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Ignore comments and long string in preprocessor

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This commit is contained in:
Étienne Fildadut 2018-08-08 17:38:44 +02:00
parent 7405a6f949
commit 30a10d6ed9
4 changed files with 218 additions and 173 deletions
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2
README.md
View file

@ -253,7 +253,7 @@ end
`if`, `elseif`, `for`, and `while` statements can be writtent without `do`, `then` or `end`, in which case they contain a single statement. `if`, `elseif`, `for`, and `while` statements can be writtent without `do`, `then` or `end`, in which case they contain a single statement.
### Preprocessor ### Preprocessor
Before compiling, Candran's preprocessor is run. It execute every line starting with a _#_ (ignoring whitespace) as Candran code. Before compiling, Candran's preprocessor is run. It execute every line starting with a _#_ (ignoring prefixing whitespace, long strings and comments) as Candran code.
For example, For example,
````lua ````lua

20
candran.can
View file

@ -34,13 +34,27 @@ function candran.preprocess(input, options={})
-- generate preprocessor code -- generate preprocessor code
local preprocessor = "" local preprocessor = ""
local i = 0 local i = 0
local inLongString = false
local inComment = false
for line in (input.."\n"):gmatch("(.-\n)") do for line in (input.."\n"):gmatch("(.-\n)") do
i += 1 i += 1
if line:match("^%s*#") and not line:match("^#!") then -- exclude shebang -- Simple multiline comment/string detection
if inComment then
inComment = not line:match("%]%]")
elseif inLongString then
inLongString = not line:match("%]%]")
else
if line:match("[^%-]%[%[") then
inLongString = true
elseif line:match("%-%-%[%[") then
inComment = true
end
end
if not inComment and not inLongString and line:match("^%s*#") and not line:match("^#!") then -- exclude shebang
preprocessor ..= line:gsub("^%s*#", "") preprocessor ..= line:gsub("^%s*#", "")
else else
local l = line:sub(1, -2) local l = line:sub(1, -2)
if options.mapLines and not l:match("%-%- (.-)%:(%d+)$") then if not inLongString and options.mapLines and not l:match("%-%- (.-)%:(%d+)$") then
preprocessor ..= ("write(%q)"):format(l .. " -- "..options.chunkname..":" .. i) .. "\n" preprocessor ..= ("write(%q)"):format(l .. " -- "..options.chunkname..":" .. i) .. "\n"
else else
preprocessor ..= ("write(%q)"):format(line:sub(1, -2)) .. "\n" preprocessor ..= ("write(%q)"):format(line:sub(1, -2)) .. "\n"
@ -218,9 +232,9 @@ function candran.messageHandler(message)
local fi = io.open(source, "r") local fi = io.open(source, "r")
if fi then if fi then
originalFile = fi:read("*a") originalFile = fi:read("*a")
end
fi:close() fi:close()
end end
end
if originalFile then if originalFile then
local i = 0 local i = 0

351
candran.lua
View file

@ -2921,190 +2921,203 @@ if options == nil then options = {} end -- candran.can:31
options = util["merge"](candran["default"], options) -- candran.can:32 options = util["merge"](candran["default"], options) -- candran.can:32
local preprocessor = "" -- candran.can:35 local preprocessor = "" -- candran.can:35
local i = 0 -- candran.can:36 local i = 0 -- candran.can:36
local inLongString = false -- candran.can:37
local inComment = false -- candran.can:38
for line in (input .. "\ for line in (input .. "\
"):gmatch("(.-\ "):gmatch("(.-\
)") do -- candran.can:37 )") do -- candran.can:39
i = i + (1) -- candran.can:38 i = i + (1) -- candran.can:40
if line:match("^%s*#") and not line:match("^#!") then -- exclude shebang -- candran.can:39 if inComment then -- candran.can:42
preprocessor = preprocessor .. (line:gsub("^%s*#", "")) -- candran.can:40 inComment = not line:match("%]%]") -- candran.can:43
else -- candran.can:40 elseif inLongString then -- candran.can:44
local l = line:sub(1, - 2) -- candran.can:42 inLongString = not line:match("%]%]") -- candran.can:45
if options["mapLines"] and not l:match("%-%- (.-)%:(%d+)$") then -- candran.can:43 else -- candran.can:45
if line:match("[^%-]%[%[") then -- candran.can:47
inLongString = true -- candran.can:48
elseif line:match("%-%-%[%[") then -- candran.can:49
inComment = true -- candran.can:50
end -- candran.can:50
end -- candran.can:50
