Function parse_asm 

pub fn parse_asm(s: &str) -> Result<Vec<u8>, Report>

Parse EVM assembly from a string into bytecode.

Assembles EVM mnemonics from a string into raw bytecode. Supports:

• Standard EVM opcodes (ADD, PUSH1 0x42, etc.)
• Auto-sized pushes (PUSH 0x1234 picks the smallest encoding)
• Labels: name: defines a label at the current PC, PUSH %name / PUSHn %name resolves to the label’s byte offset
• Comments starting with ;
• C-style #define macros (textual expansion before parsing), with optional parameters

#define PUSH_TWO(a, b) PUSH $a PUSH $b

entry:
  PUSH_TWO(1, 2)
  ADD
  PUSH %target
  JUMP

target:
  JUMPDEST
  STOP