var fs = require('fs');
import jsTokens from "js-tokens";
import * as util from 'util';
-
+import * as p from 'typescript-parsec';
+import { Token } from 'typescript-parsec';
+import { TokenType } from "./tokenize";
/**
*
* # REPRESENTATION
if (t=== undefined){
str = "%undefined"
}else{
- str = t.value;
+ str = t;
}
}
* # TYPES
*/
+
+type tkTree = string | tkTree[];
+
+enum TokenKind {
+ Seperator, // ---
+ Semicolon, // ;
+ Number,
+ Op,
+ ExprMark, // @
+ ExcapeAt, // \@
+ Paren,
+ SpaceNL, // \s\t\n\r
+ Id,
+ Str,
+ Comment, // /* ooo */
+}
+
/**
- * TokenPair for tokens' parser combinator
- *
- * matched: the matched (now and before) tokens
- *
- * remained: tokens to be matched
- *
- * ast: abstract syntax tree
+ * Parsing
*/
-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;
+const lexer = p.buildLexer([
+ [true, /^\d+(\.\d+)?/g, TokenKind.Number],
+ [true, /^\\\@/g, TokenKind.ExcapeAt],
+ [true, /^\/\*([^/]|\/[^*])*\*\//g, TokenKind.Comment],
+ [true, /^\;/g, TokenKind.Semicolon],
+ [true, /^[-][-][-]/g, TokenKind.Seperator],
+ [true, /^[\+\-\*\/\&\|\!\^\<\>\~\=\?]+/g, TokenKind.Op],
+ [true, /^\@/g, TokenKind.ExprMark],
+ [true, /^[()\[\]{}]/g, TokenKind.Paren],
+ [true, /^["]([\"]|[\\].)*["]/g, TokenKind.Str],
+ [true, /^[']([\']|[\\].)*[']/g, TokenKind.Str],
+ [true, /^[()\[\]{}]/g, TokenKind.Paren],
+ [true, /^[^\/\\\@\s\n\t\r;]+/g, TokenKind.Id],
+ [true, /^(\s|\n|\r|\t)+/g, TokenKind.SpaceNL],
-type Token = jsTokens.Token;
-type tkTree = Token | tkTree[];
+]);
/**
*
- * # PARSER UNITS
+ * # TEST
*/
-function toSome<T>(x:T): Maybe<T>{
- return {_tag: "Some", value: x};
+const inputTxt=
+`import a as b; /*bacourt*/
+/* ba choir
+ipsum lorem*/
+
+import you as john;
+---
+
+臺中市\\\@
+
+公園
+@1+2==3;
+
+console.log("122");@
+
+山頂
+`;
+
+
+const PROG = p.rule<TokenKind, tkTree>();
+const SEGMENT = p.rule<TokenKind, tkTree>();
+const IMPORT = p.rule<TokenKind, tkTree>();
+const IMPORTS = p.rule<TokenKind, tkTree>();
+const SEMICOLON = p.rule<TokenKind, tkTree>();
+const EXCAPE_AT = p.rule<TokenKind, tkTree>();
+const NOT_AT_TEXT = p.rule<TokenKind, tkTree>();
+const CONTENT = p.rule<TokenKind, tkTree>();
+
+let doubleMinus = { type: 'Punctuator', value: '--' };
+let doubleMinus2 = p.str('--');
+const TERM = p.rule<TokenKind, tkTree>();
+
+function applySegment(input: [Token<TokenKind>, Token<TokenKind>[],
+ Token<TokenKind>]): tkTree[]{
+ let unpackedInnerExprs = input[1].map((x)=>{return x.text});
+ return ["%exprs", unpackedInnerExprs];
}
-/**
- * like `m ==> f` in ocaml
- * @param m matchee wrapped
- * @param f matching function
- * @returns wrapped result
- */
-function thenDo(m : Maybe<TokenPair>, f : Function){
- if (m._tag == "None"){
- return m;
- }else{
- var a : Maybe<TokenPair> = f(m.value);
- if (a._tag == "Some"){
- a.value.ast = m.value.ast.concat(a.value.ast);
- }
+function applySemiColon(value: Token<TokenKind.Semicolon>): tkTree{
+ return value.text;
+}
+
+function applyParts(first: tkTree,
+ second: [Token<TokenKind>, tkTree]):tkTree {
+ return ["%clo", first , second[1]];
+}
+
+
+function applyComment(value: Token<TokenKind.Comment>): tkTree[]{
+ return [value.text];
+}
+
+
+function applyImport(input: [Token<TokenKind>,Token<TokenKind>[], tkTree]) : tkTree{
+ let importTail = input[1].map(x=>x.text);
+ return ["import"].concat(importTail);
+};
+
+
+/*
+function applyImportComment(input: [Token<TokenKind>,Token<TokenKind>[],
+ tkTree, Token<TokenKind.Comment>]) : tkTree{
+ let importTail = input[1].map(x=>x.text);
+ let comment = [input[3].text];
+ return ["import"].concat(importTail).concat(comment);
+};*/
+
+function applyImports(input : [tkTree, tkTree[]]): tkTree{
+ let resultBody = [input[0]].concat(input[1]);
+ let resultWrapper = ["%import", resultBody];
+ return resultWrapper;
+};
- return a;
+
+
+
+function applyNotAtText(value : Token<TokenKind>): tkTree{
+ if (value.text == "\\\@"){
+ return '@';
}
+ else{return value.text;}
+};
+
+function applyText (input : tkTree): tkTree[]{
+ return ["%text", input];
+};
+
+function applyContent(input : tkTree[]): tkTree[]{
+ return ["%content", input];
+};
+
+function applySpaceNL(value : Token<TokenKind.SpaceNL>): tkTree{
+ return value.text;
}
+
/**
- *
- * @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`.