if not inComment and not inLongString and line:match("^%s*#") and not line:match("^#!") then -- exclude shebang -- candran.can:53
preprocessor = preprocessor .. (line:gsub("^%s*#", "")) -- candran.can:54
else -- candran.can:54
local l = line:sub(1, - 2) -- candran.can:56
if not inLongString and options["mapLines"] and not l:match("%-%- (.-)%:(%d+)$") then -- candran.can:57
preprocessor = preprocessor .. (("write(%q)"):format(l .. " -- " .. options["chunkname"] .. ":" .. i) .. "\ preprocessor = preprocessor .. (("write(%q)"):format(l .. " -- " .. options["chunkname"] .. ":" .. i) .. "\
") -- candran.can:44 ") -- candran.can:58
else -- candran.can:44 else -- candran.can:58
preprocessor = preprocessor .. (("write(%q)"):format(line:sub(1, - 2)) .. "\ preprocessor = preprocessor .. (("write(%q)"):format(line:sub(1, - 2)) .. "\
") -- candran.can:46 ") -- candran.can:60
end -- candran.can:46 end -- candran.can:60
end -- candran.can:46 end -- candran.can:60
end -- candran.can:46 end -- candran.can:60
preprocessor = preprocessor .. ("return output") -- candran.can:50 preprocessor = preprocessor .. ("return output") -- candran.can:64
local env = util["merge"](_G, options) -- candran.can:53 local env = util["merge"](_G, options) -- candran.can:67
env["candran"] = candran -- candran.can:55 env["candran"] = candran -- candran.can:69
env["output"] = "" -- candran.can:57 env["output"] = "" -- candran.can:71
env["import"] = function(modpath, margs) -- candran.can:64 env["import"] = function(modpath, margs) -- candran.can:78
if margs == nil then margs = {} end -- candran.can:64 if margs == nil then margs = {} end -- candran.can:78
local filepath = assert(util["search"](modpath), "No module named \"" .. modpath .. "\"") -- candran.can:65 local filepath = assert(util["search"](modpath), "No module named \"" .. modpath .. "\"") -- candran.can:79
local f = io["open"](filepath) -- candran.can:68 local f = io["open"](filepath) -- candran.can:82
if not f then -- candran.can:69 if not f then -- candran.can:83
error("Can't open the module file to import") -- candran.can:69 error("Can't open the module file to import") -- candran.can:83
end -- candran.can:69 end -- candran.can:83
margs = util["merge"](options, { -- candran.can:71 margs = util["merge"](options, { -- candran.can:85
["chunkname"] = filepath, -- candran.can:71 ["chunkname"] = filepath, -- candran.can:85
["loadLocal"] = true, -- candran.can:71 ["loadLocal"] = true, -- candran.can:85
["loadPackage"] = true -- candran.can:71 ["loadPackage"] = true -- candran.can:85
}, margs) -- candran.can:71 }, margs) -- candran.can:85
local modcontent = candran["preprocess"](f:read("*a"), margs) -- candran.can:72 local modcontent = candran["preprocess"](f:read("*a"), margs) -- candran.can:86
f:close() -- candran.can:73 f:close() -- candran.can:87
local modname = modpath:match("[^%.]+$") -- candran.can:76 local modname = modpath:match("[^%.]+$") -- candran.can:90
env["write"]("-- MODULE " .. modpath .. " --\ env["write"]("-- MODULE " .. modpath .. " --\
" .. "local function _()\ " .. "local function _()\
" .. modcontent .. "\ " .. modcontent .. "\
" .. "end\ " .. "end\
" .. (margs["loadLocal"] and ("local %s = _() or %s\ " .. (margs["loadLocal"] and ("local %s = _() or %s\
"):format(modname, modname) or "") .. (margs["loadPackage"] and ("package.loaded[%q] = %s or true\ "):format(modname, modname) or "") .. (margs["loadPackage"] and ("package.loaded[%q] = %s or true\
"):format(modpath, margs["loadLocal"] and modname or "_()") or "") .. "-- END OF MODULE " .. modpath .. " --") -- candran.can:85 "):format(modpath, margs["loadLocal"] and modname or "_()") or "") .. "-- END OF MODULE " .. modpath .. " --") -- candran.can:99
end -- candran.can:85
env["include"] = function(file) -- candran.can:90
local f = io["open"](file) -- candran.can:91
if not f then -- candran.can:92
error("Can't open the file " .. file .. " to include") -- candran.can:92
end -- candran.can:92
env["write"](f:read("*a")) -- candran.can:93
f:close() -- candran.can:94
end -- candran.can:94
env["write"] = function(...) -- candran.can:98
env["output"] = env["output"] .. (table["concat"]({ ... }, "\9") .. "\
") -- candran.can:99
end -- candran.can:99 end -- candran.can:99
