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feat(treesitter): show which nodes are missing in InspectTree

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Now `:InspectTree` will show missing nodes as e.g. `(MISSING identifier)`
or `(MISSING ";")` rather than just `(identifier)` or `";"`. This is
doable because the `MISSING` keyword is now valid query syntax.

Co-authored-by: Christian Clason <c.clason@uni-graz.at>
This commit is contained in:
Riley Bruins 2025-02-04 09:25:03 -08:00 committed by Christian Clason
parent d769c340b9
commit 09f9f0a946
3 changed files with 64 additions and 1 deletions
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1
runtime/doc/news.txt
View File

@ -381,6 +381,7 @@ TREESITTER
queries in addition to overriding.
• |LanguageTree:is_valid()| now accepts a range parameter to narrow the scope
of the validity check.
• |:InspectTree| now shows which nodes are missing.
TUI

5
runtime/lua/vim/treesitter/dev.lua
View File

@ -224,9 +224,12 @@ function TSTreeView:draw(bufnr)
local text ---@type string
if item.node:named() then
text = string.format('(%s', item.node:type())
text = string.format('(%s%s', item.node:missing() and 'MISSING ' or '', item.node:type())
else
text = string.format('%q', item.node:type()):gsub('\n', 'n')
if item.node:missing() then
text = string.format('(MISSING %s)', text)
end
end
if item.field then
text = string.format('%s: %s', item.field, text)

59
test/functional/treesitter/inspect_tree_spec.lua
View File

@ -178,4 +178,63 @@ describe('vim.treesitter.inspect_tree', function()
-- close source buffer window and all remaining tree windows
n.expect_exit(n.command, 'quit')
end)
it('shows which nodes are missing', function()
insert([[
int main() {
if (a.) {
// ^ MISSING field_identifier here
if (1) d()
// ^ MISSING ";" here
}
}
]])
exec_lua(function()
vim.treesitter.start(0, 'c')
vim.treesitter.inspect_tree()
end)
feed('a')
expect_tree [[
(translation_unit ; [0, 0] - [8, 0]
(function_definition ; [0, 0] - [6, 1]
type: (primitive_type) ; [0, 0] - [0, 3]
declarator: (function_declarator ; [0, 4] - [0, 10]
declarator: (identifier) ; [0, 4] - [0, 8]
parameters: (parameter_list ; [0, 8] - [0, 10]
"(" ; [0, 8] - [0, 9]
")")) ; [0, 9] - [0, 10]
body: (compound_statement ; [0, 11] - [6, 1]
"{" ; [0, 11] - [0, 12]
(if_statement ; [1, 4] - [5, 5]
"if" ; [1, 4] - [1, 6]
condition: (parenthesized_expression ; [1, 7] - [1, 11]
"(" ; [1, 7] - [1, 8]
(field_expression ; [1, 8] - [1, 10]
argument: (identifier) ; [1, 8] - [1, 9]
operator: "." ; [1, 9] - [1, 10]
field: (MISSING field_identifier)) ; [1, 10] - [1, 10]
")") ; [1, 10] - [1, 11]
consequence: (compound_statement ; [1, 12] - [5, 5]
"{" ; [1, 12] - [1, 13]
(comment) ; [2, 4] - [2, 41]
(if_statement ; [3, 8] - [4, 36]
"if" ; [3, 8] - [3, 10]
condition: (parenthesized_expression ; [3, 11] - [3, 14]
"(" ; [3, 11] - [3, 12]
(number_literal) ; [3, 12] - [3, 13]
")") ; [3, 13] - [3, 14]
consequence: (expression_statement ; [3, 15] - [4, 36]
(call_expression ; [3, 15] - [3, 18]
function: (identifier) ; [3, 15] - [3, 16]
arguments: (argument_list ; [3, 16] - [3, 18]
"(" ; [3, 16] - [3, 17]
")")) ; [3, 17] - [3, 18]
(comment) ; [4, 8] - [4, 36]
(MISSING ";"))) ; [4, 36] - [4, 36]
"}")) ; [5, 4] - [5, 5]
"}"))) ; [6, 0] - [6, 1]
]]
end)
end)