static bool method_chain(pass_opt_t* opt, ast_t* ast)
{
if(!method_application(opt, ast, false))
return false;
// We check the receiver cap now instead of in method_application because
// we need to know whether the receiver was recovered.
ast_t* lhs = ast_childidx(ast, 2);
ast_t* r_type = method_receiver_type(lhs);
if(ast_id(lhs) == TK_FUNCHAIN)
{
bool recovered;
if(!check_receiver_cap(opt, ast, &recovered))
return false;
if(!check_nonsendable_recover(opt, ast))
return false;
ast_t* f_type = ast_type(lhs);
token_id f_cap = ast_id(ast_child(f_type));
ast_t* c_type = chain_type(r_type, f_cap, recovered);
ast_settype(ast, c_type);
} else {
ast_settype(ast, r_type);
}
return true;
}
static bool method_application(pass_opt_t* opt, ast_t* ast, bool partial)
{
AST_GET_CHILDREN(ast, positional, namedargs, question, lhs);
if(!method_check_type_params(opt, &lhs))
return false;
ast_t* type = ast_type(lhs);
if(is_typecheck_error(type))
return false;
AST_GET_CHILDREN(type, cap, typeparams, params, result);
if(!extend_positional_args(opt, params, positional))
return false;
if(!apply_named_args(opt, params, positional, namedargs))
return false;
if(!check_arg_types(opt, params, positional, partial))
return false;
switch(ast_id(lhs))
{
case TK_FUNREF:
case TK_FUNAPP:
if(ast_id(ast_child(type)) != TK_AT)
{
if(!check_receiver_cap(opt, ast, NULL))
return false;
if(!check_nonsendable_recover(opt, ast))
return false;
} else {
ast_t* receiver = ast_child(lhs);
// Dig through function qualification.
if((ast_id(receiver) == TK_FUNREF) || (ast_id(receiver) == TK_FUNAPP) ||
(ast_id(receiver) == TK_FUNCHAIN))
receiver = ast_child(receiver);
ast_t* recv_type = ast_type(receiver);
if(!is_known(recv_type) && (ast_id(receiver) == TK_TYPEREF))
{
ast_error(opt->check.errors, lhs, "a bare method cannot be called on "
"an abstract type reference");
return false;
}
}
break;
default: {}
}
return true;
}
static bool method_application(pass_opt_t* opt, ast_t* ast, bool partial)
{
AST_GET_CHILDREN(ast, positional, namedargs, lhs);
if(!check_type_params(opt, &lhs))
return false;
ast_t* type = ast_type(lhs);
if(is_typecheck_error(type))
return false;
AST_GET_CHILDREN(type, cap, typeparams, params, result);
if(!extend_positional_args(opt, params, positional))
return false;
if(!apply_named_args(opt, params, positional, namedargs))
return false;
if(!check_arg_types(opt, params, positional, partial))
return false;
switch(ast_id(lhs))
{
case TK_FUNREF:
case TK_FUNAPP:
if(!check_receiver_cap(opt, ast, NULL))
return false;
if(!check_nonsendable_recover(opt, ast))
return false;
break;
default: {}
}
return true;
}
static bool method_application(pass_opt_t* opt, ast_t* ast, bool partial)
{
// TODO: use args to decide unbound type parameters
AST_GET_CHILDREN(ast, positional, namedargs, lhs);
if(!check_type_params(&lhs))
return false;
ast_t* type = ast_type(lhs);
if(is_typecheck_error(type))
return false;
AST_GET_CHILDREN(type, cap, typeparams, params, result);
if(!extend_positional_args(params, positional))
return false;
if(!apply_named_args(params, positional, namedargs))
return false;
bool incomplete = is_this_incomplete(&opt->check, ast);
if(!check_arg_types(opt, params, positional, incomplete, partial))
return false;
switch(ast_id(lhs))
{
case TK_FUNREF:
case TK_FUNAPP:
if(!check_receiver_cap(ast, incomplete))
return false;
break;
default: {}
}
return true;
}
static bool method_chain(pass_opt_t* opt, ast_t* ast)
{
if(!method_application(opt, ast, false))
return false;
AST_GET_CHILDREN(ast, positional, namedargs, question, lhs);
ast_t* type = ast_type(lhs);
if(ast_id(ast_child(type)) == TK_AT)
{
ast_error(opt->check.errors, ast, "a bare method cannot be chained");
return false;
}
// We check the receiver cap now instead of in method_application because
// we need to know whether the receiver was recovered.
ast_t* r_type = method_receiver_type(lhs);
if(ast_id(lhs) == TK_FUNCHAIN)
{
bool recovered;
if(!check_receiver_cap(opt, ast, &recovered))
return false;
if(!check_nonsendable_recover(opt, ast))
return false;
ast_t* f_type = ast_type(lhs);
token_id f_cap = ast_id(ast_child(f_type));
ast_t* c_type = chain_type(r_type, f_cap, recovered);
ast_settype(ast, c_type);
} else {
ast_settype(ast, r_type);
}
return true;
}