env["placeholder"] = function(name) -- candran.can:103 env["include"] = function(file) -- candran.can:104
if env[name] then -- candran.can:104 local f = io["open"](file) -- candran.can:105
env["write"](env[name]) -- candran.can:105 if not f then -- candran.can:106
end -- candran.can:105 error("Can't open the file " .. file .. " to include") -- candran.can:106
end -- candran.can:105 end -- candran.can:106
local preprocess, err = util["load"](candran["compile"](preprocessor, args), "candran preprocessor", env) -- candran.can:110 env["write"](f:read("*a")) -- candran.can:107
if not preprocess then -- candran.can:111 f:close() -- candran.can:108
error("Error while creating Candran preprocessor: " .. err) -- candran.can:111 end -- candran.can:108
end -- candran.can:111 env["write"] = function(...) -- candran.can:112
local success, output = pcall(preprocess) -- candran.can:114 env["output"] = env["output"] .. (table["concat"]({ ... }, "\9") .. "\
if not success then -- candran.can:115 ") -- candran.can:113
error("Error while preprocessing file: " .. output) -- candran.can:115 end -- candran.can:113
end -- candran.can:115 env["placeholder"] = function(name) -- candran.can:117
return output -- candran.can:117 if env[name] then -- candran.can:118
end -- candran.can:117 env["write"](env[name]) -- candran.can:119
candran["compile"] = function(input, options) -- candran.can:124 end -- candran.can:119
if options == nil then options = {} end -- candran.can:124 end -- candran.can:119
options = util["merge"](candran["default"], options) -- candran.can:125 local preprocess, err = util["load"](candran["compile"](preprocessor, args), "candran preprocessor", env) -- candran.can:124
local ast, errmsg = parser["parse"](input, options["chunkname"]) -- candran.can:127 if not preprocess then -- candran.can:125
if not ast then -- candran.can:129 error("Error while creating Candran preprocessor: " .. err) -- candran.can:125
error("Compiler: error while parsing file: " .. errmsg) -- candran.can:130 end -- candran.can:125
end -- candran.can:130 local success, output = pcall(preprocess) -- candran.can:128
return require("compiler." .. options["target"])(input, ast, options) -- candran.can:133 if not success then -- candran.can:129
end -- candran.can:133 error("Error while preprocessing file: " .. output) -- candran.can:129
candran["make"] = function(code, options) -- candran.can:140 end -- candran.can:129
return candran["compile"](candran["preprocess"](code, options), options) -- candran.can:141 return output -- candran.can:131
end -- candran.can:141 end -- candran.can:131
local errorRewritingActive = false -- candran.can:144 candran["compile"] = function(input, options) -- candran.can:138
local codeCache = {} -- candran.can:145 if options == nil then options = {} end -- candran.can:138
candran["loadfile"] = function(filepath, env, options) -- candran.can:148 options = util["merge"](candran["default"], options) -- candran.can:139
local f, err = io["open"](filepath) -- candran.can:149 local ast, errmsg = parser["parse"](input, options["chunkname"]) -- candran.can:141
if not f then -- candran.can:150 if not ast then -- candran.can:143
error("can't open the file: " .. err) -- candran.can:150 error("Compiler: error while parsing file: " .. errmsg) -- candran.can:144
end -- candran.can:150 end -- candran.can:144
local content = f:read("*a") -- candran.can:151 return require("compiler." .. options["target"])(input, ast, options) -- candran.can:147
f:close() -- candran.can:152 end -- candran.can:147
return candran["load"](content, filepath, env, options) -- candran.can:154 candran["make"] = function(code, options) -- candran.can:154
end -- candran.can:154 return candran["compile"](candran["preprocess"](code, options), options) -- candran.can:155
candran["load"] = function(chunk, chunkname, env, options) -- candran.can:159 end -- candran.can:155
if options == nil then options = {} end -- candran.can:159 local errorRewritingActive = false -- candran.can:158
options = util["merge"]({ ["chunkname"] = tostring(chunkname or chunk) }, options) -- candran.can:160 local codeCache = {} -- candran.can:159
codeCache[options["chunkname"]] = candran["make"](chunk, options) -- candran.can:162 candran["loadfile"] = function(filepath, env, options) -- candran.can:162
