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diff --git a/runtime/syntax/idlang.vim b/runtime/syntax/idlang.vim
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+" Interactive Data Language syntax file (IDL, too [:-)]
+" Maintainer: Aleksandar Jelenak <ajelenak AT yahoo.com>
+" Last change: 2011 Apr 11
+" Created by: Hermann Rochholz <Hermann.Rochholz AT gmx.de>
+
+" Remove any old syntax stuff hanging around
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
+ finish
+endif
+
+syntax case ignore
+
+syn match idlangStatement "^\s*pro\s"
+syn match idlangStatement "^\s*function\s"
+syn keyword idlangStatement return continue mod do break
+syn keyword idlangStatement compile_opt forward_function goto
+syn keyword idlangStatement begin common end of
+syn keyword idlangStatement inherits on_ioerror begin
+
+syn keyword idlangConditional if else then for while case switch
+syn keyword idlangConditional endcase endelse endfor endswitch
+syn keyword idlangConditional endif endrep endwhile repeat until
+
+syn match idlangOperator "\ and\ "
+syn match idlangOperator "\ eq\ "
+syn match idlangOperator "\ ge\ "
+syn match idlangOperator "\ gt\ "
+syn match idlangOperator "\ le\ "
+syn match idlangOperator "\ lt\ "
+syn match idlangOperator "\ ne\ "
+syn match idlangOperator /\(\ \|(\)not\ /hs=e-3
+syn match idlangOperator "\ or\ "
+syn match idlangOperator "\ xor\ "
+
+syn keyword idlangStop stop pause
+
+syn match idlangStrucvar "\h\w*\(\.\h\w*\)\+"
+syn match idlangStrucvar "[),\]]\(\.\h\w*\)\+"hs=s+1
+
+syn match idlangSystem "\!\a\w*\(\.\w*\)\="
+
+syn match idlangKeyword "\([(,]\s*\(\$\_s*\)\=\)\@<=/\h\w*"
+syn match idlangKeyword "\([(,]\s*\(\$\_s*\)\=\)\@<=\h\w*\s*="
+
+syn keyword idlangTodo contained TODO
+
+syn region idlangString start=+"+ end=+"+
+syn region idlangString start=+'+ end=+'+
+
+syn match idlangPreCondit "^\s*@\w*\(\.\a\{3}\)\="
+
+syn match idlangRealNumber "\<\d\+\(\.\=\d*e[+-]\=\d\+\|\.\d*d\|\.\d*\|d\)"
+syn match idlangRealNumber "\.\d\+\(d\|e[+-]\=\d\+\)\="
+
+syn match idlangNumber "\<\.\@!\d\+\.\@!\(b\|u\|us\|s\|l\|ul\|ll\|ull\)\=\>"
+
+syn match idlangComment "[\;].*$" contains=idlangTodo
+
+syn match idlangContinueLine "\$\s*\($\|;\)"he=s+1 contains=idlangComment
+syn match idlangContinueLine "&\s*\(\h\|;\)"he=s+1 contains=ALL
+
+syn match idlangDblCommaError "\,\s*\,"
+
+" List of standard routines as of IDL version 5.4.
