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@@ -0,0 +1,678 @@
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+///<reference path="../../../headers/common.d.ts" />
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+
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+import _ from 'lodash';
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+
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+// This is auto generated from the unicode tables.
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+// The tables are at:
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+// http://www.fileformat.info/info/unicode/category/Lu/list.htm
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+// http://www.fileformat.info/info/unicode/category/Ll/list.htm
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+// http://www.fileformat.info/info/unicode/category/Lt/list.htm
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+// http://www.fileformat.info/info/unicode/category/Lm/list.htm
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+// http://www.fileformat.info/info/unicode/category/Lo/list.htm
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+// http://www.fileformat.info/info/unicode/category/Nl/list.htm
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+
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+var unicodeLetterTable = [
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+ 170, 170, 181, 181, 186, 186, 192, 214,
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+ 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750,
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+ 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908,
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+ 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366,
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+ 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610,
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+ 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775,
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+ 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957,
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+ 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069,
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+ 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2308, 2361,
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+ 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431,
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+ 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482,
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+ 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529,
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+ 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608,
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+ 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654,
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+ 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736,
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+ 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785,
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+ 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867,
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+ 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929,
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+ 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970,
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+ 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001,
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+ 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123,
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+ 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212,
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+ 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261,
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+ 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344,
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+ 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455,
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+ 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526,
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+ 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716,
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+ 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743,
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+ 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760,
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+ 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805,
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+ 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138,
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+ 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198,
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+ 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4304, 4346,
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+ 4348, 4348, 4352, 4680, 4682, 4685, 4688, 4694, 4696, 4696,
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+ 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789,
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+ 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880,
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+ 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740,
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+ 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900,
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+ 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000,
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+ 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312,
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+ 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516,
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+ 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823,
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+ 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7104, 7141,
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+ 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409,
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+ 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013,
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+ 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061,
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+ 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140,
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+ 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188,
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+ 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455,
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+ 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486,
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+ 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521,
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+ 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358,
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+ 11360, 11492, 11499, 11502, 11520, 11557, 11568, 11621,
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+ 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694,
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+ 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726,
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+ 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295,
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+ 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438,
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+ 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589,
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+ 12593, 12686, 12704, 12730, 12784, 12799, 13312, 13312,
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+ 19893, 19893, 19968, 19968, 40907, 40907, 40960, 42124,
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+ 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539,
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+ 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783,
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+ 42786, 42888, 42891, 42894, 42896, 42897, 42912, 42921,
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+ 43002, 43009, 43011, 43013, 43015, 43018, 43020, 43042,
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+ 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259,
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+ 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442,
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+ 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595,
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+ 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697,
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+ 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714,
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+ 43739, 43741, 43777, 43782, 43785, 43790, 43793, 43798,
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+ 43808, 43814, 43816, 43822, 43968, 44002, 44032, 44032,
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+ 55203, 55203, 55216, 55238, 55243, 55291, 63744, 64045,
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+ 64048, 64109, 64112, 64217, 64256, 64262, 64275, 64279,
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+ 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316,
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+ 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433,
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+ 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019,
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+ 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370,
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+ 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495,
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+ 65498, 65500, 65536, 65547, 65549, 65574, 65576, 65594,
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+ 65596, 65597, 65599, 65613, 65616, 65629, 65664, 65786,
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+ 65856, 65908, 66176, 66204, 66208, 66256, 66304, 66334,
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+ 66352, 66378, 66432, 66461, 66464, 66499, 66504, 66511,
