This is just for '\' that's not before a new line.
Note the specification says it has no use other than as line continuation,
but #error is a grey area. (There are no escape sequences.)

Fix public bug 1277: #line L sets the next line to L+1 or just L, based on the version of the language.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@29277 e7fa87d3-cd2b-0410-9028-fcbf551c1848

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24635 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Preprocessor: Rationalize, simplify, and correct the stack of input sources and their tokenization.  This included
 - consistently dealing with EOF and its effect on error recovery (bug 11444, #1)
 - turning a simulated OO hierarchy of function pointers and typecasting into a real C++ class hierarchy
 - correctly handling '\' everywhere, in all classes of tokens, as a layer before preprocessing itself
 - conditionally handling '\n' in macro expansion input, depending on whether it is in a macro expression or not
 - delete some unused "memory cleanup" code


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24626 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Preprocessor:  Implement skipping of macros that evaluate to nothing while evaluating expressions.  They had been causing early termination of an expression's evaluation.

Also includes some unrelated updates of documentation.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24420 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Preprocessor:  Fixed that some comments incorrectly substituted a new line instead of space.  Also generally cleaned up the space-related coding.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24387 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Add #line functionality to allow expressions instead of just literals.  Also made some preprocessor code slightly more clear.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24294 e7fa87d3-cd2b-0410-9028-fcbf551c1848

 - Correctly handle non-directive lines starting with "#"
 - Correctly ignore unrecognized #pragma
 - Partial fix for new lines in the middle of macro invocation



git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24266 e7fa87d3-cd2b-0410-9028-fcbf551c1848

 - do version checking for the line-continuation character
 - check for built-in names in #undef
 - bug fix for #elif after #else
 - do version checking for use of floating point suffixes (f, LF, etc.)


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24011 e7fa87d3-cd2b-0410-9028-fcbf551c1848

 - macro expansion of hexidecimal numbers 
 - give errors instead of warnings/silence on extra tokens after #endif, #else, etc.
 - give errors on reserved macro name use, reuse of argument, and redefinition with different whitespace presence
 - detect and give error for all cases of #elif and #else after #else



git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@23982 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Eliminate flex as the GLSL lexical analyzer, going from two nested lexical analyzers down to one, leaving just the preprocessor's lexical analysis.  A new layer replaces it, to translate from the preprocessor's view of tokenization to glslang's view of tokenization.

Also:
 - change source locations from an int to TSourceLoc (shader number, line number) throughout
 - various improvements to the preprocessor


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@22277 e7fa87d3-cd2b-0410-9028-fcbf551c1848

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@22000 e7fa87d3-cd2b-0410-9028-fcbf551c1848

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@21998 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Fix another problem with undefined macros needing to evaluate to 0 within a preprocessor expression, but not outside a preprocessor expression.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@21815 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Make the PP report an error on undefined macro in "#if ..." for ES profiles, unless relaxed error checking is requested.  Still works as normal CPP on non-ES.

Also, improved error reporting in general for the PP.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@21417 e7fa87d3-cd2b-0410-9028-fcbf551c1848

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@20509 e7fa87d3-cd2b-0410-9028-fcbf551c1848

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@20457 e7fa87d3-cd2b-0410-9028-fcbf551c1848