123 lines
4.6 KiB
Lua
123 lines
4.6 KiB
Lua
-- mod-version:3
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local syntax = require "core.syntax"
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-- Regex pattern explanation:
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-- This will match / and will look ahead for something that looks like a regex.
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--
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-- (?!/) Don't match empty regexes.
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--
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-- (?>...) this is using an atomic group to minimize backtracking, as that'd
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-- cause "Catastrophic Backtracking" in some cases.
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--
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-- [^\\[\/]++ will match anything that's isn't an escape, a start of character
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-- class or an end of pattern, without backtracking (the second +).
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--
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-- \\. will match anything that's escaped.
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--
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-- \[(?:[^\\\]++]|\\.)*+\] will match character classes.
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--
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-- /[gmiyuvsd]*\s*[\n,;\)\]\}\.]) will match the end of pattern delimiter, optionally
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-- followed by pattern options, and anything that can
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-- be after a pattern.
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--
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-- Demo with some unit tests (click on the Unit Tests entry): https://regex101.com/r/R0w8Qw/1
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-- Note that it has a couple of changes to make it work on that platform.
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local regex_pattern = {
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[=[/(?=(?!/)(?:(?>[^\\[\/]++|\\.|\[(?:[^\\\]]++|\\.)*+\])*+)++/[gmiyuvsd]*\s*[\n,;\)\]\}\.])()]=],
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"/()[gmiyuvsd]*", "\\"
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}
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-- For the moment let's not actually differentiate the insides of the regex,
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-- as this will need new token types...
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local inner_regex_syntax = {
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patterns = {
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{ pattern = "%(()%?[:!=><]", type = { "string", "string" } },
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{ pattern = "[.?+*%(%)|]", type = "string" },
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{ pattern = "{%d*,?%d*}", type = "string" },
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{ regex = { [=[\[()\^?]=], [=[(?:\]|(?=\n))()]=], "\\" },
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type = { "string", "string" },
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syntax = { -- Inside character class
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patterns = {
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{ pattern = "\\\\", type = "string" },
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{ pattern = "\\%]", type = "string" },
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{ pattern = "[^%]\n]", type = "string" }
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},
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symbols = {}
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}
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},
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{ regex = "\\/", type = "string" },
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{ regex = "[^/\n]", type = "string" },
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},
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symbols = {}
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}
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syntax.add {
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name = "JavaScript",
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files = { "%.js$", "%.json$", "%.cson$", "%.mjs$", "%.cjs$" },
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comment = "//",
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block_comment = { "/*", "*/" },
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patterns = {
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{ pattern = "//.*", type = "comment" },
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{ pattern = { "/%*", "%*/" }, type = "comment" },
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{ regex = regex_pattern, syntax = inner_regex_syntax, type = {"string", "string"} },
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{ pattern = { '"', '"', '\\' }, type = "string" },
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{ pattern = { "'", "'", '\\' }, type = "string" },
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{ pattern = { "`", "`", '\\' }, type = "string" },
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{ pattern = "-?0[xXbBoO][%da-fA-F_]+n?()%s*()/?", type = {"number", "normal", "operator"} },
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{ pattern = "-?%d+[%d%.eE_n]*()%s*()/?", type = {"number", "normal", "operator"} },
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{ pattern = "-?%.?%d+()%s*()/?", type = {"number", "normal", "operator"} },
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{ pattern = "[%+%-=/%*%^%%<>!~|&]", type = "operator" },
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{ pattern = "[%a_][%w_]*%f[(]", type = "function" },
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{ pattern = "[%a_][%w_]*()%s*()/?", type = {"symbol", "normal", "operator"} },
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},
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symbols = {
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["async"] = "keyword",
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["await"] = "keyword",
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["break"] = "keyword",
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["case"] = "keyword",
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["catch"] = "keyword",
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["class"] = "keyword",
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["const"] = "keyword",
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["continue"] = "keyword",
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["debugger"] = "keyword",
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["default"] = "keyword",
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["delete"] = "keyword",
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["do"] = "keyword",
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["else"] = "keyword",
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["export"] = "keyword",
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["extends"] = "keyword",
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["finally"] = "keyword",
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["for"] = "keyword",
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["function"] = "keyword",
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["get"] = "keyword",
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["if"] = "keyword",
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["import"] = "keyword",
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["in"] = "keyword",
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["of"] = "keyword",
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["instanceof"] = "keyword",
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["let"] = "keyword",
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["new"] = "keyword",
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["return"] = "keyword",
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["set"] = "keyword",
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["static"] = "keyword",
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["super"] = "keyword",
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["switch"] = "keyword",
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["throw"] = "keyword",
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["try"] = "keyword",
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["typeof"] = "keyword",
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["var"] = "keyword",
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["void"] = "keyword",
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["while"] = "keyword",
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["with"] = "keyword",
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["yield"] = "keyword",
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["true"] = "literal",
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["false"] = "literal",
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["null"] = "literal",
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["undefined"] = "literal",
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["arguments"] = "keyword2",
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["Infinity"] = "keyword2",
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["NaN"] = "keyword2",
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["this"] = "keyword2",
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},
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}
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