LazyBuf_DoneGet
tvar = LazyBuf_DoneGet(&tvarBuf);
str = LazyBuf_DoneGet(&strBuf);
arg = LazyBuf_DoneGet(&buf);
cmd = LazyBuf_DoneGet(&cmdBuf);
re = LazyBuf_DoneGet(&reBuf);
Expr_SetValue(ch->expr, LazyBuf_DoneGet(&buf));
arg = LazyBuf_DoneGet(&argBuf);
Expr_SetValue(expr, LazyBuf_DoneGet(&thenBuf));
Expr_SetValue(expr, LazyBuf_DoneGet(&elseBuf));
val = LazyBuf_DoneGet(&buf);
rhs = LazyBuf_DoneGet(&rhsBuf);
v = VarNew(LazyBuf_DoneGet(&varname), "",