+syn match idlangRoutine "EOS_\a*"
+syn match idlangRoutine "HDF_\a*"
+syn match idlangRoutine "CDF_\a*"
+syn match idlangRoutine "NCDF_\a*"
+syn match idlangRoutine "QUERY_\a*"
+syn match idlangRoutine "\<MAX\s*("he=e-1
+syn match idlangRoutine "\<MIN\s*("he=e-1
+
+syn keyword idlangRoutine A_CORRELATE ABS ACOS ADAPT_HIST_EQUAL ALOG ALOG10
+syn keyword idlangRoutine AMOEBA ANNOTATE ARG_PRESENT ARRAY_EQUAL ARROW
+syn keyword idlangRoutine ASCII_TEMPLATE ASIN ASSOC ATAN AXIS BAR_PLOT
+syn keyword idlangRoutine BESELI BESELJ BESELK BESELY BETA BILINEAR BIN_DATE
+syn keyword idlangRoutine BINARY_TEMPLATE BINDGEN BINOMIAL BLAS_AXPY BLK_CON
+syn keyword idlangRoutine BOX_CURSOR BREAK BREAKPOINT BROYDEN BYTARR BYTE
+syn keyword idlangRoutine BYTEORDER BYTSCL C_CORRELATE CALDAT CALENDAR
+syn keyword idlangRoutine CALL_EXTERNAL CALL_FUNCTION CALL_METHOD
+syn keyword idlangRoutine CALL_PROCEDURE CATCH CD CEIL CHEBYSHEV CHECK_MATH
+syn keyword idlangRoutine CHISQR_CVF CHISQR_PDF CHOLDC CHOLSOL CINDGEN
+syn keyword idlangRoutine CIR_3PNT CLOSE CLUST_WTS CLUSTER COLOR_CONVERT
+syn keyword idlangRoutine COLOR_QUAN COLORMAP_APPLICABLE COMFIT COMMON
+syn keyword idlangRoutine COMPLEX COMPLEXARR COMPLEXROUND
+syn keyword idlangRoutine COMPUTE_MESH_NORMALS COND CONGRID CONJ
+syn keyword idlangRoutine CONSTRAINED_MIN CONTOUR CONVERT_COORD CONVOL
+syn keyword idlangRoutine COORD2TO3 CORRELATE COS COSH CRAMER CREATE_STRUCT
+syn keyword idlangRoutine CREATE_VIEW CROSSP CRVLENGTH CT_LUMINANCE CTI_TEST
+syn keyword idlangRoutine CURSOR CURVEFIT CV_COORD CVTTOBM CW_ANIMATE
+syn keyword idlangRoutine CW_ANIMATE_GETP CW_ANIMATE_LOAD CW_ANIMATE_RUN
+syn keyword idlangRoutine CW_ARCBALL CW_BGROUP CW_CLR_INDEX CW_COLORSEL
+syn keyword idlangRoutine CW_DEFROI CW_FIELD CW_FILESEL CW_FORM CW_FSLIDER
+syn keyword idlangRoutine CW_LIGHT_EDITOR CW_LIGHT_EDITOR_GET
+syn keyword idlangRoutine CW_LIGHT_EDITOR_SET CW_ORIENT CW_PALETTE_EDITOR
+syn keyword idlangRoutine CW_PALETTE_EDITOR_GET CW_PALETTE_EDITOR_SET
+syn keyword idlangRoutine CW_PDMENU CW_RGBSLIDER CW_TMPL CW_ZOOM DBLARR
+syn keyword idlangRoutine DCINDGEN DCOMPLEX DCOMPLEXARR DEFINE_KEY DEFROI
+syn keyword idlangRoutine DEFSYSV DELETE_SYMBOL DELLOG DELVAR DERIV DERIVSIG
+syn keyword idlangRoutine DETERM DEVICE DFPMIN DIALOG_MESSAGE
+syn keyword idlangRoutine DIALOG_PICKFILE DIALOG_PRINTERSETUP
+syn keyword idlangRoutine DIALOG_PRINTJOB DIALOG_READ_IMAGE
+syn keyword idlangRoutine DIALOG_WRITE_IMAGE DIGITAL_FILTER DILATE DINDGEN
+syn keyword idlangRoutine DISSOLVE DIST DLM_LOAD DLM_REGISTER
+syn keyword idlangRoutine DO_APPLE_SCRIPT DOC_LIBRARY DOUBLE DRAW_ROI EFONT
+syn keyword idlangRoutine EIGENQL EIGENVEC ELMHES EMPTY ENABLE_SYSRTN EOF
+syn keyword idlangRoutine ERASE ERODE ERRORF ERRPLOT EXECUTE EXIT EXP EXPAND
+syn keyword idlangRoutine EXPAND_PATH EXPINT EXTRAC EXTRACT_SLICE F_CVF
