Index

An "index" that consists of a set of translation units that would typically be linked together into an executable or library.

Provides a shared context for creating translation units.

It provides two options:

- excludeDeclarationsFromPCH: When non-zero, allows enumeration of "local" declarations (when loading any new translation units). A "local" declaration is one that belongs in the translation unit itself and not in a precompiled header that was used by the translation unit. If zero, all declarations will be enumerated.

Here is an example:

struct Index {

import clang.Util;;

RefCounted!ContainIndex cx;

this(bool excludeDeclarationsFromPCH, bool displayDiagnostics);

}

Constructors

this this(bool excludeDeclarationsFromPCH, bool displayDiagnostics): Undocumented in source.

Alias This

Members

Variables

cx RefCounted!ContainIndex cx;: Undocumented in source.

Examples

// excludeDeclsFromPCH = 1, displayDiagnostics=1
Idx = clang_createIndex(1, 1);

// IndexTest.pch was produced with the following command:
// "clang -x c IndexTest.h -emit-ast -o IndexTest.pch"
TU = clang_createTranslationUnit(Idx, "IndexTest.pch");

// This will load all the symbols from 'IndexTest.pch'
clang_visitChildren(clang_getTranslationUnitCursor(TU),
                    TranslationUnitVisitor, 0);
clang_disposeTranslationUnit(TU);

// This will load all the symbols from 'IndexTest.c', excluding symbols
// from 'IndexTest.pch'.
char *args[] = { "-Xclang", "-include-pch=IndexTest.pch" };
TU = clang_createTranslationUnitFromSourceFile(Idx, "IndexTest.c", 2, args,
                                               0, 0);
clang_visitChildren(clang_getTranslationUnitCursor(TU),
                    TranslationUnitVisitor, 0);
clang_disposeTranslationUnit(TU);

This process of creating the 'pch', loading it separately, and using it (via -include-pch) allows 'excludeDeclsFromPCH' to remove redundant callbacks (which gives the indexer the same performance benefit as the compiler).