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Differentiate.mo
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Differentiate.mo
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/*
* This file is part of OpenModelica.
*
* Copyright (c) 1998-2014, Open Source Modelica Consortium (OSMC),
* c/o Linköpings universitet, Department of Computer and Information Science,
* SE-58183 Linköping, Sweden.
*
* All rights reserved.
*
* THIS PROGRAM IS PROVIDED UNDER THE TERMS OF GPL VERSION 3 LICENSE OR
* THIS OSMC PUBLIC LICENSE (OSMC-PL) VERSION 1.2.
* ANY USE, REPRODUCTION OR DISTRIBUTION OF THIS PROGRAM CONSTITUTES
* RECIPIENT'S ACCEPTANCE OF THE OSMC PUBLIC LICENSE OR THE GPL VERSION 3,
* ACCORDING TO RECIPIENTS CHOICE.
*
* The OpenModelica software and the Open Source Modelica
* Consortium (OSMC) Public License (OSMC-PL) are obtained
* from OSMC, either from the above address,
* from the URLs: http://www.ida.liu.se/projects/OpenModelica or
* http://www.openmodelica.org, and in the OpenModelica distribution.
* GNU version 3 is obtained from: http://www.gnu.org/copyleft/gpl.html.
*
* This program is distributed WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE, EXCEPT AS EXPRESSLY SET FORTH
* IN THE BY RECIPIENT SELECTED SUBSIDIARY LICENSE CONDITIONS OF OSMC-PL.
*
* See the full OSMC Public License conditions for more details.
*
*/
encapsulated package Differentiate
" file: Differentiate.mo
package: Differentiate
description: Differentiation of equations from BackendDAE.BackendDAE
This module is responsible for symbolic differentiation of equations and
expressions.
The symbolic differentiation is used in the Newton-Raphson method and in
index reduction."
// public imports
public import Absyn;
public import BackendDAE;
public import DAE;
public import DAEUtil;
public import Types;
// protected imports
protected import AbsynUtil;
protected import Algorithm;
protected import Array;
protected import BackendDump;
protected import BackendDAECreate;
protected import BackendDAEUtil;
protected import BackendEquation;
protected import BackendUtil;
protected import BackendVariable;
protected import BackendVarTransform;
protected import ClassInf;
protected import ComponentReference;
protected import DAEDump;
protected import DAEDumpTpl;
protected import Debug;
protected import ElementSource;
protected import Error;
protected import Expression;
protected import ExpressionSimplify;
protected import ExpressionDump;
protected import Flags;
protected import Inline;
protected import List;
protected import SCode;
protected import Util;
protected import SymbolicJacobian.DAE_CJ;
constant Integer defaultMaxIter = 20;
// =============================================================================
// differentiation interfaces:
// - createDifferentiatedCrefName
// - createSeedCrefName
// - differentiateEquation
// - differentiateEquationTime
// - differentiateExpCrefFullJacobian
// - differentiateExpSolve
// - differentiateExpTime
// =============================================================================
public function differentiateEquationTime
"Differentiates an equation with respect to time.
Returns NONE() if it was not possible to calculate a derivative."
input BackendDAE.Equation inEquation;
input BackendDAE.Variables inVariables;
input BackendDAE.Shared inShared;
output Option<BackendDAE.Equation> outEquation;
output BackendDAE.Shared outShared = inShared;
protected
BackendDAE.DifferentiateInputData diffData;
BackendDAE.Equation eqn;
BackendDAE.Variables knvars;
DAE.ElementSource source;
DAE.FunctionTree funcs;
algorithm
try
if Flags.isSet(Flags.DEBUG_DIFFERENTIATION) then
BackendDump.debugStrEqnStr("### differentiateEquationTime\n", inEquation, " w.r.t. time\n");
end if;
funcs := BackendDAEUtil.getFunctions(inShared);
knvars := BackendDAEUtil.getGlobalKnownVarsFromShared(inShared);
diffData := BackendDAE.emptyInputData;
diffData.dependenentVars := SOME(inVariables);
diffData.knownVars := SOME(knvars);
diffData.allVars := SOME(inVariables);
(eqn, funcs) := differentiateEquation(inEquation, DAE.crefTime, diffData, BackendDAE.DIFFERENTIATION_TIME(), funcs);
outEquation := SOME(eqn);
outShared := BackendDAEUtil.setSharedFunctionTree(inShared, funcs);
if Flags.isSet(Flags.DEBUG_DIFFERENTIATION) then
BackendDump.debugStrEqnStr("### Result of differentiateEquationTime\n --> ", eqn, "\n");
end if;
else
source := BackendEquation.equationSource(inEquation);
Error.addSourceMessage(Error.INTERNAL_ERROR, {"\nDifferentiate.differentiateEquationTime failed for " + BackendDump.equationString(inEquation) + "\n\n"}, ElementSource.getElementSourceFileInfo(source));
outEquation := NONE();
end try;
end differentiateEquationTime;
public function differentiateExpTime
"Differentiates an expression with respect to time."
input DAE.Exp inExp;
input BackendDAE.Variables inVariables;
input BackendDAE.Shared inShared;
output DAE.Exp outExp;
output BackendDAE.Shared outShared;
protected
DAE.Exp dexp;
DAE.FunctionTree funcs;
BackendDAE.DifferentiateInputData diffData;
BackendDAE.Variables knvars;
algorithm
try
if Flags.isSet(Flags.DEBUG_DIFFERENTIATION) then
BackendDump.debugStrExpStr("### differentiateExpTime\n ", inExp, " w.r.t. time\n");
end if;
funcs := BackendDAEUtil.getFunctions(inShared);
knvars := BackendDAEUtil.getGlobalKnownVarsFromShared(inShared);
diffData := BackendDAE.emptyInputData;
diffData.dependenentVars := SOME(inVariables);
diffData.knownVars := SOME(knvars);
(dexp, funcs) := differentiateExp(inExp, DAE.crefTime, diffData, BackendDAE.DIFFERENTIATION_TIME(), funcs, defaultMaxIter);
(outExp, _) := ExpressionSimplify.simplify(dexp);
outShared := BackendDAEUtil.setSharedFunctionTree(inShared, funcs);
if Flags.isSet(Flags.DEBUG_DIFFERENTIATION) then
BackendDump.debugStrExpStr("### Result of differentiateExpTime\n --> ", outExp, "n");
end if;
else
// expandDerOperator expects sometime that differentiate fails,
// so the calling function need to take care of the error messages.
