Maybe this is already done; I had an idea for giving the BIT instruction a partial immediate mode by setting up 8 constants in zero-page, one for each bit in a byte, allowing a two-byte BIT instruction to test a particular bit of A (without modifying A).

	const_01 = $00
	const_02 = $01
	const_04 = $02
	const_08 = $03
	const_10 = $04
	const_20 = $05
	const_40 = $06
	const_80 = $07
	
init_consts:
	lda   #$01
	ldx   #0
loop:
	sta   const_01,x
	inx
	asl   a
	bne   loop

The constants could also be placed at the same adress as their value, so that the address could be used rather than the symbol, i.e. BIT $10, but this seems too convoluted for practical use.