Add missing type assignment operator

[ctf.git] / common-trace-format-proposal.txt

diff --git a/common-trace-format-proposal.txt b/common-trace-format-proposal.txt
index 361c2ec39c21f35ceb06363b218b0c683113d284..4cd7e7c751fcdbb851ac1f0c500471826827a269 100644 (file)
--- a/common-trace-format-proposal.txt
+++ b/common-trace-format-proposal.txt
@@ -68,14 +68,10 @@ A metadata event stream contains information on trace event types. It describes:
 3. Event stream
 
 An event stream is divided in contiguous event packets of variable size. These
 3. Event stream
 
 An event stream is divided in contiguous event packets of variable size. These

-subdivisions have a variable size. An event packet can contain a certain amount
-of padding at the end. The rationale for the event stream design choices is
-explained in Appendix B. Stream Header Rationale.
-
-An event stream is divided in contiguous event packets of variable size. These
-subdivisions have a variable size. An event packet can contain a certain amount
-of padding at the end.  The stream header is repeated at the beginning of each
-event packet.
+subdivisions have a variable size. An event packet can contain a certain
+amount of padding at the end. The stream header is repeated at the
+beginning of each event packet. The rationale for the event stream
+design choices is explained in Appendix B. Stream Header Rationale.

 
 The event stream header will therefore be referred to as the "event packet
 header" throughout the rest of this document.
 
 The event stream header will therefore be referred to as the "event packet
 header" throughout the rest of this document.


@@ -791,10 +787,12 @@ variant field), a declaration is followed by a declarator, which specify
 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,
 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.
+similarly to C99. The enumeration type specifier and variant tag name
+(both specified with "<" ">") are part of the type specifier.

 
 A definition associates a type to a location in the event structure
 
 A definition associates a type to a location in the event structure

-hierarchy (see Section 6).
+hierarchy (see Section 6). This association is denoted by ":=", as shown
+in Section 7.3.

 
 
 7.2 Metadata Scopes
 
 
 7.2 Metadata Scopes


@@ -845,8 +843,14 @@ different scopes. There is no possible conflict, because the dynamic
 scope must be specified when a variant refers to a tag field located in
 a different dynamic scope.
 
 scope must be specified when a variant refers to a tag field located in
 a different dynamic scope.
 

+The information available in the dynamic scopes can be thought of as the
+current tracing context. At trace production, information about the
+current context is saved into the specified scope field levels. At trace
+consumption, for each event, the current trace context is therefore
+readable by accessing the upper dynamic scopes.

 
 

-7.2 Metadata Examples
+
+7.3 Metadata Examples

 
 The grammar representing the CTF metadata is presented in
 Appendix C. CTF Metadata Grammar. This section presents a rather ligher
 
 The grammar representing the CTF metadata is presented in
 Appendix C. CTF Metadata Grammar. This section presents a rather ligher


@@ -1240,6 +1244,9 @@ unary-operator: one of
 assignment-operator:
        =
 
 assignment-operator:
        =
 

+type-assignment-operator:
+       :=
+

 constant-expression:
        unary-expression
 
 constant-expression:
        unary-expression
 


@@ -1280,6 +1287,7 @@ type-specifier:
        unsigned
        _Bool
        _Complex
        unsigned
        _Bool
        _Complex

+       _Imaginary

        struct-specifier
        variant-specifier
        enum-specifier
        struct-specifier
        variant-specifier
        enum-specifier