How to provide disassembly instead of binary to SLEIGH decompiler

[Uxinnn]

In sleighexample.cc, it is able to read in a binary program and emulate it. However, instead of a program itself, I am looking to modify the example to take in a series of user defined instructions instead. My motivation is that I want to abstract away the need for a user to know the exact binary representation of an instruction sequence in order to use this modified version of sleighexample. Does anyone have any guidance on how I can go about doing this?

What I am aiming for:

1. Given a base starting state (E.g. All registers set to 0).
2. Read in a list of instructions. (E.g. ["LEA ECX, [ESP + 0x4]", "AND ESP, 0xfffffff0"])
3. Emulate the instructions.
4. Output modified state after emulation to the user.

I figured that Sleigh::resolve is the key function that translates an address to its corresponding AST representation before Sleighbuilder is used to convert it into pcode that can be emulated. But I am stuck at finding a way to modify Sleigh::resolve to work using plaintext instructions rather than an address in a binary.

Appreciate any advice!