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Only warn about declaration after use once for each data object.

This commit is contained in:
Martin Whitaker 2026-03-21 18:14:01 +00:00
parent 475f098cab
commit 29e128ed94
3 changed files with 20 additions and 5 deletions
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10
net_scope.cc
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2000-2025 Stephen Williams (steve@icarus.com)
* Copyright (c) 2000-2026 Stephen Williams (steve@icarus.com)
* Copyright (c) 2016 CERN Michele Castellana (michele.castellana@cern.ch)
*
* This source code is free software; you can redistribute it
@ -462,6 +462,14 @@ unsigned NetScope::get_parameter_lexical_pos(perm_string key) const
return 0;
}
void NetScope::set_parameter_lexical_pos(perm_string key, unsigned lexical_pos)
{
map<perm_string,param_expr_t>::iterator idx;
idx = parameters.find(key);
if (idx != parameters.end()) idx->second.lexical_pos = lexical_pos;
}
void NetScope::print_type(ostream&stream) const
{
switch (type_) {

1
netlist.h
View File

@ -1274,6 +1274,7 @@ class NetScope : public Definitions, public Attrib {
LineInfo get_parameter_line_info(perm_string name) const;
unsigned get_parameter_lexical_pos(perm_string name) const;
void set_parameter_lexical_pos(perm_string name, unsigned lexical_pos);
/* Module instance arrays are collected here for access during
the multiple elaboration passes. */

14
symbol_search.cc
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2003-2024 Stephen Williams (steve@icarus.com)
* Copyright (c) 2003-2026 Stephen Williams (steve@icarus.com)
* Copyright CERN 2012 / Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
@ -175,6 +175,8 @@ bool symbol_search(const LineInfo*li, Design*des, NetScope*scope,
cerr << li->get_fileline()
<< ": warning: net `" << path_tail.name
<< "` used before declaration." << endl;
// suppress further warnings for this net
net->lexical_pos(lexical_pos);
}
return true;
} else if (!res->decl_after_use) {
@ -193,6 +195,8 @@ bool symbol_search(const LineInfo*li, Design*des, NetScope*scope,
cerr << li->get_fileline()
<< ": warning: event `" << path_tail.name
<< "` used before declaration." << endl;
// suppress further warnings for this event
eve->lexical_pos(lexical_pos);
}
return true;
} else if (!res->decl_after_use) {
@ -209,9 +213,11 @@ bool symbol_search(const LineInfo*li, Design*des, NetScope*scope,
res->par_val = par;
res->path_head = path;
if (warn_decl_after_use && decl_after_use) {
cerr << li->get_fileline()
<< ": warning: parameter `" << path_tail.name
<< "` used before declaration." << endl;
cerr << li->get_fileline()
<< ": warning: parameter `" << path_tail.name
<< "` used before declaration." << endl;
// suppress further warnings for this parameter
scope->set_parameter_lexical_pos(path_tail.name, lexical_pos);
}
return true;
} else if (!res->decl_after_use) {