Support for __LINE__ and __FILE__ in preprocessor (#1772)

* #include an absolute path didn't work - because paths were taken to always be relative.

* First pass support for __LINE__ and __FILE__.

* Test include handling with __FILE__
Fix diagnostic compare when input is empty.

* Fix some issues in preprocessor handling of special macros like __LINE__
Add a more complex test.

* Use CONCAT2 in tests, because preprocessor doesn't quite get parameter expansion correct.

* Make __FILE__ and __LINE__ behave more like Clang/Gcc.

* A test for preprocessor bug.

* Fix __LINE__ and __FILE__ in macro expansion, should be initiating location.

* Fix some comments.

* Small tidy up around builtin macros.

* Small improvements for macro type names.
Escape found paths.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/core/slang-char-util.h b/source/core/slang-char-util.h
index 810cde0b1..2434697d4 100644
--- a/source/core/slang-char-util.h
+++ b/source/core/slang-char-util.h
@@ -17,6 +17,7 @@ struct CharUtil
             Digit                       = 0x04,         ///< 0-9
             HorizontalWhitespace        = 0x08,         ///< Whitespace that can appear horizontally (ie excluding CR/LF)
             HexDigit                    = 0x10,         ///< 0-9, a-f, A-F
+            VerticalWhitespace          = 0x20,         ///< \n \r
         };
     };
 
@@ -24,6 +25,8 @@ struct CharUtil
     SLANG_FORCE_INLINE static bool isLower(char c) { return c >= 'a' && c <= 'z'; }
     SLANG_FORCE_INLINE static bool isUpper(char c) { return c >= 'A' && c <= 'Z'; }
     SLANG_FORCE_INLINE static bool isHorizontalWhitespace(char c) { return c == ' ' || c == '\t'; }
+    SLANG_FORCE_INLINE static bool isVerticalWhitespace(char c) { return c == '\n' || c == '\r'; }
+    SLANG_FORCE_INLINE static bool isWhitespace(char c) { return (getFlags(c) & (Flag::HorizontalWhitespace | Flag::VerticalWhitespace)) != 0; }
 
         /// True if it's alpha
     SLANG_FORCE_INLINE static bool isAlpha(char c) { return (getFlags(c) & (Flag::Upper | Flag::Lower)) != 0; }
@@ -38,6 +41,7 @@ struct CharUtil
         /// Given a character return the upper case equivalent
     SLANG_FORCE_INLINE static char toUpper(char c) { return (c >= 'a' && c <= 'z') ? (c -'a' + 'A') : c; }
 
+    
     struct CharFlagMap
     {
         Flags flags[0x100];