capitalex zrewidował ten Gist . Przejdź do rewizji
1 file changed, 230 insertions
nova-parser.lua(stworzono plik)
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| 1 | + | local pprint = require "pprint" | |
| 2 | + | local None = {} | |
| 3 | + | local whitespace = { | |
| 4 | + | [' '] = true, | |
| 5 | + | ['\n'] = true, | |
| 6 | + | ['\r'] = true, | |
| 7 | + | ['\t'] = true, | |
| 8 | + | } | |
| 9 | + | local yield, wrap = coroutine.yield, coroutine.wrap | |
| 10 | + | ||
| 11 | + | local function gen(t) | |
| 12 | + | return wrap(function() | |
| 13 | + | for i, v in ipairs(t) do | |
| 14 | + | yield(i, v) | |
| 15 | + | end | |
| 16 | + | end) | |
| 17 | + | end | |
| 18 | + | local function iter(f) | |
| 19 | + | return function(arg) | |
| 20 | + | return wrap(function () f(arg) end) | |
| 21 | + | end | |
| 22 | + | end | |
| 23 | + | ||
| 24 | + | local function chars(string) | |
| 25 | + | local cs = {} | |
| 26 | + | for char in string:gmatch(".") do | |
| 27 | + | table.insert(cs, char) | |
| 28 | + | end | |
| 29 | + | return cs | |
| 30 | + | end | |
| 31 | + | ||
| 32 | + | local function copy(t) | |
| 33 | + | local t_copy = {} | |
| 34 | + | for k, v in pairs(t) do | |
| 35 | + | t_copy[k] = v | |
| 36 | + | end | |
| 37 | + | return t_copy | |
| 38 | + | end | |
| 39 | + | ||
| 40 | + | local function append(a, b) | |
| 41 | + | local appended = {} | |
| 42 | + | for _, v in ipairs(a) do | |
| 43 | + | table.insert(appended, v) | |
| 44 | + | end | |
| 45 | + | for _, v in ipairs(b) do | |
| 46 | + | table.insert(appended, v) | |
| 47 | + | end | |
| 48 | + | return appended | |
| 49 | + | end | |
| 50 | + | ||
| 51 | + | local function clear(t) | |
| 52 | + | for k, v in pairs(t) do | |
| 53 | + | t[k] = nil | |
| 54 | + | end | |
| 55 | + | end | |
| 56 | + | ||
| 57 | + | local function insert(t, what) | |
| 58 | + | table.insert(t, what) | |
| 59 | + | return t | |
| 60 | + | end | |
| 61 | + | ||
| 62 | + | local parser_container = iter(function(string) | |
| 63 | + | local left = {} | |
| 64 | + | local right = {} | |
| 65 | + | local target = left | |
| 66 | + | local characters = gen(insert(chars(string), None)) | |
| 67 | + | local delimiter = None | |
| 68 | + | ||
| 69 | + | for _, character in characters do | |
| 70 | + | if not whitespace[character] then | |
| 71 | + | delimiter = character | |
| 72 | + | break | |
| 73 | + | end | |
| 74 | + | ||
| 75 | + | end | |
| 76 | + | if delimiter == None then | |
| 77 | + | return None | |
| 78 | + | end | |
| 79 | + | ||
| 80 | + | for _, character in characters do | |
| 81 | + | if character == delimiter or character == None then | |
| 82 | + | if target == left then | |
| 83 | + | target = right | |
| 84 | + | else | |
| 85 | + | target = left | |
| 86 | + | yield(copy(left), copy(right)) | |
| 87 | + | clear(left) clear(right) | |
| 88 | + | end | |
| 89 | + | else | |
| 90 | + | table.insert(target, character) | |
| 91 | + | end | |
| 92 | + | end | |
| 93 | + | end) | |
| 94 | + | ||
| 95 | + | local parse_labels = iter(function(rules) | |
| 96 | + | local left = {} | |
| 97 | + | local right = {} | |
| 98 | + | local pair = {{}, {}} | |
| 99 | + | local target = left | |
| 100 | + | local delimiter = None | |
| 101 | + | for condition, result in rules do | |
| 102 | + | for _, side in ipairs({condition, result}) do | |
| 103 | + | local characters = gen(insert(side, None)) | |
| 104 | + | local state = "find delimiter" | |
| 105 | + | for _, character in characters do | |
| 106 | + | if character == None then | |
| 107 | + | local label = table.concat(pair[1]):match "^%s*(.-)%s*$" | |
| 108 | + | local pattern = table.concat(pair[2]):match "^%s*(.-)%s*$" | |
| 109 | + | if not (#label == 0 and #pattern == 0) then | |
| 110 | + | table.insert(target, {label, pattern}) | |
| 111 | + | end | |
| 112 | + | clear(pair[1]) clear(pair[2]) | |
| 113 | + | break | |
| 114 | + | elseif state == "find delimiter" then | |
| 115 | + | if not whitespace[character] then | |
| 116 | + | delimiter = character | |
| 117 | + | state = "parse label" | |
| 118 | + | end | |
| 119 | + | elseif state == "parse label" then | |
| 120 | + | if character == delimiter then | |
| 121 | + | state = "parse pattern" | |
| 122 | + | else | |
| 123 | + | table.insert(pair[1], character) | |
| 124 | + | end | |
| 125 | + | elseif state == "parse pattern" then | |
