TypeSpec
ASTternary_expression::typecheck (TypeSpec expected)
{
// FIXME - closures
TypeSpec c = typecheck_list (cond(), TypeDesc::TypeInt);
TypeSpec t = typecheck_list (trueexpr(), expected);
TypeSpec f = typecheck_list (falseexpr(), expected);
if (c.is_closure())
error ("Cannot use a closure as a condition");
if (c.is_structure())
error ("Cannot use a struct as a condition");
if (c.is_array())
error ("Cannot use an array as a condition");
// No arrays
if (t.is_array() || t.is_array()) {
error ("Not allowed: '%s ? %s : %s'",
type_c_str(c), type_c_str(t), type_c_str(f));
return TypeSpec ();
}
// The true and false clauses need to be equivalent types, or one
// needs to be assignable to the other (so one can be upcast).
if (assignable (t, f) || assignable (f, t))
m_typespec = higherprecision (t.simpletype(), f.simpletype());
else
error ("Not allowed: '%s ? %s : %s'",
type_c_str(c), type_c_str(t), type_c_str(f));
return m_typespec;
}
int asgn_op ( )
{
descriptor *src;
descriptor *dest;
int status;
src = pop ( );
dest = top ( );
src = deref (src);
if (!assignable (dest)) {
TypeError ("cannot assign to", NULL, dest, NULL, F_False);
RecycleData (src);
return 1;
}
dest = deref (dest);
src = CollapseMatrix (src);
status = AssignData (dest, &src);
RecycleData (src);
D_Temp (dest) = F_False;
return status;
}
void
ASTvariable_declaration::typecheck_initlist (ref init, TypeSpec type,
const char *name)
{
// Loop over a list of initializers (it's just 1 if not an array)...
for (int i = 0; init; init = init->next(), ++i) {
// Check for too many initializers for an array
if (type.is_array() && i > type.arraylength()) {
error ("Too many initializers for a '%s'", type_c_str(type));
break;
}
// Special case: ok to assign a literal 0 to a closure to
// initialize it.
if (type.is_closure() && ! init->typespec().is_closure() &&
init->typespec().is_int_or_float() &&
init->nodetype() == literal_node &&
((ASTliteral *)init.get())->floatval() == 0.0f) {
continue; // it's ok
}
if (! type.is_array() && i > 0)
error ("Can't assign array initializers to non-array %s %s",
type_c_str(type), name);
if (! assignable(type.elementtype(), init->typespec()))
error ("Can't assign '%s' to %s %s", type_c_str(init->typespec()),
type_c_str(type), name);
}
}
unsigned int RFSMasmt::isAssignable()
{
unsigned int lt = m_lValue->getType();
unsigned int rt = m_rValue->getType();
return assignable(lt,rt);
}
bool
ASTNode::check_arglist (const char *funcname, ASTNode::ref arg,
const char *formals, bool coerce)
{
// std::cerr << "ca " << funcname << " formals='" << formals << "\n";
for ( ; arg; arg = arg->next()) {
if (! *formals) // More formal args, but no more actual args
return false;
if (*formals == '*') // Will match anything left
return true;
if (*formals == '.') { // Special case for token/value pairs
// FIXME -- require that the tokens be string literals
if (arg->typespec().is_string() && arg->next() != NULL) {
arg = arg->next();
continue;
}
return false;
}
if (*formals == '?') {
if (formals[1] == '[' && formals[2] == ']') {
// Any array
formals += 3;
if (arg->typespec().is_array())
continue; // match
else return false; // wanted an array, didn't get one
}
if (arg->typespec().is_array())
return false; // wanted any scalar, got an array
formals += 1;
continue; // match anything
}
TypeSpec argtype = arg->typespec();
int advance;
TypeSpec formaltype = m_compiler->type_from_code (formals, &advance);
formals += advance;
// std::cerr << "\targ is " << argtype.string()
// << ", formal is " << formaltype.string() << "\n";
if (argtype == formaltype)
continue; // ok, move on to next arg
if (coerce && assignable (formaltype, argtype))
continue;
// Allow a fixed-length array match to a formal array with
// unspecified length, if the element types are the same.
if (formaltype.arraylength() < 0 && argtype.arraylength() &&
formaltype.elementtype() == argtype.elementtype())
continue;
// anything that gets this far we don't consider a match
return false;
}
if (*formals && *formals != '*' && *formals != '.')
return false; // Non-*, non-... formals expected, no more actuals
return true; // Is this safe?
