tree build_capture_proxy (tree member) { tree var, object, fn, closure, name, lam, type; if (PACK_EXPANSION_P (member)) member = PACK_EXPANSION_PATTERN (member); closure = DECL_CONTEXT (member); fn = lambda_function (closure); lam = CLASSTYPE_LAMBDA_EXPR (closure); /* The proxy variable forwards to the capture field. */ object = build_fold_indirect_ref (DECL_ARGUMENTS (fn)); object = finish_non_static_data_member (member, object, NULL_TREE); if (REFERENCE_REF_P (object)) object = TREE_OPERAND (object, 0); /* Remove the __ inserted by add_capture. */ if (DECL_NORMAL_CAPTURE_P (member)) name = get_identifier (IDENTIFIER_POINTER (DECL_NAME (member)) + 2); else name = DECL_NAME (member); type = lambda_proxy_type (object); if (DECL_VLA_CAPTURE_P (member)) { /* Rebuild the VLA type from the pointer and maxindex. */ tree field = next_initializable_field (TYPE_FIELDS (type)); tree ptr = build_simple_component_ref (object, field); field = next_initializable_field (DECL_CHAIN (field)); tree max = build_simple_component_ref (object, field); type = build_cplus_array_type (TREE_TYPE (TREE_TYPE (ptr)), build_index_type (max)); type = build_reference_type (type); REFERENCE_VLA_OK (type) = true; object = convert (type, ptr); } var = build_decl (input_location, VAR_DECL, name, type); SET_DECL_VALUE_EXPR (var, object); DECL_HAS_VALUE_EXPR_P (var) = 1; DECL_ARTIFICIAL (var) = 1; TREE_USED (var) = 1; DECL_CONTEXT (var) = fn; if (name == this_identifier) { gcc_assert (LAMBDA_EXPR_THIS_CAPTURE (lam) == member); LAMBDA_EXPR_THIS_CAPTURE (lam) = var; } if (fn == current_function_decl) insert_capture_proxy (var); else vec_safe_push (LAMBDA_EXPR_PENDING_PROXIES (lam), var); return var; }
void insert_pending_capture_proxies (void) { tree lam; vec<tree, va_gc> *proxies; unsigned i; if (!current_function_decl || !LAMBDA_FUNCTION_P (current_function_decl)) return; lam = CLASSTYPE_LAMBDA_EXPR (DECL_CONTEXT (current_function_decl)); proxies = LAMBDA_EXPR_PENDING_PROXIES (lam); for (i = 0; i < vec_safe_length (proxies); ++i) { tree var = (*proxies)[i]; insert_capture_proxy (var); } release_tree_vector (LAMBDA_EXPR_PENDING_PROXIES (lam)); LAMBDA_EXPR_PENDING_PROXIES (lam) = NULL; }
tree build_lambda_expr (void) { tree lambda = make_node (LAMBDA_EXPR); LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda) = CPLD_NONE; LAMBDA_EXPR_CAPTURE_LIST (lambda) = NULL_TREE; LAMBDA_EXPR_THIS_CAPTURE (lambda) = NULL_TREE; LAMBDA_EXPR_PENDING_PROXIES (lambda) = NULL; LAMBDA_EXPR_RETURN_TYPE (lambda) = NULL_TREE; LAMBDA_EXPR_MUTABLE_P (lambda) = false; return lambda; }