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Add support for ADR and REF functions #373

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ghaith opened this issue Nov 12, 2021 · 0 comments
Closed

Add support for ADR and REF functions #373

ghaith opened this issue Nov 12, 2021 · 0 comments
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compatibility-oscat syntax or semantics which are not necessarily part of the standard, but seen in the oscat-libraries enhancement New feature or request language feature (norm) a missing language feature according to iec61131-3
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Standard function...

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@ghaith
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ghaith commented Nov 12, 2021

Is your feature request related to a problem? Please describe.

the REF function is defined in the norm to return a pointer to the given value.
REF will only return a correct datatype reference (Not an address)
Calling REF on temporary or function variables is not supported.

The ADR function is used in Codesys and similar systems to create a pointer.
We can repurpose it to return a pointer size type (not DWORD as it is now)
This newly defined pointer type should be tracked in #353
The result of the ADR function should be assignable to/from a reference.

Additional context
We currently use the & operator as a REF, we should free that operator to be used as AND later as described in the norm.
@ghaith ghaith added compatibility-oscat syntax or semantics which are not necessarily part of the standard, but seen in the oscat-libraries enhancement New feature or request language feature (norm) a missing language feature according to iec61131-3 labels Nov 12, 2021
@ghaith ghaith closed this as completed Apr 26, 2022
@ghaith ghaith moved this to Done in Next Jan 9, 2023
@ghaith ghaith added this to Next Jan 9, 2023
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compatibility-oscat syntax or semantics which are not necessarily part of the standard, but seen in the oscat-libraries enhancement New feature or request language feature (norm) a missing language feature according to iec61131-3
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Standard function support
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