// TODO: change that in expandDerOperator
//Error.addSourceMessage(Error.INTERNAL_ERROR, {msg}, ElementSource.getElementSourceFileInfo(DAE.emptyElementSource));
if Flags.isSet(Flags.FAILTRACE) then
Error.addSourceMessage(Error.NON_EXISTING_DERIVATIVE, {ExpressionDump.printExpStr(inExp), "time"}, sourceInfo());
end if;
fail();
end try;
end differentiateExpTime;
public function differentiateExpSolve
"Differentiates an expression with respect to inCref."
input DAE.Exp inExp;
input DAE.ComponentRef inCref;
input Option<DAE.FunctionTree> functions;
output DAE.Exp outExp;
protected
list<DAE.Exp> fac = Expression.factors(inExp);
DAE.Exp dexp;
DAE.FunctionTree fun;
algorithm
({}, _) := List.split1OnTrue(fac, Expression.expHasCrefInIf, inCref); // check if differentiateExpSolve is allowed
try
fun := match(functions)
local
DAE.FunctionTree fun_;
case SOME(fun_) then fun_;
else DAE.AvlTreePathFunction.Tree.EMPTY();
end match;
if Flags.isSet(Flags.DEBUG_DIFFERENTIATION) then
BackendDump.debugStrExpStrCrefStr("### differentiateExpSolve\n ", inExp, " w.r.t. ", inCref, "\n");
end if;
(dexp, _) := differentiateExp(inExp, inCref, BackendDAE.emptyInputData, BackendDAE.SIMPLE_DIFFERENTIATION(), fun, defaultMaxIter);
(outExp, _) := ExpressionSimplify.simplify(dexp);
if Flags.isSet(Flags.DEBUG_DIFFERENTIATION) then
BackendDump.debugStrExpStr("### Result of differentiateExpSolve\n --> ", outExp, "\n");
end if;
else
if Flags.isSet(Flags.FAILTRACE) then
Error.addSourceMessage(Error.NON_EXISTING_DERIVATIVE, {ExpressionDump.printExpStr(inExp), ComponentReference.crefStr(inCref)}, sourceInfo());
end if;
fail();
end try;
end differentiateExpSolve;
public function differentiateExpCrefFullJacobian
"Differentiates an expression inExp with respect to inCref."
input DAE.Exp inExp;
input DAE.ComponentRef inCref;
input BackendDAE.Variables inVariables;
input BackendDAE.Shared inShared;
output DAE.Exp outExp;
output BackendDAE.Shared outShared;
protected
DAE.Exp dexp;
DAE.FunctionTree funcs;
BackendDAE.DifferentiateInputData diffData;
BackendDAE.Variables knvars;
algorithm
try
funcs := BackendDAEUtil.getFunctions(inShared);
knvars := BackendDAEUtil.getGlobalKnownVarsFromShared(inShared);
diffData := BackendDAE.emptyInputData;
diffData.dependenentVars := SOME(inVariables);
diffData.knownVars := SOME(knvars);
(dexp, funcs) := differentiateExp(inExp, inCref, diffData, BackendDAE.DIFF_FULL_JACOBIAN(), funcs, defaultMaxIter);
(outExp,_) := ExpressionSimplify.simplify(dexp);
outShared := BackendDAEUtil.setSharedFunctionTree(inShared, funcs);
else
// expandDerOperator expects sometimes that differentiate fails,
// so the calling function need to take care of the error messages.
// TODO: change that in expandDerOperator
//Error.addSourceMessage(Error.INTERNAL_ERROR, {msg}, ElementSource.getElementSourceFileInfo(DAE.emptyElementSource));
if Flags.isSet(Flags.FAILTRACE) then
Error.addSourceMessage(Error.NON_EXISTING_DERIVATIVE, {ExpressionDump.printExpStr(inExp), ComponentReference.crefStr(inCref)}, sourceInfo());
end if;
fail();
end try;
end differentiateExpCrefFullJacobian;
// =============================================================================
// further interface functions to differentiation
// - differentiateEquation
// - differentiateBackendDAE
//
// =============================================================================
public function differentiateEquation
"Differentiates an equation with respect to a cref."
input BackendDAE.Equation inEquation;
input DAE.ComponentRef inDiffwrtCref;
input BackendDAE.DifferentiateInputData inInputData;
input BackendDAE.DifferentiationType inDiffType;
input DAE.FunctionTree inFunctionTree;
output BackendDAE.Equation outEquation;
output DAE.FunctionTree outFunctionTree;
algorithm
try
(outEquation, outFunctionTree) := differentiateEquationFragile(inEquation, inDiffwrtCref, inInputData, inDiffType, inFunctionTree);
else
Error.addSourceMessage(Error.NON_EXISTING_DERIVATIVE, {BackendDump.equationString(inEquation), ComponentReference.crefStr(inDiffwrtCref)}, sourceInfo());
fail();
end try;
end differentiateEquation;
public function differentiateEquationFragile
"author: kabdelhak 2019-09
Differentiates an equation with respect to a cref, fails if it can't be differentiated."
