The value or array of values to match against the decorated property value.
Optionalopt: Partial<ValidatorOptions>Optional configuration.
The property decorator function.
The most simple use case is to compare to a number.
class Header {
@Match(0xFE)
@Relation(PrimitiveSymbol.char)
magic: number,
}
The @Match decorator can also be used to match arrays.
class Header {
@Match([0xBE, 0xEF])
@Count(2)
@Relation(PrimitiveSymbol.char)
magic: number[],
}
Or to check the value is one of the value from an array passed as a parameter.
class Header {
@Match([1, 8, 16])
@Relation(PrimitiveSymbol.u8)
magic: number,
}
Or an ASCII string.
class Header {
@Match('.PNG')
@Count(4, { targetType: String })
@Relation(PrimitiveSymbol.char)
magic: string,
}
@Matchdecorator validates that the value of the decorated property matches a specified value.This is commonly used to enforce "magic numbers" or other fixed values in binary formats that help verify file structure or integrity.