@Override
	public int getInstructionLength(ConstantValue cv) {
		return 0;
	}
"Solves" constant expressions

<p>
Essentially, this either evaluates successfully when asked for a constant value, or checks that
the goal is equal to the constant. Otherwise, there is no solution.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/assembler/sleigh/expr/ConstantValueSolver.java