-/**
- * like `f1 | f2` in regex
- * @param f1 the first tried function
- * @param f2 the second tried function
- * @returns wrapped result
- */
-function orDo(f1, f2) {
- return (x) => {
- let res1 = f1(x);
- if (res1._tag == "Some") {
- return res1;
- }
- else {
- let res2 = f2(x);
- return res2;
- }
- };
-}
-/**
- * aux function for midfix operator
- * @param f function
- * @param signal the rule name
- * @returns
- */
-let midfix = (f, signal) => (x) => {
- var a = f(x);
- if (a._tag == "Some") {
- let ast_tail = 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, signal) => (x) => {
- var a = f(x);
- if (a._tag == "Some") {
- let inner = a.value.ast[a.value.ast.length - 2];
- console.log("AST====" + repr(a.value.ast));
- let ast_middle = [inner];
- let new_ast = [ast_middle];
- a.value.ast = new_ast;
- console.log("+" + signal + "+" + repr(a));
- }
- return a;
-};
-/** fac1 = "(" expr ")" */
-let fac1 = circumfix((x) => thenDo(thenDo(thenDo(tk.toSome(x), tLParen), expr), tRParen), "fac1");
-let fac2 = tInt;
-let fac = orDo(fac1, fac2);
-/**
- *
- * term1 = fac (MUL | DIV) fac
- */
-let term1 = midfix((x) => 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) => 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("(4-(3/4))"); //tk.tokenize(argv[2]);
-let tokensFiltered = tokens.filter((x) => {
- return (x.type != tk.TokenType.NL
- && x.type != tk.TokenType.SP);
-});
-let wrappedTokens = tk.toSome({
- matched: [],
- remained: tokensFiltered,
- ast: []
-});
-let beta = expr({
- matched: [],
- remained: tokensFiltered,
- ast: []
-});
-console.log(repr(beta));