mirror of
https://github.com/Reuh/anselme.git
synced 2025-10-27 16:49:31 +00:00
71 lines
2 KiB
Lua
71 lines
2 KiB
Lua
local escape_cache = {}
|
|
local ansicolors = require("lib.ansicolors")
|
|
|
|
local common = {
|
|
-- escape text to be used as an exact pattern
|
|
escape = function(str)
|
|
if not escape_cache[str] then
|
|
escape_cache[str] = str:gsub("[^%w]", "%%%1")
|
|
end
|
|
return escape_cache[str]
|
|
end,
|
|
--- transform an identifier into a clean version (trim each part)
|
|
trim = function(str)
|
|
return str:match("^%s*(.-)%s*$")
|
|
end,
|
|
fmt = function(str, ...)
|
|
return ansicolors(str):format(...)
|
|
end,
|
|
uuid = function()
|
|
return ("xxxxxxxx-xxxx-4xxx-Nxxx-xxxxxxxxxxxx") -- version 4
|
|
:gsub("N", math.random(0x8, 0xb)) -- variant 1
|
|
:gsub("x", function() return ("%x"):format(math.random(0x0, 0xf)) end) -- random hexadecimal digit
|
|
end,
|
|
-- list of operators and their priority that are handled through regular function calls & can be overloaded/etc. by the user
|
|
regular_operators = {
|
|
prefixes = {
|
|
{ "~", 3.5 }, -- just below _~_ so else-if (~ condition ~ expression) parses as (~ (condition ~ expression))
|
|
{ "!", 11 },
|
|
{ "-", 11 },
|
|
{ "*", 11 },
|
|
{ "%", 11 },
|
|
},
|
|
suffixes = {
|
|
{ ";", 1 },
|
|
{ "!", 12 }
|
|
},
|
|
infixes = {
|
|
{ ";", 1 },
|
|
{ "#", 2 }, { "->", 2 }, { "~>", 2 },
|
|
{ "~", 4 }, { "~?", 4 },
|
|
{ "|>", 5 }, { "&", 5 }, { "|", 5 },
|
|
{ "==", 7 }, { "!=", 7 }, { ">=", 7 }, { "<=", 7 }, { "<", 7 }, { ">", 7 },
|
|
{ "+", 8 }, { "-", 8 },
|
|
{ "//", 9 }, { "/", 9 }, { "*", 9 }, { "%", 9 },
|
|
{ "^", 10 },
|
|
{ "::", 11 },
|
|
{ ".", 14 },
|
|
{ ":", 5 }
|
|
}
|
|
},
|
|
-- list of all operators and their priority
|
|
operator_priority = {
|
|
[";_"] = 1,
|
|
["$_"] = 1,
|
|
["@_"] = 1,
|
|
["_,_"] = 2,
|
|
["_=_"] = 3,
|
|
["_!_"] = 12,
|
|
["_()"] = 13
|
|
-- generated at run-time for regular operators
|
|
}
|
|
}
|
|
|
|
local function store_priority(t, fmt)
|
|
for _, v in ipairs(t) do common.operator_priority[fmt:format(v[1])] = v[2] end
|
|
end
|
|
store_priority(common.regular_operators.infixes, "_%s_")
|
|
store_priority(common.regular_operators.prefixes, "%s_")
|
|
store_priority(common.regular_operators.suffixes, "_%s")
|
|
|
|
return common
|