-- mod-version:2 -- lite-xl 2.0
local syntax = require "core.syntax"

syntax.add{
    name = "R",
    files = {"%.r$", "%.rds$", "%.rda$", "%.rdata$", "%.R$"},
    comment = "#",
    patterns = {
        {pattern = {"#", "\n"}, type = "comment"},
        {pattern = {'"', '"'}, type = "string"},
        {pattern = {"'", "'"}, type = "string"},
        {pattern = "[%a_][%w_]*%f[(]", type = "function"},
        {pattern = "[%a_][%w_]*", type = "symbol"},
        {pattern = "[%+%-=/%*%^%%<>!|&]", type = "operator"},
        {pattern = "0x[%da-fA-F]+", type = "number"},
        {pattern = "-?%d+[%d%.eE]*", type = "number"},
        {pattern = "-?%.?%d+", type = "number"},
    
    },
    symbols = {
        ["TRUE"] = "literal",
        ["FALSE"] = "literal",
        ["NA"] = "literal",
        ["NULL"] = "literal",
        ["Inf"] = "literal",
        ["if"] = "keyword",
        ["else"] = "keyword",
        ["while"] = "keyword",
        ["function"] = "keyword",
        ["break"] = "keyword",
        ["next"] = "keyword",
        ["repeat"] = "keyword",
        ["in"] = "keyword",
        ["for"] = "keyword",
        ["NA_integer"] = "keyword",
        ["NA_complex"] = "keyword",
        ["NA_character"] = "keyword",
        ["NA_real"] = "keyword"
    }
}