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/*
* Copyright (c) 2002-2006 The TenDRA Project <http://www.tendra.org/>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of The TenDRA Project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific, prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id$
*/
/*
Crown Copyright (c) 1997
This TenDRA(r) Computer Program is subject to Copyright
owned by the United Kingdom Secretary of State for Defence
acting through the Defence Evaluation and Research Agency
(DERA). It is made available to Recipients with a
royalty-free licence for its use, reproduction, transfer
to other parties and amendment for any purpose not excluding
product development provided that any such use et cetera
shall be deemed to be acceptance of the following conditions:-
(1) Its Recipients shall ensure that this Notice is
reproduced upon any copies or amended versions of it;
(2) Any amended version of it shall be clearly marked to
show both the nature of and the organisation responsible
for the relevant amendment or amendments;
(3) Its onward transfer from a recipient to another
party shall be deemed to be that party's acceptance of
these conditions;
(4) DERA gives no warranty or assurance as to its
quality or suitability for any purpose and DERA accepts
no liability whatsoever in relation to any use to which
it may be put.
*/
#include "config.h"
#include "c_types.h"
#include "ctype_ops.h"
#include "exp_ops.h"
#include "id_ops.h"
#include "nspace_ops.h"
#include "tok_ops.h"
#include "type_ops.h"
#include "error.h"
#include "catalog.h"
#include "access.h"
#include "basetype.h"
#include "class.h"
#include "declare.h"
#include "file.h"
#include "function.h"
#include "initialise.h"
#include "macro.h"
#include "namespace.h"
#include "parse.h"
#include "predict.h"
#include "rewrite.h"
#include "statement.h"
#include "syntax.h"
/*
COUNT OF NUMBER OF SKIPPED FUNCTIONS
This value is used to keep track of the number of functions skipped
and subsequently compiled.
*/
static int functions_pending = 0;
/*
SKIP A FUNCTION DEFINITION
This routine skips the function definition for the function id given by
the current sequence of lexical tokens. Note that last_lex_token is
set to lex_func_Hop to indicate that a function definition has been
skipped.
*/
void
skip_function(IDENTIFIER id)
{
EXP e;
LOCATION loc;
int t = crt_lex_token;
PPTOKEN *p = crt_token;
PPTOKEN *q = p;
int brackets = 0;
int try_block = 0;
/* Check for previous definition */
if (!IS_NULL_id(id)) {
PTR(LOCATION)ploc = id_loc(id);
COPY_loc(ploc, decl_loc);
e = DEREF_exp(id_function_etc_defn(id));
if (!IS_NULL_exp(e)) {
/* Function already defined */
report(crt_loc, ERR_basic_odr_def_func(id, ploc));
}
}
/* Skip definition */
loc = crt_loc;
if (t == lex_try) {
try_block = 1;
}
for (;;) {
if (t == lex_open_Hbrace_H1 || t == lex_open_Hbrace_H2) {
/* Start of block */
brackets++;
} else if (t == lex_close_Hbrace_H1 ||
t == lex_close_Hbrace_H2) {
/* End of block */
brackets--;
if (brackets <= 0) {
q = crt_token;
t = expand_preproc(EXPAND_AHEAD);
if (t != lex_catch || !try_block) {
/* End of function */
break;
}
}
} else if (t == lex_semicolon && brackets == 0) {
/* Premature end of function */
break;
} else if (t == lex_eof) {
/* Premature end of file */
report(loc, ERR_class_mfct_eof(id));
crt_lex_token = t;
return;
}
q = crt_token;
t = expand_preproc(EXPAND_AHEAD);
}
last_lex_token = lex_func_Hop;
crt_lex_token = t;
snip_tokens(p, q);
/* Create the definition */
MAKE_exp_uncompiled(type_void, loc, p, e);
if (!IS_NULL_id(id)) {
COPY_exp(id_function_etc_defn(id), e);
functions_pending++;
}
return;
}
/*
SKIP A DEFAULT ARGUMENT VALUE
This routine skips the default argument value for the function parameter
id given by the current sequence of lexical tokens. It returns an
expression giving the skipped value which is associated with id by
init_param.