input BackendDAE.Equation inEquation;
input DAE.ComponentRef inDiffwrtCref;
input BackendDAE.DifferentiateInputData inInputData;
input BackendDAE.DifferentiationType inDiffType;
input DAE.FunctionTree inFunctionTree;
output BackendDAE.Equation outEquation;
output DAE.FunctionTree outFunctionTree;
algorithm
// Debug dump
if Flags.isSet(Flags.DEBUG_DIFFERENTIATION) then
BackendDump.debugStrEqnStr("### differentiateEquation\n ", inEquation, " w.r.t. " + ComponentReference.crefStr(inDiffwrtCref) + "\n");
end if;
(outEquation, outFunctionTree) := match inEquation
local
DAE.Exp e1_1, e2_1, e1_2, e2_2, e1, e2;
DAE.ComponentRef cref;
DAE.ElementSource source;
Integer size;
Option<Integer> recordSize;
list<DAE.Exp> out1, expExpLst, expExpLst1;
DAE.Type exptyp;
list<Integer> dimSize;
String se1, dse1, se2, dse2;
DAE.SymbolicOperation op1, op2;
DAE.FunctionTree funcs;
DAE.Algorithm alg;
list<BackendDAE.Equation> eqns;
list<list<BackendDAE.Equation>> eqnslst;
list<DAE.Statement> statementLst;
DAE.Expand expand;
BackendDAE.WhenEquation whenEqn;
BackendDAE.EquationAttributes eqAttr;
// equations
case BackendDAE.EQUATION(exp=e1, scalar=e2, source=source, attr=eqAttr)
equation
(e1_1, funcs) = differentiateExp(e1, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, defaultMaxIter);
(e1_1, _) = ExpressionSimplify.simplify(e1_1);
(e2_1, funcs) = differentiateExp(e2, inDiffwrtCref, inInputData, inDiffType, funcs, defaultMaxIter);
(e2_1, _) = ExpressionSimplify.simplify(e2_1);
op1 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e1, e1_1);
op2 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e2, e2_1);
source = List.foldr({op1, op2}, ElementSource.addSymbolicTransformation, source);
then
(BackendDAE.EQUATION(e1_1, e2_1, source, eqAttr), funcs);
// solved equations
case BackendDAE.SOLVED_EQUATION(componentRef=cref, exp=e2, source=source, attr=eqAttr)
equation
e1 = Expression.crefExp(cref);
(e1_1, funcs) = differentiateExp(e1, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, defaultMaxIter);
(e1_1, _) = ExpressionSimplify.simplify(e1_1);
(e2_1, funcs) = differentiateExp(e2, inDiffwrtCref, inInputData, inDiffType, funcs, defaultMaxIter);
(e2_1, _) = ExpressionSimplify.simplify(e2_1);
op1 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e1, e1_1);
op2 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e2, e2_1);
source = List.foldr({op1, op2}, ElementSource.addSymbolicTransformation, source);
then
(BackendDAE.EQUATION(e1_1, e2_1, source, eqAttr), funcs);
// RESIDUAL_EQUATION
case BackendDAE.RESIDUAL_EQUATION(exp=e1, source=source, attr=eqAttr)
equation
(e1_1, funcs) = differentiateExp(e1, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, defaultMaxIter);
(e1_1, _) = ExpressionSimplify.simplify(e1_1);
op1 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e1, e1_1);
source = List.foldr({op1}, ElementSource.addSymbolicTransformation, source);
then
(BackendDAE.RESIDUAL_EQUATION(e1_1, source, eqAttr), funcs);
// complex equations
case BackendDAE.COMPLEX_EQUATION(size=size, left=e1, right=e2, source=source, attr=eqAttr)
equation
(e1_1, funcs) = differentiateExp(e1, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, defaultMaxIter);
(e1_1, _) = ExpressionSimplify.simplify(e1_1);
(e2_1, funcs) = differentiateExp(e2, inDiffwrtCref, inInputData, inDiffType, funcs, defaultMaxIter);
(e2_1, _) = ExpressionSimplify.simplify(e2_1);
op1 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e1, e1_1);
op2 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e2, e2_1);
source = List.foldr({op1, op2}, ElementSource.addSymbolicTransformation, source);
then
(BackendDAE.COMPLEX_EQUATION(size, e1_1, e2_1, source, eqAttr), funcs);
// Array Equations
case BackendDAE.ARRAY_EQUATION(dimSize=dimSize, left=e1, right=e2, source=source, attr=eqAttr, recordSize=recordSize)
equation
(e1_1, funcs) = differentiateExp(e1, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, defaultMaxIter);
(e1_1, _) = ExpressionSimplify.simplify(e1_1);
(e2_1, funcs) = differentiateExp(e2, inDiffwrtCref, inInputData, inDiffType, funcs, defaultMaxIter);
(e2_1, _) = ExpressionSimplify.simplify(e2_1);
op1 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e1, e1_1);
op2 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e2, e2_1);
source = List.foldr({op1, op2}, ElementSource.addSymbolicTransformation, source);
then
(BackendDAE.ARRAY_EQUATION(dimSize, e1_1, e2_1, source, eqAttr, recordSize), funcs);
// differentiate algorithm
case BackendDAE.ALGORITHM(size=size, alg=DAE.ALGORITHM_STMTS(statementLst=statementLst), source=source, expand=expand, attr=eqAttr)
equation
// get Allgorithm
(statementLst, funcs) = differentiateStatements(statementLst, inDiffwrtCref, inInputData, inDiffType, {}, inFunctionTree, defaultMaxIter);
alg = DAE.ALGORITHM_STMTS(statementLst);
//op1 = DAE.OP_DIFFERENTIATE(cr, before, after)
//op1 = DAE.OP_DIFFERENTIATE(inDiffwrtCref, e1, e2);
//source = ElementSource.addSymbolicTransformation(source, op1);
then
(BackendDAE.ALGORITHM(size, alg, source, expand, eqAttr), funcs);
// if-equations
case BackendDAE.IF_EQUATION(conditions=expExpLst, eqnstrue=eqnslst, eqnsfalse=eqns, source=source, attr=eqAttr)
equation
(eqnslst, funcs) = differentiateEquationsLst(eqnslst, inDiffwrtCref, inInputData, inDiffType, {}, inFunctionTree);
(eqns, funcs) = differentiateEquations(eqns, inDiffwrtCref, inInputData, inDiffType, {}, funcs);
then
(BackendDAE.IF_EQUATION(expExpLst, eqnslst, eqns, source, eqAttr), funcs);
case BackendDAE.WHEN_EQUATION(size=size, whenEquation=whenEqn, source=source, attr=eqAttr)
equation
(whenEqn, funcs) = differentiateWhenEquations(whenEqn, inDiffwrtCref, inInputData, inDiffType, inFunctionTree);
then
(BackendDAE.WHEN_EQUATION(size, whenEqn, source, eqAttr), funcs);
else equation
Error.addSourceMessage(Error.NON_EXISTING_DERIVATIVE, {BackendDump.equationString(inEquation), ComponentReference.crefStr(inDiffwrtCref)}, sourceInfo());
then fail();
end match;
// Debug dump
if Flags.isSet(Flags.DEBUG_DIFFERENTIATION) then
BackendDump.debugStrEqnStr("### Result of differentiateEquation\n --> ", outEquation,"\n");
end if;
end differentiateEquationFragile;
protected function differentiateEquations
"Differentiates an equation with respect to a cref."
