Re: [RFA] Add language-dependent post-parser

[Daniel Jacobowitz <drow at false dot org>]

On Wed, Apr 07, 2004 at 05:32:35AM -0400, Paul Hilfinger wrote:
> 
> Here is a second version of the post-parser patch I submitted before.
> The Ada module will use the post-parser to do static overloaded name
> resolution at translation time.  The patch gives the current languages
> a default nop post-parser.
> 
> I think I have addresses Daniel's comments.  In this revision, I have
> simplified the interface to the post-parser and to
> parse_expression_in_context so that instead of an expected type, they
> just take a flag indicating whether the client expects a value (as
> opposed to simply evaluating for side effects).  
> 
> At the moment, nothing uses this flag in the public sources.  In ACT's
> code (in a change I will propose later), we have modified the 'call'
> command to use this flag, and our post-parser uses the void/non-void
> context distinction to disambiguate between overloaded procedures
> (void-returning functions) and value-returning functions.  This sort
> of limited, context-dependent disambiguation is not useful in C or
> C++, but is useful in Ada.  We do not implement Ada's full
> context-dependent type resolution; for the debugger, that simply turns
> out to be overkill.
> 
> This better?

Thanks; this is OK.

> 2004-03-04  Paul N. Hilfinger  <Hilfinger@gnat.com>
> 
> 	* language.h (language_defn): Add new la_post_parser field.
> 	* parser-defs.h (null_post_parser): New declaration (default for
> 	la_post_parser).
> 	
> 	* parse.c (parse_exp_1): Move code to parse_exp_in_context and
> 	insert call to that function.
> 	(parse_exp_in_context): New function, including code formerly in
> 	parse_exp_1.  Calls language-dependent post-parser after 
> 	prefixification.
> 	(parse_expression_in_context): New exported function.
> 	(null_post_parser): New definition.
> 	* expression.h (parse_expression_in_context): Add declaration.
> 	
> 	* p-lang.c (pascal_language_defn): Add trivial post-parser.
> 	* c-lang.c (c_language_defn): Ditto.
> 	(cplus_language_defn): Ditto.
> 	(asm_language_defn): Ditto.
> 	(minimal_language_defn): Ditto.
> 	* f-lang.c (f_language_defn): Ditto.
> 	* jv-lang.c (java_language_defn): Ditto.
> 	* language.c (unknown_language_defn): Ditto.
> 	(auto_language_defn): Ditto.
> 	(local_language_defn): Ditto.
> 	* m2-lang.c (m2_language_defn): Ditto.
> 	* scm-lang.c (scm_language_defn): Ditto.
> 	* obj-lang.c (objc_language_defn): Ditto.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer