tweak is_operator_start_char to not use so heavily nested syntax (#208

)

src/utilities.jl

@@ -245,8 +245,12 @@ function optakessuffix(k)
     )
 end
 
+# It is unknown where this array comes from...
+const startchars = ['!', '$', '%', '&', '\'', '*', '+', '-', '.', '/', ':', '<', '=', '>', '?', '\\', '^', 'i', 'w', '|', '~', '¬', '±', '×', '÷', '…', '⁝', '⅋', '←', '↑', '→', '↓', '↔', '↚', '↛', '↠', '↣', '↦', '↮', '⇎', '⇏', '⇒', '⇔', '⇴', '⇵', '⇶', '⇷', '⇸', '⇹', '⇺', '⇻', '⇼', '⇽', '⇾', '⇿', '∈', '∉', '∊', '∋', '∌', '∍', '∓', '∔', '∗', '∘', '∙', '√', '∛', '∜', '∝', '∤', '∥', '∦', '∧', '∨', '∩', '∪', '∷', '∸', '∺', '∻', '∽', '∾', '≀', '≁', '≂', '≃', '≄', '≅', '≆', '≇', '≈', '≉', '≊', '≋', '≌', '≍', '≎', '≏', '≐', '≑', '≒', '≓', '≔', '≕', '≖', '≗', '≘', '≙', '≚', '≛', '≜', '≝', '≞', '≟', '≠', '≡', '≢', '≣', '≤', '≥', '≦', '≧', '≨', '≩', '≪', '≫', '≬', '≭', '≮', '≯', '≰', '≱', '≲', '≳', '≴', '≵', '≶', '≷', '≸', '≹', '≺', '≻', '≼', '≽', '≾', '≿', '⊀', '⊁', '⊂', '⊃', '⊄', '⊅', '⊆', '⊇', '⊈', '⊉', '⊊', '⊋', '⊍', '⊎', '⊏', '⊐', '⊑', '⊒', '⊓', '⊔', '⊕', '⊖', '⊗', '⊘', '⊙', '⊚', '⊛', '⊜', '⊞', '⊟', '⊠', '⊡', '⊢', '⊣', '⊩', '⊬', '⊮', '⊰', '⊱', '⊲', '⊳', '⊴', '⊵', '⊶', '⊷', '⊻', '⊼', '⊽', '⋄', '⋅', '⋆', '⋇', '⋉', '⋊', '⋋', '⋌', '⋍', '⋎', '⋏', '⋐', '⋑', '⋒', '⋓', '⋕', '⋖', '⋗', '⋘', '⋙', '⋚', '⋛', '⋜', '⋝', '⋞', '⋟', '⋠', '⋡', '⋢', '⋣', '⋤', '⋥', '⋦', '⋧', '⋨', '⋩', '⋪', '⋫', '⋬', '⋭', '⋮', '⋯', '⋰', '⋱', '⋲', '⋳', '⋴', '⋵', '⋶', '⋷', '⋸', '⋹', '⋺', '⋻', '⋼', '⋽', '⋾', '⋿', '▷', '⟂', '⟈', '⟉', '⟑', '⟒', '⟕', '⟖', '⟗', '⟰', '⟱', '⟵', '⟶', '⟷', '⟹', '⟺', '⟻', '⟼', '⟽', '⟾', '⟿', '⤀', '⤁', '⤂', '⤃', '⤄', '⤅', '⤆', '⤇', '⤈', '⤉', '⤊', '⤋', '⤌', '⤍', '⤎', '⤏', '⤐', '⤑', '⤒', '⤓', '⤔', '⤕', '⤖', '⤗', '⤘', '⤝', '⤞', '⤟', '⤠', '⥄', '⥅', '⥆', '⥇', '⥈', '⥉', '⥊', '⥋', '⥌', '⥍', '⥎', '⥏', '⥐', '⥑', '⥒', '⥓', '⥔', '⥕', '⥖', '⥗', '⥘', '⥙', '⥚', '⥛', '⥜', '⥝', '⥞', '⥟', '⥠', '⥡', '⥢', '⥣', '⥤', '⥥', '⥦', '⥧', '⥨', '⥩', '⥪', '⥫', '⥬', '⥭', '⥮', '⥯', '⥰', '⦷', '⦸', '⦼', '⦾', '⦿', '⧀', '⧁', '⧡', '⧣', '⧤', '⧥', '⧴', '⧶', '⧷', '⧺', '⧻', '⨇', '⨈', '⨝', '⨢', '⨣', '⨤', '⨥', '⨦', '⨧', '⨨', '⨩', '⨪', '⨫', '⨬', '⨭', '⨮', '⨰', '⨱', '⨲', '⨳', '⨴', '⨵', '⨶', '⨷', '⨸', '⨹', '⨺', '⨻', '⨼', '⨽', '⩀', '⩁', '⩂', '⩃', '⩄', '⩅', '⩊', '⩋', '⩌', '⩍', '⩎', '⩏', '⩐', '⩑', '⩒', '⩓', '⩔', '⩕', '⩖', '⩗', '⩘', '⩚', '⩛', '⩜', '⩝', '⩞', '⩟', '⩠', '⩡', '⩢', '⩣', '⩦', '⩧', '⩪', '⩫', '⩬', '⩭', '⩮', '⩯', '⩰', '⩱', '⩲', '⩳', '⩴', '⩵', '⩶', '⩷', '⩸', '⩹', '⩺', '⩻', '⩼', '⩽', '⩾', '⩿', '⪀', '⪁', '⪂', '⪃', '⪄', '⪅', '⪆', '⪇', '⪈', '⪉', '⪊', '⪋', '⪌', '⪍', '⪎', '⪏', '⪐', '⪑', '⪒', '⪓', '⪔', '⪕', '⪖', '⪗', '⪘', '⪙', '⪚', '⪛', '⪜', '⪝', '⪞', '⪟', '⪠', '⪡', '⪢', '⪣', '⪤', '⪥', '⪦', '⪧', '⪨', '⪩', '⪪', '⪫', '⪬', '⪭', '⪮', '⪯', '⪰', '⪱', '⪲', '⪳', '⪴', '⪵', '⪶', '⪷', '⪸', '⪹', '⪺', '⪻', '⪼', '⪽', '⪾', '⪿', '⫀', '⫁', '⫂', '⫃', '⫄', '⫅', '⫆', '⫇', '⫈', '⫉', '⫊', '⫋', '⫌', '⫍', '⫎', '⫏', '⫐', '⫑', '⫒', '⫓', '⫔', '⫕', '⫖', '⫗', '⫘', '⫙', '⫛', '⫷', '⫸', '⫹', '⫺', '⬰', '⬱', '⬲', '⬳', '⬴', '⬵', '⬶', '⬷', '⬸', '⬹', '⬺', '⬻', '⬼', '⬽', '⬾', '⬿', '⭀', '⭁', '⭂', '⭃', '⭄', '⭇', '⭈', '⭉', '⭊', '⭋', '⭌', '￩', '￪', '￫', '￬']
+
+@assert issorted(startchars)
+
 function is_operator_start_char(c::Char)
     eof(c) && return false
-    is_operator_start_char(UInt32(c))
+    return !isempty(searchsorted(startchars, c))
 end
-is_operator_start_char(u::UInt32) = u == 0x00000021 || (u == 0x00000024 || (u == 0x00000025 || (u == 0x00000026 || (u == 0x00000027 || (u == 0x0000002a || (u == 0x0000002b || (u == 0x0000002d || (u == 0x0000002e || (u == 0x0000002f || (u == 0x0000003a || (u == 0x0000003c || (u == 0x0000003d || (u == 0x0000003e || (u == 0x0000003f || (u == 0x0000005c || (u == 0x0000005e || (u == 0x00000069 || (u == 0x00000077 || (u == 0x0000007c || (u == 0x0000007e || (u == 0x000000ac || (u == 0x000000b1 || (u == 0x000000d7 || (u == 0x000000f7 || (u == 0x00002026 || (u == 0x0000205d || (u == 0x0000214b || (u == 0x00002190 || (u == 0x00002191 || (u == 0x00002192 || (u == 0x00002193 || (u == 0x00002194 || (u == 0x0000219a || (u == 0x0000219b || (u == 0x000021a0 || (u == 0x000021a3 || (u == 0x000021a6 || (u == 0x000021ae || (u == 0x000021ce || (u == 0x000021cf || (u == 0x000021d2 || (u == 0x000021d4 || (u == 0x000021f4 || (u == 0x000021f5 || (u == 0x000021f6 || (u == 0x000021f7 || (u == 0x000021f8 || (u == 0x000021f9 || (u == 0x000021fa || (u == 0x000021fb || (u == 0x000021fc || (u == 0x000021fd || (u == 0x000021fe || (u == 0x000021ff || (u == 0x00002208 || (u == 0x00002209 || (u == 0x0000220a || (u == 0x0000220b || (u == 0x0000220c || (u == 0x0000220d || (u == 0x00002213 || (u == 0x00002214 || (u == 0x00002217 || (u == 0x00002218 || (u == 0x00002219 || (u == 0x0000221a || (u == 0x0000221b || (u == 0x0000221c || (u == 0x0000221d || (u == 0x00002224 || (u == 0x00002225 || (u == 