  int a = 0;

• Do not keep spaces around the semicolon ;.

• Do not keep spaces between the unary operator and the expression.

  Example,

  a = -a;

• Keep a single space before and after any binary or ternary operator.

  Example,

  var fullName = firstName + lastName;
  
  string? name = isNameAvailable() ? getName() : "Unknown";
  
  var elvisOperator = name ?: "Unknown";

• Keep a single space before and after a compound operator such as -= and +=.

  Example,

  name += lastName;