DiagnosticContext< VAL > Class Template Reference

#include "lib/diagnostic-context.hpp"

Description

template<typename VAL>
class lib::DiagnosticContext< VAL >

Diagnostic data frame to collect specific information concerning a scope.

To be placed explicitly as an automatic (stack) variable. Provides a controlled environment for hooking up diagnostic code. Within each thread, a stack of such information frames concerning nested scopes is maintained automatically. It can be accessed via static API.

Warning

relies on thread-local access; never use this within global data structures.

Definition at line 60 of file diagnostic-context.hpp.

Public Member Functions
	DiagnosticContext (VAL const &value_to_log=VAL())
	operator VAL const & ()

Static Public Member Functions
static DiagnosticContext &	access ()
	accessing the innermost diagnostic context created
static ValSequence	extractStack ()
	snapshot of the current stack of diagnostic frames More...

Private Types
using	ValSequence = std::vector< VAL >

Static Private Member Functions
static DiagnosticContext *&	current ()
	embedded thread local pointer to the innermost context encountered

Private Attributes
DiagnosticContext *const	prev_
const VAL	value_

Additional Inherited Members
Private Member Functions inherited from NonCopyable
	NonCopyable (NonCopyable const &)=delete
NonCopyable &	operator= (NonCopyable const &)=delete

Member Function Documentation

extractStack()

static ValSequence extractStack ( )

inlinestatic

snapshot of the current stack of diagnostic frames

Returns

vector with all the payload values currently on the thread-local diagnostic stack. Might be empty. Values start with frame next to the current scope and end with outermost.

Warning

can be inefficient on very large stacks

Todo:

benchmark and improve the data structure used for the snapshot. Vector is not an optimal choice here.

Definition at line 119 of file diagnostic-context.hpp.

References DiagnosticContext< VAL >::current().

Referenced by DiagnosticContext_test::verify_simpleAccess().

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The documentation for this class was generated from the following file:

• diagnostic-context.hpp