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-- show unused zig variables as "DiagnosticUnnecessary" instead of error
local orig_underline_show = vim.diagnostic.handlers.underline.show
local custom_ns = vim.api.nvim_create_namespace('custom_unused_ns')
vim.diagnostic.handlers.underline.show = function(namespace, bufnr, diagnostics, opts)
local normal_diags = {}
local custom_diags = {}
for _, diag in ipairs(diagnostics) do
if diag.message:find('unused', 1, true) then
table.insert(custom_diags, diag)
else
table.insert(normal_diags, diag)
end
end
if #normal_diags > 0 and orig_underline_show ~= nil then
orig_underline_show(namespace, bufnr, normal_diags, opts)
end
for _, diag in ipairs(custom_diags) do
vim.highlight.range(
bufnr,
custom_ns,
'DiagnosticUnnecessary',
{ diag.lnum, diag.col },
{ diag.end_lnum, diag.end_col },
{ inclusive = false }
)
end
end
local orig_underline_hide = vim.diagnostic.handlers.underline.hide
vim.diagnostic.handlers.underline.hide = function(namespace, bufnr)
if orig_underline_hide ~= nil then
orig_underline_hide(namespace, bufnr)
end
vim.api.nvim_buf_clear_namespace(bufnr, custom_ns, 0, -1)
end
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