}
void SemanticsVisitor::visit(AssigningNode& assign) {
LHSSemanticsVisitor lhsVisitor(¤tSymbolTable(), errorLog());
assign.getTargetName()->accept(lhsVisitor);
assign.getValueExpr()->accept(*this);
if ( assignable( assign.getTargetName()->getType(), assign.getValueExpr()->getType() ) ) {
assign.setType( assign.getTargetName()->getType() );
} else {
errorLog() << "Right hand side expression not assignable to left hand side name at " << &assign << "\n";
assign.setType(0); // NOTICE by design, null attribute and error type is 0.
}
}
TypeSpec
ASTvariable_declaration::typecheck_struct_initializers (ref init)
{
ASSERT (m_typespec.is_structure());
if (! init->next() && init->typespec() == m_typespec) {
// Special case: just one initializer, it's a whole struct of
// the right type.
return m_typespec;
}
// General case -- per-field initializers
const StructSpec *structspec (m_typespec.structspec());
int numfields = (int)structspec->numfields();
for (int i = 0; init; init = init->next(), ++i) {
if (i >= numfields) {
error ("Too many initializers for '%s %s'",
type_c_str(m_typespec), m_name.c_str());
break;
}
const StructSpec::FieldSpec &field (structspec->field(i));
if (init->nodetype() == compound_initializer_node) {
// Initializer is itself a compound, it ought to be initializing
// a field that is an array.
if (field.type.is_array ()) {
ustring fieldname = ustring::format ("%s.%s", m_sym->name().c_str(),
field.name.c_str());
typecheck_initlist (((ASTcompound_initializer *)init.get())->initlist(),
field.type, fieldname.c_str());
} else {
error ("Can't use '{...}' for a struct field that is not an array");
}
continue;
}
// Ok to assign a literal 0 to a closure to initialize it.
if (field.type.is_closure() && ! init->typespec().is_closure() &&
(init->typespec().is_float() || init->typespec().is_int()) &&
init->nodetype() == literal_node &&
((ASTliteral *)init.get())->floatval() == 0.0f) {
continue; // it's ok
}
// Normal initializer, normal field.
if (! assignable(field.type, init->typespec()))
error ("Can't assign '%s' to '%s %s.%s'",
type_c_str(init->typespec()),
type_c_str(field.type), m_name.c_str(), field.name.c_str());
}
return m_typespec;
}
TypeSpec
ASTtypecast_expression::typecheck (TypeSpec expected)
{
// FIXME - closures
typecheck_children (m_typespec);
TypeSpec t = expr()->typespec();
if (! assignable (m_typespec, t) &&
! (m_typespec.is_int() && t.is_float()) && // (int)float is ok
! (m_typespec.is_triple() && t.is_triple()))
error ("Cannot cast '%s' to '%s'", type_c_str(t),
type_c_str(m_typespec));
return m_typespec;
}
TypeSpec
ASTassign_expression::typecheck (TypeSpec expected)
{
TypeSpec vt = var()->typecheck ();
TypeSpec et = expr()->typecheck (vt);
if (! var()->is_lvalue()) {
error ("Can't assign via %s to something that isn't an lvalue", opname());
return TypeSpec();
}
ASSERT (m_op == Assign); // all else handled by binary_op
// We don't currently support assignment of whole arrays
if (vt.is_array() || et.is_array()) {
error ("Can't assign entire arrays");
return TypeSpec();
}
// Special case: ok to assign a literal 0 to a closure to
// initialize it.
