// This file is part of css. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2017 The developers of css. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT.


pub trait Expression<U: Unit>
{
	/// Evaluate the Expression by returning the numeric value of the canonical dimension
	/// Division by zero is handled by returning the maximum possible f32 value
	/// Subtractions for UnsignedCssNumber that are negative are handled by returning 0.0
	#[inline(always)]
	fn evaluate<Conversion: FontRelativeLengthConversion<U::Number> + ViewportPercentageLengthConversion<U::Number> + PercentageConversion<U::Number> + AttributeConversion<U> + CssVariableConversion>(&self, conversion: &Conversion) -> Option<U::Number>;
}