Re: Regular Expression Explanation for 'function.lang'

Hi Peter

due to the syntax of procedure and functions, I doubt that a regular 
expression that recognizes them can be written: you'd need real parsing, 
which source-highlight does not provide...

do you want this lang definition be included in source-highlight?
Could you please provide a test file to be included in the test suite?

I noted that some keywords have a space afterwards, e.g.,

|BETA |BILINEAR |BIN_DATE |BINARY_TEMPLATE |BINDGEN |BINOMIAL |BLK_CON 
|BOX_CURSOR

is it intended?
In general there should be no space after keywords.

cheers
	Lorenzo

On 05/27/2011 10:53 PM, Peter Willis wrote:
> Hello,
>
> There is a 'Wikipedia' page for IDL located at:
> http://en.wikipedia.org/wiki/IDL_(programming_language)
>
> There is a complete IDL programming manual located:
>
> http://idlastro.gsfc.nasa.gov/idl_html_help/Programming_in_IDL.html
>
> Normally procedures an functions are called on one line unless
> the line exceeds 64 (?) characters. In that case the line may use
> '$' symbol to continue the call statement on the next line.
>
> Procedures do not return values, hence they are never called
> as variables.
>
> Functions can happen in-line anywhere.
>
> Commas are also used as delimiters for array members in IDL.
>
> Below is the language definition for rsiidl.lang .
>
>
> 'procedure.lang' is just a duplicate of 'function.lang'
> at this point.
>
> Best Regards,
>
>
> Peter
>
> //////////RSIIDL.LANG BEGIN///////////////////////////
>
> preproc = "include|include_once|require|require_once"
>
> comment start ";"
>
> include "number.lang"
>
> string delim "\"" "\"" escape "\\" multiline
> string delim "'" "'" escape "\\" multiline
>
> keyword =
> "COMMON|COMPILE_OPT|PRO|FUNCTION|BEGIN|BREAK|END|GOTO|IF|THEN|ELSE|ENDIF|CASE|OF|ENDCASE|SWITCH|ENDSWITCH|FOR|DO|CONTINUE|ENDFOR|WHILE|ENDWHILE|LT|LE|EQ|NE|GE|GT|>|<|NOT|OR|XOR|AND|MOD|FORWARD_FUNCTION|ON_ERROR|ON_IOERROR|REPEAT|UNTIL|.COMPILE|.CONTINUE|.EDIT|.FULL_RESET_SESSION|.GO|.OUT|.RESET_SESSION|.RETURN|.RNEW|.RUN|.SKIP|.STEP|.STEPOVER|.TRACE|A_CORRELATE|ABS|ACOS|ADAPT_HIST_EQUAL|ALOG|ALOG10|AMOEBA|ANNOTATE|APP_USER_DIR|APP_USER_DIR_QUERY|ARG_PRESENT|ARRAY_EQUAL|ARRAY_INDICES|ARROW|ASCII_TEMPLATE|ASIN|ASSOC|ATAN|BAR_PLOT|BESELI|BESELJ|BESELK|BESELY
> |BETA |BILINEAR |BIN_DATE |BINARY_TEMPLATE |BINDGEN |BINOMIAL |BLK_CON
> |BOX_CURSOR |BROYDEN |BYTARR |BYTE |BYTSCL |C_CORRELATE |CALDAT
> |CALENDAR |CALL_EXTERNAL |CALL_FUNCTION |CALL_METHOD |CEIL |CHEBYSHEV
