[Bug 72273] New: GLSL preprocessor does not support expressions in #line

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72273

          Priority: medium
            Bug ID: 72273
          Assignee: idr at freedesktop.org
           Summary: GLSL preprocessor does not support expressions in
                    #line
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: idr at freedesktop.org
          Hardware: Other
            Status: NEW
           Version: git
         Component: glsl-compiler
           Product: Mesa

The GLSL spec says (emphasis mine):

    "#line must have, after macro substitution, one of the following forms:

        #line line
        #line line source-string-number

    where line and source-string-number are constant integer *expressions*."

However, Mesa's preprocessor rejects shaders like:

#line 20
#line (20)
#line (10+10)
#line +20

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