[wasm][asm.js] Adding custom asm.js lexer.

src/parsing/scanner.cc

Index: src/parsing/scanner.cc
diff --git a/src/parsing/scanner.cc b/src/parsing/scanner.cc
index e92b97454adcda0dbe8163547fcdc80b58eba099..2ff66be6715d50d3c58d2fe55b49b7fd40f2c7eb 100644
--- a/src/parsing/scanner.cc
+++ b/src/parsing/scanner.cc
@@ -1161,10 +1161,22 @@ Token::Value Scanner::ScanTemplateStart() {
 
 Token::Value Scanner::ScanTemplateContinuation() {
   DCHECK_EQ(next_.token, Token::RBRACE);
-  next_.location.beg_pos = source_pos() - 1;  // We already consumed }
+  next_.location.beg_pos = source_pos() - 2;  // We already consumed }

[vogelheim, 2017/03/16 12:46:48]

wut?  I don't understand this change.

[bradn, 2017/03/16 17:03:15]

Mismatch on my two branches, removed.

   return ScanTemplateSpan();
 }
 
+Handle<String> Scanner::SourceUrl(Isolate* isolate) const {

[vogelheim, 2017/03/16 12:46:48]

Is this because we previously relied on v8::internal::String being declared
outside of scanner.h?

(Either way, thanks. We have way too much stuff in the headers anyhow.)

[bradn, 2017/03/16 17:03:15]

Yep.

+  Handle<String> tmp;
+  if (source_url_.length() > 0) tmp = source_url_.Internalize(isolate);
+  return tmp;
+}
+
+Handle<String> Scanner::SourceMappingUrl(Isolate* isolate) const {
+  Handle<String> tmp;
+  if (source_mapping_url_.length() > 0)
+    tmp = source_mapping_url_.Internalize(isolate);
+  return tmp;
+}
 
 void Scanner::ScanDecimalDigits() {
   while (IsDecimalDigit(c0_))