*/
EXP
skip_default_arg(IDENTIFIER id)
{
EXP e;
LOCATION loc;
int brackets = 0;
int t = crt_lex_token;
PPTOKEN *p = crt_token;
PPTOKEN *q = p;
/* Skip definition */
loc = crt_loc;
for (;;) {
if (t == lex_open_Hround || t == lex_open_Htemplate) {
brackets++;
} else if (t == lex_close_Hround || t == lex_close_Htemplate) {
if (brackets == 0) {
break;
}
brackets--;
} else if (t == lex_comma) {
if (brackets == 0) {
break;
}
} else if (t == lex_eof) {
/* Premature end of file */
report(loc, ERR_class_mfct_eof(id));
crt_lex_token = t;
return (NULL_exp);
}
q = crt_token;
t = expand_preproc(EXPAND_AHEAD);
}
crt_lex_token = t;
snip_tokens(p, q);
/* Create the definition */
MAKE_exp_uncompiled(type_error, loc, p, e);
functions_pending++;
return (e);
}
/*
BRING A SET OF TEMPLATE ARGUMENTS INTO SCOPE
When rescanning a template member function it is necessary to bring
the template parameters back into scope. This routine performs this
operation for the template type t. It returns the non-template
component of t.
*/
TYPE
begin_templ_scope(TYPE t)
{
if (!IS_NULL_type(t) && IS_type_templ(t)) {
TYPE s = DEREF_type(type_templ_defn(t));
TOKEN sort = DEREF_tok(type_templ_sort(t));
NAMESPACE ns = DEREF_nspace(tok_templ_pars(sort));
if (!IS_NULL_nspace(ns)) {
record_location++;
in_template_decl++;
add_namespace(ns);
}
t = begin_templ_scope(s);
}
return (t);
}
/*
TAKE A SET OF TEMPLATE ARGUMENTS OUT OF SCOPE
This routine removes any template parameters brought into scope by
begin_templ_scope.
*/
void
end_templ_scope(TYPE t)
{
if (!IS_NULL_type(t) && IS_type_templ(t)) {
TYPE s = DEREF_type(type_templ_defn(t));
TOKEN sort = DEREF_tok(type_templ_sort(t));
NAMESPACE ns = DEREF_nspace(tok_templ_pars(sort));
end_templ_scope(s);
if (!IS_NULL_nspace(ns)) {
remove_namespace();
in_template_decl--;
record_location--;
}
}
return;
}
/*
COMPILE A FUNCTION DEFINITION
This routine compiles any previously skipped definition for the
function id.
*/
static void
rescan_function(IDENTIFIER id)
{
EXP e = DEREF_exp(id_function_etc_defn(id));
if (!IS_NULL_exp(e) && IS_exp_uncompiled(e)) {
PPTOKEN *p;
PARSE_STATE s;
TYPE fn = DEREF_type(id_function_etc_type(id));
/* Mark function as inline */
DECL_SPEC ds = DEREF_dspec(id_storage(id));
ds |= dspec_inline;
COPY_dspec(id_storage(id), ds);
/* Save current compiler state */
save_state(&s, 1);
/* Set parser to stored definition */
DEREF_loc(exp_uncompiled_start(e), crt_loc);
crt_line_changed = 1;
crt_file_changed = 1;
p = DEREF_pptok(exp_uncompiled_defn(e));
init_parser(p);
/* Start function definition */
in_class_defn = 0;
in_function_defn++;
really_in_function_defn++;
COPY_exp(id_function_etc_defn(id), NULL_exp);
DEREF_loc(id_loc(id), decl_loc);
IGNORE begin_templ_scope(fn);
begin_function(id);
/* Parse the stored function definition */
ADVANCE_LEXER;
parse_func(&e);
if (crt_lex_token != lex_eof && !have_syntax_error) {
ERROR err = ERR_lex_parse(crt_token);
report(crt_loc, err);
unreached_code = 1;
}
/* End the function definition */
IGNORE end_function(id, e);
end_templ_scope(fn);
/* Reset the parser */
restore_state(&s);
p = restore_parser();
free_tok_list(p);
functions_pending--;
}
return;
}
/*
COMPILE A DEFAULT ARGUMENT VALUE
This routine compiles any previously skipped default argument value
for the parameter id.