> |CHECK_MATH |CHISQR_CVF |CHISQR_PDF |CHOLSOL |CINDGEN |CIR_3PNT
> |CLUST_WTS |CLUSTER |CLUSTER_TREE |COLOR_QUAN |COLORMAP_APPLICABLE
> |COMFIT |COMPLEX |COMPLEXARR |COMPLEXROUND |COMPUTE_MESH_NORMALS |COND
> |CONGRID |CONJ |CONVERT_COORD |CONVOL |COORD2TO3 |CORRELATE |COS |COSH
> |CRAMER |CREATE_CURSOR |CREATE_STRUCT |CREATE_VIEW |CROSSP |CRVLENGTH
> |CT_LUMINANCE |CTI_TEST |CURVEFIT |CV_COORD |CVTTOBM |CW_ANIMATE
> |CW_ANIMATE_GETP |CW_ANIMATE_LOAD |CW_ANIMATE_RUN |CW_ARCBALL |CW_BGROUP
> |CW_CLR_INDEX |CW_COLORSEL |CW_DEFROI |CW_FIELD |CW_FILESEL |CW_FORM
> |CW_FSLIDER |CW_LIGHT_EDITOR |CW_LIGHT_EDITOR_GET |CW_LIGHT_EDITOR_SET
> |CW_ORIENT |CW_PALETTE_EDITOR |CW_PALETTE_EDITOR_GET
> |CW_PALETTE_EDITOR_SET |CW_PDMENU |CW_RGBSLIDER |CW_TMPL |CW_ZOOM
> |DBLARR |DCINDGEN |DCOMPLEX |DCOMPLEXARR |DEFROI |DENDRO_PLOT
> |DENDROGRAM |DERIV |DERIVSIG |DETERM |DIAG_MATRIX |DIALOG_MESSAGE
> |DIALOG_PICKFILE |DIALOG_PRINTERSETUP |DIALOG_PRINTJOB
> |DIALOG_READ_IMAGE |DIALOG_WRITE_IMAGE |DIGITAL_FILTER |DILATE |DINDGEN
> |DISSOLVE |DIST |DISTANCE_MEASURE |DOC_LIBRARY |DOUBLE |EFONT |EIGENQL
> |EIGENVEC |ELMHES |EOF |ERF |ERFC |ERFCX |ERODE |ERRPLOT |EXECUTE |EXP
> |EXPAND |EXPAND_PATH |EXPINT |EXTRAC |EXTRACT_SLICE |F_CVF |F_PDF
> |FACTORIAL |FFT |FILE_BASENAME |FILE_DIRNAME |FILE_EXPAND_PATH
> |FILE_INFO |FILE_LINES |FILE_LINK |FILE_READLINK |FILE_SAME |FILE_SEARCH
> |FILE_TEST |FILE_WHICH |FILEPATH |FINDGEN |FINITE |FIX |FLICK |FLOAT
> |FLOOR |FLOW3 |FLTARR |FORMAT_AXIS_VALUES |FSTAT |FULSTR |FUNCT |FV_TEST
> |FX_ROOT |FZ_ROOTS |GAMMA |GAMMA_CT |GAUSS_CVF |GAUSS_PDF |GAUSS2DFIT
> |GAUSSFIT |GAUSSINT |GET_DRIVE_LIST |GET_KBRD |GET_LUN |GET_SCREEN_SIZE
> |GETENV |GRID_TPS |GRID3 |GRIDDATA |GS_ITER |H_EQ_CT |H_EQ_INT
> |H5_BROWSER |HANNING |HDF_BROWSER |HDF_READ |HILBERT |HIST_2D
> |HIST_EQUAL |HISTOGRAM |HLS |HOUGH |HQR |HSV |IBETA |ICONTOUR |IDENTITY
> |IDL_VALIDNAME |IDLITSYS_CREATETOOL |IGAMMA |IIMAGE |IMAGE_CONT
> |IMAGINARY |IMAP |INDGEN |INT_2D |INT_3D |INT_TABULATED |INTARR
> |INTERPOL |INTERPOLATE |INVERT |IOCTL |IPLOT |ISHFT |ISURFACE |ITCURRENT
> |ITDELETE |ITGETCURRENT |ITREGISTER |ITRESET |ITRESOLVE |IVOLUME |JULDAY
> |KEYWORD_SET |KRIG2D |KURTOSIS |KW_TEST |L64INDGEN |LA_CHOLMPROVE
> |LA_CHOLSOL |LA_DETERM |LA_EIGENPROBLEM |LA_EIGENQL |LA_EIGENVEC
> |LA_ELMHES |LA_GM_LINEAR_MODEL |LA_HQR |LA_INVERT
> |LA_LEAST_SQUARE_EQUALITY |LA_LEAST_SQUARES |LA_LINEAR_EQUATION
> |LA_LUMPROVE |LA_LUSOL |LA_TRIMPROVE |LA_TRISOL |LABEL_DATE
> |LABEL_REGION |LADFIT |LAGUERRE |LEEFILT |LEGENDRE |LINBCG |LINDGEN
> |LINFIT |LL_ARC_DISTANCE |LMFIT |LMGR |LNGAMMA |LNP_TEST |LOADCT
> |LOCALE_GET |LOGICAL_AND |LOGICAL_OR |LOGICAL_TRUE |LON64ARR |LONARR
> |LONG |LONG64 |LSODE |LU_COMPLEX |LUMPROVE |LUSOL |M_CORRELATE |MACHAR
> |MAKE_ARRAY |MAP_2POINTS |MAP_CONTINENTS |MAP_GRID |MAP_IMAGE |MAP_PATCH
> |MAP_PROJ_FORWARD |MAP_PROJ_IMAGE |MAP_PROJ_INFO |MAP_PROJ_INIT
> |MAP_PROJ_INVERSE |MAP_SET |MATRIX_MULTIPLY |MATRIX_POWER |MAX |MD_TEST
> |MEAN |MEANABSDEV |MEDIAN |MEMORY |MESH_CLIP |MESH_DECIMATE
> |MESH_ISSOLID |MESH_MERGE |MESH_NUMTRIANGLES |MESH_OBJ |MESH_SMOOTH
> |MESH_SURFACEAREA |MESH_VALIDATE |MESH_VOLUME |MESSAGE |MIN
> |MIN_CURVE_SURF |MK_HTML_HELP |MODIFYCT |MOMENT |MORPH_CLOSE
> |MORPH_DISTANCE |MORPH_GRADIENT |MORPH_HITORMISS |MORPH_OPEN |MORPH_THIN
> |MORPH_TOPHAT |MPEG_CLOSE |MPEG_OPEN |MPEG_PUT |MPEG_SAVE |MULTI
> |N_ELEMENTS |N_PARAMS |N_TAGS |NEWTON |NORM |OBJ_CLASS |OBJ_ISA |OBJ_NEW
> |OBJ_VALID |OBJARR |OPEN |OPLOTERR |P_CORRELATE |PATH_SEP |PCOMP
> |PLOT_3DBOX |PLOT_FIELD |PLOTERR |PNT_LINE |POLAR_CONTOUR |POLAR_SURFACE
> |POLY |POLY_2D |POLY_AREA |POLY_FIT |POLYFILLV |POLYSHADE |POLYWARP
> |POPD |PRIMES |PRODUCT |PROFILE |PROJECT_VOL |PS_SHOW_FONTS |PSAFM
> |PSEUDO |PTR_NEW |PTR_VALID |PTRARR |QGRID3 |QROMB |QROMO |QSIMP
> |QUERY_BMP |QUERY_DICOM |QUERY_GIF |QUERY_IMAGE |QUERY_JPEG
> |QUERY_JPEG2000 |QUERY_MRSID |QUERY_PICT |QUERY_PNG |QUERY_PPM
> |QUERY_SRF |QUERY_TIFF |QUERY_WAV |R_CORRELATE |R_TEST |RADON |RANDOMN
> |RANDOMU |RANKS |RDPIX |READ_ASCII |READ_BINARY |READ_BMP |READ_DICOM
> |READ_IMAGE |READ_JPEG2000 |READ_MRSID |READ_PNG |READ_SPR |READ_SYLK
> |READ_TIFF |READ_WAV |READ_XWD |REAL_PART |REBIN |RECALL_COMMANDS
> |RECON3 |REFORM |REGION_GROW |REGRESS |REPLICATE |RETALL |REVERSE |RK4
> |ROBERTS |ROT |ROTATE |ROUND |ROUTINE_INFO |RS_TEST |S_TEST |SAVGOL
> |SCOPE_LEVEL |SCOPE_VARFETCH |SCOPE_VARNAME |SEARCH2D |SEARCH3D |SFIT
> |SHIFT |SHMDEBUG |SHMVAR |SIMPLEX |SIN |SINDGEN |SINH |SIZE |SKEWNESS
> |SMOOTH |SOBEL |SORT |SPH_SCAT |SPHER_HARM |SPL_INIT |SPL_INTERP |SPLINE
> |SPRSAB |SPRSAX |SPRSIN |SPRSTP |SQRT |STANDARDIZE |STDDEV |STRARR
> |STRCMP |STRCOMPRESS |STREGEX |STRING |STRJOIN |STRLEN |STRLOWCASE
> |STRMATCH |STRMESSAGE |STRMID |STRPOS |STRSPLIT |STRTRIM |STRUPCASE
> |SVDFIT |SVSOL |SWAP_ENDIAN |SYSTIME |T_CVF |T_PDF |TAG_NAMES |TAN |TANH
> |TEMPORARY |TETRA_CLIP |TETRA_SURFACE |TETRA_VOLUME |THIN |THREED
> |TIMEGEN |TM_TEST |TOTAL |TRACE |TRANSPOSE |TRI_SURF |TRIANGULATE
