This crate provides json5 deserialization for luajit.
Inspired and adapted from json5-rs
NOTE: When compiling for macos, please add this to your $CARGO_HOME/config
per this article
(which also inspired this project):
[target.x86_64-apple-darwin]
rustflags = [
"-C", "link-arg=-undefined",
"-C", "link-arg=dynamic_lookup",
]
[target.aarch64-apple-darwin]
rustflags = [
"-C", "link-arg=-undefined",
"-C", "link-arg=dynamic_lookup",
]Also, if you haven't already, add ';?.dylib' to your package.cpath so it will
be recognized by the interpreter.
You can simply require the module in your scripts and parse a string using the
parse method:
local parse = require'json5'.parse
local data = [[
{
/* This is a comment */
ecma_identifier: 'works like a charm',
"string keys": [1,2,3], // trailing comma
}
]]
local parsed_data = parse(data)You must have cargo installed and in your $PATH
Using packer.nvim:
use {
'Joakker/lua-json5',
run = './install.sh'
}Tested on neovim using the following script:
local data = [[ {"hello":"world"} ]]
local json5 = require('json5').parse
local json_decode = vim.fn.json_decode
local time_json5, time_json_decode = 0, 0
local aux
for _ = 1, 1000 do
aux = os.clock()
json5(data)
time_json5 = time_json5 + (os.clock() - aux)
end
for _ = 1, 1000 do
aux = os.clock()
json_decode(data)
time_json_decode = time_json_decode + (os.clock() - aux)
end
print(('json5: %.3fms'):format(time_json5))
print(('json_decode: %.3fms'):format(time_json_decode))On average:
json5: 0.023ms
json_decode: 0.010ms
If performance is your concern, I think you're better off using the builtin
function json_decode. The advantage this package has over regular json,
however, is that you get json5 features, such as comments, trailing commas and
more flexible string literals.
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