0x00002226 || (u == 0x00002227 || (u == 0x00002228 || (u == 0x00002229 || (u == 0x0000222a || (u == 0x00002237 || (u == 0x00002238 || (u == 0x0000223a || (u == 0x0000223b || (u == 0x0000223d || (u == 0x0000223e || (u == 0x00002240 || (u == 0x00002241 || (u == 0x00002242 || (u == 0x00002243 || (u == 0x00002244 || (u == 0x00002245 || (u == 0x00002246 || (u == 0x00002247 || (u == 0x00002248 || (u == 0x00002249 || (u == 0x0000224a || (u == 0x0000224b || (u == 0x0000224c || (u == 0x0000224d || (u == 0x0000224e || (u == 0x0000224f || (u == 0x00002250 || (u == 0x00002251 || (u == 0x00002252 || (u == 0x00002253 || (u == 0x00002254 || (u == 0x00002255 || (u == 0x00002256 || (u == 0x00002257 || (u == 0x00002258 || (u == 0x00002259 || (u == 0x0000225a || (u == 0x0000225b || (u == 0x0000225c || (u == 0x0000225d || (u == 0x0000225e || (u == 0x0000225f || (u == 0x00002260 || (u == 0x00002261 || (u == 0x00002262 || (u == 0x00002263 || (u == 0x00002264 || (u == 0x00002265 || (u == 0x00002266 || (u == 0x00002267 || (u == 0x00002268 || (u == 0x00002269 || (u == 0x0000226a || (u == 0x0000226b || (u == 0x0000226c || (u == 0x0000226d || (u == 0x0000226e || (u == 0x0000226f || (u == 0x00002270 || (u == 0x00002271 || (u == 0x00002272 || (u == 0x00002273 || (u == 0x00002274 || (u == 0x00002275 || (u == 0x00002276 || (u == 0x00002277 || (u == 0x00002278 || (u == 0x00002279 || (u == 0x0000227a || (u == 0x0000227b || (u == 0x0000227c || (u == 0x0000227d || (u == 0x0000227e || (u == 0x0000227f || (u == 0x00002280 || (u == 0x00002281 || (u == 0x00002282 || (u == 0x00002283 || (u == 0x00002284 || (u == 0x00002285 || (u == 0x00002286 || (u == 0x00002287 || (u == 0x00002288 || (u == 0x00002289 || (u == 0x0000228a || (u == 0x0000228b || (u == 0x0000228d || (u == 0x0000228e || (u == 0x0000228f || (u == 0x00002290 || (u == 0x00002291 || (u == 0x00002292 || (u == 0x00002293 || (u == 0x00002294 || (u == 0x00002295 || (u == 0x00002296 || (u == 0x00002297 || (u == 0x00002298 || (u == 0x00002299 || (u == 0x0000229a || (u == 0x0000229b || (u == 0x0000229c || (u == 0x0000229e || (u == 0x0000229f || (u == 0x000022a0 || (u == 0x000022a1 || (u == 0x000022a2 || (u == 0x000022a3 || (u == 0x000022a9 || (u == 0x000022ac || (u == 0x000022ae || (u == 0x000022b0 || (u == 0x000022b1 || (u == 0x000022b2 || (u == 0x000022b3 || (u == 0x000022b4 || (u == 0x000022b5 || (u == 0x000022b6 || (u == 0x000022b7 || (u == 0x000022bb || (u == 0x000022bc || (u == 0x000022bd || (u == 0x000022c4 || (u == 0x000022c5 || (u == 0x000022c6 || (u == 0x000022c7 || (u == 0x000022c9 || (u == 0x000022ca || (u == 0x000022cb || (u == 0x000022cc || (u == 0x000022cd || (u == 0x000022ce || (u == 0x000022cf || (u == 0x000022d0 || (u == 0x000022d1 || (u == 0x000022d2 || (u == 0x000022d3 || (u == 0x000022d5 || (u == 0x000022d6 || (u == 0x000022d7 || (u == 0x000022d8 || (u == 0x000022d9 || (u == 0x000022da || (u == 0x000022db || (u == 0x000022dc || (u == 0x000022dd || (u == 0x000022de || (u == 0x000022df || (u == 0x000022e0 || (u == 0x000022e1 || (u == 0x000022e2 || (u == 0x000022e3 || (u == 0x000022e4 || (u == 0x000022e5 || (u == 0x000022e6 || (u == 0x000022e7 || (u == 0x000022e8 || (u == 0x000022e9 || (u == 0x000022ea || (u == 0x000022eb || (u == 0x000022ec || (u == 0x000022ed || (u == 0x000022ee || (u == 0x000022ef || (u == 0x000022f0 || (u == 0x000022f1 || (u == 0x000022f2 || (u == 0x000022f3 || (u == 0x000022f4 || (u == 0x000022f5 || (u == 0x000022f6 || (u == 0x000022f7 || (u == 0x000022f8 || (u == 0x000022f9 || (u == 0x000022fa || (u == 0x000022fb || (u == 0x000022fc || (u == 0x000022fd || (u == 0x000022fe || (u == 0x000022ff || (u == 0x000025b7 || (u == 0x000027c2 || (u == 0x000027c8 || (u == 0x000027c9 || (u == 0x000027d1 || (u == 0x000027d2 || (u == 0x000027d5 || (u == 0x000027d6 || (u == 0x000027d7 || (u == 0x000027f0 || (u == 0x000027f1 || (u == 0x000027f5 || (u == 0x000027f6 || (u == 0x000027f7 || (u == 0x000027f9 || (u == 0x000027fa || (u == 0x000027fb || (u == 0x000027fc || (u == 0x000027fd || (u == 0x000027fe || (u == 0x000027ff || (u == 0x00002900 || (u == 0x00002901 || (u == 0x00002902 || (u == 0x00002903 || (u == 0x00002904 || (u == 0x00002905 || (u == 0x00002906 || (u == 0x00002907 || (u == 0x00002908 || (u == 0x00002909 || (u == 0x0000290a || (u == 0x0000290b || (u == 0x0000290c || (u == 0x0000290d || (u == 0x0000290e || (u == 0x0000290f || (u == 0x00002910 || (u == 0x00002911 || (u == 0x00002912 || (u == 0x00002913 || (u == 0x00002914 || (u == 0x00002915 || (u == 0x00002916 || (u == 0x00002917 || (u == 0x00002918 || (u == 0x0000291d || (u == 0x0000291e || (u == 0x0000291f || (u == 0x00002920 || (u == 0x00002944 || (u == 0x00002945 || (u == 0x00002946 || (u == 0x00002947 || (u == 0x00002948 || (u == 0x00002949 || (u == 0x0000294a || (u == 0x0000294b || (u == 0x0000294c || (u == 0x0000294d || (u == 0x0000294e || (u == 0x0000294f || (u == 0x00002950 || (u == 0x00002951 || (u == 0x00002952 || (u == 0x00002953 || (u == 0x00002954 || (u == 0x00002955 || (u == 0x00002956 || (u == 0x00002957 || (u == 0x00002958 || (u == 0x00002959 || (u == 0x0000295a || (u == 0x0000295b || (u == 0x0000295c || (u == 0x0000295d || (u == 0x0000295e || (u == 0x0000295f || (u == 0x00002960 || (u == 0x00002961 || (u == 0x00002962 || (u == 0x00002963 || (u == 0x00002964 || (u == 0x00002965 || (u == 0x00002966 || (u == 0x00002967 || (u == 0x00002968 || (u == 0x00002969 || (u == 0x0000296a || (u == 0x0000296b || (u == 0x0000296c || (u == 0x0000296d || (u == 0x0000296e || (u == 0x0000296f || (u == 0x00002970 || (u == 0x000029b7 || (u == 0x000029b8 || (u == 0x000029bc || (u == 0x000029be || (u == 0x000029bf || (u == 0x000029c0 || (u == 0x000029c1 || (u == 0x000029e1 || (u == 0x000029e3 || (u == 0x000029e4 || (u == 0x000029e5 || (u == 0x000029f4 || (u == 0x000029f6 || (u == 0x000029f7 || (u == 0x000029fa || (u == 0x000029fb || (u == 0x00002a07 || (u == 0x00002a08 || (u == 0x00002a1d || (u == 0x00002a22 || (u == 0x00002a23 || (u == 0x00002a24 || (u == 0x00002a25 || (u == 0x00002a26 || (u == 0x00002a27 || (u == 0x00002a28 || (u == 0x00002a29 || (u == 0x00002a2a || (u == 0x00002a2b || (u == 0x00002a2c || (u == 0x00002a2d || (u == 0x00002a2e || (u == 0x00002a30 || (u == 0x00002a31 || (u == 0x00002a32 || (u == 0x00002a33 || (u == 0x00002a34 || (u == 0x00002a35 || (u == 0x00002a36 || (u == 0x00002a37 || (u == 0x00002a38 || (u == 0x00002a39 || (u == 0x00002a3a || (u == 0x00002a3b || (u == 0x00002a3c || (u == 0x00002a3d || (u == 0x00002a40 || (u == 0x00002a41 || (u == 0x00002a42 || (u == 0x00002a43 || (u == 0x00002a44 || (u == 0x00002a45 || (u == 0x00002a4a || (u == 0x00002a4b || (u == 0x00002a4c || (u == 0x00002a4d || (u == 0x00002a4e || (u == 0x00002a4f || (u == 0x00002a50 || (u == 0x00002a51 || (u == 0x00002a52 || (u == 0x00002a53 || (u == 0x00002a54 || (u == 0x00002a55 || (u == 0x00002a56 || (u == 0x00002a57 || (u == 0x00002a58 || (u == 0x00002a5a || (u == 0x00002a5b || (u == 0x00002a5c || (u == 0x00002a5d || (u == 0x00002a5e || (u == 0x00002a5f || (u == 0x00002a60 || (u == 0x00002a61 || (u == 0x00002a62 || (u == 0x00002a63 || (u == 0x00002a66 || (u == 0x00002a67 || (u == 0x00002a6a || (u == 0x00002a6b || (u == 0x00002a6c || (u == 0x00002a6d || (u == 0x00002a6e || (u == 0x00002a6f || (u == 0x00002a70 || (u == 0x00002a71 || (u == 0x00002a72 || (u == 0x00002a73 || (u == 0x00002a74 || (u == 0x00002a75 || (u == 0x00002a76 || (u == 0x00002a77 || (u == 0x00002a78 || (u == 0x00002a79 || (u == 0x00002a7a || (u == 0x00002a7b || (u == 0x00002a7c || (u == 0x00002a7d || (u == 0x00002a7e || (u == 0x00002a7f || (u == 0x00002a80 || (u == 0x00002a81 || (u == 0x00002a82 || (u == 0x00002a83 || (u == 0x00002a84 || (u == 0x00002a85 || (u == 0x00002a86 || (u == 0x00002a87 || (u == 0x00002a88 || (u == 0x00002a89 || (u == 0x00002a8a || (u == 0x00002a8b || (u == 0x00002a8c || (u == 0x00002a8d || (u == 0x00002a8e || (u == 0x00002a8f || (u == 0x00002a90 || (u == 0x00002a91 || (u == 0x00002a92 || (u == 0x00002a93 || (u == 0x00002a94 || (u == 0x00002a95 || (u == 0x00002a96 || (u == 0x00002a97 || (u == 0x00002a98 || (u == 0x00002a99 || (u == 0x00002a9a || (u == 0x00002a9b || (u == 0x00002a9c || (u == 0x00002a9d || (u == 0x00002a9e || (u == 0x00002a9f || (u == 0x00002aa0 || (u == 0x00002aa1 || (u == 0x00002aa2 || (u == 0x00002aa3 || (u == 0x00002aa4 || (u == 0x00002aa5 || (u == 0x00002aa6 || (u == 0x00002aa7 || (u == 0x00002aa8 || (u == 0x00002aa9 || (u == 0x00002aaa || (u == 0x00002aab || (u == 0x00002aac || (u == 0x00002aad || (u == 0x00002aae || (u == 0x00002aaf || (u == 0x00002ab0 || (u == 0x00002ab1 || (u == 0x00002ab2 || (u == 0x00002ab3 || (u == 0x00002ab4 || (u == 0x00002ab5 || (u == 0x00002ab6 || (u == 0x00002ab7 || (u == 0x00002ab8 || (u == 0x00002ab9 || (u == 0x00002aba || (u == 0x00002abb || (u == 0x00002abc || (u == 0x00002abd || (u == 0x00002abe || (u == 0x00002abf || (u == 0x00002ac0 || (u == 0x00002ac1 || (u == 0x00002ac2 || (u == 0x00002ac3 || (u == 0x00002ac4 || (u == 0x00002ac5 || (u == 0x00002ac6 || (u == 0x00002ac7 || (u == 0x00002ac8 || (u == 0x00002ac9 || (u == 0x00002aca || (u == 0x00002acb || (u == 0x00002acc || (u == 0x00002acd || (u == 0x00002ace || (u == 0x00002acf || (u == 0x00002ad0 || (u == 0x00002ad1 || (u == 0x00002ad2 || (u == 0x00002ad3 || (u == 0x00002ad4 || (u == 0x00002ad5 || (u == 0x00002ad6 || (u == 0x00002ad7 || (u == 0x00002ad8 || (u == 0x00002ad9 || (u == 0x00002adb || (u == 0x00002af7 || (u == 0x00002af8 || (u == 0x00002af9 || (u == 0x00002afa || (u == 0x00002b30 || (u == 0x00002b31 || (u == 0x00002b32 || (u == 0x00002b33 || (u 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