This project comes from going through the Clinton Jeffrey's book Build Your Own Programming Language
private String deEscape(String sin) {
StringBuilder sout = new StringBuilder(sin);
sin = sin.substring(1, sin.length() - 1);
while (sin.length() > 0) {
char c = sin.charAt(0);
if (c == '\\') {
sin = sin.substring(1);
if (sin.length() < 1) {
j0.lexErr("malformed string literal");
} else {
c = sin.charAt(0);
switch (c) {
case 't' -> sout.append("\t");
case 'n' -> sout.append("\n");
default -> j0.lexErr("unrecognized escape");
}
}
} else {
sout.append(c);
}
}
return sout.toString();
} private String deEscape(String sin) {
String sout = "";
sin = String.substring(sin, 1, sin.length() - 1);
int i;
....
if (c == '\\') {
sin = String.substring(sin, 1);
....
} else {
sout = sout + c;
}
}
return sout;
}