Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.old-deja/g++.bugs/900322_01.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
---|---|
date | Thu, 13 Feb 2020 11:34:05 +0900 |
parents | 04ced10e8804 |
children |
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// { dg-do assemble } // g++ 1.37.1 bug 900322_01 // ** Old, obsolete commentary: // ************************************************************************** // The ANSI C standard, in section 3.1.2.5 (first paragraph) differentiates // types into three disjoint sets, i.e object types, function types, and // incomplete types. // Also in 3.1.2.5 (page 24) the standard says that the element type of // an array type is an object type. // Later in that same section the standard also notes that array types with // unknown size are considered incomplete types (page 25). (Struct & union // types which have only been "forward declared" are also incomplete types.) // Some experts infer this to mean that it is not legal to specify or to // construct an array *type* whose element type is an incomplete type. // This interpretation suggests that the statements indicated below contain // errors. // g++ fails to flag all of the indicated statements with errors (even when // the -pedantic option is used). // ************************************************************************** // The above commentary is wrong. (jason 1998/11/13) // In fact, the lines marked OK are well-formed; the prohibition is only // against forming array types with multiple unknown bounds. This prohibition // is found in 8.3.4 [dcl.array]. // It is also ill-formed to create an object of incomplete type. // keywords: incomplete types, arrays, element types extern int extern_two_d [] []; // { dg-error "12:declaration of .extern_two_d. as multidimensional" } invalid declaration int tenative_two_d [] []; // { dg-error "5:declaration of .tenative_two_d. as multidimensional" } caught by g++ static int static_two_d [] []; // { dg-error "12:declaration of .static_two_d. as multidimensional" } caught by g++ int (*pointer_to_two_d)[][]; // { dg-error "7:declaration of .pointer_to_two_d. as multidimensional" } invalid declaration void function_0 (int arg [] []) { // { dg-error "22:declaration of .arg. as multidimensional" } invalid declaration } typedef int int_one_d_type []; typedef int_one_d_type int_two_d_type[];// { dg-error "24:declaration of .int_two_d_type. as multidimensional" } invalid declaration struct s; extern struct s extern_s_array [10]; // OK struct s tenative_s_array [10]; // { dg-error "10:elements of array .s tenative_s_array \\\[10\\\]. have incomplete type" } object with incomplete type // { dg-error "10:storage size" "" { target *-*-* } .-1 } static struct s static_s_array [10]; // { dg-error "17:elements of array .s static_s_array \\\[10\\\]. have incomplete type" } object with incomplete type // { dg-error "17:storage size" "" { target *-*-* } .-1 } struct s (*pointer_to_s_array) []; // OK void function_1 (struct s arg []) { // OK } typedef struct s s_type; typedef s_type s_one_d_type [10]; // OK int main () { return 0; }