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+ 66513, 66517, 66560, 66717, 67584, 67589, 67592, 67592,
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+ 67594, 67637, 67639, 67640, 67644, 67644, 67647, 67669,
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+ 67840, 67861, 67872, 67897, 68096, 68096, 68112, 68115,
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+ 68117, 68119, 68121, 68147, 68192, 68220, 68352, 68405,
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+ 68416, 68437, 68448, 68466, 68608, 68680, 69635, 69687,
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+ 69763, 69807, 73728, 74606, 74752, 74850, 77824, 78894,
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+ 92160, 92728, 110592, 110593, 119808, 119892, 119894, 119964,
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+ 119966, 119967, 119970, 119970, 119973, 119974, 119977, 119980,
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+ 119982, 119993, 119995, 119995, 119997, 120003, 120005, 120069,
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+ 120071, 120074, 120077, 120084, 120086, 120092, 120094, 120121,
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+ 120123, 120126, 120128, 120132, 120134, 120134, 120138, 120144,
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+ 120146, 120485, 120488, 120512, 120514, 120538, 120540, 120570,
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+ 120572, 120596, 120598, 120628, 120630, 120654, 120656, 120686,
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+ 120688, 120712, 120714, 120744, 120746, 120770, 120772, 120779,
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+ 131072, 131072, 173782, 173782, 173824, 173824, 177972, 177972,
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+ 177984, 177984, 178205, 178205, 194560, 195101
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+];
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+
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+var identifierStartTable = [];
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+
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+for (var i = 0; i < 128; i++) {
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+ identifierStartTable[i] =
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+ i >= 48 && i <= 57 || // 0-9
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+ i === 36 || // $
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+ i === 126 || // ~
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+ i === 124 || // |
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+ i >= 65 && i <= 90 || // A-Z
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+ i === 95 || // _
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+ i === 45 || // -
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+ i === 42 || // *
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+ i === 58 || // :
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+ i === 91 || // templateStart [
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+ i === 93 || // templateEnd ]
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+ i === 63 || // ?
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+ i === 37 || // %
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+ i === 35 || // #
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+ i === 61 || // =
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+ i >= 97 && i <= 122; // a-z
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+}
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+
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+var identifierPartTable = [];
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+
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+for (var i2 = 0; i2 < 128; i2++) {
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+ identifierPartTable[i2] =
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+ identifierStartTable[i2] || // $, _, A-Z, a-z
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+ i2 >= 48 && i2 <= 57; // 0-9
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+}
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+
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+export function Lexer(expression) {
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+ this.input = expression;
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+ this.char = 1;
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+ this.from = 1;
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+}
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+
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+Lexer.prototype = {
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+
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+ peek: function (i) {
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+ return this.input.charAt(i || 0);
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+ },
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+
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+ skip: function (i) {
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+ i = i || 1;
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+ this.char += i;
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+ this.input = this.input.slice(i);
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+ },
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+
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+ tokenize: function() {
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+ var list = [];
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+ var token;
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+ while (token = this.next()) {
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+ list.push(token);
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+ }
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+ return list;
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+ },
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+
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+ next: function() {
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+ this.from = this.char;
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+
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+ // Move to the next non-space character.
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+ var start;
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+ if (/\s/.test(this.peek())) {
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+ start = this.char;
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+
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+ while (/\s/.test(this.peek())) {
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+ this.from += 1;
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+ this.skip();
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+ }
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+
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+ if (this.peek() === "") { // EOL
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+ return null;
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+ }
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+ }
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+
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+ var match = this.scanStringLiteral();
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+ if (match) {
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+ return match;
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+ }
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+
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+ match =
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+ this.scanPunctuator() ||
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+ this.scanNumericLiteral() ||
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+ this.scanIdentifier() ||
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+ this.scanTemplateSequence();
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+
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+ if (match) {
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+ this.skip(match.value.length);
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+ return match;
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+ }
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+
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+ // No token could be matched, give up.
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+ return null;
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+ },
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+
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+ scanTemplateSequence: function() {
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+ if (this.peek() === '[' && this.peek(1) === '[') {
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+ return {
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+ type: 'templateStart',
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+ value: '[[',
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+ pos: this.char
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+ };
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+ }
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+
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+ if (this.peek() === ']' && this.peek(1) === ']') {
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+ return {
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+ type: 'templateEnd',
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+ value: '[[',
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+ pos: this.char
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+ };
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+ }
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+
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+ return null;
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+ },
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+
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+ /*
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+ * Extract a JavaScript identifier out of the next sequence of
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+ * characters or return 'null' if its not possible. In addition,
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+ * to Identifier this method can also produce BooleanLiteral
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+ * (true/false) and NullLiteral (null).
