Examples with ReachingDefinitionsDfaInstance org.jetbrains.plugins.groovy.lang.psi.dataFlow.reachingDefs.ReachingDefinitionsDfaInstance used on opensource projects

Example 1 with ReachingDefinitionsDfaInstance

use of org.jetbrains.plugins.groovy.lang.psi.dataFlow.reachingDefs.ReachingDefinitionsDfaInstance in project intellij-community by JetBrains.

the class UnusedDefInspection method check.

@Override
protected void check(@NotNull final GrControlFlowOwner owner, @NotNull final ProblemsHolder problemsHolder) {
    final Instruction[] flow = owner.getControlFlow();
    final ReachingDefinitionsDfaInstance dfaInstance = new ReachingDefinitionsDfaInstance(flow);
    final ReachingDefinitionsSemilattice lattice = new ReachingDefinitionsSemilattice();
    final DFAEngine<DefinitionMap> engine = new DFAEngine<>(flow, dfaInstance, lattice);
    final List<DefinitionMap> dfaResult = engine.performDFAWithTimeout();
    if (dfaResult == null) {
        return;
    }
    final TIntHashSet unusedDefs = new TIntHashSet();
    for (Instruction instruction : flow) {
        if (instruction instanceof ReadWriteVariableInstruction && ((ReadWriteVariableInstruction) instruction).isWrite()) {
            unusedDefs.add(instruction.num());
        }
    }
    for (int i = 0; i < dfaResult.size(); i++) {
        final Instruction instruction = flow[i];
        if (instruction instanceof ReadWriteVariableInstruction) {
            final ReadWriteVariableInstruction varInst = (ReadWriteVariableInstruction) instruction;
            if (!varInst.isWrite()) {
                final String varName = varInst.getVariableName();
                DefinitionMap e = dfaResult.get(i);
                e.forEachValue(new TObjectProcedure<TIntHashSet>() {

                    @Override
                    public boolean execute(TIntHashSet reaching) {
                        reaching.forEach(new TIntProcedure() {

                            @Override
                            public boolean execute(int defNum) {
                                final String defName = ((ReadWriteVariableInstruction) flow[defNum]).getVariableName();
                                if (varName.equals(defName)) {
                                    unusedDefs.remove(defNum);
                                }
                                return true;
                            }
                        });
                        return true;
                    }
                });
            }
        }
    }
    final Set<PsiElement> checked = ContainerUtil.newHashSet();
    unusedDefs.forEach(new TIntProcedure() {

        @Override
        public boolean execute(int num) {
            final ReadWriteVariableInstruction instruction = (ReadWriteVariableInstruction) flow[num];
            final PsiElement element = instruction.getElement();
            process(element, checked, problemsHolder, GroovyInspectionBundle.message("unused.assignment.tooltip"));
            return true;
        }
    });
    owner.accept(new GroovyRecursiveElementVisitor() {

        @Override
        public void visitVariable(@NotNull GrVariable variable) {
            if (checked.contains(variable) || variable.getInitializerGroovy() != null)
                return;
            if (ReferencesSearch.search(variable, variable.getUseScope()).findFirst() == null) {
                process(variable, checked, problemsHolder, GroovyInspectionBundle.message("unused.variable"));
            }
        }
    });
}