SCIP
Solving Constraint Integer Programs
Solving Constraint Integer Programs
methods and files provided by the default expression interpreters of SCIP
A detailed description what a expression interpreter does and how to add a expression interpreter to SCIP can be found here.
Modules | |
| Inclusion methods | |
| methods to include specific expression interpreters into SCIP | |
Files | |
| file | exprinterpret_cppad.cpp |
| methods to interpret (evaluate) an expression tree "fast" using CppAD | |
| file | exprinterpret_none.c |
| function definitions for nonexisting expression interpreter to resolve linking references | |
| const char* SCIPexprintGetName | ( | void | ) |
gets name and version of expression interpreter
Definition at line 2149 of file exprinterpret_cppad.cpp.
Referenced by doScipCreate(), SCIP_DECL_CONSINIT(), and SCIPnlpiOracleCreate().
| const char* SCIPexprintGetDesc | ( | void | ) |
gets descriptive text of expression interpreter
Definition at line 2155 of file exprinterpret_cppad.cpp.
Referenced by doScipCreate().
| SCIP_EXPRINTCAPABILITY SCIPexprintGetCapability | ( | void | ) |
gets capabilities of expression interpreter (using bitflags)
Definition at line 2161 of file exprinterpret_cppad.cpp.
References SCIP_EXPRINTCAPABILITY_FUNCVALUE, SCIP_EXPRINTCAPABILITY_GRADIENT, SCIP_EXPRINTCAPABILITY_HESSIAN, SCIP_EXPRINTCAPABILITY_INTFUNCVALUE, SCIP_EXPRINTCAPABILITY_INTGRADIENT, and SCIP_EXPRINTCAPABILITY_NONE.
Referenced by addIntervalGradientEstimator(), processNlRow(), and SCIP_DECL_NLPISOLVE().
| SCIP_RETCODE SCIPexprintCreate | ( | BMS_BLKMEM * | blkmem, |
| SCIP_EXPRINT ** | exprint | ||
| ) |
creates an expression interpreter object
| blkmem | block memory data structure |
| exprint | buffer to store pointer to expression interpreter |
Definition at line 2171 of file exprinterpret_cppad.cpp.
References BMSallocMemory, SCIP_NOMEMORY, SCIP_OKAY, and SCIPdebugMessage.
Referenced by applyHeur(), createCoveringProblem(), SCIP_DECL_SEPAEXECLP(), SCIPincludeConshdlrBivariate(), SCIPincludeConshdlrNonlinear(), and SCIPnlpiOracleCreate().
| SCIP_RETCODE SCIPexprintFree | ( | SCIP_EXPRINT ** | exprint | ) |
frees an expression interpreter object
| exprint | expression interpreter that should be freed |
Definition at line 2188 of file exprinterpret_cppad.cpp.
References BMSfreeMemory, and SCIP_OKAY.
Referenced by createCoveringProblem(), SCIP_DECL_CONSFREE(), SCIP_DECL_SEPAEXITSOL(), SCIPnlpiOracleFree(), and sepadataClear().
| SCIP_RETCODE SCIPexprintCompile | ( | SCIP_EXPRINT * | exprint, |
| SCIP_EXPRTREE * | tree | ||
| ) |
compiles an expression tree and stores compiled data in expression tree
| exprint | interpreter data structure |
| tree | expression tree |
Definition at line 2201 of file exprinterpret_cppad.cpp.
References analyzeTree(), SCIP_ExprInt::blkmem, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPexprCopyDeep(), SCIPexprFreeDeep(), SCIPexprtreeGetInterpreterData(), SCIPexprtreeGetNVars(), SCIPexprtreeGetRoot(), and SCIPexprtreeSetInterpreterData().
Referenced by addIntervalGradientEstimator(), addLinearization(), computeGradient(), computeViolation(), generate1ConvexIndefiniteUnderestimatorInTheInteriorPatternA(), generate1ConvexIndefiniteUnderestimatorInTheInteriorPatternB(), generateLinearizationCut(), generateOrthogonal_lx_ly_Underestimator(), generateOrthogonal_lx_uy_Underestimator(), generateUnderestimatorParallelYFacets(), initSepaData(), processNlRow(), SCIP_DECL_CONSINITLP(), SCIPnlpiOracleAddConstraints(), SCIPnlpiOracleChgExprtree(), and SCIPnlpiOracleSetObjective().
| SCIP_EXPRINTCAPABILITY SCIPexprintGetExprtreeCapability | ( | SCIP_EXPRINT * | exprint, |
| SCIP_EXPRTREE * | tree | ||
| ) |
gives the capability to evaluate an expression by the expression interpreter
In cases of user-given expressions, higher order derivatives may not be available for the user-expression, even if the expression interpreter could handle these. This method allows to recognize that, e.g., the Hessian for an expression is not available because it contains a user expression that does not provide Hessians.
| exprint | interpreter data structure |
| tree | expression tree |
Definition at line 2256 of file exprinterpret_cppad.cpp.
