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f7a15e0021
f18's module files are Fortran with a leading header comment containing the module file format version and a hash of the following contents. This hash is currently used only to protect module files against corruption and truncation. Extend the use of these hashes to catch or avoid some error cases. When one module file depends upon another, note its hash in additional module file header comments. This allows the compiler to detect when the module dependency is on a module file that has been updated. Further, it allows the compiler to find the right module file dependency when the same module file name appears in multiple directories on the module search path. The order in which module files are written, when multiple modules appear in a source file, is such that every dependency is written before the module(s) that depend upon it, so that their hashes are known. A warning is emitted when a module file is not the first hit on the module file search path. Further work is needed to add a compiler option that emits (larger) stand-alone module files that incorporate copies of their dependencies rather than relying on search paths. This will be desirable for application libraries that want to ship only "top-level" module files without needing to include their dependencies. Another future work item would be to admit multiple modules in the same compilation with the same name if they have distinct hashes.
33 lines
891 B
C++
33 lines
891 B
C++
//===-- lib/Semantics/resolve-names.h ---------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef FORTRAN_SEMANTICS_RESOLVE_NAMES_H_
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#define FORTRAN_SEMANTICS_RESOLVE_NAMES_H_
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namespace llvm {
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class raw_ostream;
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}
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namespace Fortran::parser {
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struct Program;
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}
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namespace Fortran::semantics {
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class Scope;
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class SemanticsContext;
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class Symbol;
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bool ResolveNames(SemanticsContext &, const parser::Program &, Scope &top);
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void ResolveSpecificationParts(SemanticsContext &, const Symbol &);
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void DumpSymbols(llvm::raw_ostream &);
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} // namespace Fortran::semantics
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#endif // FORTRAN_SEMANTICS_RESOLVE_NAMES_H_
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