Allow submodule inferrences with a missing umbrella when the module is unavailable

If the module is unavailable because of a missing header, don't diagnose
a "module * {}" declaration for having a m

Allow submodule inferrences with a missing umbrella when the module is unavailable

If the module is unavailable because of a missing header, don't diagnose
a "module * {}" declaration for having a missing umbrella.

llvm-svn: 206776

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Fix a hole with nested unavailable submodules from r206664

If a module doesn't meet a requirement, neither do its submodules. If we
don't propogate that, we might think it's an error to be missing a

Fix a hole with nested unavailable submodules from r206664

If a module doesn't meet a requirement, neither do its submodules. If we
don't propogate that, we might think it's an error to be missing a
header in one of those submodules.

llvm-svn: 206673

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Don't build modules with (submodules with) missing headers

Unless they are in submodules that aren't available anyway, due to
requirements not being met. Also, mark children as unavailable when the

Don't build modules with (submodules with) missing headers

Unless they are in submodules that aren't available anyway, due to
requirements not being met. Also, mark children as unavailable when the
parent is.

llvm-svn: 206664

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Modules: Don't warn upon missing headers while reading the module map.

Instead, mark the module as unavailable so that clang errors as soon as
someone tries to build this module.

This works towards

Modules: Don't warn upon missing headers while reading the module map.

Instead, mark the module as unavailable so that clang errors as soon as
someone tries to build this module.

This works towards the long-term goal of not stat'ing the header files at all
while reading the module map and instead read them only when the module is
being built (there is a corresponding FIXME in parseHeaderDecl()). However, it
seems non-trivial to get there and this unblock us and moves us into the right
direction.

Also changed the implementation to reuse the same DiagnosticsEngine.

llvm-svn: 197485

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Fix crash if a submodule @imports another submodule from the same module. The
test also adds FIXMEs for a number of places where imports and includes of
submodules don't work very well.

llvm-svn: 19

Fix crash if a submodule @imports another submodule from the same module. The
test also adds FIXMEs for a number of places where imports and includes of
submodules don't work very well.

llvm-svn: 193005

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Implement name hiding for declarations deserialized from a non-visible
module. When that module becomes visible, so do those declarations.

llvm-svn: 145640

When loading a module that involves submodules (e.g., std.vector),
check whether the named submodules themselves are actually
valid, and drill down to the named submodule (although we don't do
anythi

When loading a module that involves submodules (e.g., std.vector),
check whether the named submodules themselves are actually
valid, and drill down to the named submodule (although we don't do
anything with it yet). Perform typo correction on the submodule names
when possible.

llvm-svn: 145477

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