Bug in macro replacement in display
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评估
调研方向
Start by reproducing the nested-display case: a parent display passes P=QE1:FX4:, R=Current1:, and a child passes RN=$(R)TSTotal in the same macro list as R. Find where the Phoebus display runtime expands macros for child displays and check whether parameters are substituted in order, so later values see earlier replacements. Done when the plot title resolves to QE1:FX4:Current1:TSTotal and the ADL-converted and native .bob cases behave the same.
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描述
I think I have found a bug in macro replacement in display files. In my case these are files that are converted from medm .adl files, but I think the problem is more general.
I originally saw the problem using the adl converter from Phoebus 4.6.10 and Phoebus display 4.7.3. But I have reproduced it using both the converter and display in Phoebus 6.0.0.
This is an example of the problem.
quadEM.bob loads the related display file NDStats, and passes the macro parameters P=QE1:FX4:, R=Current1:
NDStats.bob loads the related display file NDStatsTimeSeriesPlot, and passes the parameters P=$(P), R=$(R)TS:, RN=$(R)TSTotal
The title of this plot is $(P)$(RN)
After substitution the plot title should thus be QE1:FX4:Current1:TSTotal.
However, it is not. As seen below it is QE1:FX4:Current1:TS:TSTotal.
The reason is clear. This is the screen for the Actions of the menu that calls NDStatsTimeSeriesPlot:
What is happening is that it is not using the original value of R when it builds RN, it is using the modified version from the first line.
I can work around the problem by swapping these 2 lines in the .adl file, so that RN is built before R. But it seems that this should be fixed in the translation or runtime engine.
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