+syn keyword idlangRoutine F_PDF FACTORIAL FFT FILE_CHMOD FILE_DELETE
+syn keyword idlangRoutine FILE_EXPAND_PATH FILE_MKDIR FILE_TEST FILE_WHICH
+syn keyword idlangRoutine FILEPATH FINDFILE FINDGEN FINITE FIX FLICK FLOAT
+syn keyword idlangRoutine FLOOR FLOW3 FLTARR FLUSH FORMAT_AXIS_VALUES
+syn keyword idlangRoutine FORWARD_FUNCTION FREE_LUN FSTAT FULSTR FUNCT
+syn keyword idlangRoutine FV_TEST FX_ROOT FZ_ROOTS GAMMA GAMMA_CT
+syn keyword idlangRoutine GAUSS_CVF GAUSS_PDF GAUSS2DFIT GAUSSFIT GAUSSINT
+syn keyword idlangRoutine GET_DRIVE_LIST GET_KBRD GET_LUN GET_SCREEN_SIZE
+syn keyword idlangRoutine GET_SYMBOL GETENV GOTO GRID_TPS GRID3 GS_ITER
+syn keyword idlangRoutine H_EQ_CT H_EQ_INT HANNING HEAP_GC HELP HILBERT
+syn keyword idlangRoutine HIST_2D HIST_EQUAL HISTOGRAM HLS HOUGH HQR HSV
+syn keyword idlangRoutine IBETA IDENTITY IDL_Container IDLanROI
+syn keyword idlangRoutine IDLanROIGroup IDLffDICOM IDLffDXF IDLffLanguageCat
+syn keyword idlangRoutine IDLffShape IDLgrAxis IDLgrBuffer IDLgrClipboard
+syn keyword idlangRoutine IDLgrColorbar IDLgrContour IDLgrFont IDLgrImage
+syn keyword idlangRoutine IDLgrLegend IDLgrLight IDLgrModel IDLgrMPEG
+syn keyword idlangRoutine IDLgrPalette IDLgrPattern IDLgrPlot IDLgrPolygon
+syn keyword idlangRoutine IDLgrPolyline IDLgrPrinter IDLgrROI IDLgrROIGroup
+syn keyword idlangRoutine IDLgrScene IDLgrSurface IDLgrSymbol
+syn keyword idlangRoutine IDLgrTessellator IDLgrText IDLgrView
+syn keyword idlangRoutine IDLgrViewgroup IDLgrVolume IDLgrVRML IDLgrWindow
+syn keyword idlangRoutine IGAMMA IMAGE_CONT IMAGE_STATISTICS IMAGINARY
+syn keyword idlangRoutine INDGEN INT_2D INT_3D INT_TABULATED INTARR INTERPOL
+syn keyword idlangRoutine INTERPOLATE INVERT IOCTL ISHFT ISOCONTOUR
+syn keyword idlangRoutine ISOSURFACE JOURNAL JULDAY KEYWORD_SET KRIG2D
+syn keyword idlangRoutine KURTOSIS KW_TEST L64INDGEN LABEL_DATE LABEL_REGION
+syn keyword idlangRoutine LADFIT LAGUERRE LEEFILT LEGENDRE LINBCG LINDGEN
+syn keyword idlangRoutine LINFIT LINKIMAGE LIVE_CONTOUR LIVE_CONTROL
+syn keyword idlangRoutine LIVE_DESTROY LIVE_EXPORT LIVE_IMAGE LIVE_INFO
+syn keyword idlangRoutine LIVE_LINE LIVE_LOAD LIVE_OPLOT LIVE_PLOT
+syn keyword idlangRoutine LIVE_PRINT LIVE_RECT LIVE_STYLE LIVE_SURFACE
+syn keyword idlangRoutine LIVE_TEXT LJLCT LL_ARC_DISTANCE LMFIT LMGR LNGAMMA
+syn keyword idlangRoutine LNP_TEST LOADCT LOCALE_GET LON64ARR LONARR LONG
+syn keyword idlangRoutine LONG64 LSODE LU_COMPLEX LUDC LUMPROVE LUSOL
+syn keyword idlangRoutine M_CORRELATE MACHAR MAKE_ARRAY MAKE_DLL MAP_2POINTS
+syn keyword idlangRoutine MAP_CONTINENTS MAP_GRID MAP_IMAGE MAP_PATCH
+syn keyword idlangRoutine MAP_PROJ_INFO MAP_SET MATRIX_MULTIPLY MD_TEST MEAN
+syn keyword idlangRoutine MEANABSDEV MEDIAN MEMORY MESH_CLIP MESH_DECIMATE
+syn keyword idlangRoutine MESH_ISSOLID MESH_MERGE MESH_NUMTRIANGLES MESH_OBJ
