"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
-exports.thenDo = exports.charToCodepoint = exports.matchRange = exports.match1Char = void 0;
+exports.tokenize = exports.zeroOrOnceDo = exports.notDo = exports.zeroOrMoreDo = exports.orDo = exports.thenDo = exports.charToCodepoint = exports.matchRange = exports.matchAny = exports.match1Char = void 0;
var fs = require('fs');
+/**
+ * wrap a x in a `Some(T)`
+ * @param x : variable to be wrapped.
+ * @returns wrapped `x`.
+ */
+function toSome(x) {
+ return { _tag: "Some", value: x };
+}
/**
* @description
* it returns a function which test if the first char of the `remained` part of
*/
function match1Char(c) {
return (m) => {
+ if (m.remained.length == 0) {
+ return { _tag: "None" };
+ }
const charToBeMatched = m.remained[0];
if (charToBeMatched === c) {
return { _tag: "Some", value: {
}
exports.match1Char = match1Char;
;
+/**
+ *
+ * @param m : the `MatcheePair` to be consumed.
+ * @returns if the length of `m.remained` >= 1; consumes the matchee by 1 char and wraps it in `Some`,
+ * otherwise, returns `None`.
+ */
+function matchAny(m) {
+ if (m.remained.length >= 1) {
+ return { _tag: "Some", value: {
+ matched: m.matched + m.remained[0],
+ remained: m.remained.substring(1)
+ } };
+ }
+ else {
+ return { _tag: "None" };
+ }
+}
+exports.matchAny = matchAny;
/**
* @description
* it returns a function which test if the first char of the `remained` part of
throw new Error("Error: the codepoint of `" + l + "` is not smaller than `" + u + "`)");
}
return (m) => {
+ if (m.remained.length < 1) {
+ return { _tag: "None" };
+ }
const charToBeMatched = m.remained[0];
const codePointToBeMatched = charToCodepoint(charToBeMatched);
if (codePointToBeMatched >= lCodepoint && codePointToBeMatched <= uCodepoint) {
/**
* @description thendo(input, f, ...) like
* a ==> f
+ * @param input: the wrapped input.
+ * @param f: the function to be applied.
+ *
+ * @returns:the applied wrapped result `MatcheePair`.
*/
function thenDo(input, f) {
if (input._tag == "None") {
}
}
exports.thenDo = thenDo;
+/**
+ * @description "or", like the regex `( f1 | f2 )` .
+ * It returns a function `f` of which the argument is`x`.
+ * if `f1(x)` is None, then `f` returns `f2(x)`. Otherwise,
+ * `F` returns `f1(x)`.
+ * @param f1 : 1st function to be compared
+ * @param f2 : 2nd function to be compared
+ * @returns:the combined function
+ */
+function orDo(f1, f2) {
+ return (x) => {
+ let f1x = (f1(x));
+ {
+ if (f1x._tag == "None") {
+ return f2(x);
+ }
+ else {
+ return f1x;
+ }
+ }
+ };
+}
+exports.orDo = orDo;
+/**
+* @description repeating matching function `f`
+* zero or more times, like the asterisk `*` in regex `f*` .
+* @param f : the function to be repeated 0+ times.
+* @returns:the combined function
+*/
+function zeroOrMoreDo(f) {
+ return (x) => {
+ var wrapped_old_x = { _tag: "Some", value: x };
+ var wrapped_new_x = wrapped_old_x;
+ while (wrapped_new_x._tag != "None") {
+ wrapped_old_x = wrapped_new_x;
+ wrapped_new_x = thenDo(wrapped_old_x, f);
+ }
+ ;
+ return wrapped_old_x;
+ };
+}
+exports.zeroOrMoreDo = zeroOrMoreDo;
+/**
+* @description Not. like the `^` inside regex of [^f].
+* returns a function `F(x)` such that if `f(x)` is `None`,
+* returns the x consuming a char; if `f(x)` is not None, F(x)
+* returns `None`.
+* @param f: the function forbidden to be matched.
+* @returns: combined function `F`.
+*/
+function notDo(f) {
+ return (x) => {
+ let wrapped_x = {
+ _tag: "Some",
+ value: x
+ };
+ let f_x = thenDo(wrapped_x, f);
+ if (f_x._tag != "None") {
+ return { _tag: "None" };
+ }
+ else {
+ return thenDo(wrapped_x, matchAny);
+ }
+ };
+}
+exports.notDo = notDo;
+/**
+ * if `x` is matched by `f` once, returns `f(x)`. Otherwise,
+ * returns x
+ * similar to `?` in regex `f?`.
+ * @param f : the function to be matched
+ * @returns return wrapped f(x)
+ */
+function zeroOrOnceDo(f) {
+ return (x) => {
+ var wrapped_old_x = { _tag: "Some", value: x };
+ var wrapped_new_x = thenDo(wrapped_old_x, f);
+ if (wrapped_new_x._tag != "None") {
+ return wrapped_new_x;
+ }
+ else {
+ return wrapped_old_x;
+ }
+ };
+}
+exports.zeroOrOnceDo = zeroOrOnceDo;
+function tokenize(input) {
+ var input_matchee_pair = toSome({ matched: "",
+ remained: input });
+ // integer = ([+]|[-])\d\d?
+ let integer = (x) => {
+ let wrapped_x = toSome(x);
+ let plusMinus = orDo(match1Char('+'), match1Char('-')); // ([+]|[-])
+ let d = matchRange('0', '9'); // \d
+ return thenDo(thenDo(thenDo(wrapped_x, zeroOrOnceDo(plusMinus)), d), zeroOrMoreDo(d));
+ };
+ console.log(input + ", result: ");
+ console.log(thenDo(input_matchee_pair, integer));
+}
+exports.tokenize = tokenize;
+tokenize("+123");
+tokenize("123");
+tokenize("-123");
+tokenize(" 123");
+tokenize("c123");