local f, err = util["load"](codeCache[options["chunkname"]], options["chunkname"], env) -- candran.can:163 local f, err = io["open"](filepath) -- candran.can:163
if f == nil then -- candran.can:168 if not f then -- candran.can:164
return f, "Candran unexpectedly generated invalid code: " .. err -- candran.can:169 error("can't open the file: " .. err) -- candran.can:164
end -- candran.can:169 end -- candran.can:164
if options["rewriteErrors"] == false then -- candran.can:172 local content = f:read("*a") -- candran.can:165
return f -- candran.can:173 f:close() -- candran.can:166
else -- candran.can:173 return candran["load"](content, filepath, env, options) -- candran.can:168
return function(...) -- candran.can:175 end -- candran.can:168
local params = { ... } -- candran.can:176 candran["load"] = function(chunk, chunkname, env, options) -- candran.can:173
if not errorRewritingActive then -- candran.can:177 if options == nil then options = {} end -- candran.can:173
errorRewritingActive = true -- candran.can:178 options = util["merge"]({ ["chunkname"] = tostring(chunkname or chunk) }, options) -- candran.can:174
local t = { xpcall(function() -- candran.can:179 codeCache[options["chunkname"]] = candran["make"](chunk, options) -- candran.can:176
return f(unpack(params)) -- candran.can:179 local f, err = util["load"](codeCache[options["chunkname"]], options["chunkname"], env) -- candran.can:177
end, candran["messageHandler"]) } -- candran.can:179 if f == nil then -- candran.can:182
errorRewritingActive = false -- candran.can:180 return f, "Candran unexpectedly generated invalid code: " .. err -- candran.can:183
if t[1] == false then -- candran.can:181 end -- candran.can:183
error(t[2], 0) -- candran.can:182 if options["rewriteErrors"] == false then -- candran.can:186
end -- candran.can:182 return f -- candran.can:187
return unpack(t, 2) -- candran.can:184 else -- candran.can:187
else -- candran.can:184 return function(...) -- candran.can:189
return f(...) -- candran.can:186 local params = { ... } -- candran.can:190
end -- candran.can:186 if not errorRewritingActive then -- candran.can:191
end -- candran.can:186 errorRewritingActive = true -- candran.can:192
end -- candran.can:186 local t = { xpcall(function() -- candran.can:193
end -- candran.can:186 return f(unpack(params)) -- candran.can:193
candran["dofile"] = function(filename, options) -- candran.can:194 end, candran["messageHandler"]) } -- candran.can:193
local f, err = candran["loadfile"](filename, nil, options) -- candran.can:195 errorRewritingActive = false -- candran.can:194
if f == nil then -- candran.can:197 if t[1] == false then -- candran.can:195
error(err) -- candran.can:198 error(t[2], 0) -- candran.can:196
end -- candran.can:196
return unpack(t, 2) -- candran.can:198
else -- candran.can:198 else -- candran.can:198
return f() -- candran.can:200 return f(...) -- candran.can:200
end -- candran.can:200 end -- candran.can:200
end -- candran.can:200 end -- candran.can:200
candran["messageHandler"] = function(message) -- candran.can:206 end -- candran.can:200
end -- candran.can:200
candran["dofile"] = function(filename, options) -- candran.can:208
local f, err = candran["loadfile"](filename, nil, options) -- candran.can:209
if f == nil then -- candran.can:211
error(err) -- candran.can:212
else -- candran.can:212
return f() -- candran.can:214
end -- candran.can:214
end -- candran.can:214
candran["messageHandler"] = function(message) -- candran.can:220
return debug["traceback"](message, 2):gsub("(\ return debug["traceback"](message, 2):gsub("(\
?%s*)([^\ ?%s*)([^\
]-)%:(%d+)%:", function(indentation, source, line) -- candran.can:207 ]-)%:(%d+)%:", function(indentation, source, line) -- candran.can:221
line = tonumber(line) -- candran.can:208 line = tonumber(line) -- candran.can:222
local originalFile -- candran.can:210 local originalFile -- candran.can:224
local strName = source:match("%[string \"(.-)\"%]") -- candran.can:211 local strName = source:match("%[string \"(.-)\"%]") -- candran.can:225
if strName then -- candran.can:212 if strName then -- candran.can:226
if codeCache[strName] then -- candran.can:213 if codeCache[strName] then -- candran.can:227
originalFile = codeCache[strName] -- candran.can:214 originalFile = codeCache[strName] -- candran.can:228