input list<BackendDAE.Equation> inEquations;
input DAE.ComponentRef inDiffwrtCref;
input BackendDAE.DifferentiateInputData inInputData;
input BackendDAE.DifferentiationType inDiffType;
input list<BackendDAE.Equation> inEquationsAccum;
input DAE.FunctionTree inFunctionTree;
output list<BackendDAE.Equation> outEquations;
output DAE.FunctionTree outFunctionTree;
algorithm
(outEquations,outFunctionTree) := matchcontinue (inEquations)
local
DAE.FunctionTree funcs;
list<BackendDAE.Equation> rest, eqns;
BackendDAE.Equation eqn;
case {} then (listReverse(inEquationsAccum), inFunctionTree);
// equations
case eqn::rest
equation
(eqn, funcs) = differentiateEquation(eqn, inDiffwrtCref, inInputData, inDiffType, inFunctionTree);
eqns = eqn::inEquationsAccum;
(eqns, funcs) = differentiateEquations(rest, inDiffwrtCref, inInputData, inDiffType, eqns, funcs);
then (eqns, funcs);
case eqn::_
equation
Error.addSourceMessage(Error.NON_EXISTING_DERIVATIVE, {BackendDump.equationString(eqn), ComponentReference.crefStr(inDiffwrtCref)}, sourceInfo());
then
fail();
end matchcontinue;
end differentiateEquations;
protected function differentiateEquationsLst
"Differentiates a list of an equation list with respect to a cref.
Helper function to differentiate a IF-EQUATION."
input list<list<BackendDAE.Equation>> inEquationsLst;
input DAE.ComponentRef inDiffwrtCref;
input BackendDAE.DifferentiateInputData inInputData;
input BackendDAE.DifferentiationType inDiffType;
input list<list<BackendDAE.Equation>> inEquationsLstAccum;
input DAE.FunctionTree inFunctionTree;
output list<list<BackendDAE.Equation>> outEquationsLst;
output DAE.FunctionTree outFunctionTree;
algorithm
(outEquationsLst, outFunctionTree) := matchcontinue inEquationsLst
local
DAE.FunctionTree funcs;
list<list<BackendDAE.Equation>> rest, eqnsLst;
list<BackendDAE.Equation> eqns;
String msg;
DAE.ElementSource source;
case {} then (listReverse(inEquationsLstAccum), inFunctionTree);
// equations
case eqns::rest
equation
(eqns, funcs) = differentiateEquations(eqns, inDiffwrtCref, inInputData, inDiffType, {}, inFunctionTree);
eqnsLst = eqns::inEquationsLstAccum;
(eqnsLst, funcs) = differentiateEquationsLst(rest, inDiffwrtCref, inInputData, inDiffType, eqnsLst, funcs);
then (eqnsLst, funcs);
case eqns::_
equation
Error.addSourceMessage(Error.NON_EXISTING_DERIVATIVE, {BackendDump.equationListString(eqns, "equation list"), ComponentReference.crefStr(inDiffwrtCref)}, sourceInfo());
then
fail();
end matchcontinue;
end differentiateEquationsLst;
protected function differentiateWhenEquations
"Differentiates a when equation with respect to a cref."
input BackendDAE.WhenEquation inWhenEquations;
input DAE.ComponentRef inDiffwrtCref;
input BackendDAE.DifferentiateInputData inInputData;
input BackendDAE.DifferentiationType inDiffType;
input DAE.FunctionTree inFunctionTree;
output BackendDAE.WhenEquation outWhenEquations;
output DAE.FunctionTree outFunctionTree;
protected
BackendDAE.WhenEquation elsewhenPart, delsewhenPart;
Option<BackendDAE.WhenEquation> oelsepart;
list<BackendDAE.WhenOperator> whenStmtLst, stmtLst;
DAE.FunctionTree funcs;
DAE.Exp condition;
algorithm
BackendDAE.WHEN_STMTS(condition = condition, whenStmtLst = whenStmtLst, elsewhenPart = oelsepart) := inWhenEquations;
funcs := inFunctionTree;
stmtLst := {};
for rs in whenStmtLst loop
rs := match(rs)
local
DAE.ElementSource src;
DAE.Exp right, dright, eleft, dleft;
case BackendDAE.ASSIGN(eleft, right, src) equation
(dleft, funcs) = differentiateExp(eleft, inDiffwrtCref, inInputData, inDiffType, funcs, defaultMaxIter);
(dright, funcs) = differentiateExp(right, inDiffwrtCref, inInputData, inDiffType, funcs, defaultMaxIter);
then BackendDAE.ASSIGN(dleft, dright, src);
else rs;
end match;
stmtLst := rs::stmtLst;
end for;
if isSome(oelsepart) then
SOME(elsewhenPart) := oelsepart;
(delsewhenPart, funcs) := differentiateWhenEquations(elsewhenPart, inDiffwrtCref, inInputData, inDiffType, funcs);
oelsepart := SOME(delsewhenPart);
else
oelsepart := NONE();
end if;
outWhenEquations := BackendDAE.WHEN_STMTS(condition, stmtLst, oelsepart);
outFunctionTree := funcs;
end differentiateWhenEquations;
// =============================================================================
// main differentiation functions
// - differentiateExp
// - differentiateStatements
//
// =============================================================================
protected function differentiateExp
input DAE.Exp inExp;
input DAE.ComponentRef inDiffwrtCref;
input BackendDAE.DifferentiateInputData inInputData;
input BackendDAE.DifferentiationType inDiffType;
input DAE.FunctionTree inFunctionTree;
input Integer maxIter;
output DAE.Exp outDiffedExp;
output DAE.FunctionTree outFunctionTree;
protected
constant Boolean debug = false;
algorithm
if debug then print("\nDifferentiate Exp: "+ExpressionDump.printExpStr(inExp)+
" w.r.t. "+ComponentReference.printComponentRefStr(inDiffwrtCref)+"\n"); end if;
/*
// This check does not seem to be necessary since looking through the stack of expression seems to stop iteration in most cases, and you get a spam of messages from this check.
