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Previously, a preamble only included #if blocks (and friends like ifdef) if there was a corresponding #endif before any declaration or definition. The problem is that any header file that uses include guards will not have a preamble generated, which can make code-completion very slow. To prevent errors about unbalanced preprocessor conditionals in the preamble, and unbalanced preprocessor conditionals after a preamble containing unfinished conditionals, the conditional stack is stored in the pch file. This fixes PR26045. Differential Revision: http://reviews.llvm.org/D15994 llvm-svn: 304207
20 lines
524 B
C
20 lines
524 B
C
// Preamble detection test: header with an include guard.
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#ifndef HEADER_H
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#define HEADER_H
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#include "foo"
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int bar;
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#endif
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// This test checks for detection of the preamble of a file, which
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// includes all of the starting comments and #includes.
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// RUN: %clang_cc1 -print-preamble %s > %t
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// RUN: echo END. >> %t
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// RUN: FileCheck < %t %s
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// CHECK: // Preamble detection test: header with an include guard.
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// CHECK-NEXT: #ifndef HEADER_H
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// CHECK-NEXT: #define HEADER_H
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// CHECK-NEXT: #include "foo"
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// CHECK-NEXT: END.
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