| Commit message (Collapse) | Author | Age |
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The parent and child collections for hierarchical source units were
previously vecs, and would receive one entry for every symbol matched.
This was easily leading to many dozens of duplicate entries per unit,
which, while not impacting performance, seemed wasteful. The collection
types were changed to HashSets to prevent the collection of duplicate
entries.
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There is the possibility that the same source file could be discovered
twice, if the same folder is included multiple times as a library folder
or if symbolic links are used that link to already-included files. These
duplicate source files are now ignored, to prevent erroneous 'duplicate
definition' errors from being generated.
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Previously, if a source file failed to parse, no symbols would be
returned and symbol resolution would continue as normal. This would
obscure the source of any errors, as well as the fact that any error
had occurred at all.
We don't want all errors in all source files to be printed at symbol
resolution time, because this could bury any errors in the actual
program being assembled with potentially irrelevant library errors,
and errors in the program being assembled will be printed all over
again once a merged source file has been produced.
Instead, we allow the parser function to return a None value if the
file could not be parsed, and a single line is printed as a warning
for every library file that failed to parse.
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The API of the extract_if method has changed to also take a range.
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Definitions were incorrectly not having resolved references associated
with them.
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Previously, the Resolver::error method was only checking for undefined
symbols, and not also checking for redefined symbols.
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This is used for debugging symbol definition and resolution issues.
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As well as the already-implemented tracking of the existing definition
of redefinitions, the resolver will now also track the definition that
resolves each reference, and the references resolved by each definition.
Instead of using tuples to hold this information, named wrapper structs
have been created for each category.
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A definition can resolve a reference in the same or a deeper namespace,
allowing for proper scoping and shadowing. Multiple definitions in the
same namespace cannot share a name.
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This library can now carry out all stages of assembly from collecting
source fragments to resolving symbols to pruning unused libraries to
generating a single compiled source file.
Pretty-printing of state has also been implemented in this library.
The source tree hierarchy, symbol resolution errors, and file read
errors can all be printed in a tidy format.
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