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Commit 2df677d2 authored by Alexandre Duret-Lutz's avatar Alexandre Duret-Lutz
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parsetl: factor some code 

* spot/parsetl/parsetl.yy (parse_ap, sere_ensure_bool,
error_false_block): New functions, replacing several similar blocks.
parent 93b9932f
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spot/parsetl/parsetl.yy
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/* -*- coding: utf-8 -*-
** Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Laboratoire
** de Recherche et Développement de l'Epita (LRDE).
** Copyright (C) 2003, 2004, 2005, 2006 Laboratoire d'Informatique de
** Paris 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
** Université Pierre et Marie Curie.
** Copyright (C) 2009-2017 Laboratoire de Recherche et Développement
** de l'Epita (LRDE).
** Copyright (C) 2003-2006 Laboratoire d'Informatique de Paris 6
** (LIP6), département Systèmes Répartis Coopératifs (SRC), Université
** Pierre et Marie Curie.
**
** This file is part of Spot, a model checking library.
**
......@@ -89,9 +90,52 @@ using namespace spot;
} \
while (0);
static bool
sere_ensure_bool(const fnode* f, const spot::location& loc,
const char* oper, spot::parse_error_list& error_list)
{
if (f->is_boolean())
return true;
std::string s;
s.reserve(80);
s = "not a Boolean expression: in a SERE ";
s += oper;
s += " can only be applied to a Boolean expression";
error_list.emplace_back(loc, s);
return false;
}
static const fnode*
error_false_block(const spot::location& loc,
spot::parse_error_list& error_list)
{
error_list.emplace_back(loc, "treating this block as false");
return fnode::ff();
}
static const fnode*
parse_ap(const std::string& str,
const spot::location& location,
spot::environment& env,
spot::parse_error_list& error_list)
{
auto res = env.require(str);
if (!res)
{
std::string s;
s.reserve(64);
s = "unknown atomic proposition `";
s += str;
s += "' in ";
s += env.name();
error_list.emplace_back(location, s);
}
return res.to_node_();
}
enum parser_type { parser_ltl, parser_bool, parser_sere };
static formula
static const fnode*
try_recursive_parse(const std::string& str,
const spot::location& location,
spot::environment& env,
......@@ -135,20 +179,10 @@ using namespace spot;
}
if (pf.errors.empty())
return pf.f;
auto f = env.require(str);
if (!f)
{
std::string s = "atomic proposition `";
s += str;
s += "' rejected by environment `";
s += env.name();
s += "'";
error_list.emplace_back(location, s);
}
return f;
return pf.f.to_node_();
return parse_ap(str, location, env, error_list);
}
}
......@@ -228,7 +262,7 @@ using namespace spot;
need any precedence). */
%nonassoc OP_NOT
%type <ltl> subformula booleanatom sere lbtformula boolformula
%type <ltl> subformula atomprop booleanatom sere lbtformula boolformula
%type <ltl> bracedsere parenthesedsubformula
%type <minmax> starargs fstarargs equalargs sqbracketargs gotoargs
......@@ -401,57 +435,19 @@ equalargs: OP_EQUAL_OPEN sqbracketargs
$$.min = $$.max = 0U; }
booleanatom: ATOMIC_PROP
{
$$ = parse_environment.require(*$1).to_node_();
if (! $$)
{
std::string s = "unknown atomic proposition `";
s += *$1;
s += "' in environment `";
s += parse_environment.name();
s += "'";
error_list.emplace_back(@1, s);
delete $1;
YYERROR;
}
else
delete $1;
}
| ATOMIC_PROP OP_POST_POS
{
$$ = parse_environment.require(*$1).to_node_();
if (! $$)
{
std::string s = "unknown atomic proposition `";
s += *$1;
s += "' in environment `";
s += parse_environment.name();
s += "'";
error_list.emplace_back(@1, s);
delete $1;
YYERROR;
}
else
delete $1;
}
| ATOMIC_PROP OP_POST_NEG
atomprop: ATOMIC_PROP
{
$$ = parse_ap(*$1, @1, parse_environment, error_list);
delete $1;
if (!$$)
YYERROR;
}
booleanatom: atomprop
| atomprop OP_POST_POS
| atomprop OP_POST_NEG
{
$$ = parse_environment.require(*$1).to_node_();
if (! $$)
{
std::string s = "unknown atomic proposition `";
s += *$1;
s += "' in environment `";
s += parse_environment.name();
s += "'";
error_list.emplace_back(@1, s);
delete $1;
YYERROR;
}
else
delete $1;
$$ = fnode::unop(op::Not, $$);
$$ = fnode::unop(op::Not, $1);
}
| CONST_TRUE
{ $$ = fnode::tt(); }
......@@ -461,18 +457,14 @@ booleanatom: ATOMIC_PROP
sere: booleanatom
| OP_NOT sere
{
if ($2->is_boolean())
if (sere_ensure_bool($2, @2, "`!'", error_list))
{
$$ = fnode::unop(op::Not, $2);
}
else
{
error_list.emplace_back(@2,
"not a boolean expression: inside a SERE `!' can only "
"be applied to a Boolean expression");
error_list.emplace_back(@$, "treating this block as false");
$2->destroy();
$$ = fnode::ff();
$$ = error_false_block(@$, error_list);
}
}
| bracedsere
......@@ -480,8 +472,7 @@ sere: booleanatom