if maxIter < 1 then
Error.addInternalError("Differentiation reached maximum number of iterations ("+String(defaultMaxIter)+"). Current expression is: " + ExpressionDump.printExpStr(inExp) + " w.r.t. " + ComponentReference.printComponentRefStr(inDiffwrtCref), sourceInfo());
fail();
end if;
*/
(outDiffedExp, outFunctionTree) := match inExp
local
Absyn.Path p, p1, p2;
Boolean b;
DAE.CallAttributes attr;
DAE.Exp e1, e2, e3, actual, simplified, lambda;
DAE.Exp res, res1, res2;
DAE.FunctionTree functionTree;
DAE.Operator op;
DAE.Type tp;
Integer i;
String s1, s2, stp;
list<String> strLst;
list<DAE.Var> varLst;
//String se1;
list<DAE.Exp> sub, expl;
list<list<DAE.Exp>> matrix, dmatrix;
DAE.ComponentRef cref;
// types that are not differentiated
case DAE.SCONST() then (inExp, inFunctionTree);
case DAE.BCONST() then (inExp, inFunctionTree);
case DAE.CLKCONST() then (inExp, inFunctionTree);
case DAE.ENUM_LITERAL() then (inExp, inFunctionTree);
// constants => results in zero
case DAE.ICONST() then (DAE.ICONST(0), inFunctionTree);
case DAE.RCONST() then (DAE.RCONST(0.0), inFunctionTree);
case DAE.CREF(componentRef=cref, ty=tp) algorithm
if ComponentReference.isStartCref(cref) then
// differentiate start value
res := Expression.makeConstZero(tp);
functionTree := inFunctionTree;
else
(res, functionTree) := differentiateCrefs(inExp, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
end if;
then (res, functionTree);
case DAE.BINARY() algorithm
(res, functionTree) := differentiateBinary(inExp, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
res := ExpressionSimplify.simplifyBinaryExp(res);
then (res, functionTree);
case DAE.UNARY(operator=op, exp=e1) algorithm
(res, functionTree) := differentiateExp(e1, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
res := DAE.UNARY(op, res);
res := ExpressionSimplify.simplifyUnaryExp(res);
then (res, functionTree);
// boolean expression, e.g. relation, are left as they are
case DAE.LBINARY() then (inExp, inFunctionTree);
case DAE.LUNARY() then (inExp, inFunctionTree);
case DAE.RELATION() then (inExp, inFunctionTree);
case DAE.IFEXP(expCond=e1, expThen=e2, expElse=e3) algorithm
(res1, functionTree) := differentiateExp(e2, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
(res2, functionTree) := differentiateExp(e3, inDiffwrtCref, inInputData, inDiffType, functionTree, maxIter-1);
res := DAE.IFEXP(e1, res1, res2);
(res, _) := ExpressionSimplify.simplify1(res);
then (res, functionTree);
// differentiate homotopy
case DAE.CALL(path=p as Absyn.IDENT(name="homotopy"), expLst={actual, simplified}, attr=attr) algorithm
lambda := Expression.crefExp(ComponentReference.makeCrefIdent(BackendDAE.homotopyLambda, DAE.T_REAL_DEFAULT, {}));
(e1, functionTree) := differentiateExp(actual, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter);
(e2, functionTree) := differentiateExp(simplified, inDiffwrtCref, inInputData, inDiffType, functionTree, maxIter);
e3 := DAE.BINARY(
DAE.BINARY(lambda, DAE.MUL(DAE.T_REAL_DEFAULT), e1), /* lambda*e1 */
DAE.ADD(DAE.T_REAL_DEFAULT), /* + */
DAE.BINARY(DAE.BINARY(DAE.RCONST(1.0),DAE.SUB(DAE.T_REAL_DEFAULT),lambda), DAE.MUL(DAE.T_REAL_DEFAULT), e2) /* (lambda-1)*e2*/
);
then (e3, functionTree);
/*
do not differentiate semiLinear, if the second or third expression contains the diff cref
ticket: #5595
*/
case DAE.CALL(path=p as Absyn.IDENT(name="semiLinear"), expLst={e1, e2, e3}, attr=attr)
guard(Expression.expHasCref(e2, inDiffwrtCref) or Expression.expHasCref(e3, inDiffwrtCref))
then fail();
// differentiate call
case DAE.CALL() algorithm
(res, functionTree) := differentiateCalls(inExp, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
(res, _) := ExpressionSimplify.simplify1(res);
then (res, functionTree);
case DAE.RECORD(path = p, exps = expl, comp = strLst, ty=tp) algorithm
sub := {};
functionTree := inFunctionTree;
for e in expl loop
(e1, functionTree) := differentiateExp(e, inDiffwrtCref, inInputData, inDiffType, functionTree, maxIter);
sub := e1 :: sub;
end for;
then (DAE.RECORD(p, listReverse(sub), strLst, tp), functionTree);
case DAE.ARRAY(ty=tp, scalar=b, array=expl) algorithm
(expl, functionTree) := List.map3Fold(expl, function differentiateExp(maxIter=maxIter-1), inDiffwrtCref, inInputData, inDiffType, inFunctionTree);
res := DAE.ARRAY(tp, b, expl);
(res, _) := ExpressionSimplify.simplify1(res);
then (res, functionTree);
case DAE.MATRIX(ty=tp, integer=i, matrix=matrix) algorithm
(dmatrix, functionTree) := List.map3FoldList(matrix, function differentiateExp(maxIter=maxIter-1), inDiffwrtCref, inInputData, inDiffType, inFunctionTree);
res := DAE.MATRIX(tp, i, dmatrix);
(res, _) := ExpressionSimplify.simplify1(res);
then (res, functionTree);
case DAE.RANGE() then (inExp, inFunctionTree);
case DAE.TUPLE(PR=expl) algorithm
(expl, functionTree) := List.map3Fold(expl, function differentiateExp(maxIter=maxIter-1), inDiffwrtCref, inInputData, inDiffType, inFunctionTree);