> |TRIGRID |TRIQL |TRISOL |TS_COEF |TS_DIFF |TS_FCAST |TS_SMOOTH |TV |TVRD
> |UINDGEN |UINT |UINTARR |UL64INDGEN |ULINDGEN |ULON64ARR |ULONARR |ULONG
> |ULONG64 |UNIQ |UNSHARP_MASK |VALUE_LOCATE |VARIANCE |VERT_T3D |VOIGT
> |VOXEL_PROJ |WARP_TRI |WATERSHED |WF_DRAW |WHERE |WIDGET_ACTIVEX
> |WIDGET_BASE |WIDGET_BUTTON |WIDGET_COMBOBOX |WIDGET_DISPLAYCONTEXTMENU
> |WIDGET_DRAW |WIDGET_DROPLIST |WIDGET_EVENT |WIDGET_INFO |WIDGET_LABEL
> |WIDGET_LIST |WIDGET_PROPERTYSHEET |WIDGET_SLIDER |WIDGET_TAB
> |WIDGET_TABLE |WIDGET_TEXT |WIDGET_TREE |WRITE_SYLK |WTN|AXIS|BLAS_AXPY
> |BLAS_AXPY |BYTEORDER |CALL_PROCEDURE |CATCH |CD |CHOLDC |CLOSE
> |COLOR_CONVERT |CONSTRAINED_MIN |CONTOUR |COPY_LUN |CPU |CURSOR
> |DEFINE_KEY |DEFINE_MSGBLK |DEFINE_MSGBLK_FROM_FILE |DEFSYSV |DELVAR
> |DEVICE |DFPMIN |DLM_LOAD |DLM_REGISTER |DRAW_ROI |EMPTY |ENABLE_SYSRTN
> |ERASE |EXIT |FILE_CHMOD |FILE_COPY |FILE_DELETE |FILE_MKDIR |FILE_MOVE
> |FLUSH |FREE_LUN |GRID_INPUT |HEAP_FREE |HEAP_GC |HELP |IMAGE_STATISTICS
> |INTERVAL_VOLUME |ISOCONTOUR |ISOSURFACE |JOURNAL |LA_CHOLDC |LA_LUDC
> |LA_SVD |LA_TRIDC |LA_TRIQL |LA_TRIRED |LINKIMAGE |LUDC |MAKE_DLL
> |OBJ_DESTROY |ONLINE_HELP |ONLINE_HELP_PDF_INDEX |OPLOT |PARTICLE_TRACE
> |PATH_CACHE |PLOT |PLOTS |POINT_LUN |POLYFILL |POWELL
> |PRINT|PRINTD|PRINTF |PROFILER |PROFILES |PTR_FREE |PUSHD |QHULL
> |READ|READ_GIF |READ_INTERFILE |READ_JPEG |READ_PICT |READ_PPM |READ_SRF
> |READ_WAVE |READ_X11_BITMAP |READF |READS |READU |REDUCE_COLORS
> |REGISTER_CURSOR |REPLICATE_INPLACE |RESOLVE_ALL |RESOLVE_ROUTINE
> |RESTORE |SAVE |SCALE3 |SCALE3D |SET_PLOT |SET_SHADING |SETENV
> |SETUP_KEYS |SHADE_SURF |SHADE_SURF_IRR |SHADE_VOLUME |SHMMAP |SHMUNMAP
> |SHOW3 |SHOWFONT |SKIP_LUN |SLICER3 |SLIDE_IMAGE |SOCKET |SPAWN
> |SPH_4PNT |SPLINE_P |STOP |STREAMLINE |STRETCH |STRPUT |STRUCT_ASSIGN
> |STRUCT_HIDE |SURFACE |SURFR |SVDC |SWAP_ENDIAN_INPLACE |T3D |TEK_COLOR
> |TIME_TEST2 |TRIRED |TRUNCATE_LUN |TVCRS |TVLCT |TVSCL |USERSYM
> |VECTOR_FIELD |VEL |VELOVECT |VORONOI |WAIT |WDELETE |WIDGET_CONTROL
> |WINDOW |WRITE_BMP |WRITE_GIF |WRITE_IMAGE |WRITE_JPEG |WRITE_JPEG2000
> |WRITE_NRIF |WRITE_PICT |WRITE_PNG |WRITE_PPM |WRITE_SPR |WRITE_SRF
> |WRITE_TIFF |WRITE_WAV |WRITE_WAVE |WRITEU |WSET |WSHOW |XBM_EDIT
> |XDISPLAYFILE |XDXF |XFONT |XINTERANIMATE |XLOADCT |XMANAGER |XMNG_TMPL
> |XMTOOL |XOBJVIEW |XOBJVIEW_ROTATE |XOBJVIEW_WRITE_IMAGE |XPALETTE
> |XPCOLOR |XPLOT3D |XREGISTERED |XROI |XSQ_TEST |XSURFACE |XVAREDIT
