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I have a project in the STM32CubeIDE which is built upon Eclipse and the Eclipse CDT. I have been fighting problems in the indexer where certain files are not being indexed correctly. The code compiles without issue, it is only the CDT indexer which has problems. I can (possibly) trace the "problem" down to something to do with using constexpr. Upon running eclipse in debug mode, I found (as an example) this exception being generated. Indexer: parsing \2-Wire AV Base\avbase\src\tw\avbase\strobe\StrobeSubsystem.cpp [1,650,308,159,184] Parsed StrobeSubsystem.cpp: 13 ms. Ambiguity resolution: 3 ms Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(33); A template id provides illegal arguments for the instantiation: gpio_output_t Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(33); Attempt to use symbol failed: LEDS_RED_PORTPIN_T Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(35); A template id provides illegal arguments for the instantiation: gpio_output_t Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(35); Attempt to use symbol failed: LEDS_GREEN_PORTPIN_T Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(41); A template id provides illegal arguments for the instantiation: gpio_output_t Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(41); Attempt to use symbol failed: WATCHDOG_KICK_PORTPIN_T Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(47); A template id provides illegal arguments for the instantiation: UARTDriverConfigType Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(48); Attempt to use symbol failed: CONFIG_NETWORK_ST8500_UART_T Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(49); Attempt to use symbol failed: CONFIG_NETWORK_ST8500_UART_RX_DMA_CHANNEL_T Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(50); Attempt to use symbol failed: CONFIG_NETWORK_ST8500_UART_TX_DMA_CHANNEL_T Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(51); Attempt to use symbol failed: CONFIG_NETWORK_ST8500_UART_RX_PORTPIN_T Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(52); Attempt to use symbol failed: CONFIG_NETWORK_ST8500_UART_TX_PORTPIN_T Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\_bsp.h(56); A template id provides illegal arguments for the instantiation: UARTDriver Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\strobe\StrobeSubsystem.h(39); A template id provides illegal arguments for the instantiation: Pack Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\strobe\StrobeSubsystem.h(40); A template id provides illegal arguments for the instantiation: reference_wrapper Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\strobe\StrobeSubsystem.h(46); A template id provides illegal arguments for the instantiation: reference_wrapper Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\strobe\StrobeSubsystem.h(60); A template id provides illegal arguments for the instantiation: GPIOOutputDriver Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\include\tw\avbase\strobe\StrobeSubsystem.h(60); Attempt to use symbol failed: CONFIG_STROBE_ENABLE_PORTPIN_T Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\src\tw\avbase\strobe\StrobeSubsystem.cpp(25); A template id provides illegal arguments for the instantiation: reference_wrapper Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\src\tw\avbase\strobe\StrobeSubsystem.cpp(29); Attempt to use symbol failed: CONFIG_STROBE_ENABLE_GPIOCONFIGURATION Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\src\tw\avbase\strobe\StrobeSubsystem.cpp(30); Attempt to use symbol failed: Strobe Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\src\tw\avbase\strobe\StrobeSubsystem.cpp(58); Attempt to use symbol failed: control Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\src\tw\avbase\strobe\StrobeSubsystem.cpp(68); Attempt to use symbol failed: control Indexer: unresolved name at C:\Users\h321355\Documents\2WireAV\avbasestm32copy\avbase\src\tw\avbase\strobe\StrobeSubsystem.cpp(75); Attempt to use symbol failed: control Indexer: exception: java.lang.UnsupportedOperationException at org.eclipse.cdt.internal.core.dom.parser.IntegralValue$1.setSubValue(IntegralValue.java:47) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalCompositeAccess.update(EvalCompositeAccess.java:53) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalReference.update(EvalReference.java:122) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalBinary.computeForFunctionCall(EvalBinary.java:499) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecExpressionStatement.executeForFunctionCall(ExecExpressionStatement.java:39) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalUtil.executeStatement(EvalUtil.java:87) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecCompoundStatement.executeForFunctionCall(ExecCompoundStatement.java:63) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalFunctionCall.evaluateFunctionBody(EvalFunctionCall.java:350) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalFunctionCall.computeForFunctionCall(EvalFunctionCall.java:316) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecExpressionStatement.executeForFunctionCall(ExecExpressionStatement.java:39) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalUtil.executeStatement(EvalUtil.java:87) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.ExecCompoundStatement.executeForFunctionCall(ExecCompoundStatement.java:63) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalFunctionCall.evaluateFunctionBody(EvalFunctionCall.java:350) at org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalFunctionCall.getValue(EvalFunctionCall.java:187) at org.eclipse.cdt.internal.core.dom.parser.cpp.CPPVariable.computeInitialValue(CPPVariable.java:271) at org.eclipse.cdt.internal.core.dom.parser.cpp.CPPVariable.getInitialValue(CPPVariable.java:248) at org.eclipse.cdt.internal.core.pdom.PDOMWriter.resolveNames(PDOMWriter.java:441) at org.eclipse.cdt.internal.core.pdom.PDOMWriter.addSymbols(PDOMWriter.java:284) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.writeToIndex(AbstractIndexerTask.java:1295) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.parseFile(AbstractIndexerTask.java:1107) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.parseLinkage(AbstractIndexerTask.java:944) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.runTask(AbstractIndexerTask.java:572) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMIndexerTask.run(PDOMIndexerTask.java:164) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMUpdateTask.run(PDOMUpdateTask.java:96) at org.eclipse.cdt.internal.core.pdom.PDOMIndexerJob.run(PDOMIndexerJob.java:160) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Where, the file in question will have an error in the indexer log output like: "Unresolved includes (from headers in index):" However, by simply commenting out a line of code that has a constexpr (no changes to the include structure or paths), this message goes away and no exception is generated. Unfortunately, I cannot seem to create a minimum reproducible error. I am only speculating as to the cause.
Hi @Patrick, Thanks for the bug report. Your conclusion looks sound, this looks like an issue in the constexpr function support, initially added in Bug 490475. Are you using C++14, 17 or other? The C++17 support is incomplete in CDT.
@Jonah Graham, I am using C++17.
(In reply to Patrick Wright from comment #2) > @Jonah Graham, > > I am using C++17. Thanks for coming back to me on this. The reality is that there is no significant active development on support C++17 in CDT at the moment - see https://www.eclipse.org/lists/cdt-dev/msg35072.html - for a message from the last active CDT developer who was dedicated to this area.
