Function IsOptional

symbols/typeexprs.go:180–183

IsOptional returns true if an argument of fn:Struct is an optional field.

(structElem ast.BaseTerm)

// IsOptional returns true if an argument of fn:Struct is an optional field.
func IsOptional(structElem ast.BaseTerm) bool {
	opt, ok := structElem.(ast.ApplyFn)
	return ok && opt.Function.Symbol == Optional.Symbol
}

// StructTypeRequiredArgs returns type arguments of a StructType.
func StructTypeRequiredArgs(tpe ast.BaseTerm) ([]ast.BaseTerm, error) {