+syn keyword idlangRoutine MESH_SMOOTH MESH_SURFACEAREA MESH_VALIDATE
+syn keyword idlangRoutine MESH_VOLUME MESSAGE MIN_CURVE_SURF MK_HTML_HELP
+syn keyword idlangRoutine MODIFYCT MOMENT MORPH_CLOSE MORPH_DISTANCE
+syn keyword idlangRoutine MORPH_GRADIENT MORPH_HITORMISS MORPH_OPEN
+syn keyword idlangRoutine MORPH_THIN MORPH_TOPHAT MPEG_CLOSE MPEG_OPEN
+syn keyword idlangRoutine MPEG_PUT MPEG_SAVE MSG_CAT_CLOSE MSG_CAT_COMPILE
+syn keyword idlangRoutine MSG_CAT_OPEN MULTI N_ELEMENTS N_PARAMS N_TAGS
+syn keyword idlangRoutine NEWTON NORM OBJ_CLASS OBJ_DESTROY OBJ_ISA OBJ_NEW
+syn keyword idlangRoutine OBJ_VALID OBJARR ON_ERROR ON_IOERROR ONLINE_HELP
+syn keyword idlangRoutine OPEN OPENR OPENW OPLOT OPLOTERR P_CORRELATE
+syn keyword idlangRoutine PARTICLE_TRACE PCOMP PLOT PLOT_3DBOX PLOT_FIELD
+syn keyword idlangRoutine PLOTERR PLOTS PNT_LINE POINT_LUN POLAR_CONTOUR
+syn keyword idlangRoutine POLAR_SURFACE POLY POLY_2D POLY_AREA POLY_FIT
+syn keyword idlangRoutine POLYFILL POLYFILLV POLYSHADE POLYWARP POPD POWELL
+syn keyword idlangRoutine PRIMES PRINT PRINTF PRINTD PROFILE PROFILER
+syn keyword idlangRoutine PROFILES PROJECT_VOL PS_SHOW_FONTS PSAFM PSEUDO
+syn keyword idlangRoutine PTR_FREE PTR_NEW PTR_VALID PTRARR PUSHD QROMB
+syn keyword idlangRoutine QROMO QSIMP R_CORRELATE R_TEST RADON RANDOMN
+syn keyword idlangRoutine RANDOMU RANKS RDPIX READ READF READ_ASCII
+syn keyword idlangRoutine READ_BINARY READ_BMP READ_DICOM READ_IMAGE
+syn keyword idlangRoutine READ_INTERFILE READ_JPEG READ_PICT READ_PNG
+syn keyword idlangRoutine READ_PPM READ_SPR READ_SRF READ_SYLK READ_TIFF
+syn keyword idlangRoutine READ_WAV READ_WAVE READ_X11_BITMAP READ_XWD READS
+syn keyword idlangRoutine READU REBIN RECALL_COMMANDS RECON3 REDUCE_COLORS
+syn keyword idlangRoutine REFORM REGRESS REPLICATE REPLICATE_INPLACE
+syn keyword idlangRoutine RESOLVE_ALL RESOLVE_ROUTINE RESTORE RETALL RETURN
+syn keyword idlangRoutine REVERSE REWIND RK4 ROBERTS ROT ROTATE ROUND
+syn keyword idlangRoutine ROUTINE_INFO RS_TEST S_TEST SAVE SAVGOL SCALE3
+syn keyword idlangRoutine SCALE3D SEARCH2D SEARCH3D SET_PLOT SET_SHADING
+syn keyword idlangRoutine SET_SYMBOL SETENV SETLOG SETUP_KEYS SFIT
+syn keyword idlangRoutine SHADE_SURF SHADE_SURF_IRR SHADE_VOLUME SHIFT SHOW3
+syn keyword idlangRoutine SHOWFONT SIN SINDGEN SINH SIZE SKEWNESS SKIPF
+syn keyword idlangRoutine SLICER3 SLIDE_IMAGE SMOOTH SOBEL SOCKET SORT SPAWN
+syn keyword idlangRoutine SPH_4PNT SPH_SCAT SPHER_HARM SPL_INIT SPL_INTERP
+syn keyword idlangRoutine SPLINE SPLINE_P SPRSAB SPRSAX SPRSIN SPRSTP SQRT
+syn keyword idlangRoutine STANDARDIZE STDDEV STOP STRARR STRCMP STRCOMPRESS
+syn keyword idlangRoutine STREAMLINE STREGEX STRETCH STRING STRJOIN STRLEN
+syn keyword idlangRoutine STRLOWCASE STRMATCH STRMESSAGE STRMID STRPOS
+syn keyword idlangRoutine STRPUT STRSPLIT STRTRIM STRUCT_ASSIGN STRUCT_HIDE