References SCIP_EXPRINTCAPABILITY_NONE, and SCIPexprtreeGetInterpreterData().
Referenced by SCIPnlpiOracleGetEvalCapability().
| SCIP_RETCODE SCIPexprintFreeData | ( | SCIP_EXPRINTDATA ** | interpreterdata | ) |
frees interpreter data
| interpreterdata | interpreter data that should freed |
Definition at line 2270 of file exprinterpret_cppad.cpp.
References SCIP_OKAY, and SCIPexprFreeDeep().
Referenced by SCIPexprtreeFreeInterpreterData().
| SCIP_RETCODE SCIPexprintNewParametrization | ( | SCIP_EXPRINT * | exprint, |
| SCIP_EXPRTREE * | tree | ||
| ) |
notify expression interpreter that a new parameterization is used this probably causes retaping by AD algorithms
notify expression interpreter that a new parameterization is used
This probably causes retaping by AD algorithms.
| exprint | interpreter data structure |
| tree | expression tree |
Definition at line 2290 of file exprinterpret_cppad.cpp.
References SCIP_OKAY, and SCIPexprtreeGetInterpreterData().
Referenced by generateConvexConcaveUnderestimator().
| SCIP_RETCODE SCIPexprintEval | ( | SCIP_EXPRINT * | exprint, |
| SCIP_EXPRTREE * | tree, | ||
| SCIP_Real * | varvals, | ||
| SCIP_Real * | val | ||
| ) |
evaluates an expression tree
| exprint | interpreter data structure |
| tree | expression tree |
| varvals | values of variables |
| val | buffer to store value |
Definition at line 2309 of file exprinterpret_cppad.cpp.
References eval(), SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPdebugMessage, SCIPerrorMessage, SCIPexprtreeEval(), SCIPexprtreeGetInterpreterData(), SCIPexprtreeGetNVars(), SCIPexprtreeGetParamVals(), and SCIPexprtreeGetRoot().
Referenced by addIntervalGradientEstimator(), computeViolation(), evalFunctionValue(), generateConvexConcaveUnderestimator(), generateEstimatingHyperplane(), SCIPexprintGrad(), SCIPexprintHessianDense(), SCIPexprintHessianSparsityDense(), and SCIPnlpiOracleEvalJacobian().
| SCIP_RETCODE SCIPexprintEvalInt | ( | SCIP_EXPRINT * | exprint, |
| SCIP_EXPRTREE * | tree, | ||
| SCIP_Real | infinity, | ||
| SCIP_INTERVAL * | varvals, | ||
| SCIP_INTERVAL * | val | ||
| ) |
evaluates an expression tree on intervals
| exprint | interpreter data structure |
| tree | expression tree |
| infinity | value for infinity |
| varvals | interval values of variables |
| val | buffer to store interval value of expression |
Definition at line 2377 of file exprinterpret_cppad.cpp.
References eval(), infinity, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPerrorMessage, SCIPexprtreeEvalInt(), SCIPexprtreeGetInterpreterData(), SCIPexprtreeGetNVars(), SCIPexprtreeGetParamVals(), and SCIPexprtreeGetRoot().
Referenced by SCIPexprintGradInt().
| SCIP_RETCODE SCIPexprintGrad | ( | SCIP_EXPRINT * | exprint, |
| SCIP_EXPRTREE * | tree, | ||
| SCIP_Real * | varvals, | ||
| SCIP_Bool | new_varvals, | ||
| SCIP_Real * | val, | ||
| SCIP_Real * | gradient | ||
| ) |
computes value and gradient of an expression tree
| exprint | interpreter data structure |
| tree | expression tree |
| varvals | values of variables, can be NULL if new_varvals is FALSE |
| new_varvals | have variable values changed since last call to a point evaluation routine? |
| val | buffer to store expression value |
| gradient | buffer to store expression gradient, need to have length at least SCIPexprtreeGetNVars(tree) |
Definition at line 2443 of file exprinterpret_cppad.cpp.