if (vt.is_closure() && ! et.is_closure() &&
(et.is_float() || et.is_int()) &&
expr()->nodetype() == literal_node &&
((ASTliteral *)&(*expr()))->floatval() == 0.0f) {
return TypeSpec(); // it's ok
}
// If either argument is a structure, they better both be the same
// exact kind of structure.
if (vt.is_structure() || et.is_structure()) {
int vts = vt.structure(), ets = et.structure();
if (vts == ets)
return m_typespec = vt;
// Otherwise, a structure mismatch
error ("Cannot assign '%s' to '%s'", type_c_str(et), type_c_str(vt));
return TypeSpec();
}
// Expression must be of a type assignable to the lvalue
if (! assignable (vt, et)) {
error ("Cannot assign '%s' to '%s'", type_c_str(et), type_c_str(vt));
// FIXME - can we print the variable in question?
return TypeSpec();
}
return m_typespec = vt;
}
void SemanticsVisitor::visit(ReturningNode& rn) {
if (rn.getReturnVal() != 0) { // NOTICE use errorType
rn.getReturnVal()->accept(*this); // the same as visitChildren
if (getCurrentFunction() == 0)
errorLog() << "Return statement can only appear in a function.\n";
else {
if(!assignable(getCurrentFunction()->getReturnType()->getType(),
rn.getReturnVal()->getType())) {
errorLog() << "Illigal return type.\n";
}
}
} else if (getCurrentFunction() != 0 &&
!dynamic_cast<VoidTypeDescriptor*>(getCurrentFunction()->getReturnType()->getType()) // return type =/= void
) {
errorLog() << "A value must be returned.\n";
}
}
expected<strong_actor_ptr>
actor_system::dyn_spawn_impl(const std::string& name, message& args,
execution_unit* ctx, bool check_interface,
optional<const mpi&> expected_ifs) {
CAF_LOG_TRACE(CAF_ARG(name) << CAF_ARG(args) << CAF_ARG(check_interface)
<< CAF_ARG(expected_ifs));
if (name.empty())
return sec::invalid_argument;
auto& fs = cfg_.actor_factories;
auto i = fs.find(name);
if (i == fs.end())
return sec::unknown_type;
actor_config cfg{ctx ? ctx : &dummy_execution_unit_};
auto res = i->second(cfg, args);
if (!res.first)
return sec::cannot_spawn_actor_from_arguments;
if (check_interface && !assignable(res.second, *expected_ifs))
return sec::unexpected_actor_messaging_interface;
return std::move(res.first);
}
TypeSpec
ASTreturn_statement::typecheck (TypeSpec expected)
{
FunctionSymbol *myfunc = oslcompiler->current_function ();
if (myfunc) {
// If it's a user function (as opposed to a main shader body)...
if (expr()) {
// If we are returning a value, it must be assignable to the
// kind of type the function actually returns. This check
// will also catch returning a value from a void function.
TypeSpec et = expr()->typecheck (myfunc->typespec());
if (! assignable (myfunc->typespec(), et)) {
error ("Cannot return a '%s' from '%s %s()'",
type_c_str(et), type_c_str(myfunc->typespec()),
myfunc->name().c_str());
}
} else {
// If we are not returning a value, it must be a void function.
if (! myfunc->typespec().is_void ())
error ("You must return a '%s' from function '%s'",
type_c_str(myfunc->typespec()),
myfunc->name().c_str());
}
// If the function has other statements AFTER 'return', or if
// the return statement is in a conditional, we'll need to
// handle it specially when generating code.
myfunc->complex_return (this->nextptr() != NULL ||
myfunc->nesting_level() > 0);
} else {
// We're not part of any user function, so this 'return' must
// be from the main shader body. That's fine (it's equivalent
// to calling exit()), but it can't return a value.
if (expr())
error ("Cannot return a value from a shader body");
}
return TypeSpec(); // TODO: what should be returned here?
