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f458192e56
Instead of Module setting up the root_scope with the root source file,
instead, Module relies on the package table graph being set up properly,
and inside `update()`, it does the equivalent of `_ = @import("std");`.
This, in term, imports start.zig, which has the logic to call main (or
not). `Module` no longer has `root_scope` - the root source file is no
longer special, it's just in the package table mapped to "root".
I also went ahead and implemented proper detection of updated files.
mtime, inode, size, and source hash are kept in `Scope.File`.
During an update, iterate over `import_table` and stat each file to find
out which ones are updated.
The source hash is redundant with the source hash used by the struct
decl that corresponds to the file, so it should be removed in a future
commit before merging the branch.
* AstGen: add "previously declared here" notes for variables shadowing
decls.
* Parse imports as structs. Module now calls `AstGen.structDeclInner`,
which is called by `AstGen.containerDecl`.
- `importFile` is a bit kludgy with how it handles the top level Decl
that kinda gets merged into the struct decl at the end of the
function. Be on the look out for bugs related to that as well as
possibly cleaner ways to implement this.
* Module: factor out lookupDeclName into lookupIdentifier and lookupNa
* Rename `Scope.Container` to `Scope.Namespace`.
* Delete some dead code.
This branch won't work until `usingnamespace` is implemented because it
relies on `@import("builtin").OutputMode` and `OutputMode` comes from a
`usingnamespace`.