def esc.use
import emerging-eztoml@0.9.0.0/main.bend as EmergingEztomlimport Base
3140# apply one escape and return to the string
3141def esc.use(ee: Esc, st: St, back: Lex) -> St:
3142 match ee:
3143 case EChar{c}:
3144 st.push(st, c, back)
3145 case EUni{n}:
3146 esc.uni(st, back, n)
3147 case EFold{saw}:
3148 esc.fold.use(back, st, saw)
3149 case EBad{}:
3150 st.err(st, "invalid escape")