| 126 | + | if character == delimiter or character == None then | |
| 127 | + | state = "parse label" | |
| 128 | + | local label = table.concat(pair[1]):match "^%s*(.-)%s*$" | |
| 129 | + | local pattern = table.concat(pair[2]):match "^%s*(.-)%s*$" | |
| 130 | + | if not (#label == 0 and #pattern == 0) then | |
| 131 | + | table.insert(target, {label, pattern}) | |
| 132 | + | end | |
| 133 | + | clear(pair[1]) clear(pair[2]) | |
| 134 | + | else | |
| 135 | + | table.insert(pair[2], character) | |
| 136 | + | end | |
| 137 | + | end | |
| 138 | + | end | |
| 139 | + | if target == left then | |
| 140 | + | target = right | |
| 141 | + | else | |
| 142 | + | target = left | |
| 143 | + | end | |
| 144 | + | end | |
| 145 | + | yield(copy(left), copy(right)) | |
| 146 | + | clear(left) clear(right) | |
| 147 | + | end | |
| 148 | + | end) | |
| 149 | + | ||
| 150 | + | local parse_patterns = iter(function(rules) | |
| 151 | + | for conditions, results in rules do | |
| 152 | + | local left = {} | |
| 153 | + | local right = {} | |
| 154 | + | local preserves = {} | |
| 155 | + | for _, condition in ipairs(conditions) do | |
| 156 | + | local label, pattern = condition[1], condition[2] | |
| 157 | + | local preserve = false | |
| 158 | + | if pattern:match("%?$") then | |
| 159 | + | pattern = pattern:sub(1, -2) | |
| 160 | + | preserve = true | |
| 161 | + | end | |
| 162 | + | if pattern:match("^[\"'](.*)[\"']$") then | |
| 163 | + | for i, character in ipairs(chars(pattern:match("^[\"'](.*)[\"\']$"))) do | |
| 164 | + | table.insert(left, {label, {tostring(string.byte(character))}}) | |
| 165 | + | if preserves then | |
| 166 | + | table.insert(right, {label, {tostring(string.byte(character))}}) | |
| 167 | + | end | |
| 168 | + | end | |
| 169 | + | elseif pattern:match("^%((.*)%)$") then | |
| 170 | + | for token in pattern:match("^%((.*)%)$"):gmatch("%S+") do | |
| 171 | + | table.insert(left, {label, {token}}) | |
| 172 | + | if preserve then | |
| 173 | + | table.insert(right, {label, {token}}) | |
| 174 | + | end | |
| 175 | + | end | |
| 176 | + | elseif pattern:find("^%.") then | |
| 177 | + | -- TODO | |
| 178 | + | else | |
| 179 | + | local words = {} | |
| 180 | + | for word in pattern:gmatch("%S+") do | |
| 181 | + | table.insert(words, word) | |
| 182 | + | end | |
| 183 | + | table.insert(left, {label, words}) | |
| 184 | + | if preserve then | |
| 185 | + | table.insert(preserves, {label, words}) | |
| 186 | + | end | |
| 187 | + | end | |
| 188 | + | end | |
| 189 | + | ||
| 190 | + | for _, result in ipairs(results) do | |
| 191 | + | local label, pattern = result[1], result[2] | |
| 192 | + | ||
| 193 | + | if pattern:match("^[\"'](.*)[\"']$") then | |
| 194 | + | for i, character in ipairs(chars(pattern:match("^[\"'](.*)[\"\']$"))) do | |
| 195 | + | table.insert(right, {label, {tostring(string.byte(character))}}) | |
| 196 | + | end | |
| 197 | + | elseif pattern:match("^%((.*)%)$") then | |
| 198 | + | for token in pattern:match("^%((.*)%)$"):gmatch("%S+") do | |
| 199 | + | table.insert(right, {label, {token}}) | |
| 200 | + | end | |
| 201 | + | elseif pattern:find("^%.") then | |
| 202 | + | -- TODO | |
| 203 | + | else | |
| 204 | + | local words = {} | |
| 205 | + | for word in pattern:gmatch("%S+") do | |
| 206 | + | table.insert(words, word) | |
| 207 | + | end | |
| 208 | + | table.insert(right, {label, words}) | |
| 209 | + | end | |
| 210 | + | end | |
| 211 | + | ||
| 212 | + | yield(copy(left), append(right, preserves)) | |
| 213 | + | clear(left) clear(right) clear(preserves) | |
| 214 | + | end | |
| 215 | + | end) | |
| 216 | + | ||
| 217 | + | local file = io.open("main.nv", "r") | |
| 218 | + | for left, right in parse_patterns(parse_labels(parser_container(file:read("*a")))) do | |
| 219 | + | io.write("|") | |
| 220 | + | local left_pattern = {} | |
| 221 | + | for _, pattern in ipairs(left) do | |
| 222 | + | table.insert(left_pattern, ":" .. pattern[1] .. ": " .. table.concat(pattern[2], " ")) | |
| 223 | + | end | |
| 224 | + | io.write(table.concat(left_pattern, " ")) | |
| 225 | + | io.write("|\n") | |
| 226 | + | for _, pattern in ipairs(right) do | |
| 227 | + | print("", ":" .. pattern[1] .. ": " .. table.concat(pattern[2], " ")) | |
| 228 | + | end | |
| 229 | + | io.write("\n") | |
| 230 | + | end | |
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