Move innermost_block_tracker to expression.h

I think parser-defs.h should hold declarations that can be used by
parser implementations, whereas expression.h should hold declarations
that are used by code that wants to call a parser.  Following this
logic, this patch moves innermost_block_tracker to expression.h.

1 files changed, 44 insertions, 2 deletions

diff --git a/gdb/expression.h b/gdb/expression.h
index e6e4bec..8d351b3 100644
--- a/gdb/expression.h
+++ b/gdb/expression.h
@@ -21,6 +21,7 @@
 #define EXPRESSION_H 1
 
 #include "gdbtypes.h"
+#include "symtab.h"
 
 /* While parsing expressions we need to track the innermost lexical block
    that we encounter.  In some situations we need to track the innermost
@@ -239,9 +240,51 @@ struct expression
 
 typedef std::unique_ptr<expression> expression_up;
 
+/* When parsing expressions we track the innermost block that was
+   referenced.  */
+
+class innermost_block_tracker
+{
+public:
+  innermost_block_tracker (innermost_block_tracker_types types
+			   = INNERMOST_BLOCK_FOR_SYMBOLS)
+    : m_types (types),
+      m_innermost_block (NULL)
+  { /* Nothing.  */ }
+
+  /* Update the stored innermost block if the new block B is more inner
+     than the currently stored block, or if no block is stored yet.  The
+     type T tells us whether the block B was for a symbol or for a
+     register.  The stored innermost block is only updated if the type T is
+     a type we are interested in, the types we are interested in are held
+     in M_TYPES and set during RESET.  */
+  void update (const struct block *b, innermost_block_tracker_types t);
+
+  /* Overload of main UPDATE method which extracts the block from BS.  */
+  void update (const struct block_symbol &bs)
+  {
+    update (bs.block, INNERMOST_BLOCK_FOR_SYMBOLS);
+  }
+
+  /* Return the stored innermost block.  Can be nullptr if no symbols or
+     registers were found during an expression parse, and so no innermost
+     block was defined.  */
+  const struct block *block () const
+  {
+    return m_innermost_block;
+  }
+
+private:
+  /* The type of innermost block being looked for.  */
+  innermost_block_tracker_types m_types;
+
+  /* The currently stored innermost block found while parsing an
+     expression.  */
+  const struct block *m_innermost_block;
+};
+
 /* From parse.c */
 
-class innermost_block_tracker;
 extern expression_up parse_expression (const char *,
 				       innermost_block_tracker * = nullptr,
 				       bool void_context_p = false);
@@ -270,7 +313,6 @@ struct expr_completion_base
 extern expression_up parse_expression_for_completion
      (const char *, std::unique_ptr<expr_completion_base> *completer);
 
-class innermost_block_tracker;
 extern expression_up parse_exp_1 (const char **, CORE_ADDR pc,
 				  const struct block *, int,
 				  innermost_block_tracker * = nullptr);