References FALSE, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPerrorMessage, SCIPexprintEval(), SCIPexprtreeGetInterpreterData(), and SCIPexprtreeGetNVars().
Referenced by addLinearization(), computeGradient(), evalFunctionGradient(), generate1ConvexIndefiniteUnderestimatorAtBoundary(), generate1ConvexIndefiniteUnderestimatorInTheInteriorPatternA(), generate1ConvexIndefiniteUnderestimatorInTheInteriorPatternB(), generateConvexConcaveUnderestimator(), generateLinearizationCut(), generateOrthogonal_lx_ly_Underestimator(), generateOrthogonal_lx_uy_Underestimator(), generateUnderestimatorParallelYFacets(), lifting(), SCIPnlpiOracleEvalJacobian(), and solveDerivativeEquation().
| SCIP_RETCODE SCIPexprintGradInt | ( | SCIP_EXPRINT * | exprint, |
| SCIP_EXPRTREE * | tree, | ||
| SCIP_Real | infinity, | ||
| SCIP_INTERVAL * | varvals, | ||
| SCIP_Bool | new_varvals, | ||
| SCIP_INTERVAL * | val, | ||
| SCIP_INTERVAL * | gradient | ||
| ) |
computes interval value and interval gradient of an expression tree
| exprint | interpreter data structure |
| tree | expression tree |
| infinity | value for infinity |
| varvals | interval values of variables, can be NULL if new_varvals is FALSE |
| new_varvals | have variable interval values changed since last call to an interval evaluation routine? |
| val | buffer to store expression interval value |
| gradient | buffer to store expression interval gradient, need to have length at least SCIPexprtreeGetNVars(tree) |
Definition at line 2490 of file exprinterpret_cppad.cpp.
References SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPerrorMessage, SCIPexprintEvalInt(), SCIPexprtreeGetInterpreterData(), and SCIPexprtreeGetNVars().
Referenced by addIntervalGradientEstimator().
| SCIP_RETCODE SCIPexprintHessianSparsityDense | ( | SCIP_EXPRINT * | exprint, |
| SCIP_EXPRTREE * | tree, | ||
| SCIP_Real * | varvals, | ||
| SCIP_Bool * | sparsity | ||
| ) |
gives sparsity pattern of hessian
NOTE: this function might be replaced later by something nicer. Since the AD code might need to do a forward sweep, you should pass variable values in here.
gives sparsity pattern of hessian NOTE: this function might be replaced later by something nicer Since the AD code might need to do a forward sweep, you should pass variable values in here.
| exprint | interpreter data structure |
| tree | expression tree |
| varvals | values of variables |
| sparsity | buffer to store sparsity pattern of Hessian, sparsity[i+n*j] indicates whether entry (i,j) is nonzero in the hessian |
Definition at line 2540 of file exprinterpret_cppad.cpp.
References SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPdebugMessage, SCIPerrorMessage, SCIPexprintEval(), SCIPexprtreeGetInterpreterData(), SCIPexprtreeGetNVars(), and TRUE.
Referenced by hessLagSparsitySetNzFlagForExprtree(), initSepaData(), and processNlRow().
| SCIP_RETCODE SCIPexprintHessianDense | ( | SCIP_EXPRINT * | exprint, |
| SCIP_EXPRTREE * | tree, | ||
| SCIP_Real * | varvals, | ||
| SCIP_Bool | new_varvals, | ||
| SCIP_Real * | val, | ||
| SCIP_Real * | hessian | ||
| ) |
computes value and dense hessian of an expression tree
The full hessian is computed (lower left and upper right triangle).
computes value and dense hessian of an expression tree the full hessian is computed (lower left and upper right triangle)
| exprint | interpreter data structure |
| tree | expression tree |
| varvals | values of variables, can be NULL if new_varvals is FALSE |
| new_varvals | have variable values changed since last call to an evaluation routine? |
| val | buffer to store function value |
| hessian | buffer to store hessian values, need to have size at least n*n |
Definition at line 2613 of file exprinterpret_cppad.cpp.
References FALSE, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPerrorMessage, SCIPexprintEval(), SCIPexprtreeGetInterpreterData(), and SCIPexprtreeGetNVars().
Referenced by generate1ConvexIndefiniteUnderestimator(), hessLagAddExprtree(), and solveDerivativeEquation().