ast_result_t expr_ffi(pass_opt_t* opt, ast_t* ast)
{
if(!package_allow_ffi(&opt->check))
{
ast_error(opt->check.errors, ast, "This package isn't allowed to do C FFI");
return AST_FATAL;
}
AST_GET_CHILDREN(ast, name, return_typeargs, args, namedargs, question);
assert(name != NULL);
ast_t* decl;
if(!ffi_get_decl(&opt->check, ast, &decl, opt))
return AST_ERROR;
if(decl != NULL) // We have a declaration
return declared_ffi(opt, ast, decl);
// We do not have a declaration
for(ast_t* arg = ast_child(args); arg != NULL; arg = ast_sibling(arg))
{
ast_t* a_type = ast_type(arg);
if((a_type != NULL) && is_type_literal(a_type))
{
ast_error(opt->check.errors, arg,
"Cannot pass number literals as unchecked FFI arguments");
return AST_ERROR;
}
}
ast_t* return_type = ast_child(return_typeargs);
if(return_type == NULL)
{
ast_error(opt->check.errors, name,
"FFIs without declarations must specify return type");
return AST_ERROR;
}
ast_settype(ast, return_type);
ast_inheritflags(ast);
if(ast_id(question) == TK_QUESTION)
ast_seterror(ast);
return AST_OK;
}
bool expr_ffi(pass_opt_t* opt, ast_t* ast)
{
AST_GET_CHILDREN(ast, name, return_typeargs, args, namedargs, question);
assert(name != NULL);
ast_t* decl;
if(!ffi_get_decl(&opt->check, ast, &decl, opt))
return false;
if(decl != NULL) // We have a declaration
return declared_ffi(opt, ast, decl);
// We do not have a declaration
for(ast_t* arg = ast_child(args); arg != NULL; arg = ast_sibling(arg))
{
ast_t* a_type = ast_type(arg);
if((a_type != NULL) && is_type_literal(a_type))
{
ast_error(opt->check.errors, arg,
"Cannot pass number literals as unchecked FFI arguments");
return false;
}
}
ast_t* return_type = ast_child(return_typeargs);
if(return_type == NULL)
{
ast_error(opt->check.errors, name,
"FFIs without declarations must specify return type");
return false;
}
ast_settype(ast, return_type);
return true;
}