is in fact a range of size 1. This single-value range is supported without
repeating the start and end values with the value = string declaration.
-enum name <integer_type> {
+enum name : integer_type {
somestring = start_value1 ... end_value1,
"other string" = start_value2 ... end_value2,
yet_another_string, /* will be assigned to end_value2 + 1 */
If the values are omitted, the enumeration starts at 0 and increment of 1 for
each entry:
-enum name <unsigned int> {
+enum name : unsigned int {
ZERO,
ONE,
TWO,
A nameless enumeration can be declared as a field type or as part of a typedef:
-enum <integer_type> {
+enum : integer_type {
...
}
};
struct {
- enum <integer_type> { sel1, sel2, sel3, ... } tag_field;
+ enum : integer_type { sel1, sel2, sel3, ... } tag_field;
...
variant name <tag_field> v;
}
metadata:
struct {
- enum <integer_type> { sel1, sel2, sel3, ... } tag_field;
+ enum : integer_type { sel1, sel2, sel3, ... } tag_field;
...
variant <tag_field> {
field_type sel1;
};
struct {
- enum <uint2_t> { a, b, c } choice;
+ enum : uint2_t { a, b, c } choice;
variant example <choice> v[unsigned int];
}
Example of an unnamed variant:
struct {
- enum <uint2_t> { a, b, c, d } choice;
+ enum : uint2_t { a, b, c, d } choice;
/* Unrelated fields can be added between the variant and its tag */
int32_t somevalue;
variant <choice> {
Example of an unnamed variant within an array:
struct {
- enum <uint2_t> { a, b, c } choice;
+ enum : uint2_t { a, b, c } choice;
variant <choice> {
uint32_t a;
uint64_t b;
the lexical scope of the type definition.
struct {
- enum <uint2_t> { a, b, c, d } x;
+ enum : uint2_t { a, b, c, d } x;
typedef variant <x> { /*
* "x" refers to the preceding "x" enumeration in the
} example_variant;
struct {
- enum <int> { x, y, z } x; /* This enumeration is not used by "v". */
+ enum : int { x, y, z } x; /* This enumeration is not used by "v". */
example_variant v; /*
- * "v" uses the "enum <uint2_t> { a, b, c, d }"
+ * "v" uses the "enum : uint2_t { a, b, c, d }"
* tag.
*/
} a[10];
* id: range: 0 - 30.
* id 31 is reserved to indicate an extended header.
*/
- enum <uint5_t> { compact = 0 ... 30, extended = 31 } id;
+ enum : uint5_t { compact = 0 ... 30, extended = 31 } id;
variant <id> {
struct {
uint27_t timestamp;
* id: range: 0 - 65534.
* id 65535 is reserved to indicate an extended header.
*/
- enum <uint16_t> { compact = 0 ... 65534, extended = 65535 } id;
+ enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;
variant <id> {
struct {
uint32_t timestamp;
the newly defined type name (for typedef), or the field name (for
declarations located within structure and variants). Array and sequence,
declared with square brackets ("[" "]"), are part of the declarator,
-similarly to C99. The enumeration type specifier and variant tag name
-(both specified with "<" ">") are part of the type specifier.
+similarly to C99. The enumeration base type is specified by
+": base_type", which is part of the type specifier. The variant tag
+name, specified between "<" ">", is also part of the type specifier.
A definition associates a type to a location in the event structure
hierarchy (see Section 6). This association is denoted by ":=", as shown
...
};
-enum name <integer_type> {
+enum name : integer_type {
...
};
...
}
-enum <integer_type> {
+enum : integer_type {
...
}
enum identifier-opt { enumerator-list }
enum identifier-opt { enumerator-list , }
enum identifier
- enum identifier-opt < declaration-specifiers > { enumerator-list }
- enum identifier-opt < declaration-specifiers > { enumerator-list , }
- enum identifier < declaration-specifiers >
+ enum identifier-opt : declaration-specifiers { enumerator-list }
+ enum identifier-opt : declaration-specifiers { enumerator-list , }
enumerator-list:
enumerator