> |XVOLUME |XVOLUME_ROTATE |XVOLUME_WRITE_IMAGE|XYOUTS |ZOOM
> |ZOOM_24|CDF_ATTCREATE|CDF_ATTDELETE|CDF_ATTEXISTS|CDF_ATTGET|CDF_ATTINQ|CDF_ATTNUM|CDF_ATTPUT|CDF_ATTRENAME|CDF_CLOSE|CDF_CONTROL|CDF_CREATE|CDF_DELETE|CDF_DOC|CDF_ENCODE_EPOCH|CDF_EPOCH|CDF_ERROR|CDF_EXISTS|CDF_INQUIRE|CDF_LIB_INFO|CDF_OPEN|CDF_PARSE_EPOCH|CDF_VARCREATE|CDF_VARDELETE|CDF_VARGET|CDF_VARGET1|CDF_VARINQ|CDF_VARNUM|CDF_VARPUT|CDF_VARRENAME|HDF_CLOSE|HDF_DELDD|HDF_DF24_ADDIMAGE|HDF_DF24_GETIMAGE|HDF_DF24_GETINFO|HDF_DF24_LASTREF|HDF_DF24_NIMAGES|HDF_DF24_READREF|HDF_DF24_RESTART|HDF_DFAN_ADDFDS|HDF_DFAN_ADDFID|HDF_DFAN_GETDESC|HDF_DFAN_GETFDS|HDF_DFAN_GETFID|HDF_DFAN_GETLABEL|HDF_DFAN_LABLIST|HDF_DFAN_LASTREF|HDF_DFAN_PUTDESC|HDF_DFAN_PUTLABEL|HDF_DFP_ADDPAL|HDF_DFP_GETPAL|HDF_DFP_LASTREF|HDF_DFP_NPALS|HDF_DFP_PUTPAL|HDF_DFP_READREF|HDF_DFP_RESTART|HDF_DFP_WRITEREF|HDF_DFR8
 _ADDIMAGE|HDF_DFR8_GETIMAGE|HDF_DFR8_GETINFO|HDF_DFR8_LASTREF|HDF_DFR8_NIMAGES|HDF_DFR8_PUTIMAGE|HDF_DFR8_READREF|HDF_DFR8_RESTART|HDF_DFR8_SETPALETTE|HDF_DFSD_ADDDATA|HDF_DFSD_DIMGET|HDF_DF
S
>
> D_DIMSET|HDF_DFSD_ENDSLICE|HDF_DFSD_GETDATA|HDF_DFSD_GETINFO|HDF_DFSD_GETSLICE|HDF_DFSD_PUTSLICE|HDF_DFSD_READREF|HDF_DFSD_SETINFO|HDF_DFSD_STARTSLICE|HDF_DUPDD|HDF_EXISTS|HDF_ISHDF|HDF_LIB_INFO|HDF_NEWREF|HDF_NUMBER|HDF_OPEN|HDF_GR_ATTRINFO|HDF_SD_ATTRFIND|HDF_SD_ATTRINFO|HDF_SD_ATTRSET|HDF_SD_CREATE|HDF_SD_DIMGET|HDF_SD_DIMGETID|HDF_SD_DIMSET|HDF_SD_END|HDF_SD_ENDACCESS|HDF_SD_FILEINFO|HDF_SD_GETDATA|HDF_SD_GETINFO|HDF_SD_IDTOREF|HDF_SD_ISCOORDVAR|HDF_SD_NAMETOINDEX|HDF_SD_REFTOINDEX|HDF_SD_SELECT|HDF_SD_SETEXTFILE|HDF_SD_SETINFO|HDF_SD_START|HDF_VD_ATTACH|HDF_VD_DETACH|HDF_VD_FDEFINE|HDF_VD_FEXIST|HDF_VD_FIND|HDF_VD_GET|HDF_VD_GETID|HDF_VD_GETINFO|HDF_VD_GETNEXT|HDF_VD_INSERT|HDF_VD_ISVD|HDF_VD_ISVG|HDF_VD_LONE|HDF_VD_READ|HDF_VD_SEEK|HDF_VD_SETINFO|HDF_VD_WRITE|HDF_VG_ADDTR|HDF_VG_AT
 TACH|HDF_VG_DETACH|HDF_VG_GETID|HDF_VG_GETINFO|HDF_VG_GETNEXT|HDF_VG_GETTR|HDF_VG_GETTRS|HDF_VG_INQTR|HDF_VG_INSERT|HDF_VG_ISVD|HDF_VG_ISVG|HDF_VG_LONE|HDF_VG_NUMBER|HDF_VG_SETINFO|NCDF_ATTC
OP
>
> Y|NCDF_ATTDEL|NCDF_ATTGET|NCDF_ATTINQ|NCDF_ATTNAME|NCDF_ATTPUT|NCDF_ATTRENAME|NCDF_CLOSE|NCDF_CONTROL|NCDF_CREATE|NCDF_DIMDEF|NCDF_DIMID|NCDF_DIMINQ|NCDF_DIMRENAME|NCDF_EXISTS|NCDF_INQUIRE|NCDF_OPEN|NCDF_VARDEF|NCDF_VARGET|NCDF_VARGET1|NCDF_VARID|NCDF_VARINQ|NCDF_VARPUT|NCDF_VARRENAME|ENDELSE|RETURN"
>
>
> comment delim "/*" "*/" multiline nested
>
> type = '(?:\$[#]?|@|%)[[:word:]]+'
>
> include "symbols.lang"
>
> cbracket = "{|}"
>
