Used to indicate that the translation unit should cache some code-completion results with each reparse of the source file.

Caching of code-completion results is a performance optimization that introduces some overhead to reparsing but improves the performance of code-completion operations.

Used to indicate that the precompiled preamble should be created on the first parse. Otherwise it will be created on the first reparse. This trades runtime on the first parse (serializing the preamble takes time) for reduced runtime on the second parse (can now reuse the preamble).

DEPRECATED: Enabled chained precompiled preambles in C++.

Note: this is a temporary option that is available only while we are testing C++ precompiled preamble support. It is deprecated.

Used to indicate that the parser should construct a "detailed" preprocessing record, including all macro definitions and instantiations.

Constructing a detailed preprocessing record requires more memory and time to parse, since the information contained in the record is usually not retained. However, it can be useful for applications that require more detailed information about the behavior of the preprocessor.

Used to indicate that the translation unit will be serialized with clang_saveTranslationUnit.

This option is typically used when parsing a header with the intent of producing a precompiled header.

Used to indicate that non-errors from included files should be ignored.

If set, clang_getDiagnosticSetFromTU() will not report e.g. warnings from included files anymore. This speeds up clang_getDiagnosticSetFromTU() for the case where these warnings are not of interest, as for an IDE for example, which typically shows only the diagnostics in the main file.

Used to indicate that attributed types should be included in CXType.

Used to indicate that brief documentation comments should be included into the set of code completions returned from this translation unit.

Used to indicate that the translation unit is incomplete.

When a translation unit is considered "incomplete", semantic analysis that is typically performed at the end of the translation unit will be suppressed. For example, this suppresses the completion of tentative declarations in C and of instantiation of implicitly-instantiation function templates in C++. This option is typically used when parsing a header with the intent of producing a precompiled header.

Do not stop processing when fatal errors are encountered.

When fatal errors are encountered while parsing a translation unit, semantic analysis is typically stopped early when compiling code. A common source for fatal errors are unresolvable include files. For the purposes of an IDE, this is undesirable behavior and as much information as possible should be reported. Use this flag to enable this behavior.

Used in combination with CXTranslationUnit_SkipFunctionBodies to constrain the skipping of function bodies to the preamble.

The function bodies of the main file are not skipped.

Used to indicate that no special translation-unit options are needed.

Used to indicate that the translation unit should be built with an implicit precompiled header for the preamble.

An implicit precompiled header is used as an optimization when a particular translation unit is likely to be reparsed many times when the sources aren't changing that often. In this case, an implicit precompiled header will be built containing all of the initial includes at the top of the main file (what we refer to as the "preamble" of the file). In subsequent parses, if the preamble or the files in it have not changed, clang_reparseTranslationUnit() will re-use the implicit precompiled header to improve parsing performance.

Tells the preprocessor not to skip excluded conditional blocks.

Sets the preprocessor in a mode for parsing a single file only.

Used to indicate that function/method bodies should be skipped while parsing.

This option can be used to search for declarations/definitions while ignoring the usages.

Used to indicate that implicit attributes should be visited.