main.ox

# Null Coalescing Operator Example in Oxide
# The ?? operator provides default values for null/empty values

print "=== Null Coalescing Operator (??) ==="
print ""

# Basic usage with empty strings
name = ""
displayName = name ?? "Anonymous"
print "Empty name ?? 'Anonymous' = " + displayName

# With actual value
actualName = "John"
result = actualName ?? "Anonymous"
print "'John' ?? 'Anonymous' = " + result

# Chaining null coalescing
print ""
print "=== Chaining ?? Operators ==="
first = ""
second = ""
third = "Fallback"
final = first ?? second ?? third
print "'' ?? '' ?? 'Fallback' = " + final

# Practical example: User configuration
print ""
print "=== Practical: User Configuration ==="

# Simulating optional configuration values
userTheme = ""
systemTheme = ""
defaultTheme = "light"

theme = userTheme ?? systemTheme ?? defaultTheme
print "Selected theme: " + theme

# With user preference set
userTheme = "dark"
theme = userTheme ?? systemTheme ?? defaultTheme
print "With user preference: " + theme

# Working with function returns
print ""
print "=== With Function Returns ==="

func getUsername()
    return ""
endfunc

func getGuestName()
    return "Guest_123"
endfunc

username = getUsername() ?? getGuestName()
print "Username: " + username

# Using with dictionaries
print ""
print "=== With Dictionary Values ==="
config = {"host": "localhost", "port": "", "debug": "true"}

host = config["host"] ?? "127.0.0.1"
port = config["port"] ?? "8080"
timeout = config["timeout"] ?? "30"

print "Host: " + host
print "Port: " + port
print "Timeout: " + timeout + "s"

# Comparison with traditional approach
print ""
print "=== Traditional vs ?? Operator ==="
value = ""

# Traditional way
if value == ""
    traditional = "default"
else
    traditional = value
endif

# With ?? operator
modern = value ?? "default"

print "Traditional if/else: " + traditional
print "Using ?? operator: " + modern