var fs = require('fs');
-import { argv, resourceUsage } from 'node:process';
-import * as tk from './tokenize.js';
+import jsTokens from "js-tokens";
import * as util from 'util';
-import { drawEllipsePath, reduceRotation } from 'pdf-lib';
-import { isAnyArrayBuffer, isTypedArray } from 'node:util/types';
-import { error } from 'node:console';
-import { isUndefined } from 'node:util';
/**
- * debug reprensenting
- */
-let repr = (x : any)=>{return util.inspect(x, {depth: null})};
-
-/**
- * token tree type.
- */
-type tkTree = tkTree[] | tk.Token
-
-/**
- * concated 2 `tkTree`s
- * @param x the array to be concated
- * @param y the item or array to ve concated
- * @returns concated tkTree array, or thrown error if can't be concated.
- */
-function concat(x: tkTree, y:tkTree): tkTree[] {
- if (Array.isArray(x)){
- return x.concat(y);
- }else{
- throw new Error("the tkTree can't be concated, because it's not an array.");
-
- }
-}
-
-function slice(x: tkTree, index?:number, end?:number): tkTree[] {
- if (Array.isArray(x)){
- return x.slice(index,end);
- }else{
- throw new Error("the tkTree can't be concated, because it's not an array.");
-
- }
-}
-
-/**
- * TokenMatcheePair for tokens' parser combinator
- *
- * matched: the matched (now and before) tokens
- *
- * remained: tokens to be matched
*
- * ast: abstract syntax tree
+ * # REPRESENTATION
*/
-export interface TokenMatcheePair {
- matched: tk.Token[]
- remained: tk.Token[]
- ast : tkTree[]
-}
-
/**
* convert a `tkTree` AST to S-expr string
* @param t the `tkTree`
if (t=== undefined){
str = "%undefined"
}else{
- str = t.text;
+ str = t.value;
}
}
return str;
}
+/**inspect the inner of the representation. */
+let repr = (x : any)=>{return util.inspect(x, {depth: null})};
/**
- * @description
- * match one token type.
*
- * it returns a function which test if the type of first token of the `remained` part of
- * the argument of the function is `typ` , if it's true, update the `TokenMatcheePair` wrapped
- * in `Some`. Otherwise, it returns `None`.
- * * @param typ : the type to be test.
- * @returns the updated `TokenMatcheePair` wrapped in `Some(x)` or `None`.
+ * # TYPES
*/
-export function m1TType(typ: tk.TokenType):
- (m: TokenMatcheePair) => tk.Maybe<TokenMatcheePair> {
- return (m: TokenMatcheePair) => {
- if (m.remained.length == 0) {
- return { _tag: "None" };
- }
- /**
- * token to be matched
- * */
- const ttbm = m.remained[0];
-
- if (ttbm.type == typ) {
- let new_matched = m.matched.concat(ttbm);
- let result : tk.Some<TokenMatcheePair> = {
- _tag: "Some", value: {
- matched: new_matched,
- remained: m.remained.slice(1),
- ast: ([ttbm]),
- }
- };
- return result;
- }
- else {
- return { _tag: "None" };
- }
- }
-};
/**
- * type int
+ * TokenPair for tokens' parser combinator
+ *
+ * matched: the matched (now and before) tokens
+ *
+ * remained: tokens to be matched
+ *
+ * ast: abstract syntax tree
*/
-let tInt = m1TType(tk.TokenType.INT);
-let tId = m1TType(tk.TokenType.ID);
-
-
-let tAdd = m1TType(tk.TokenType.I_ADD);
-let tSub = m1TType(tk.TokenType.I_SUB);
-let tMul = m1TType(tk.TokenType.I_MUL);
-let tDiv = m1TType(tk.TokenType.I_DIV);
-let tLParen = m1TType(tk.TokenType.L_PAREN);
-let tRParen = m1TType(tk.TokenType.R_PAREN);
-
-let toSome = tk.toSome;
-
+export interface TokenPair {
+ matched: jsTokens.Token[]
+ remained: jsTokens.Token[]
+ ast : tkTree[]
+}
+export type Some<T> = { _tag: "Some"; value: T };
+export type None = { _tag: "None" };
+export type Maybe<T> = Some<T> | None;
-argv.forEach((val, index) => {
- console.log(`${index}=${val}`);
-});
+type Token = jsTokens.Token;
+type tkTree = Token | tkTree[];
+/**
+ *
+ * # PARSER UNITS
+ */
+function toSome<T>(x:T): Maybe<T>{
+ return {_tag: "Some", value: x};
+}
/**
* like `m ==> f` in ocaml
* @param f matching function
* @returns wrapped result
*/
-function thenDo(m : tk.Maybe<TokenMatcheePair>, f : Function){
+function thenDo(m : Maybe<TokenPair>, f : Function){
if (m._tag == "None"){
return m;
}else{
- var a : tk.Maybe<TokenMatcheePair> = f(m.value);
+ var a : Maybe<TokenPair> = f(m.value);
if (a._tag == "Some"){
- a.value.ast = concat(m.value.ast, a.value.ast);
+ a.value.ast = m.value.ast.concat(a.value.ast);
}
return a;
}
}
-
-/**
- * like `f1 | f2` in regex
- * @param f1 the first tried function
- * @param f2 the second tried function
- * @returns wrapped result
- */
-function orDo(f1 : Function, f2 : Function){
- return (x : TokenMatcheePair) =>{
- let res1 : tk.Maybe<TokenMatcheePair> = f1(x);
- if (res1._tag == "Some"){
- return res1;
- }else{
- let res2 : tk.Maybe<TokenMatcheePair> = f2(x);
- return res2;
- }
- }
-}
-
-
/**
*
- * @param m : the `MatcheePair` to be consumed.