*/
void
rescan_param(IDENTIFIER id, int rescan)
{
EXP e = DEREF_exp(id_parameter_init(id));
if (!IS_NULL_exp(e) && IS_exp_uncompiled(e)) {
PPTOKEN *p;
PARSE_STATE s;
TYPE fn = NULL_type;
NAMESPACE ns = DEREF_nspace(id_parent(id));
IDENTIFIER pid = DEREF_id(nspace_name(ns));
if (!IS_NULL_id(pid) && IS_id_function_etc(pid)) {
fn = DEREF_type(id_function_etc_type(pid));
} else {
CLASS_TYPE ct = crt_class;
if (!IS_NULL_ctype(ct)) {
pid = DEREF_id(ctype_name(ct));
} else {
pid = NULL_id;
}
}
/* Save current compiler state */
save_state(&s, 1);
/* Set parser to stored definition */
DEREF_loc(exp_uncompiled_start(e), crt_loc);
crt_line_changed = 1;
crt_file_changed = 1;
p = DEREF_pptok(exp_uncompiled_defn(e));
init_parser(p);
/* Start dafault argument value */
in_class_defn = 0;
COPY_exp(id_parameter_init(id), NULL_exp);
if (rescan) {
IGNORE begin_templ_scope(fn);
push_namespace(ns);
}
/* Parse the stored expression */
ADVANCE_LEXER;
in_default_arg++;
parse_exp(&e);
in_default_arg--;
if (crt_lex_token != lex_eof && !have_syntax_error) {
ERROR err = ERR_lex_parse(crt_token);
report(crt_loc, err);
}
/* End the default argument value */
init_param(id, e);
if (rescan) {
IGNORE pop_namespace();
end_templ_scope(fn);
}
/* Reset the parser */
if (crt_access_list.pending) {
IGNORE report_access(pid);
}
restore_state(&s);
p = restore_parser();
free_tok_list(p);
functions_pending--;
}
return;
}
/*
COMPILE ALL FUNCTIONS IN A NAMESPACE
This routine scans through the current class and any nested classes
compiling any function definitions which remain uncompiled.
*/
void
rescan_functions(void)
{
CLASS_TYPE ct = crt_class;
LIST(IDENTIFIER) ft = DEREF_list(ctype_nest(ct));
while (!IS_NULL_list(ft)) {
IDENTIFIER id = DEREF_id(HEAD_list(ft));
switch (TAG_id(id)) {
case id_class_name_tag: {
/* Deal with nested classes */
CLASS_TYPE cs;
CLASS_INFO ci;
NAMESPACE cns;
TYPE t = DEREF_type(id_class_name_defn(id));
TYPE s = begin_templ_scope(t);
cs = DEREF_ctype(type_compound_defn(s));
ci = DEREF_cinfo(ctype_info(cs));
if (ci & cinfo_complete) {
cns = DEREF_nspace(ctype_member(cs));
push_class(cs);
push_namespace(cns);
rescan_functions();
IGNORE pop_namespace();
pop_class();
}
end_templ_scope(t);
break;
}
case id_function_tag:
case id_mem_func_tag:
case id_stat_mem_func_tag:
/* Deal with inline functions (including friends) */
rescan_function(id);
break;
case id_parameter_tag:
/* Deal with default arguments */
rescan_param(id, 1);
break;
}
ft = TAIL_list(ft);
}
return;
}