Stop creating closure function in global scope by using partials instead

autoload/ale/completion.vim

@@ -424,6 +424,59 @@ function! ale#completion#HandleLSPResponse(conn_id, response) abort
     \)
 endfunction
 
+function! s:OnReady(linter, lsp_details, ...) abort
+    let l:buffer = a:lsp_details.buffer
+    let l:id = a:lsp_details.connection_id
+    let l:root = a:lsp_details.project_root
+
+    " If we have sent a completion request already, don't send another.
+    if b:ale_completion_info.request_id
+        return
+    endif
+
+    let l:Callback = a:linter.lsp is# 'tsserver'
+    \   ? function('ale#completion#HandleTSServerResponse')
+    \   : function('ale#completion#HandleLSPResponse')
+    call ale#lsp#RegisterCallback(l:id, l:Callback)
+
+    if a:linter.lsp is# 'tsserver'
+        let l:message = ale#lsp#tsserver_message#Completions(
+        \   l:buffer,
+        \   b:ale_completion_info.line,
+        \   b:ale_completion_info.column,
+        \   b:ale_completion_info.prefix,
+        \)
+    else
+        " Send a message saying the buffer has changed first, otherwise
+        " completions won't know what text is nearby.
+        call ale#lsp#NotifyForChanges(l:id, l:root, l:buffer)
+
+        " For LSP completions, we need to clamp the column to the length of
+        " the line. python-language-server and perhaps others do not implement
+        " this correctly.
+        let l:message = ale#lsp#message#Completion(
+        \   l:buffer,
+        \   b:ale_completion_info.line,
+        \   min([
+        \       b:ale_completion_info.line_length,
+        \       b:ale_completion_info.column,
+        \   ]),
+        \   ale#completion#GetTriggerCharacter(&filetype, b:ale_completion_info.prefix),
+        \)
+    endif
+
+    let l:request_id = ale#lsp#Send(l:id, l:message, l:root)
+
+    if l:request_id
+        let b:ale_completion_info.conn_id = l:id
+        let b:ale_completion_info.request_id = l:request_id
+
+        if has_key(a:linter, 'completion_filter')
+            let b:ale_completion_info.completion_filter = a:linter.completion_filter
+        endif
+    endif
+endfunction
+
 function! s:GetLSPCompletions(linter) abort
     let l:buffer = bufnr('')
     let l:lsp_details = ale#lsp_linter#StartLSP(l:buffer, a:linter)
@@ -435,56 +488,9 @@ function! s:GetLSPCompletions(linter) abort
     let l:id = l:lsp_details.connection_id
     let l:root = l:lsp_details.project_root
 
-    function! OnReady(...) abort closure
+    let l:OnReady = function('s:OnReady', [a:linter, l:lsp_details])
-        " If we have sent a completion request already, don't send another.
-        if b:ale_completion_info.request_id
-            return
-        endif
 
-        let l:Callback = a:linter.lsp is# 'tsserver'
+    call ale#lsp#WaitForCapability(l:id, l:root, 'completion', l:OnReady)
-        \   ? function('ale#completion#HandleTSServerResponse')
-        \   : function('ale#completion#HandleLSPResponse')
-        call ale#lsp#RegisterCallback(l:id, l:Callback)
-
-        if a:linter.lsp is# 'tsserver'
-            let l:message = ale#lsp#tsserver_message#Completions(
-            \   l:buffer,
-            \   b:ale_completion_info.line,
-            \   b:ale_completion_info.column,
-            \   b:ale_completion_info.prefix,
-            \)
-        else
-            " Send a message saying the buffer has changed first, otherwise
-            " completions won't know what text is nearby.
-            call ale#lsp#NotifyForChanges(l:id, l:root, l:buffer)
-
-            " For LSP completions, we need to clamp the column to the length of
-            " the line. python-language-server and perhaps others do not implement
-            " this correctly.
-            let l:message = ale#lsp#message#Completion(
-            \   l:buffer,
-            \   b:ale_completion_info.line,
-            \   min([
-            \       b:ale_completion_info.line_length,
-            \       b:ale_completion_info.column,
-            \   ]),
-            \   ale#completion#GetTriggerCharacter(&filetype, b:ale_completion_info.prefix),
-            \)
-        endif
-
-        let l:request_id = ale#lsp#Send(l:id, l:message, l:lsp_details.project_root)
-
-        if l:request_id
-            let b:ale_completion_info.conn_id = l:id
-            let b:ale_completion_info.request_id = l:request_id
-
-            if has_key(a:linter, 'completion_filter')
-                let b:ale_completion_info.completion_filter = a:linter.completion_filter
-            endif
-        endif
-    endfunction
-
-    call ale#lsp#WaitForCapability(l:id, l:root, 'completion', function('OnReady'))
 endfunction
 
 function! ale#completion#GetCompletions() abort

autoload/ale/definition.vim

@@ -57,6 +57,40 @@ function! ale#definition#HandleLSPResponse(conn_id, response) abort
     endif
 endfunction
 
