Implemented compilation to SSA form

src/core/Unescape.go

@@ -0,0 +1,43 @@
+package core
+
+import "bytes"
+
+// Unescape replaces the escape sequences in the contents of a string token with the respective characters.
+func Unescape(data []byte) []byte {
+	data = data[1 : len(data)-1]
+	escape := bytes.IndexByte(data, '\\')
+
+	if escape == -1 {
+		return data
+	}
+
+	tmp := make([]byte, 0, len(data))
+
+	for {
+		tmp = append(tmp, data[:escape]...)
+
+		switch data[escape+1] {
+		case '0':
+			tmp = append(tmp, '\000')
+		case 't':
+			tmp = append(tmp, '\t')
+		case 'n':
+			tmp = append(tmp, '\n')
+		case 'r':
+			tmp = append(tmp, '\r')
+		case '"':
+			tmp = append(tmp, '"')
+		case '\'':
+			tmp = append(tmp, '\'')
+		case '\\':
+			tmp = append(tmp, '\\')
+		}
+
+		data = data[escape+2:]
+		escape = bytes.IndexByte(data, '\\')
+
+		if escape == -1 {
+			return tmp
+		}
+	}
+}