> include "function.lang"
> include "procedure.lang"
>
> variable = '[[:upper:]][[:word:]]*|_'
>
> ///////////////////RSIIDL.LANG END////////////////////////////////
>
>
>
>
> On 5/27/2011 1:57 AM, Lorenzo Bettini wrote:
>> Hi
>>
>> do procedure (and functions) are always called on a line?
>> I mean, is the procedure name always at the beginning of a line
>> (possibly with some spaces before)?
>>
>> Are commas used also in other contexts besides function and procedure
>> invocation?
>>
>> cheers
>> Lorenzo
>>
>> P.S. some examples of programs might be useful to do some tests; have
>> you already a partial language definition for IDL to start from?
>>
>> On 05/24/2011 05:27 PM, Peter Willis wrote:
>>> On 5/23/2011 7:10 AM, Lorenzo Bettini wrote:
>>>
>>>> (?=\()
>>>>
>>>> checks whether after the name there's a ( but does not consume it
>>>>
>>>> can the syntax of your procedure definition be identified with a
>>>> regular
>>>> expression?
>>>>
>>>> Can you make some examples of procedures?
>>>>
>>>> cheers
>>>> Lorenzo
>>>
>>>
>>> Hello,
>>>
>>> In 'IDL' procedures are *called* in the following way:
>>>
>>> PROCEDURE_NAME , ARGUMENT_1, ARGUMENT_2, ARGUMENT_3, .... , ARGUMENT_N
>>>
>>> As you can see no brackets or parenthesis are used. The problem here is
>>> a regex would need to deal with only the first case of the
>>> comma positioned after 'PROCEDURE_NAME' and ignore all other groupings
>>> until the end of the statement.
>>>
>>> There is also on other problem in that statements can use continuation
>>> where a '$' indicates the current statement continues on to the
>>> next line:
>>>
>>> PROCEDURE_NAME , ARGUMENT_1, $
>>> ARGUMENT_2, ARGUMENT_3, $
>>> .... , ARGUMENT_N
>>>
>>> In this case regex needs to distinguish between the case of
>>> 'PRODEDURE_NAME' and cases where the statement has been continued.
>>> ie: not highlight 'ARGUMENT_2' due to the comma following there.
>>>
>>>
>>> Declarations for *both* functions and procedures are written in
>>> similar ways. The difference is only the 'RETURN' value in the case
>>> of functions:
>>>
>>> FUNCTION function_name, arg_1, arg_2 $
>>> arg_3, arg_4, ...., arg_n
>>> ....<PROGRAM STATEMENTS>...
>>>
>>> RETURN, some_value
>>> END
>>>
>>>
>>> PRO procedure_name, arg_1, arg_2 arg_3, arg_4, ....,$
>>> arg_n
>>> ....<PROGRAM STATEMENTS>...
>>> END
>>>
>>>
>>>
>>> Best Regards,
>>>
>>>


-- 
Lorenzo Bettini, PhD in Computer Science, DI, Univ. Torino
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