stb_c_lexer: fix NUL eof test so it compiles

stb_c_lexer.h

@@ -608,7 +608,7 @@ int stb_c_lexer_get_token(stb_lexer *lexer)
          // check for EOF
          STB_C_LEX_0_IS_EOF(
             if (*p == 0)
-               return stb__clex_eof(tok);
+               return stb__clex_eof(lexer);
          )
 
       single_char:

tests/test_cpp_compilation.cpp

@@ -7,7 +7,6 @@
 #include "stb_image_write.h"
 #include "stb_perlin.h"
 #include "stb_dxt.h"
-#include "stb_c_lexer.h"
 #include "stb_divide.h"
 #include "stb_herringbone_wang_tile.h"
 #include "stb_ds.h"
@@ -183,3 +182,51 @@ void dummy3(void)
   stb_textedit_initialize_state(0,0);
   stb_textedit_paste(0,0,0,0);
 }
+
+#define STB_C_LEX_C_DECIMAL_INTS    Y   //  "0|[1-9][0-9]*"                        CLEX_intlit
+#define STB_C_LEX_C_HEX_INTS        Y   //  "0x[0-9a-fA-F]+"                       CLEX_intlit
+#define STB_C_LEX_C_OCTAL_INTS      Y   //  "[0-7]+"                               CLEX_intlit
+#define STB_C_LEX_C_DECIMAL_FLOATS  Y   //  "[0-9]*(.[0-9]*([eE][-+]?[0-9]+)?)     CLEX_floatlit
+#define STB_C_LEX_C99_HEX_FLOATS    N   //  "0x{hex}+(.{hex}*)?[pP][-+]?{hex}+     CLEX_floatlit
+#define STB_C_LEX_C_IDENTIFIERS     Y   //  "[_a-zA-Z][_a-zA-Z0-9]*"               CLEX_id
+#define STB_C_LEX_C_DQ_STRINGS      Y   //  double-quote-delimited strings with escapes  CLEX_dqstring
+#define STB_C_LEX_C_SQ_STRINGS      N   //  single-quote-delimited strings with escapes  CLEX_ssstring
+#define STB_C_LEX_C_CHARS           Y   //  single-quote-delimited character with escape CLEX_charlits
+#define STB_C_LEX_C_COMMENTS        Y   //  "/* comment */"
+#define STB_C_LEX_CPP_COMMENTS      Y   //  "// comment to end of line\n"
+#define STB_C_LEX_C_COMPARISONS     Y   //  "==" CLEX_eq  "!=" CLEX_noteq   "<=" CLEX_lesseq  ">=" CLEX_greatereq
+#define STB_C_LEX_C_LOGICAL         Y   //  "&&"  CLEX_andand   "||"  CLEX_oror
+#define STB_C_LEX_C_SHIFTS          Y   //  "<<"  CLEX_shl      ">>"  CLEX_shr
+#define STB_C_LEX_C_INCREMENTS      Y   //  "++"  CLEX_plusplus "--"  CLEX_minusminus
+#define STB_C_LEX_C_ARROW           Y   //  "->"  CLEX_arrow
+#define STB_C_LEX_EQUAL_ARROW       N   //  "=>"  CLEX_eqarrow
+#define STB_C_LEX_C_BITWISEEQ       Y   //  "&="  CLEX_andeq    "|="  CLEX_oreq     "^="  CLEX_xoreq
+#define STB_C_LEX_C_ARITHEQ         Y   //  "+="  CLEX_pluseq   "-="  CLEX_minuseq
+                                        //  "*="  CLEX_muleq    "/="  CLEX_diveq    "%=" CLEX_modeq
+                                        //  if both STB_C_LEX_SHIFTS & STB_C_LEX_ARITHEQ:
+                                        //                      "<<=" CLEX_shleq    ">>=" CLEX_shreq
+
+#define STB_C_LEX_PARSE_SUFFIXES    N   // letters after numbers are parsed as part of those numbers, and must be in suffix list below
+#define STB_C_LEX_DECIMAL_SUFFIXES  ""  // decimal integer suffixes e.g. "uUlL" -- these are returned as-is in string storage
+#define STB_C_LEX_HEX_SUFFIXES      ""  // e.g. "uUlL"
+#define STB_C_LEX_OCTAL_SUFFIXES    ""  // e.g. "uUlL"
+#define STB_C_LEX_FLOAT_SUFFIXES    ""  //
+
+#define STB_C_LEX_0_IS_EOF             Y  // if Y, ends parsing at '\0'; if N, returns '\0' as token
+#define STB_C_LEX_INTEGERS_AS_DOUBLES  N  // parses integers as doubles so they can be larger than 'int', but only if STB_C_LEX_STDLIB==N
+#define STB_C_LEX_MULTILINE_DSTRINGS   N  // allow newlines in double-quoted strings
+#define STB_C_LEX_MULTILINE_SSTRINGS   N  // allow newlines in single-quoted strings
+#define STB_C_LEX_USE_STDLIB           Y  // use strtod,strtol for parsing #s; otherwise inaccurate hack
+#define STB_C_LEX_DOLLAR_IDENTIFIER    Y  // allow $ as an identifier character
+#define STB_C_LEX_FLOAT_NO_DECIMAL     Y  // allow floats that have no decimal point if they have an exponent
+
+#define STB_C_LEX_DEFINE_ALL_TOKEN_NAMES  N   // if Y, all CLEX_ token names are defined, even if never returned
+                                              // leaving it as N should help you catch config bugs
+
+#define STB_C_LEX_DISCARD_PREPROCESSOR    Y   // discard C-preprocessor directives (e.g. after prepocess
+                                              // still have #line, #pragma, etc)
+
+//#define STB_C_LEX_ISWHITE(str)    ... // return length in bytes of whitespace characters if first char is whitespace
+
+#define STB_C_LEXER_DEFINITIONS         // This line prevents the header file from replacing your definitions
+#include "stb_c_lexer.h"