Change parameters to language_defn::post_parser

In the expression rewrite, Ada type resolution will be done at parse
time rather than in a post-parse pass.  At this point,
language_defn::post_parser will be removed.  However, for this to
work, the information available to post_parser must be made available
during the actual parse.

This patch refactors this code slightly to make this possible.  In
particular, "void_context_p" is passed to the parser_state
constructor, and the parser state is then passed to the post_parser
method.

gdb/ChangeLog
2020-12-16  Tom Tromey  <tom@tromey.com>

	* rust-exp.y (rust_lex_tests): Update.
	* parser-defs.h (parser_state): Add void_p parameter.
	<void_context_p>: New member.
	* parse.c (parse_exp_in_context): Update.
	* language.h (language_defn::post_parser): Remove void_context_p,
	completing, tracker parameters.  Add parser state.
	* ada-lang.c (ada_language::post_parser): Update.

1 files changed, 7 insertions, 2 deletions

diff --git a/gdb/parser-defs.h b/gdb/parser-defs.h
index 1721605..56ac5ed 100644
--- a/gdb/parser-defs.h
+++ b/gdb/parser-defs.h
@@ -109,14 +109,16 @@ struct parser_state : public expr_builder
 		int comma,
 		const char *input,
 		int completion,
-		innermost_block_tracker *tracker)
+		innermost_block_tracker *tracker,
+		bool void_p)
     : expr_builder (lang, gdbarch),
       expression_context_block (context_block),
       expression_context_pc (context_pc),
       comma_terminates (comma),
       lexptr (input),
       parse_completion (completion),
-      block_tracker (tracker)
+      block_tracker (tracker),
+      void_context_p (void_p)
   {
   }
 
@@ -192,6 +194,9 @@ struct parser_state : public expr_builder
   /* The innermost block tracker.  */
   innermost_block_tracker *block_tracker;
 
+  /* True if no value is expected from the expression.  */
+  bool void_context_p;
+
 private:
 
   /* Data structure for saving values of arglist_len for function calls whose