{
$$ =
try_recursive_parse(*$1, @1, parse_environment,
debug_level(), parser_sere, error_list)
.to_node_();
debug_level(), parser_sere, error_list);
delete $1;
if (!$$)
YYERROR;
......@@ -560,20 +551,15 @@ sere: booleanatom
error_list.emplace_back(@2, "reversed range");
std::swap($2.max, $2.min);
}
if ($1->is_boolean())
if (sere_ensure_bool($1, @1, "[=...]", error_list))
{
$$ = formula::sugar_equal(formula($1),
$2.min, $2.max).to_node_();
}
else
{
error_list.emplace_back(@1,
"not a boolean expression: [=...] can only "
"be applied to a Boolean expression");
error_list.emplace_back(@$,
"treating this block as false");
$1->destroy();
$$ = fnode::ff();
$$ = error_false_block(@$, error_list);
}
}
| sere gotoargs
......@@ -583,96 +569,60 @@ sere: booleanatom
error_list.emplace_back(@2, "reversed range");
std::swap($2.max, $2.min);
}
if ($1->is_boolean())
if (sere_ensure_bool($1, @1, "[->...]", error_list))
{
$$ = formula::sugar_goto(formula($1),
$2.min, $2.max).to_node_();
}
else
{
error_list.emplace_back(@1,
"not a boolean expression: [->...] can only "
"be applied to a Boolean expression");
error_list.emplace_back(@$,
"treating this block as false");
$1->destroy();
$$ = fnode::ff();
$$ = error_false_block(@$, error_list);
}
}
| sere OP_XOR sere
{
if ($1->is_boolean() && $3->is_boolean())
if (sere_ensure_bool($1, @1, "`^'", error_list)
&& sere_ensure_bool($3, @3, "`^'", error_list))
{
$$ = fnode::binop(op::Xor, $1, $3);
}
else
{
if (!$1->is_boolean())
{
error_list.emplace_back(@1,
"not a boolean expression: inside SERE `<->' can only "
"be applied to Boolean expressions");
}
if (!$3->is_boolean())
{
error_list.emplace_back(@3,
"not a boolean expression: inside SERE `<->' can only "
"be applied to Boolean expressions");
}
error_list.emplace_back(@$, "treating this block as false");
$1->destroy();
$3->destroy();
$$ = fnode::ff();
$$ = error_false_block(@$, error_list);
}
}
| sere OP_XOR error
{ missing_right_binop($$, $1, @2, "xor operator"); }
| sere OP_IMPLIES sere
{
if ($1->is_boolean())
if (sere_ensure_bool($1, @1, "`->'", error_list))
{
$$ = fnode::binop(op::Implies, $1, $3);
}
else
{
if (!$1->is_boolean())
{
error_list.emplace_back(@1,
"not a boolean expression: inside SERE `->' can only "
"be applied to a Boolean expression");
}
error_list.emplace_back(@$, "treating this block as false");
$1->destroy();
$3->destroy();
$$ = fnode::ff();
$$ = error_false_block(@$, error_list);
}
}
| sere OP_IMPLIES error
{ missing_right_binop($$, $1, @2, "implication operator"); }
| sere OP_EQUIV sere
{
if ($1->is_boolean() && $3->is_boolean())
if (sere_ensure_bool($1, @1, "`<->'", error_list)
&& sere_ensure_bool($3, @3, "`<->'", error_list))
{
$$ = fnode::binop(op::Equiv, $1, $3);
}
else
{
if (!$1->is_boolean())
{
error_list.emplace_back(@1,
"not a boolean expression: inside SERE `<->' can only "
"be applied to Boolean expressions");
}
if (!$3->is_boolean())
{
error_list.emplace_back(@3,
"not a boolean expression: inside SERE `<->' can only "
"be applied to Boolean expressions");
}
error_list.emplace_back(@$, "treating this block as false");
$1->destroy();
$3->destroy();
$$ = fnode::ff();
$$ = error_false_block(@$, error_list);
}
}
| sere OP_EQUIV error
......@@ -709,7 +659,7 @@ bracedsere: BRACE_OPEN sere BRACE_CLOSE
{
$$ = try_recursive_parse(*$1, @1, parse_environment,
debug_level(),
parser_sere, error_list).to_node_();
parser_sere, error_list);
delete $1;
if (!$$)
YYERROR;
......@@ -718,8 +668,7 @@ bracedsere: BRACE_OPEN sere BRACE_CLOSE
parenthesedsubformula: PAR_BLOCK
{
$$ = try_recursive_parse(*$1, @1, parse_environment,
debug_level(), parser_ltl, error_list)
.to_node_();
debug_level(), parser_ltl, error_list);
delete $1;
if (!$$)
YYERROR;
......@@ -756,8 +705,8 @@ boolformula: booleanatom
| PAR_BLOCK
{
$$ = try_recursive_parse(*$1, @1, parse_environment,
debug_level(), parser_bool, error_list)
.to_node_();
debug_level(),
parser_bool, error_list);
delete $1;
if (!$$)
YYERROR;
......@@ -923,31 +872,15 @@ subformula: booleanatom
| BRA_BANG_BLOCK
{
$$ = try_recursive_parse(*$1, @1, parse_environment,
debug_level(), parser_sere, error_list)
.to_node_();
debug_level(),
parser_sere, error_list);
delete $1;
if (!$$)
YYERROR;
$$ = fnode::binop(op::EConcat, $$, fnode::tt());
}
lbtformula: ATOMIC_PROP
{
$$ = parse_environment.require(*$1).to_node_();
if (! $$)
{
std::string s = "atomic proposition `";
s += *$1;
s += "' rejected by environment `";
s += parse_environment.name();
s += "'";
error_list.emplace_back(@1, s);
delete $1;
YYERROR;
}
else
delete $1;
}
lbtformula: atomprop
| '!' lbtformula
{ $$ = fnode::unop(op::Not, $2); }
| '&' lbtformula lbtformula
......
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