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+ */
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+ scanIdentifier: function() {
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+ var id = "";
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+ var index = 0;
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+ var type, char;
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+
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+ // Detects any character in the Unicode categories "Uppercase
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+ // letter (Lu)", "Lowercase letter (Ll)", "Titlecase letter
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+ // (Lt)", "Modifier letter (Lm)", "Other letter (Lo)", or
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+ // "Letter number (Nl)".
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+ //
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+ // Both approach and unicodeLetterTable were borrowed from
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+ // Google's Traceur.
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+
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+ function isUnicodeLetter(code) {
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+ for (var i = 0; i < unicodeLetterTable.length;) {
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+ if (code < unicodeLetterTable[i++]) {
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+ return false;
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+ }
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+
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+ if (code <= unicodeLetterTable[i++]) {
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+ return true;
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+ }
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+ }
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+
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+ return false;
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+ }
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+
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+ function isHexDigit(str) {
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+ return (/^[0-9a-fA-F]$/).test(str);
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+ }
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+
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+ var readUnicodeEscapeSequence = _.bind(function () {
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+ /*jshint validthis:true */
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+ index += 1;
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+
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+ if (this.peek(index) !== "u") {
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+ return null;
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+ }
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+
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+ var ch1 = this.peek(index + 1);
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+ var ch2 = this.peek(index + 2);
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+ var ch3 = this.peek(index + 3);
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+ var ch4 = this.peek(index + 4);
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+ var code;
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+
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+ if (isHexDigit(ch1) && isHexDigit(ch2) && isHexDigit(ch3) && isHexDigit(ch4)) {
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+ code = parseInt(ch1 + ch2 + ch3 + ch4, 16);
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+
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+ if (isUnicodeLetter(code)) {
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+ index += 5;
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+ return "\\u" + ch1 + ch2 + ch3 + ch4;
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+ }
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+
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+ return null;
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+ }
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+
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+ return null;
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+ }, this);
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+
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+ var getIdentifierStart = _.bind(function () {
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+ /*jshint validthis:true */
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+ var chr = this.peek(index);
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+ var code = chr.charCodeAt(0);
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+
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+ if (chr === '*') {
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+ index += 1;
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+ return chr;
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+ }
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+
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+ if (code === 92) {
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+ return readUnicodeEscapeSequence();
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+ }
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+
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+ if (code < 128) {
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+ if (identifierStartTable[code]) {
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+ index += 1;
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+ return chr;
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+ }
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+
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+ return null;
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+ }
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+
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+ if (isUnicodeLetter(code)) {
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+ index += 1;
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+ return chr;
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+ }
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+
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+ return null;
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+ }, this);
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+
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+ var getIdentifierPart = _.bind(function () {
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+ /*jshint validthis:true */
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+ var chr = this.peek(index);
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+ var code = chr.charCodeAt(0);
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+
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+ if (code === 92) {
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+ return readUnicodeEscapeSequence();
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+ }
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+
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+ if (code < 128) {
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+ if (identifierPartTable[code]) {
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|
|
+ index += 1;
|
|
|
+ return chr;
|
|
|
+ }
|
|
|
+
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (isUnicodeLetter(code)) {
|
|
|
+ index += 1;
|
|
|
+ return chr;
|
|
|
+ }
|
|
|
+
|
|
|
+ return null;
|
|
|
+ }, this);
|
|
|
+
|
|
|
+ char = getIdentifierStart();
|
|
|
+ if (char === null) {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+
|
|
|
+ id = char;
|
|
|
+ for (;;) {
|
|
|
+ char = getIdentifierPart();
|
|
|
+
|
|
|
+ if (char === null) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ id += char;
|
|
|
+ }
|
|
|
+
|
|
|
+ switch (id) {
|
|
|
+ case 'true': {
|
|
|
+ type = 'bool';
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ case 'false': {
|
|
|
+ type = 'bool';
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ default:
|
|
|
+ type = "identifier";
|
|
|
+ }
|
|
|
+
|
|
|
+ return {
|
|
|
+ type: type,
|
|
|
+ value: id,
|
|
|
+ pos: this.char
|
|
|
+ };
|
|
|
+
|
|
|
+ },
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Extract a numeric literal out of the next sequence of
|
|
|
+ * characters or return 'null' if its not possible. This method
|
|
|
+ * supports all numeric literals described in section 7.8.3
|
|
|
+ * of the EcmaScript 5 specification.
