Conformance Levels

TON defines conformance levels to ensure consistent implementation across different parsers.

Level 1: Basic Parsing

• Parse basic object structure
• Support string, number, boolean literals
• Handle single-line comments
• Basic error reporting

Level 2: Complete Literals

• All Level 1 features
• null and undefined values
• Hexadecimal and binary numbers
• Scientific notation

Level 3: Advanced Types

• All Level 2 features
• GUID support (both formats)
• Date/time parsing (ISO 8601)
• Multi-line comments

Level 4: Collections

• All Level 3 features
• Array parsing and nesting
• Mixed-type arrays
• Empty arrays

Level 5: Multi-line Strings

• All Level 4 features
• Triple-quoted strings
• Intelligent indentation processing
• Both single and double triple quotes

Level 6: Type System

• All Level 5 features
• Class types for objects
• Type hints ($, %, &, ^)
• Property name prefixes (@)

Level 7: Enums

• All Level 6 features
• Enum parsing (|value|)
• EnumSet support
• Index and name references

Level 8: Schema Support

• All Level 7 features
• Parse schema definitions
• Basic type validation
• Required field checking

Level 9: Path-Based Validation

• All Level 8 features
• Deep path traversal (/path/to/property)
• Nested property validation
• Array element validation

Level 10: Complete Implementation

• All Level 9 features
• All validation rules
• Default value processing
• Error recovery
• Streaming support

Testing Conformance

Each level includes a test suite to verify compliance:

// level1-test.ton
{
    string = "value",
    number = 123,
    boolean = true
}

// level5-test.ton
{
    multiline = """
    This tests
    multi-line string
    processing
    """
}

// level9-test.ton
{(user)
    details = {
        profile = {
            name = "Test"
        }
    }
}

#! {(user)
    /details/profile/name = string(required)
}