Check for empty repetitions.

src/regexp-macro-assembler.h

Index: src/regexp-macro-assembler.h
diff --git a/src/regexp-macro-assembler.h b/src/regexp-macro-assembler.h
index 9d3ce5fd8c69dcf8d94ba558acbc87f7ad7831c1..f0ce798f346c3aaca914fddbd5f2789a0f625f04 100644
--- a/src/regexp-macro-assembler.h
+++ b/src/regexp-macro-assembler.h
@@ -135,6 +135,9 @@ class RegExpMacroAssembler {
   // Check whether a register is < a given constant and go to a label if it is.
   // Backtracks instead if the label is NULL.
   virtual void IfRegisterLT(int reg, int comparand, Label* if_lt) = 0;
+  // Check whether a register is != to the current position and go to a
+  // label if it is.

[Erik Corry, 2009/01/08 11:10:16]

Or rather, if it is not?

[Christian Plesner Hansen, 2009/01/08 12:40:49]

Whoops, forgot to update the comment when changing the method.  Fixed.

+  virtual void IfRegisterEqPos(int reg, Label* if_eq) = 0;
   virtual IrregexpImplementation Implementation() = 0;
   virtual void LoadCurrentCharacter(int cp_offset,
                                     Label* on_end_of_input,