+ * @param m : the `TokenPair` to be consumed.
* @returns if the length of `m.remained` >= 1; consumes the matchee by 1 token
* and wraps it in `Some`,
* otherwise, returns `None`.
*/
-export function matchAny(m: TokenMatcheePair): tk.Maybe<TokenMatcheePair> {
+export function matchAny(m: TokenPair): Maybe<TokenPair> {
if (m.remained.length >= 1) {
return {
_tag: "Some", value: {
}
/**
- * Danger : Maybe it's not enough to work.
-* @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 OnceOrMoreDo(f: Function): (x: TokenMatcheePair) =>
- tk.Maybe<TokenMatcheePair> {
- return (x) => {
- var wrappedOldX: tk.Maybe<TokenMatcheePair> = { _tag: "Some", value: x };
- var wrappedNewX: tk.Maybe<TokenMatcheePair> = wrappedOldX;
-
- var counter = -1;
-
- while (wrappedNewX._tag != "None") {
- wrappedOldX = wrappedNewX;
- wrappedNewX = thenDo(wrappedOldX, f);
- counter += 1;
-
- };
-
-
- if (counter <= 0){
- return { _tag: "None"};
+ * like `f1 | f2` in regex
+ * @param f1 the first tried function
+ * @param f2 the second tried function
+ * @returns wrapped result
+ */
+function orDo(f1 : Function, f2 : Function){
+ return (x : TokenPair) =>{
+ let res1 : Maybe<TokenPair> = f1(x);
+ if (res1._tag == "Some"){
+ return res1;
+ }else{
+ let res2 : Maybe<TokenPair> = f2(x);
+ return res2;
}
- let ast = wrappedOldX.value.ast ;
- wrappedOldX.value.ast =ast.slice(ast.length-counter);
- console.log(repr(wrappedOldX.value.ast));
-
- return wrappedOldX; };
+ }
}
/**
- * aux function for midfix operator
- * @param f function
- * @param signal the rule name
- * @returns
+ * like regex [^c]
+ * @param f input token function. one token only.
+ * @returns combined finction
*/
-let midfix = (f : Function, signal? : string) => (x : TokenMatcheePair)=>{
- var a = f(x);
- if (a._tag == "Some"){
- let ast_tail : tkTree[] = slice(a.value.ast,a.value.ast.length-3);
- let new_ast = [ast_tail];
- a.value.ast = new_ast;
-
- // console.log("+"+signal+"+"+repr(a));
-
-
- }
- return a;
-}
-
-let circumfix = (f : Function, signal? : string) => (x : TokenMatcheePair)=>{
- var a = f(x);
- if (a._tag == "Some"){
- let inner = a.value.ast[a.value.ast.length-2];
- let ast_middle : tkTree[] = [inner];
- let new_ast = [ast_middle];
- a.value.ast = new_ast;
- }
- return a;
+function notDo(f : Function){
+ return (x : TokenPair) =>{
+ let res1 : Maybe<TokenPair> = f(x);
+ if (res1._tag == "Some"){
+ return {_tag:"None"};
+ }else{
+ let res2 = matchAny(x);
+ return res2;
+ }
+ }
}
-/**
- * TODO: 12(13)(14) only parsed with only 12(13)
- */
-/** single1 = tInt | "(" expr ")"*/
-let single1 = circumfix((x : TokenMatcheePair) =>
- thenDo(thenDo(thenDo(tk.toSome(x), tLParen), expr), tRParen), "fac1");
-let single2= tInt;
-let single = orDo(single1, single2);
-
-/** func = single | single "(" single ")"
- * i.e.