res := DAE.TUPLE(expl);
(res, _) := ExpressionSimplify.simplify1(res);
then (res, functionTree);
case DAE.CAST(ty=tp, exp=e1) algorithm
(res, functionTree) := differentiateExp(e1, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
(res, _) := ExpressionSimplify.simplify1(res);
then (DAE.CAST(tp, res), functionTree);
case DAE.ASUB(exp=e1, sub=sub) algorithm
(res1, functionTree) := differentiateExp(e1, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
res := Expression.makeASUB(res1,sub);
(res, _) := ExpressionSimplify.simplify1(res);
then (res, functionTree);
case DAE.TSUB(exp=e1, ix=i, ty=tp)
algorithm
(res1, functionTree) := differentiateExp(e1, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
if not referenceEq(e1, res1) then
res := DAE.TSUB(res1, i, tp);
(res,_) := ExpressionSimplify.simplify1(res);
else
res := inExp;
end if;
then (res, functionTree);
case e1 as DAE.RSUB()
algorithm
// Try simplifying first.
(res, b) := ExpressionSimplify.simplify(e1);
if b then
(res, functionTree) := differentiateExp(res, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
else
(res1, functionTree) := differentiateExp(e1.exp, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
// This might not be needed anymore. If it is simplifiable
// Then it would have been simplified above.
if not referenceEq(e1.exp, res1) then
try
(expl, strLst) := match res1
case DAE.RECORD(exps=expl,comp=strLst) then (expl, strLst);
case DAE.CALL(path=p1,expLst=expl,attr=DAE.CALL_ATTR(ty=DAE.T_COMPLEX(complexClassType=ClassInf.RECORD(path=p2), varLst=varLst)))
guard AbsynUtil.pathEqual(p1,p2)
then (expl, list(v.name for v in varLst));
end match;
res := listGet(expl, List.position1OnTrue(strLst, stringEq, e1.fieldName));
else
e1.exp := res1;
(res,_) := ExpressionSimplify.simplify1(e1);
end try;
end if;
end if;
then (res, functionTree);
case DAE.SIZE() then (inExp, inFunctionTree);
case DAE.REDUCTION()
algorithm
(res1, functionTree) := differentiateExp(inExp.expr, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter-1);
if not referenceEq(inExp.expr, res1) then
res := DAE.REDUCTION(inExp.reductionInfo, res1, inExp.iterators);
res := ExpressionSimplify.simplify1(res);
else
res := inExp;
end if;
then
(res, functionTree);
else equation
true = Flags.isSet(Flags.FAILTRACE);
s1 = ExpressionDump.printExpStr(inExp);
s2 = ComponentReference.printComponentRefStr(inDiffwrtCref);
stp = Types.printTypeStr(Expression.typeof(inExp));
Debug.trace("- differentiateExp " + s1 + " type: " + stp + " w.r.t " + s2 + " failed\n");
then fail();
end match;
if debug then print("Differentiate-Exp-result: " + ExpressionDump.printExpStr(outDiffedExp) + "\n"); end if;
end differentiateExp;
protected function differentiateStatements
input list<DAE.Statement> inStmts;
input DAE.ComponentRef inDiffwrtCref;
input BackendDAE.DifferentiateInputData inInputData;
input BackendDAE.DifferentiationType inDiffType;
input list<DAE.Statement> inStmtsAccum;
input DAE.FunctionTree inFunctionTree;
input Integer maxIter;
output list<DAE.Statement> outDiffedStmts;
output DAE.FunctionTree outFunctionTree;
algorithm
(outDiffedStmts, outFunctionTree) := matchcontinue inStmts
local
DAE.ComponentRef cref;
DAE.ElementSource source;
DAE.Exp lhs, rhs, derivedLHS, derivedRHS;
DAE.FunctionTree functions;
DAE.Statement currStatement, stmt, dstmt;
DAE.Type type_;
BackendDAE.DifferentiateInputData inputData;
BackendDAE.Var controlVar;
Boolean iterIsArray,initialCall;
DAE.Ident ident;
DAE.Exp exp;
DAE.Exp elseif_exp;
DAE.Else elseif_else_;
list<DAE.Exp> expLst, dexpLst, expLstRHS;
list<tuple<DAE.Exp, DAE.Exp>> exptl;
list<DAE.Statement> statementLst, restStatements, derivedStatements1, derivedStatements2, else_statementLst, elseif_statementLst;
String s1,s2;
list<Option<DAE.Statement>> optDerivedStatements1;
case {} then (listReverse(inStmtsAccum), inFunctionTree);
case (currStatement as DAE.STMT_ASSIGN(type_=type_, exp1=lhs, exp=rhs, source=source))::restStatements
equation
(derivedLHS, functions) = differentiateExp(lhs, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter);
(derivedRHS, functions) = differentiateExp(rhs, inDiffwrtCref, inInputData, inDiffType, functions, maxIter);
(derivedRHS,_) = ExpressionSimplify.simplify(derivedRHS);
/* if assigment is empty remove derived assignment */
if (Expression.isZero(derivedLHS)) then
derivedStatements1 = {currStatement};
else
derivedStatements1 = {DAE.STMT_ASSIGN(type_, derivedLHS, derivedRHS, source), currStatement};
end if;
derivedStatements2 = listAppend(derivedStatements1, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements2, functions, maxIter);
then (derivedStatements2, functions);
case (currStatement as DAE.STMT_TUPLE_ASSIGN(expExpLst= expLst, exp=rhs, source=source))::restStatements
equation
