Meisaka/WaveAsm — pull request #7 by Zardoz89 (2013-11-22 18:57:53+00:00)
Title: Added binary literal, expanded hexadecimal literal (21h and 0X21). Added ascii character literal ('a') and escaped sequences ('\n')

I don't know Perl, but I managed expand the literals. I think that would be useful to create a function to handle character and escape sequences, returning the ASCII numeric representation, so a future string literals could use it to parse the string.