source = strName -- candran.can:215 source = strName -- candran.can:229
end -- candran.can:215 end -- candran.can:229
else -- candran.can:215 else -- candran.can:229
local fi = io["open"](source, "r") -- candran.can:218 local fi = io["open"](source, "r") -- candran.can:232
if fi then -- candran.can:219 if fi then -- candran.can:233
originalFile = fi:read("*a") -- candran.can:220 originalFile = fi:read("*a") -- candran.can:234
end -- candran.can:220 fi:close() -- candran.can:235
fi:close() -- candran.can:222 end -- candran.can:235
end -- candran.can:222 end -- candran.can:235
if originalFile then -- candran.can:225 if originalFile then -- candran.can:239
local i = 0 -- candran.can:226 local i = 0 -- candran.can:240
for l in originalFile:gmatch("([^\ for l in originalFile:gmatch("([^\
]*)") do -- candran.can:227 ]*)") do -- candran.can:241
i = i + 1 -- candran.can:228 i = i + 1 -- candran.can:242
if i == line then -- candran.can:229 if i == line then -- candran.can:243
local extSource, lineMap = l:match("%-%- (.-)%:(%d+)$") -- candran.can:230 local extSource, lineMap = l:match("%-%- (.-)%:(%d+)$") -- candran.can:244
if lineMap then -- candran.can:231 if lineMap then -- candran.can:245
if extSource ~= source then -- candran.can:232 if extSource ~= source then -- candran.can:246
return indentation .. extSource .. ":" .. lineMap .. "(" .. extSource .. ":" .. line .. "):" -- candran.can:233 return indentation .. extSource .. ":" .. lineMap .. "(" .. extSource .. ":" .. line .. "):" -- candran.can:247
else -- candran.can:233 else -- candran.can:247
return indentation .. extSource .. ":" .. lineMap .. "(" .. line .. "):" -- candran.can:235 return indentation .. extSource .. ":" .. lineMap .. "(" .. line .. "):" -- candran.can:249
end -- candran.can:235
end -- candran.can:235
break -- candran.can:238
end -- candran.can:238
end -- candran.can:238
end -- candran.can:238
end) -- candran.can:238
end -- candran.can:238
candran["searcher"] = function(modpath) -- candran.can:246
local filepath = util["search"](modpath, { "can" }) -- candran.can:247
if not filepath then -- candran.can:248
return "\
\9no candran file in package.path" -- candran.can:249
end -- candran.can:249 end -- candran.can:249
return candran["loadfile"](filepath) -- candran.can:251 end -- candran.can:249
end -- candran.can:251 break -- candran.can:252
candran["setup"] = function() -- candran.can:255 end -- candran.can:252
if _VERSION == "Lua 5.1" then -- candran.can:256 end -- candran.can:252
table["insert"](package["loaders"], 2, candran["searcher"]) -- candran.can:257 end -- candran.can:252
else -- candran.can:257 end) -- candran.can:252
table["insert"](package["searchers"], 2, candran["searcher"]) -- candran.can:259 end -- candran.can:252
end -- candran.can:259 candran["searcher"] = function(modpath) -- candran.can:260
return candran -- candran.can:261 local filepath = util["search"](modpath, { "can" }) -- candran.can:261
end -- candran.can:261 if not filepath then -- candran.can:262
return candran -- candran.can:264 return "\
\9no candran file in package.path" -- candran.can:263
end -- candran.can:263
return candran["loadfile"](filepath) -- candran.can:265
end -- candran.can:265
candran["setup"] = function() -- candran.can:269
if _VERSION == "Lua 5.1" then -- candran.can:270
table["insert"](package["loaders"], 2, candran["searcher"]) -- candran.can:271
else -- candran.can:271
table["insert"](package["searchers"], 2, candran["searcher"]) -- candran.can:273
end -- candran.can:273
return candran -- candran.can:275
end -- candran.can:275
return candran -- candran.can:278

18
test/test.lua
View file

@ -95,6 +95,24 @@ test("preprocessor options", [[
return true return true
]], true, { foo = "sky" }) ]], true, { foo = "sky" })
test("preprocessor long comment", [[
--[[
#error("preprocessor should ignore long comments")
]].."]]"..[[
return true
]], true)
test("preprocessor long comment in long string", [[
a=]].."[["..[[
--[[
#error("preprocessor should ignore long strings")
]].."]]"..[[
return a
]], [[
--[[
#error("preprocessor should ignore long strings")
]])
---------------------- ----------------------
-- SYNTAX ADDITIONS -- -- SYNTAX ADDITIONS --
---------------------- ----------------------