|
|
|
+ *
|
|
|
+ * This method's implementation was heavily influenced by the
|
|
|
+ * scanNumericLiteral function in the Esprima parser's source code.
|
|
|
+ */
|
|
|
+ scanNumericLiteral: function (): any {
|
|
|
+ var index = 0;
|
|
|
+ var value = "";
|
|
|
+ var length = this.input.length;
|
|
|
+ var char = this.peek(index);
|
|
|
+ var bad;
|
|
|
+
|
|
|
+ function isDecimalDigit(str) {
|
|
|
+ return (/^[0-9]$/).test(str);
|
|
|
+ }
|
|
|
+
|
|
|
+ function isOctalDigit(str) {
|
|
|
+ return (/^[0-7]$/).test(str);
|
|
|
+ }
|
|
|
+
|
|
|
+ function isHexDigit(str) {
|
|
|
+ return (/^[0-9a-fA-F]$/).test(str);
|
|
|
+ }
|
|
|
+
|
|
|
+ function isIdentifierStart(ch) {
|
|
|
+ return (ch === "$") || (ch === "_") || (ch === "\\") ||
|
|
|
+ (ch >= "a" && ch <= "z") || (ch >= "A" && ch <= "Z");
|
|
|
+ }
|
|
|
+
|
|
|
+ // handle negative num literals
|
|
|
+ if (char === '-') {
|
|
|
+ value += char;
|
|
|
+ index += 1;
|
|
|
+ char = this.peek(index);
|
|
|
+ }
|
|
|
+
|
|
|
+ // Numbers must start either with a decimal digit or a point.
|
|
|
+ if (char !== "." && !isDecimalDigit(char)) {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (char !== ".") {
|
|
|
+ value += this.peek(index);
|
|
|
+ index += 1;
|
|
|
+ char = this.peek(index);
|
|
|
+
|
|
|
+ if (value === "0") {
|
|
|
+ // Base-16 numbers.
|
|
|
+ if (char === "x" || char === "X") {
|
|
|
+ index += 1;
|
|
|
+ value += char;
|
|
|
+
|
|
|
+ while (index < length) {
|
|
|
+ char = this.peek(index);
|
|
|
+ if (!isHexDigit(char)) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ value += char;
|
|
|
+ index += 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (value.length <= 2) { // 0x
|
|
|
+ return {
|
|
|
+ type: 'number',
|
|
|
+ value: value,
|
|
|
+ isMalformed: true,
|
|
|
+ pos: this.char
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ if (index < length) {
|
|
|
+ char = this.peek(index);
|
|
|
+ if (isIdentifierStart(char)) {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return {
|
|
|
+ type: 'number',
|
|
|
+ value: value,
|
|
|
+ base: 16,
|
|
|
+ isMalformed: false,
|
|
|
+ pos: this.char
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // Base-8 numbers.
|
|
|
+ if (isOctalDigit(char)) {
|
|
|
+ index += 1;
|
|
|
+ value += char;
|
|
|
+ bad = false;
|
|
|
+
|
|
|
+ while (index < length) {
|
|
|
+ char = this.peek(index);
|
|
|
+
|
|
|
+ // Numbers like '019' (note the 9) are not valid octals
|
|
|
+ // but we still parse them and mark as malformed.
|
|
|
+
|
|
|
+ if (isDecimalDigit(char)) {
|
|
|
+ bad = true;
|
|
|
+ } else if (!isOctalDigit(char)) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ value += char;
|
|
|
+ index += 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (index < length) {
|
|
|
+ char = this.peek(index);
|
|
|
+ if (isIdentifierStart(char)) {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return {
|
|
|
+ type: 'number',
|
|
|
+ value: value,
|
|
|
+ base: 8,
|
|
|
+ isMalformed: false
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ // Decimal numbers that start with '0' such as '09' are illegal
|
|
|
+ // but we still parse them and return as malformed.
|
|
|
+
|
|
|
+ if (isDecimalDigit(char)) {
|
|
|
+ index += 1;
|
|
|
+ value += char;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ while (index < length) {
|
|
|
+ char = this.peek(index);
|
|
|
+ if (!isDecimalDigit(char)) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ value += char;
|
|
|
+ index += 1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Decimal digits.
