X-Git-Url: https://git.kianting.info/?a=blobdiff_plain;f=src%2Findex.ts;h=405a1f0d465ffcf04867c6a2bb3c09c083c3b9b6;hb=ae71f2351bd6ffb5e054687dd1e3eb99f72545fe;hp=8cbd145671c4508ca55759035ba2da57c1edcccb;hpb=e2668789e238707fa38ce3e724e3b64fba5d53b3;p=clo

diff --git a/src/index.ts b/src/index.ts
index 8cbd145..405a1f0 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,256 +1,37 @@
 var fs = require('fs');
+import jsTokens from "js-tokens";
+import * as util from 'util';
 
-export type Some<T> = { _tag: "Some"; value: T };
-export type None = {_tag: "None"};
+/**inspect the inner of the representation. */
+let repr = (x : any)=>{return util.inspect(x, {depth: null})};
 
-
-/**
- * wrap a x in a `Some(T)`
- * @param x : variable to be wrapped.
- * @returns wrapped `x`.
- */
-function toSome<T>(x: T): Some<T>{
-    return  { _tag: "Some", value: x};  
-}
 /**
- * @description Like the `Some(a)` and `None` in Rust.
- *
- * @example
- * ```ts
- * let exam1 : Maybe<Number> = { _tag: "Some", value: 12 };
- * let exam2 : Maybe<Number> = None;
- * ```
+ * like `m ==> f` in ocaml
+ * @param m matchee wrapped
+ * @param f matching function
+ * @returns wrapped result
  */
-export type Maybe<T> = Some<T> | None;
-
-
-/**
- * @description
- * the pair of the string to be matched later and the string that have been matched
-*/
-export interface MatcheePair {
-    /** have been matched */
-    matched : string
-    /** will be tested whether it'll be matched. */
-    remained : string
-}
-
-/**
- * @description
- * it returns a function which test if the first char of the `remained` part of
- *  the argument of the function is `c`, if it's true, update the `MatchedPair` wrapped
- * in `Some`. Otherwise, it returns `None`.
- *  * @param c : the char to be test.
- * @returns the updated `MatchedPair` wrapped in `Some(x)` or `None`.
- */
-export function match1Char(c : string) : (m: MatcheePair) => Maybe<MatcheePair> {
-    return (m : MatcheePair)=>{
-        if (m.remained.length == 0){
-            return { _tag: "None" };
-        }
-        const charToBeMatched = m.remained[0];
-        if (charToBeMatched === c){
-            return {_tag: "Some", value :{
-                    matched : m.matched + charToBeMatched,
-                    remained : m.remained.substring(1)}};
-        }
-        else{
-            return {_tag: "None"};
-        }
-    }
-};
-
-/**
- * 
- * @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`.
- */
-export function matchAny(m : MatcheePair) : Maybe<MatcheePair>{
-    if (m.remained.length >= 1){
-        return {_tag: "Some", value :{
-            matched : m.matched + m.remained[0],
-            remained : m.remained.substring(1)}};
+function thenDo(m : tk.Maybe<TokenMatcheePair>, f : Function){
+    if (m._tag == "None"){
+        return m;
     }else{
-        return {_tag: "None"};
-    }
-}
-
-/**
- * @description
- * it returns a function which test if the first char of the `remained` part of
- *  the argument of the function is between `l` and `u`, if it's true, update the `MatchedPair` wrapped
- * in `Some`. Otherwise, it returns `None`.
- *  * @param l : lower bound char, 1-char string
- *  * @param u : upper bound char, 1-char string
- * @returns the updated `MatchedPair` wrapped in `Some(x)` or `None`.
- */
-export function matchRange(l : string, u : string) : (m: MatcheePair) => Maybe<MatcheePair> {
-    let lCodepoint = charToCodepoint(l);
-    let uCodepoint = charToCodepoint(u);
-    if (l > u){
-        throw new Error("Error: the codepoint of `"+l+"` is not smaller than `"+u+"`)");
-    }
-    return (m : MatcheePair)=>{
-        if (m.remained.length < 1){
-            return {_tag : "None"};
-        }
-        const charToBeMatched = m.remained[0];
-        const codePointToBeMatched = charToCodepoint(charToBeMatched);
-        if (codePointToBeMatched >= lCodepoint && codePointToBeMatched <= uCodepoint){
-            return {_tag: "Some", value :{
-                    matched : m.matched + charToBeMatched,
-                    remained : m.remained.substring(1)}};
-        }
-        else{
-            return {_tag: "None"};
+        var a : tk.Maybe<TokenMatcheePair> = f(m.value);
+        if (a._tag == "Some"){
+            a.value.ast = concat(m.value.ast, a.value.ast);
         }
-    }
-};
-
-/**
- * convert the one-char string to codepoint.
- * @param s : the string to code point.
- * @returns if `s.length > 1` return error; otherwise, return the codepoint of `s`.
- */
-export function charToCodepoint(s : string): number{
-    if (s.length > 1){
-        throw new Error("Error: the length of input string for "+s+ "is "+s.length+`,
-        however, it should be 1.`);
-    }else{
-        return s.charCodeAt(0);
-    }
-}
 
-/**
- *  @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`.
- */
-export function thenDo<T>(input : Maybe<T>, f : Function) : Maybe<T>{
-    if (input._tag == "None"){
-        return input;
-    }
-    else{
-        let inner = input.value;
-        return f(inner);
+        return a;
     }
 }
 
-/**
- * @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
- */
-export function orDo<T>(f1 : Function, f2: Function) : (x : T ) => Maybe<T>{
-    return (x) => {
-        let f1x : Maybe<T> = (f1(x));
-        {
-            if (f1x._tag == "None"){
-                return f2(x);
-            }
-            else{
-                return f1x;
-            }
-        }
-    };
-}
+const tokens = Array.from(jsTokens(`
+import foo from\t 'bar';
+import * as util  from 'util';
 
 
-/**
-* @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
-*/
-export function zeroOrMoreDo<T>(f : Function): (x : T) => Maybe<T>{
-    return (x)=>{
-        var wrapped_old_x : Maybe<T> = {_tag: "Some", value : x};
-        var wrapped_new_x : Maybe<T> = wrapped_old_x;
+花非花，霧\\{非霧 。{{foo();}}下
+一句`));
 
-        while (wrapped_new_x._tag != "None"){
-            wrapped_old_x = wrapped_new_x;
-            wrapped_new_x = thenDo(wrapped_old_x, f);
-        };
 
-        return wrapped_old_x;
-    };
-}
-
-/**
-* @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`.
-*/
-export function notDo<T>(f : Function): (x : T) => Maybe<T>{
-    return (x)=>{
-        let wrapped_x : Maybe<T> = {
-            _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);
-        }
-    };
-}
-
-/**
- * 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)
- */
-export function zeroOrOnceDo<T>(f : Function): (x : T) => Maybe<T>{
-    return (x)=>{
-        var wrapped_old_x : Maybe<T> = {_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;
-        }
-    };
-}
-
-
-export function tokenize(input : string){
-    var input_matchee_pair : Maybe<MatcheePair> = toSome(
-        {matched:"",
-        remained: input});
-
-    // integer = ([+]|[-])?\d\d*
-    let integer = (x : MatcheePair) => 
-    { 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));
-    // TODO: id, string, space, basic operator, 3 marks: @, {, }.
-
-}
+console.log("RESULT="+repr(tokens));
 
-tokenize("+123");
-tokenize("123");
-tokenize("-123");
-tokenize(" 123");
-tokenize("c123");