fix: return values from walkTokens

src/Lexer.js

@@ -316,8 +316,9 @@ export class Lexer {
     return tokens;
   }
 
-  inline(src, tokens) {
+  inline(src, tokens = []) {
     this.inlineQueue.push({ src, tokens });
+    return tokens;
   }
 
   /**

src/Tokenizer.js

@@ -19,7 +19,7 @@ function outputLink(cap, link, raw, lexer) {
       href,
       title,
       text,
-      tokens: lexer.inlineTokens(text, [])
+      tokens: lexer.inlineTokens(text)
     };
     lexer.state.inLink = false;
     return token;
@@ -125,15 +125,13 @@ export class Tokenizer {
         }
       }
 
-      const token = {
+      return {
         type: 'heading',
         raw: cap[0],
         depth: cap[1].length,
         text,
-        tokens: []
+        tokens: this.lexer.inline(text)
       };
-      this.lexer.inline(token.text, token.tokens);
-      return token;
     }
   }
 
@@ -354,10 +352,10 @@ export class Tokenizer {
         text: cap[0]
       };
       if (this.options.sanitize) {
+        const text = this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape(cap[0]);
         token.type = 'paragraph';
-        token.text = this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape(cap[0]);
-        token.tokens = [];
-        this.lexer.inline(token.text, token.tokens);
+        token.text = text;
+        token.tokens = this.lexer.inline(text);
       }
       return token;
     }
@@ -415,17 +413,15 @@ export class Tokenizer {
         // header child tokens
         l = item.header.length;
         for (j = 0; j < l; j++) {
-          item.header[j].tokens = [];
-          this.lexer.inline(item.header[j].text, item.header[j].tokens);
+          item.header[j].tokens = this.lexer.inline(item.header[j].text);
         }
 
         // cell child tokens
         l = item.rows.length;
         for (j = 0; j < l; j++) {
           row = item.rows[j];
           for (k = 0; k < row.length; k++) {
-            row[k].tokens = [];
-            this.lexer.inline(row[k].text, row[k].tokens);
+            row[k].tokens = this.lexer.inline(row[k].text);
           }
         }
 
@@ -437,45 +433,40 @@ export class Tokenizer {
   lheading(src) {
     const cap = this.rules.block.lheading.exec(src);
     if (cap) {
-      const token = {
+      return {
         type: 'heading',
         raw: cap[0],
         depth: cap[2].charAt(0) === '=' ? 1 : 2,
         text: cap[1],
-        tokens: []
+        tokens: this.lexer.inline(cap[1])
       };
-      this.lexer.inline(token.text, token.tokens);
-      return token;
     }
   }
 
   paragraph(src) {
     const cap = this.rules.block.paragraph.exec(src);
     if (cap) {
-      const token = {
+      const text = cap[1].charAt(cap[1].length - 1) === '\n'
+        ? cap[1].slice(0, -1)
+        : cap[1];
+      return {
         type: 'paragraph',
         raw: cap[0],
-        text: cap[1].charAt(cap[1].length - 1) === '\n'
-          ? cap[1].slice(0, -1)
-          : cap[1],
-        tokens: []
+        text,
+        tokens: this.lexer.inline(text)
       };
-      this.lexer.inline(token.text, token.tokens);
-      return token;
     }
   }
 
   text(src) {
     const cap = this.rules.block.text.exec(src);
     if (cap) {
-      const token = {
+      return {
         type: 'text',
         raw: cap[0],
         text: cap[0],
-        tokens: []
+        tokens: this.lexer.inline(cap[0])
       };
-      this.lexer.inline(token.text, token.tokens);
-      return token;
     }
   }
 
@@ -644,7 +635,7 @@ export class Tokenizer {
             type: 'em',
             raw: src.slice(0, lLength + match.index + rLength + 1),
             text,
-            tokens: this.lexer.inlineTokens(text, [])
+            tokens: this.lexer.inlineTokens(text)
           };
         }
 
@@ -654,7 +645,7 @@ export class Tokenizer {
           type: 'strong',
           raw: src.slice(0, lLength + match.index + rLength + 1),
           text,
-          tokens: this.lexer.inlineTokens(text, [])
+          tokens: this.lexer.inlineTokens(text)
         };
       }
     }
@@ -695,7 +686,7 @@ export class Tokenizer {
         type: 'del',
         raw: cap[0],
         text: cap[2],
-        tokens: this.lexer.inlineTokens(cap[2], [])
+        tokens: this.lexer.inlineTokens(cap[2])
       };
     }
   }

src/marked.js

@@ -105,13 +105,7 @@ export function marked(src, opt, callback) {
     return;
   }
 
-  try {
-    const tokens = Lexer.lex(src, opt);
-    if (opt.walkTokens) {
-      marked.walkTokens(tokens, opt.walkTokens);
-    }
-    return Parser.parse(tokens, opt);
-  } catch (e) {
+  function onError(e) {
     e.message += '\nPlease report this to https://github.com/markedjs/marked.';
     if (opt.silent) {
       return '<p>An error occurred:</p><pre>'
@@ -120,6 +114,23 @@ export function marked(src, opt, callback) {
     }
     throw e;
   }
+
+  try {
+    const tokens = Lexer.lex(src, opt);
+    if (opt.walkTokens) {
+      if (opt.async) {
+        return Promise.all(marked.walkTokens(tokens, opt.walkTokens))
+          .then(() => {
+            return Parser.parse(tokens, opt);
+          })
+          .catch(onError);
+      }
+      marked.walkTokens(tokens, opt.walkTokens);
+    }
+    return Parser.parse(tokens, opt);
+  } catch (e) {
+    onError(e);
+  }
 }
 
 /**
@@ -236,10 +247,12 @@ marked.use = function(...args) {
     if (pack.walkTokens) {
       const walkTokens = marked.defaults.walkTokens;
       opts.walkTokens = function(token) {
-        pack.walkTokens.call(this, token);
+        let values = [];
+        values.push(pack.walkTokens.call(this, token));
         if (walkTokens) {
-          walkTokens.call(this, token);
+          values = values.concat(walkTokens.call(this, token));
         }
+        return values;
       };
     }
 
@@ -256,35 +269,37 @@ marked.use = function(...args) {
  */
 
 marked.walkTokens = function(tokens, callback) {
+  let values = [];
   for (const token of tokens) {
-    callback.call(marked, token);
+    values = values.concat(callback.call(marked, token));
     switch (token.type) {
       case 'table': {
         for (const cell of token.header) {
-          marked.walkTokens(cell.tokens, callback);
+          values = values.concat(marked.walkTokens(cell.tokens, callback));
         }
         for (const row of token.rows) {
           for (const cell of row) {
-            marked.walkTokens(cell.tokens, callback);
+            values = values.concat(marked.walkTokens(cell.tokens, callback));
           }
         }
         break;
       }
       case 'list': {
-        marked.walkTokens(token.items, callback);
+        values = values.concat(marked.walkTokens(token.items, callback));
         break;
       }
       default: {
         if (marked.defaults.extensions && marked.defaults.extensions.childTokens && marked.defaults.extensions.childTokens[token.type]) { // Walk any extensions
           marked.defaults.extensions.childTokens[token.type].forEach(function(childTokens) {
-            marked.walkTokens(token[childTokens], callback);
+            values = values.concat(marked.walkTokens(token[childTokens], callback));
           });
         } else if (token.tokens) {
-          marked.walkTokens(token.tokens, callback);
+          values = values.concat(marked.walkTokens(token.tokens, callback));
         }
       }
     }
   }
+  return values;
 };
 
 /**