Conditionals

Evaluating Boolean Expressions

Boolean expressions come in many forms in Cocolang, such as

A comparison expression with valid comparison operators like <, >, ==, <= or >=. See Conditionals.DoIfLarge()
An inversion with the ! operator. See BoolClass.Underage()
A class that implements the __bool__ special method can be used directly or converted with Bool(x). See BoolClass.Overage()

If/Else Conditionals

Conditionals in Coco begin with the if statement which can be used for optional execution of a block if the condition is met. The conditional expression must evaluate to a boolean as specified above. Alternate paths to the condition matching can be specified with the else and else if keywords

Switch Conditionals

switch statements are not currently supported yet in cocolang v0.1.2

coco Conditionals

endpoint invokable DoIf(confirm Bool) -> (out String):
    if confirm:
        return (out: {res} <- do())

endpoint invokable DoIfLarge(number U64) -> (out String):
    if number > 5000:
        return (out: {res}<- do())
		else if number > 2500:
				 return (out: "almost")
		else:
			 	 return (out: "not done")
			
func do() -> (res String):
    yield res "done!"

coco BoolClass

class Person:
	field name String
	field age  U64

	method __bool__(self) -> (result Bool):
			yield result self.age > 18

endpoint local Overage(person Person) -> (ok Bool):
			yield ok Bool(person)

endpoint local Underage(person Person) -> (ok Bool):
			yield ok !person