(dexpLst,functions) = List.map3Fold(expLst, function differentiateExp(maxIter=maxIter), inDiffwrtCref, inInputData, inDiffType, inFunctionTree);
(derivedRHS as DAE.TUPLE(expLstRHS), functions) = differentiateExp(rhs, inDiffwrtCref, inInputData, inDiffType, functions, maxIter);
(DAE.TUPLE(expLstRHS),_) = ExpressionSimplify.simplify(derivedRHS);
exptl = List.zip(dexpLst, expLstRHS);
optDerivedStatements1 = List.map2(exptl, makeAssignmentfromTuple, source, inFunctionTree);
derivedStatements1 = List.flatten(List.map(optDerivedStatements1, List.fromOption));
derivedStatements2 = listAppend(derivedStatements1, {currStatement});
derivedStatements1 = listAppend(derivedStatements2, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements1, functions, maxIter);
then (derivedStatements2, functions);
case (currStatement as DAE.STMT_TUPLE_ASSIGN(expExpLst=expLst, exp=rhs as DAE.CALL(), type_= type_, source=source))::restStatements
equation
(dexpLst,functions) = List.map3Fold(expLst, function differentiateExp(maxIter=maxIter), inDiffwrtCref, inInputData, inDiffType, inFunctionTree);
(derivedRHS as DAE.CALL(attr=DAE.CALL_ATTR(ty=type_)), functions) = differentiateExp(rhs, inDiffwrtCref, inInputData, inDiffType, functions, maxIter);
optDerivedStatements1 = {SOME(DAE.STMT_TUPLE_ASSIGN(type_, dexpLst, derivedRHS, source))};
derivedStatements1 = List.flatten(List.map(optDerivedStatements1, List.fromOption));
derivedStatements2 = listAppend(derivedStatements1, {currStatement});
derivedStatements1 = listAppend(derivedStatements2, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements1, functions, maxIter);
then (derivedStatements2, functions);
case (currStatement as DAE.STMT_ASSIGN_ARR(lhs=lhs, exp=rhs, type_=type_, source=source))::restStatements
equation
(derivedLHS, functions) = differentiateExp(lhs, inDiffwrtCref, inInputData, inDiffType, inFunctionTree, maxIter);
(derivedRHS, functions) = differentiateExp(rhs, inDiffwrtCref, inInputData, inDiffType, functions, maxIter);
(derivedRHS,_) = ExpressionSimplify.simplify(derivedRHS);
derivedStatements1 = {DAE.STMT_ASSIGN_ARR(type_, derivedLHS, derivedRHS, source), currStatement};
derivedStatements2 = listAppend(derivedStatements1, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements2, functions, maxIter);
then (derivedStatements2, functions);
case DAE.STMT_FOR(type_=type_, iterIsArray=iterIsArray, iter=ident, range=exp, statementLst=statementLst, source=source)::restStatements
equation
cref = ComponentReference.makeCrefIdent(ident, DAE.T_INTEGER_DEFAULT, {});
controlVar = BackendDAE.VAR(cref, BackendDAE.DISCRETE(), DAE.BIDIR(), DAE.NON_PARALLEL(), DAE.T_REAL_DEFAULT, NONE(), NONE(), {}, DAE.emptyElementSource, NONE(), NONE(), NONE(), NONE(), DAE.NON_CONNECTOR(), DAE.NOT_INNER_OUTER(), false,false);
inputData = addGlobalVars({controlVar}, inInputData);
(derivedStatements1, functions) = differentiateStatements(statementLst, inDiffwrtCref, inputData, inDiffType, {}, inFunctionTree, maxIter);
derivedStatements1 = {DAE.STMT_FOR(type_, iterIsArray, ident, exp, derivedStatements1, source)};
derivedStatements2 = listAppend(derivedStatements1, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements2, functions, maxIter);
then (derivedStatements2, functions);
case DAE.STMT_IF(exp=exp, statementLst=statementLst, else_=DAE.NOELSE(), source=source)::restStatements
equation
(derivedStatements1, functions) = differentiateStatements(statementLst, inDiffwrtCref, inInputData, inDiffType, {}, inFunctionTree, maxIter);
derivedStatements1 = {DAE.STMT_IF(exp, derivedStatements1, DAE.NOELSE(), source)};
derivedStatements2 = listAppend(derivedStatements1, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements2, functions, maxIter);
then (derivedStatements2, functions);
case DAE.STMT_IF(exp=exp, statementLst=statementLst, else_=DAE.ELSEIF(exp=elseif_exp, statementLst=elseif_statementLst, else_=elseif_else_), source=source)::restStatements
equation
(derivedStatements1, functions) = differentiateStatements(statementLst, inDiffwrtCref, inInputData, inDiffType, {}, inFunctionTree, maxIter);
(derivedStatements2, functions) = differentiateStatements({DAE.STMT_IF(elseif_exp, elseif_statementLst, elseif_else_, source)}, inDiffwrtCref, inInputData, inDiffType, {}, functions, maxIter);
derivedStatements1 = {DAE.STMT_IF(exp, derivedStatements1, DAE.ELSE(derivedStatements2), source)};
derivedStatements2 = listAppend(derivedStatements1, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements2, functions, maxIter);
then (derivedStatements2, functions);
case DAE.STMT_IF(exp=exp, statementLst=statementLst, else_=DAE.ELSE(statementLst=else_statementLst), source=source)::restStatements
equation
(derivedStatements1, functions) = differentiateStatements(statementLst, inDiffwrtCref, inInputData, inDiffType, {}, inFunctionTree, maxIter);
(derivedStatements2, functions) = differentiateStatements(else_statementLst, inDiffwrtCref, inInputData, inDiffType, {}, functions, maxIter);
