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An (optional) extra position field is added to token_data and set for any identifier token created from a macro expansion. This information is used to correctly calculate the filename and line number.
29 lines
1.1 KiB
C++
29 lines
1.1 KiB
C++
/*=============================================================================
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Boost.Wave: A Standard compliant C++ preprocessor library
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http://www.boost.org/
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Copyright (c) 2020 Jeff Trull. Distributed under the Boost
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Software License, Version 1.0. (See accompanying file
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LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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Part of the test included in this file was taken from a tweet by
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Eric Niebler: https://twitter.com/ericniebler/status/1252660334545866752
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=============================================================================*/
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// Test __LINE__ and __FILE__ in a context where the invocation of the macro
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// that uses them is split across two lines
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// __LINE__ should reflect the position where the macros are expanded
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#define FOO(X) __LINE__ __FILE__ BAR
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#define BAR(X) __LINE__ __FILE__
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FOO(X)
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(Y)
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//R #line 19 "t_5_036.cpp"
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//R 19 "$F" 19 "$F"
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// now use those same macros in a different file -
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// __FILE__ should report that.
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#include "t_5_036.hpp"
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//R #line 11 "t_5_036.hpp"
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//R 11 "$P(t_5_036.hpp)" 11 "$P(t_5_036.hpp)"
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