}
bool SemanticsVisitor::bindable(TypeDescriptor *dest, TypeDescriptor *src) {
return assignable(dest, src); // TODO check array type
}
int gen_op ( )
{
Matrix a;
Matrix b;
void *ptr;
descriptor *d;
descriptor *v;
descriptor *var;
descriptor *index;
descriptor *vector;
descriptor temp;
double value;
Address increment;
Array arr;
int fail;
unsigned offset;
unsigned i;
unsigned c;
unsigned r;
index = ntop (0);
vector = ntop (1);
var = ntop (2);
offset = fetch (pc ++).ival;
if (D_Type (index) == T_Double) {
if (!assignable (var)) {
TypeError ("cannot assign to", NULL, var, NULL, F_False);
return 1;
}
d = &temp;
D_Type (d) = T_Null;
D_Temp (d) = F_False;
D_Trapped (d) = F_False;
D_Pointer (d) = NULL;
v = CoerceData (vector, T_Double);
AssignData (d, &v);
RecycleData (v);
D_Temp (d) = F_False;
d_printf ("d = %s %p\n", D_TypeName (d), D_Pointer (d));
switch (D_Type (d)) {
case T_Double:
case T_Matrix:
case T_Array:
case T_Null:
break;
default:
TypeError ("cannot index", NULL, d, NULL, F_False);
return 1;
}
*vector = *d;
D_Type (index) = T_Row;
D_Row (index) = 0;
}
d_printf ("vector = %s %p\n", D_TypeName (vector), D_Pointer (vector));
var = deref (var);
fail = F_False;
switch (D_Type (vector)) {
case T_Double:
if (D_Row (index) ++ == 0)
AssignData (var, &vector);
else
fail = F_True;
break;
case T_Matrix:
a = D_Matrix (vector);
d = &temp;
D_Temp (d) = F_False;
D_Trapped (d) = F_False;
if (Mrows (a) == 1) {
if (++ D_Row (index) <= Mcols (a)) {
D_Type (d) = T_Double;
D_Double (d) = &value;
value = mdata (a, 1, D_Row (index));
AssignData (var, &d);
} else
fail = F_True;
} else if (Mcols (a) == 1) {
if (++ D_Row (index) <= Mrows (a)) {
D_Type (d) = T_Double;
D_Double (d) = &value;
value = mdata (a, D_Row (index), 1);
AssignData (var, &d);
} else
fail = F_True;
} else {
if (++ D_Row (index) <= Mcols (a)) {
d_printf ("indexing matrix\n");
r = Mrows (a);
c = D_Row (index);
FreeData (var);
CreateData (var, NULL, NULL, T_Matrix, r, 1);
D_Temp (var) = F_False;
b = D_Matrix (var);
for (i = 1; i <= r; i ++)
sdata (b, i, 1) = mdata (a, i, c);
} else
fail = F_True;
}
break;
case T_Array:
arr = D_Array (vector);
d = &temp;
if (++ D_Row (index) <= arr -> length) {
increment = D_Row (index) * arr -> elt_size;
ptr = (void *) ((char *) arr -> ptr + increment);
D_Type (d) = arr -> type;
D_Temp (d) = F_False;
D_Trapped (d) = F_False;
D_Pointer (d) = ptr;
AssignData (var, &d);
} else
fail = F_True;
break;
case T_Null:
fail = F_True;
break;
}
/* After assignment the variable is certainly not temporary. Its trapped
status remains as before: if it was trapped then AssignData() called
the trap handler which didn't change the status. If it wasn't then
AssignData() left the status alone. */
D_Temp (var) = F_False;
if (fail == F_True) {
pop ( );
FreeData (pop ( )); /* free the privately owned vector */
pop ( );
d = push ( );
D_Type (d) = T_Null;
D_Temp (d) = F_False;
D_Trapped (d) = F_False;
D_Pointer (d) = NULL;
pc += offset;
d_printf ("failing\n");
}
return 0;
}
bool assignable(const std::set<std::string>& xs) const {
return assignable(xs, message_types<T>());
}