TMB Documentation  v1.9.11
Public Member Functions | List of all members
TMBad::global::ad_plain::ValOp Struct Reference

Copy value and set derivative to zero. More...

#include <global.hpp>

Public Member Functions

void dependencies (Args<> &args, Dependencies &dep) const
 Derivatives in the sparse case are untracked, i.e. zero. More...
 
template<class Type >
Type eval (Type x0)
 Evaluation is as the CopyOp except in replay mode.
 
template<class Type >
void reverse (ReverseArgs< Type > &args)
 Derivatives in the dense case are zero.
 
- Public Member Functions inherited from TMBad::global::Operator< 1 >
void dependencies_updating (Args<> &args, Dependencies &dep) const
 Default implementation of OperatorPure::dependencies_updating()
 
void * operator_data ()
 Return operator specific dynamic information (optional)
 
OperatorPureother_fuse (OperatorPure *self, OperatorPure *other)
 How to fuse this operator (self) with another (other)
 
void print (print_config cfg)
 Print this operator (optional)
 

Additional Inherited Members

- Static Public Attributes inherited from TMBad::global::Operator< 1 >
static const bool add_forward_replay_copy
 Should this operator replay it self by invoking the copy CTOR ?
 
static const bool add_static_identifier
 Should this operator have a static identifier ?
 
static const bool allow_remap
 Is it safe to remap the inputs of this operator? More...
 
static const int dependent_variable
 Is output of this operator a dependent variable ?
 
static const bool dynamic
 Does this operator require dynamic allocation ?
 
static const bool elimination_protected
 Protect this operator from elimination by the tape optimizer ?
 
static const bool have_dependencies
 Have dependencies member been defined ?
 
static const bool have_eval
 Does this class have an eval member from which to define forward ?
 
static const bool have_forward_incr_reverse_decr
 Have forward_incr and reverse_incr members been defined ?
 
static const bool have_forward_mark_reverse_mark
 Have forward_mark and reverse_mark members been defined ?
 
static const bool have_forward_reverse
 Have forward and reverse members been defined ?
 
static const bool have_increment_decrement
 Have increment and decrement members been defined ?
 
static const bool have_input_size_output_size
 Have input_size and output_size members been defined ?
 
static const bool implicit_dependencies
 Does this operator have implicit dependencies? More...
 
static const int independent_variable
 Is output of this operator an independent variable ?
 
static const bool is_constant
 Is this a constant operator ?
 
static const bool is_linear
 Is this a linear operator ?
 
static const int max_fuse_depth
 How many times can this operator be doubled ?
 
static const int ninput
 Number of operator inputs.
 
static const int noutput
 Number of operator outputs.
 
static const bool smart_pointer
 Is this operator a 'smart pointer' (with reference counting) ?
 
static const bool updating
 This operator may update existing variables ? More...
 

Detailed Description

Copy value and set derivative to zero.

The purpose of this operator is to allow using temporaries without tracking their derivatives. The ValOp has the following properties:

Definition at line 2625 of file global.hpp.

Member Function Documentation

§ dependencies()

void TMBad::global::ad_plain::ValOp::dependencies ( Args<> &  args,
Dependencies &  dep 
) const

Derivatives in the sparse case are untracked, i.e. zero.

Note
Inputs to ValOp are not marked for removal by the tape optimizer despite the empty dependencies (because the tape optimizer uses the boolean pattern which has the default mark_dense implementation).

Definition at line 1979 of file TMBad.cpp.


The documentation for this struct was generated from the following files:
License: GPL v2