+syn keyword idlangRoutine STRUPCASE SURFACE SURFR SVDC SVDFIT SVSOL
+syn keyword idlangRoutine SWAP_ENDIAN SWITCH SYSTIME T_CVF T_PDF T3D
+syn keyword idlangRoutine TAG_NAMES TAN TANH TAPRD TAPWRT TEK_COLOR
+syn keyword idlangRoutine TEMPORARY TETRA_CLIP TETRA_SURFACE TETRA_VOLUME
+syn keyword idlangRoutine THIN THREED TIME_TEST2 TIMEGEN TM_TEST TOTAL TRACE
+syn keyword idlangRoutine TRANSPOSE TRI_SURF TRIANGULATE TRIGRID TRIQL
+syn keyword idlangRoutine TRIRED TRISOL TRNLOG TS_COEF TS_DIFF TS_FCAST
+syn keyword idlangRoutine TS_SMOOTH TV TVCRS TVLCT TVRD TVSCL UINDGEN UINT
+syn keyword idlangRoutine UINTARR UL64INDGEN ULINDGEN ULON64ARR ULONARR
+syn keyword idlangRoutine ULONG ULONG64 UNIQ USERSYM VALUE_LOCATE VARIANCE
+syn keyword idlangRoutine VAX_FLOAT VECTOR_FIELD VEL VELOVECT VERT_T3D VOIGT
+syn keyword idlangRoutine VORONOI VOXEL_PROJ WAIT WARP_TRI WATERSHED WDELETE
+syn keyword idlangRoutine WEOF WF_DRAW WHERE WIDGET_BASE WIDGET_BUTTON
+syn keyword idlangRoutine WIDGET_CONTROL WIDGET_DRAW WIDGET_DROPLIST
+syn keyword idlangRoutine WIDGET_EVENT WIDGET_INFO WIDGET_LABEL WIDGET_LIST
+syn keyword idlangRoutine WIDGET_SLIDER WIDGET_TABLE WIDGET_TEXT WINDOW
+syn keyword idlangRoutine WRITE_BMP WRITE_IMAGE WRITE_JPEG WRITE_NRIF
+syn keyword idlangRoutine WRITE_PICT WRITE_PNG WRITE_PPM WRITE_SPR WRITE_SRF
+syn keyword idlangRoutine WRITE_SYLK WRITE_TIFF WRITE_WAV WRITE_WAVE WRITEU
+syn keyword idlangRoutine WSET WSHOW WTN WV_APPLET WV_CW_WAVELET WV_CWT
+syn keyword idlangRoutine WV_DENOISE WV_DWT WV_FN_COIFLET WV_FN_DAUBECHIES
+syn keyword idlangRoutine WV_FN_GAUSSIAN WV_FN_HAAR WV_FN_MORLET WV_FN_PAUL
+syn keyword idlangRoutine WV_FN_SYMLET WV_IMPORT_DATA WV_IMPORT_WAVELET
+syn keyword idlangRoutine WV_PLOT3D_WPS WV_PLOT_MULTIRES WV_PWT
+syn keyword idlangRoutine WV_TOOL_DENOISE XBM_EDIT XDISPLAYFILE XDXF XFONT
+syn keyword idlangRoutine XINTERANIMATE XLOADCT XMANAGER XMNG_TMPL XMTOOL
+syn keyword idlangRoutine XOBJVIEW XPALETTE XPCOLOR XPLOT3D XREGISTERED XROI
+syn keyword idlangRoutine XSQ_TEST XSURFACE XVAREDIT XVOLUME XVOLUME_ROTATE
+syn keyword idlangRoutine XVOLUME_WRITE_IMAGE XYOUTS ZOOM ZOOM_24
+
+" Define the default highlighting.
+" Only when an item doesn't have highlighting yet
+
+hi def link idlangConditional Conditional
+hi def link idlangRoutine Type
+hi def link idlangStatement Statement
+hi def link idlangContinueLine Todo
+hi def link idlangRealNumber Float
+hi def link idlangNumber Number
+hi def link idlangString String
+hi def link idlangOperator Operator
+hi def link idlangComment Comment
+hi def link idlangTodo Todo
+hi def link idlangPreCondit Identifier
+hi def link idlangDblCommaError Error
+hi def link idlangStop Error
+hi def link idlangStrucvar PreProc
+hi def link idlangSystem Identifier
+hi def link idlangKeyword Special
+
+
+let b:current_syntax = "idlang"
+" vim: ts=18