derivedStatements1 = {DAE.STMT_IF(exp, derivedStatements1, DAE.ELSE(derivedStatements2), source)};
derivedStatements2 = listAppend(derivedStatements1, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements2, functions, maxIter);
then (derivedStatements2, functions);
case DAE.STMT_WHILE(exp=exp, statementLst=statementLst, source=source)::restStatements
equation
(derivedStatements1, functions) = differentiateStatements(statementLst, inDiffwrtCref, inInputData, inDiffType, {}, inFunctionTree, maxIter);
derivedStatements1 = {DAE.STMT_WHILE(exp, derivedStatements1, source)};
derivedStatements2 = listAppend(derivedStatements1, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements2, functions, maxIter);
then (derivedStatements2, functions);
case DAE.STMT_WHEN(exp=exp, initialCall=initialCall, statementLst=statementLst, elseWhen= NONE(), source=source)::restStatements
equation
(derivedStatements1, functions) = differentiateStatements(statementLst, inDiffwrtCref, inInputData, inDiffType, {}, inFunctionTree, maxIter);
derivedStatements1 = {DAE.STMT_WHEN(exp, {}, initialCall, derivedStatements1, NONE(), source)};
derivedStatements2 = listAppend(derivedStatements1, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements2, functions, maxIter);
then (derivedStatements2, functions);
case DAE.STMT_WHEN(exp=exp, initialCall=initialCall, statementLst=statementLst, elseWhen= SOME(stmt), source=source)::restStatements
equation
(derivedStatements1, functions) = differentiateStatements(statementLst, inDiffwrtCref, inInputData, inDiffType, {}, inFunctionTree, maxIter);
({dstmt}, functions) = differentiateStatements({stmt}, inDiffwrtCref, inInputData, inDiffType, {}, functions, maxIter);
derivedStatements1 = {DAE.STMT_WHEN(exp, {}, initialCall, derivedStatements1, SOME(dstmt), source)};
derivedStatements2 = listAppend(derivedStatements1, inStmtsAccum);
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements2, functions, maxIter);
then (derivedStatements2, functions);
case (DAE.STMT_ASSERT())::restStatements
equation
(derivedStatements1, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, inStmtsAccum, inFunctionTree, maxIter);
then (derivedStatements1, functions);
case (currStatement as DAE.STMT_TERMINATE())::restStatements
equation
derivedStatements1 = currStatement::inStmtsAccum;
(derivedStatements2, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements1, inFunctionTree, maxIter);
then (derivedStatements2, functions);
case (currStatement as DAE.STMT_REINIT())::restStatements
equation
derivedStatements1 = currStatement::inStmtsAccum;
(derivedStatements1, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements1, inFunctionTree, maxIter);
then (derivedStatements1, functions);
case (currStatement as DAE.STMT_NORETCALL())::restStatements
equation
derivedStatements1 = currStatement::inStmtsAccum;
(derivedStatements1, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements1, inFunctionTree, maxIter);
then (derivedStatements1, functions);
case (currStatement as DAE.STMT_RETURN())::restStatements
equation
derivedStatements1 = currStatement::inStmtsAccum;
(derivedStatements1, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements1, inFunctionTree, maxIter);
then (derivedStatements1, functions);
case (currStatement as DAE.STMT_BREAK())::restStatements
equation
derivedStatements1 = currStatement::inStmtsAccum;
(derivedStatements1, functions) = differentiateStatements(restStatements, inDiffwrtCref, inInputData, inDiffType, derivedStatements1, inFunctionTree, maxIter);
then (derivedStatements1, functions);
else
equation
if Flags.isSet(Flags.FAILTRACE) then
(currStatement::_) = inStmts;
s1 = DAEDump.ppStatementStr(currStatement);
s2 = ComponentReference.printComponentRefStr(inDiffwrtCref);
Debug.trace("- differentiateStatements " + s1 + " w.r.t: " + s2 + " failed\n");
end if;
then fail();
end matchcontinue;
end differentiateStatements;
protected function isDiscreteAssignStatment
input DAE.Statement inStmt;
output Boolean out;
algorithm
out := match (inStmt)
local
DAE.Type tp;
case DAE.STMT_ASSIGN(type_= tp)
then Types.isDiscreteType(tp);
case DAE.STMT_ASSIGN_ARR(type_= tp)
then Types.isDiscreteType(tp);
case DAE.STMT_TUPLE_ASSIGN(type_= tp)
then Types.isDiscreteType(tp);
else false;
end match;
end isDiscreteAssignStatment;
protected function makeAssignmentfromTuple
"Help function for differentiateStatements"
input tuple<DAE.Exp, DAE.Exp> inTpl;
input DAE.ElementSource source;
input DAE.FunctionTree inFunctionTree;
output Option<DAE.Statement> outStmt;
algorithm
outStmt := match(inTpl)
local
DAE.Exp e1, e2;
DAE.Type tp;
case ((e1 as DAE.CREF(ty=tp), e2))
then SOME(DAE.STMT_ASSIGN(tp, e1, e2, source));
case ((e1 as DAE.CALL(), e2)) guard( Expression.isRecordCall(e1, inFunctionTree))
equation
tp = Expression.typeof(e1);
then SOME(DAE.STMT_ASSIGN(tp, e1, e2, source));