var fs = require('fs');
-import { argv } from 'node:process';
+import { argv, resourceUsage } from 'node:process';
import * as tk from './tokenize.js';
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 = tk.Token[] | tk.Token
+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
+ */
export interface TokenMatcheePair {
- matched: tkTree[]
+ matched: tk.Token[]
remained: tk.Token[]
+ ast : tkTree[]
+}
+
+/**
+ * convert a `tkTree` AST to S-expr string
+ * @param t the `tkTree`
+ * @returns S-expr String
+ */
+export function tkTreeToSExp(t: tkTree): string{
+ var str = "";
+
+ if (Array.isArray(t)){
+ let strArray = t.map((x)=>tkTreeToSExp(x));
+ str = "(" + strArray.join(" ") + ")";
+ }else{
+ if (t=== undefined){
+ str = "%undefined"
+ }else{
+ str = t.text;
+ }
+ }
+
+ return str;
}
/**
const ttbm = m.remained[0];
if (ttbm.type == typ) {
- m.matched.push(ttbm);
- return {
+ let new_matched = m.matched.concat(ttbm);
+ let result : tk.Some<TokenMatcheePair> = {
_tag: "Some", value: {
- matched: m.matched,
- remained: m.remained.slice(1)
+ matched: new_matched,
+ remained: m.remained.slice(1),
+ ast: ([ttbm]),
}
};
+ return result;
}
else {
return { _tag: "None" };
}
};
+/**
+ * type int
+ */
+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;
-let thenDo = tk.thenDo;
-let orDo = tk.orDo;
argv.forEach((val, index) => {
console.log(`${index}=${val}`);
});
-let commandInput = argv[2];
-let commandInputTokenized = tk.tokenize(commandInput);
-console.log(commandInputTokenized);
/**
- * matchee pair of commandInputTokenized
+ * like `m ==> f` in ocaml
+ * @param m matchee wrapped
+ * @param f matching function
+ * @returns wrapped result
*/
-let commandTPair : TokenMatcheePair = {matched:[],
- remained: commandInputTokenized};
-
-
-let tInt = m1TType(tk.TokenType.INT);
-let tFlo = m1TType(tk.TokenType.FLO);
-let tStr = m1TType(tk.TokenType.STR);
-function tBool (x : TokenMatcheePair) :tk.Maybe<TokenMatcheePair> {
- let text = x.remained[0].text
- if (text == "true" || text == "false"){
- return thenDo(toSome(x), m1TType(tk.TokenType.ID));
+function thenDo(m : tk.Maybe<TokenMatcheePair>, f : Function){
+ if (m._tag == "None"){
+ return m;
}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);
+ }
+
+ return a;
}
}
/**
- * define the right hand side of a grammar
- * eg. `LHS ::= a + b`
- * @param process the right hand side processing : eg. `a + b` in `LHS`
- * @param arrange define the order (0 starting) of the elements of the result.
- * ast. : eg. `a + c` is `1 0 2` `(+ a c)`
- * @returns the processed ast.
+ * like `f1 | f2` in regex
+ * @param f1 the first tried function
+ * @param f2 the second tried function
+ * @returns wrapped result
*/
-function gramRHS (process: Function, arrange : number[]){
- return (m : TokenMatcheePair)=>{
+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;
+ }
+ }
+}
- let result : tk.Maybe<TokenMatcheePair> = process(m);
- console.log(`result ${result}`)
- if (result._tag == "None"){
- return result;
+
+/**
+ *
+ * @param m : the `MatcheePair` 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> {
+ if (m.remained.length >= 1) {
+ return {
+ _tag: "Some", value: {
+ matched: m.matched.concat(m.remained[0]),
+ remained: m.remained.slice(1),
+ ast : [m.remained[0]],
+ }
+ };
+ } else {
+ return { _tag: "None" };
}
- else{
- let matched = result.value.matched;
- let return_array : tkTree[] = Array(arrange.length);
+}
+
+/**
+ * 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"};
+ }
+ 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
+ */
+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;
- arrange.forEach((val, index) => {
- return_array[arrange[index]] = matched[index];
- });
+ // console.log("+"+signal+"+"+repr(a));
- return return_array;
+
}
+ 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;
}
/**
- * CONST ::= INT | STR | FLO | BOOL
+ * 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];
+ }else{
+ raw.value.ast = result;
+ }
+ }
+
+
+
+
+ return raw;
+ };
+let fac2 = single;
+let fac = orDo(fac1, fac2);
+
+
+
+/**
+ *
+ * term1 = fac (MUL | DIV) fac
*/
-var constParser = gramRHS((x : TokenMatcheePair)=>
- {return thenDo(toSome(x),orDo(orDo(orDo(tInt,tFlo),tStr),tBool))}, [0]);
-let tree = constParser(commandTPair);
-console.log(util.inspect(tree, { showHidden: true, depth: null }));
+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
+ */
+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);
+
+
+
+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");
+
+//let tokens = tk.tokenize("(4-(3/4))");
+//tk.tokenize(argv[2]);
+
+let tokensFiltered = tokens4.filter(
+ (x)=>{return (x.type != tk.TokenType.NL
+ && x.type != tk.TokenType.SP)});
+
+
+
+let beta = expr({
+ matched : [] ,
+ remained : tokensFiltered,
+ ast : []});
+
+if (beta._tag == "Some"){
+ console.log(tkTreeToSExp(beta.value.ast));
+}
+
+console.log("RESULT="+repr(beta));
+
projects / clo / blobdiff