--- /dev/null
+/**
+ * parser.ts - parser and js generator of clo.
+ */
+import * as p from 'typescript-parsec';
+import { Token } from 'typescript-parsec';
+
+/**
+ *
+ * # REPRESENTATION
+ */
+
+/**
+ * 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;
+ }
+ }
+
+ return str;
+}*/
+
+type tkTree = string | tkTree[];
+
+enum TokenKind {
+ Seperator, // ---
+ Semicolon, // ;
+ Number,
+ Op,
+ ExprMark, // @
+ ExcapeAt, // \@
+ Paren,
+ SpaceNL, // \s\t\n\r
+ Id,
+ Str,
+ Comment, // /* ooo */
+}
+
+/**
+ * Parsing
+ */
+const lexer = p.buildLexer([
+ [true, /^\d+(\.\d+)?/g, TokenKind.Number],
+ [true, /^[\\][\\]/g, TokenKind.Op],
+ [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],
+
+]);
+
+/**
+ *
+ * # TEST
+ */
+
+
+
+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 NOT_AT_TEXT = p.rule<TokenKind, tkTree>();
+const CONTENT = 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];
+}
+
+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;
+};
+
+
+
+
+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;
+}
+
+/**
+ * IMPORTEE: Number, Op, Paren, Id, Str, Comment,
+ */
+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),
+ );
+
+/**
+ * PROG : IMPORTS '---' CONTENT;
+ */
+PROG.setPattern(
+ p.lrec_sc(IMPORTS, p.seq(p.str('---'), CONTENT), applyParts)
+
+)
+
+/**
+ * NOT_AT_TEXT : NOT_AT
+ */
+NOT_AT_TEXT.setPattern(
+ p.apply(NOT_AT, applyNotAtText)
+);
+
+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)
+
+ )
+);
+
+/**
+ * SEMICOLON : ';';
+ */
+SEMICOLON.setPattern(
+ p.apply(p.tok(TokenKind.Semicolon), applySemiColon)
+);
+
+
+
+/**
+ * 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)
+);
+
+
+
+/**
+ * the head part of the output JS code : before import
+ */
+let outputHead = `
+/* clo, a typesetting engine, generated JS file*/
+/* CLO: beginning of head*/
+import * as clo from "clo";
+
+cl = clo.initClo();
+/* CLO: end of head*/\n`
+
+/**
+ * the middle part of the output JS code : between import part and content part
+ */
+let outputMiddle =`
+/* CLO: beginning of middle part*/
+cl.mainText = /* CLO: end of middle part*/
+`
+let outputEnd =`
+/* CLO: beginning of end part*/
+cl.generatePdf();
+/*CLO : end of end part*/
+`
+
+/**
+ * Convert `tree` (ASTTree; `tkTree`) to JS Code.
+ */
+export function treeToJS(tree : tkTree): string{
+ let head = tree[0];
+ if (head == "%clo"){
+ let totalResult = outputHead + treeToJS(tree[1]) +
+ outputMiddle + treeToJS(tree[2]) + outputEnd;
+ return totalResult;
+ }
+ if (head == "%import"){
+ let imports = tree[1];
+ if (Array.isArray(imports)){
+ let importsText = imports.map(
+ (x)=>{
+ if (Array.isArray(x)){
+ return x.join('');
+ }
+ else{
+ return x;
+ }
+ });
+ let importTextCombined = importsText.join('');
+ return importTextCombined;
+ }
+ else{
+ return imports;
+ }
+ }
+ if (head == "%content"){
+ let tail = tree[1];
+ if (Array.isArray(tail)){
+ if (tail.length == 1){
+ return treeToJS(tail);
+ }
+ let tailStrings = tail.map((x)=>treeToJS(x));
+ return "(" + tailStrings.join(').concat(') + ");";
+ }else{
+ return tail;
+ }
+ }
+ if (head == "%text"){
+ let textContents = tree[1];
+ if (Array.isArray(textContents)){
+ let decoratedArray = textContents
+ .flatMap(x=>String(x))
+ .map(x=>x.replace("\`","\\\`"));
+
+ return "[`" + decoratedArray.join("\`, \`") + "`]";
+ }else{
+ let decorated = textContents.replace("\`","\\\`");
+
+ return "[`" + decorated + "`]";
+ }
+ }
+
+ if (head == "%exprs"){
+ let content = tree[1];
+ if (Array.isArray(content)){
+ let flattenContent = content.flat();
+ return flattenContent.join('');
+ }
+ else{
+ return content;
+ }
+
+ }
+ else{
+ if (Array.isArray(tree)){
+ return tree.join('');
+ }else{
+ return tree;
+ }
+ }
+}
+
+
+/**
+ * `inputText` to `tkTree` (ASTTree)
+ */
+export function inputTextToTree(inputText : string){
+return p.expectSingleResult(
+ p.expectEOF(PROG.parse(lexer.parse(inputText))));
+}
\ No newline at end of file
projects / clo / blobdiff