-/**
- * 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 */
-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};