- *
- * func = single | func_aux ( int )
- *
-*/
-
-
-/** fac = single ["(" single ")"]? | single
- * Issue1 to be fixed.
- */
-let fac1Appliee = circumfix((x : TokenMatcheePair) => thenDo(thenDo(thenDo(tk.toSome(x), tLParen), tInt), tRParen), "fac1");
-let fac1 = (x : TokenMatcheePair) =>
- {
- let raw = thenDo(thenDo(toSome(x), single), OnceOrMoreDo(fac1Appliee));
-
-
-
- if (raw._tag == "Some"){
-
-
- var result : tkTree = raw.value.ast[0];
- let applyToken : tk.Token = {text: '%apply', ln:0, col:0};
- for (var i=1; i<raw.value.ast.length; i++){
- result = [applyToken, result, raw.value.ast[i]];
- }
-
- if (!Array.isArray(result)){
- raw.value.ast = [result];
+function matchToken(typeName : string, value? : string):
+ (t : TokenPair) => Maybe<TokenPair>{
+ return (t)=>{
+ let headToken = t.remained[0];
+ if (headToken.type != typeName){
+ return {_tag:"None"};
+ }else{
+ if (value === undefined || value == headToken.value){
+ let newTokenPair = {
+ matched: t.matched.concat(headToken),
+ remained: t.remained.slice(1),
+ ast : [headToken]
+ };
+ return {_tag : "Some", value : newTokenPair};
}else{
- raw.value.ast = result;
+ return {_tag:"None"};
}
- }
-
-
-
-
- return raw;
- };
-let fac2 = single;
-let fac = orDo(fac1, fac2);
-
-
-
-/**
- *
- * term1 = fac (MUL | DIV) fac
- */
-
-let term1 = midfix((x : TokenMatcheePair)=>
- thenDo(thenDo(thenDo(tk.toSome(x), fac), orDo(tMul,tDiv)), fac), "term1");
-
-
-/**
- *
- * term2 = int MUL int
- */
-let term2 = fac;
+ };
+ }
+};
-/**
- * term = term1 | term2
- */
-let term = orDo(term1, term2);
-
/**
*
- * expr1 = term ADD term
+ * # TEST
*/
-let expr1 = midfix((x : TokenMatcheePair)=>
- thenDo(thenDo(thenDo(tk.toSome(x), term), orDo(tAdd,tSub)), term), "expr1");
-/**
- * expr2 = term
- */
-let expr2 = term;
-
-/**
- * expr = expr1 | expr2
- */
-let expr = orDo(expr1, expr2);
-
+const tokens = Array.from(jsTokens(
+`import foo from\t 'bar';
+import * as util from 'util';
-let tokens = tk.tokenize("1");
-let tokens2 = tk.tokenize("1(2)");
-let tokens3 = tk.tokenize("1(2)(3)");
-let tokens4 = tk.tokenize("(3(2))*2+1");
+花非花，霧\\{非霧 。{{foo();}}下
+一句`));
-//let tokens = tk.tokenize("(4-(3/4))");
-//tk.tokenize(argv[2]);
+console.log("RESULT="+repr(tokens));
-let tokensFiltered = tokens4.filter(
- (x)=>{return (x.type != tk.TokenType.NL
- && x.type != tk.TokenType.SP)});
+var mainTokenPair : TokenPair = {
+ matched : [] ,
+ remained : tokens,
+ ast : []};
+let a = thenDo(thenDo(toSome(mainTokenPair), matchToken('IdentifierName')),
+ notDo(matchToken('Punctuator', ';')));
-let beta = expr({
- matched : [] ,
- remained : tokensFiltered,
- ast : []});
-if (beta._tag == "Some"){
- console.log(tkTreeToSExp(beta.value.ast));
+console.log("RESULT="+repr(a));
+if (a._tag == "Some"){
+ console.log("SEXP="+tkTreeToSExp(a.value.ast));
}
-
-console.log("RESULT="+repr(beta));
-
projects / clo / blobdiff