+ * IMPORTEE: Number, Op, Paren, Id, Str, Comment,
*/
-export function matchAny(m: TokenPair): Maybe<TokenPair> {
- 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" };
- }
-}
+let IMPORTEE = p.alt(p.tok(TokenKind.Number),
+ p.tok(TokenKind.Op),
+ p.tok(TokenKind.Paren),
+ p.tok(TokenKind.Id),
+ p.tok(TokenKind.Str),
+ p.tok(TokenKind.SpaceNL),
+ p.tok(TokenKind.Comment));
+
+let NOT_AT = p.alt(p.tok(TokenKind.Seperator),
+ p.tok(TokenKind.Semicolon),
+ p.tok(TokenKind.Number),
+ p.tok(TokenKind.ExcapeAt),
+ p.tok(TokenKind.Op),
+ p.tok(TokenKind.Paren),
+ p.tok(TokenKind.SpaceNL),
+ p.tok(TokenKind.Id),
+ p.tok(TokenKind.Str),
+ p.tok(TokenKind.Comment),
+ );
/**
- * like `f1 | f2` in regex
- * @param f1 the first tried function
- * @param f2 the second tried function
- * @returns wrapped result
+ * PROG : IMPORTS '---' CONTENT;
*/
-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;
- }
- }
-}
+PROG.setPattern(
+ p.lrec_sc(IMPORTS, p.seq(p.str('---'), CONTENT), applyParts)
+
+)
/**
- * like regex [^c]
- * @param f input token function. one token only.
- * @returns combined finction
+ * NOT_AT_TEXT : NOT_AT
*/
-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;
- }
- }
-}
+NOT_AT_TEXT.setPattern(
+ p.apply(NOT_AT, applyNotAtText)
+);
-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{
- return {_tag:"None"};
- }
- };
- }
-};
+IMPORTS.setPattern(
+ p.apply( p.seq(IMPORT, p.rep(IMPORT)), applyImports)
+);
+
+/**
+ * IMPORT :
+ * 'import' IMPORTEE* SEMICOLON |
+ * COMMENT |
+ */
+IMPORT.setPattern(
+ p.alt(
+ p.apply(p.seq(p.str('import'), p.rep_sc(IMPORTEE), SEMICOLON),
+ applyImport),
+ p.apply(p.tok(TokenKind.Comment), applyComment),
+ p.apply(p.tok(TokenKind.SpaceNL), applySpaceNL)
+ )
+);
/**
- *
- * # TEST
+ * SEMICOLON : ';';
*/
-const tokens = Array.from(jsTokens(
-`import foo from\t 'bar';
-import * as util from 'util';
+SEMICOLON.setPattern(
+ p.apply(p.tok(TokenKind.Semicolon), applySemiColon)
+);
-花非花，霧\\{非霧 。{{foo();}}下
-一句`));
-console.log("RESULT="+repr(tokens));
+/**
+ * SEGMENT : '@' NOT_AT* '@' |
+ * (NOT_AT_TEXT | EXCAPE_AT)*
+ */
+SEGMENT.setPattern(
+ p.alt(
+ p.apply(p.rep_sc(NOT_AT_TEXT), applyText),
+ p.apply(p.seq(p.str('@'), p.rep(NOT_AT), p.str('@')), applySegment),
+ )
+);
+
+/**
+ * CONTENT : SEGMENT*
+ */
+CONTENT.setPattern(
+ p.apply(p.rep(SEGMENT), applyContent)
+);
-var mainTokenPair : TokenPair = {
- matched : [] ,
- remained : tokens,
- ast : []};
+let tree = p.expectSingleResult(p.expectEOF(PROG.parse(lexer.parse(inputTxt))));
-let a = thenDo(thenDo(toSome(mainTokenPair), matchToken('IdentifierName')),
- notDo(matchToken('Punctuator', ';')));
-console.log("RESULT="+repr(a));
-if (a._tag == "Some"){
- console.log("SEXP="+tkTreeToSExp(a.value.ast));
-}
+console.log("RESULT="+tkTreeToSExp(tree));
projects / clo / blobdiff