|
|
|
+
|
|
|
+ if (char === ".") {
|
|
|
+ value += char;
|
|
|
+ index += 1;
|
|
|
+
|
|
|
+ while (index < length) {
|
|
|
+ char = this.peek(index);
|
|
|
+ if (!isDecimalDigit(char)) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ value += char;
|
|
|
+ index += 1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Exponent part.
|
|
|
+
|
|
|
+ if (char === "e" || char === "E") {
|
|
|
+ value += char;
|
|
|
+ index += 1;
|
|
|
+ char = this.peek(index);
|
|
|
+
|
|
|
+ if (char === "+" || char === "-") {
|
|
|
+ value += this.peek(index);
|
|
|
+ index += 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ char = this.peek(index);
|
|
|
+ if (isDecimalDigit(char)) {
|
|
|
+ value += char;
|
|
|
+ index += 1;
|
|
|
+
|
|
|
+ while (index < length) {
|
|
|
+ char = this.peek(index);
|
|
|
+ if (!isDecimalDigit(char)) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ value += char;
|
|
|
+ index += 1;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (index < length) {
|
|
|
+ char = this.peek(index);
|
|
|
+ if (!this.isPunctuator(char)) {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return {
|
|
|
+ type: 'number',
|
|
|
+ value: value,
|
|
|
+ base: 10,
|
|
|
+ pos: this.char,
|
|
|
+ isMalformed: !isFinite(+value)
|
|
|
+ };
|
|
|
+ },
|
|
|
+
|
|
|
+ isPunctuator: function (ch1) {
|
|
|
+ switch (ch1) {
|
|
|
+ case ".":
|
|
|
+ case "(":
|
|
|
+ case ")":
|
|
|
+ case ",":
|
|
|
+ case "{":
|
|
|
+ case "}":
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ return false;
|
|
|
+ },
|
|
|
+
|
|
|
+ scanPunctuator: function () {
|
|
|
+ var ch1 = this.peek();
|
|
|
+
|
|
|
+ if (this.isPunctuator(ch1)) {
|
|
|
+ return {
|
|
|
+ type: ch1,
|
|
|
+ value: ch1,
|
|
|
+ pos: this.char
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ return null;
|
|
|
+ },
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Extract a string out of the next sequence of characters and/or
|
|
|
+ * lines or return 'null' if its not possible. Since strings can
|
|
|
+ * span across multiple lines this method has to move the char
|
|
|
+ * pointer.
|
|
|
+ *
|
|
|
+ * This method recognizes pseudo-multiline JavaScript strings:
|
|
|
+ *
|
|
|
+ * var str = "hello\
|
|
|
+ * world";
|
|
|
+ */
|
|
|
+ scanStringLiteral: function () {
|
|
|
+ /*jshint loopfunc:true */
|
|
|
+ var quote = this.peek();
|
|
|
+
|
|
|
+ // String must start with a quote.
|
|
|
+ if (quote !== "\"" && quote !== "'") {
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+
|
|
|
+ var value = "";
|
|
|
+
|
|
|
+ this.skip();
|
|
|
+
|
|
|
+ while (this.peek() !== quote) {
|
|
|
+ if (this.peek() === "") { // End Of Line
|
|
|
+ return {
|
|
|
+ type: 'string',
|
|
|
+ value: value,
|
|
|
+ isUnclosed: true,
|
|
|
+ quote: quote,
|
|
|
+ pos: this.char
|
|
|
+ };
|
|
|
+ }
|
|
|
+
|
|
|
+ var char = this.peek();
|
|
|
+ var jump = 1; // A length of a jump, after we're done
|
|
|
+ // parsing this character.
|
|
|
+
|
|
|
+ value += char;
|
|
|
+ this.skip(jump);
|
|
|
+ }
|
|
|
+
|
|
|
+ this.skip();
|
|
|
+ return {
|
|
|
+ type: 'string',
|
|
|
+ value: value,
|
|
|
+ isUnclosed: false,
|
|
|
+ quote: quote,
|
|
|
+ pos: this.char
|
|
|
+ };
|
|
|
+ },
|
|
|
+
|
|
|
+ };
|
|
|
+
|