+function! s:OnReady(linter, lsp_details, line, column, options, ...) abort
+    let l:buffer = a:lsp_details.buffer
+    let l:id = a:lsp_details.connection_id
+    let l:root = a:lsp_details.project_root
+
+    let l:Callback = a:linter.lsp is# 'tsserver'
+    \   ? function('ale#definition#HandleTSServerResponse')
+    \   : function('ale#definition#HandleLSPResponse')
+    call ale#lsp#RegisterCallback(l:id, l:Callback)
+
+    if a:linter.lsp is# 'tsserver'
+        let l:message = ale#lsp#tsserver_message#Definition(
+        \   l:buffer,
+        \   a:line,
+        \   a:column
+        \)
+    else
+        " Send a message saying the buffer has changed first, or the
+        " definition position probably won't make sense.
+        call ale#lsp#NotifyForChanges(l:id, l:root, l:buffer)
+
+        " For LSP completions, we need to clamp the column to the length of
+        " the line. python-language-server and perhaps others do not implement
+        " this correctly.
+        let l:message = ale#lsp#message#Definition(l:buffer, a:line, a:column)
+    endif
+
+    let l:request_id = ale#lsp#Send(l:id, l:message, l:root)
+
+    let s:go_to_definition_map[l:request_id] = {
+    \   'open_in_tab': get(a:options, 'open_in_tab', 0),
+    \}
+endfunction
+
 function! s:GoToLSPDefinition(linter, options) abort
     let l:buffer = bufnr('')
     let [l:line, l:column] = getcurpos()[1:2]
@@ -73,37 +107,11 @@ function! s:GoToLSPDefinition(linter, options) abort
     let l:id = l:lsp_details.connection_id
     let l:root = l:lsp_details.project_root
 
-    function! OnReady(...) abort closure
+    let l:OnReady = function('s:OnReady', [
-        let l:Callback = a:linter.lsp is# 'tsserver'
+    \   a:linter, l:lsp_details, l:line, l:column, a:options
-        \   ? function('ale#definition#HandleTSServerResponse')
+    \])
-        \   : function('ale#definition#HandleLSPResponse')
-        call ale#lsp#RegisterCallback(l:id, l:Callback)
 
-        if a:linter.lsp is# 'tsserver'
+    call ale#lsp#WaitForCapability(l:id, l:root, 'definition', l:OnReady)
-            let l:message = ale#lsp#tsserver_message#Definition(
-            \   l:buffer,
-            \   l:line,
-            \   l:column
-            \)
-        else
-            " Send a message saying the buffer has changed first, or the
-            " definition position probably won't make sense.
-            call ale#lsp#NotifyForChanges(l:id, l:root, l:buffer)
-
-            " For LSP completions, we need to clamp the column to the length of
-            " the line. python-language-server and perhaps others do not implement
-            " this correctly.
-            let l:message = ale#lsp#message#Definition(l:buffer, l:line, l:column)
-        endif
-
-        let l:request_id = ale#lsp#Send(l:id, l:message, l:lsp_details.project_root)
-
-        let s:go_to_definition_map[l:request_id] = {
-        \   'open_in_tab': get(a:options, 'open_in_tab', 0),
-        \}
-    endfunction
-
-    call ale#lsp#WaitForCapability(l:id, l:root, 'definition', function('OnReady'))
 endfunction
 
 function! ale#definition#GoTo(options) abort

autoload/ale/hover.vim

@@ -92,7 +92,45 @@ function! ale#hover#HandleLSPResponse(conn_id, response) abort
     endif
 endfunction
 
-function! s:ShowDetails(linter, buffer, line, column, opt) abort
+function! s:OnReady(linter, lsp_details, line, column, opt, ...) abort
+    let l:buffer = a:lsp_details.buffer
+    let l:id = a:lsp_details.connection_id
+    let l:root = a:lsp_details.project_root
+
+    let l:Callback = a:linter.lsp is# 'tsserver'
+    \   ? function('ale#hover#HandleTSServerResponse')
+    \   : function('ale#hover#HandleLSPResponse')
+    call ale#lsp#RegisterCallback(l:id, l:Callback)
+
+    if a:linter.lsp is# 'tsserver'
+        let l:column = a:column
+
+        let l:message = ale#lsp#tsserver_message#Quickinfo(
+        \   l:buffer,
+        \   a:line,
+        \   l:column
+        \)
+    else
+        " Send a message saying the buffer has changed first, or the
+        " hover position probably won't make sense.
+        call ale#lsp#NotifyForChanges(l:id, l:root, l:buffer)
+
+        let l:column = min([a:column, len(getbufline(l:buffer, a:line)[0])])
+
+        let l:message = ale#lsp#message#Hover(l:buffer, a:line, l:column)
+    endif
+
+    let l:request_id = ale#lsp#Send(l:id, l:message, l:root)
+
+    let s:hover_map[l:request_id] = {
+    \   'buffer': l:buffer,
+    \   'line': a:line,
+    \   'column': l:column,
+    \   'hover_from_balloonexpr': get(a:opt, 'called_from_balloonexpr', 0),
+    \}
+endfunction
+
+function! s:ShowDetails(linter, buffer, line, column, opt, ...) abort
     let l:lsp_details = ale#lsp_linter#StartLSP(a:buffer, a:linter)
 
     if empty(l:lsp_details)
@@ -101,43 +139,12 @@ function! s:ShowDetails(linter, buffer, line, column, opt) abort
 
     let l:id = l:lsp_details.connection_id
     let l:root = l:lsp_details.project_root
-    let l:language_id = l:lsp_details.language_id
 
-    function! OnReady(...) abort closure
+    let l:OnReady = function('s:OnReady', [
-        let l:Callback = a:linter.lsp is# 'tsserver'
+    \   a:linter, l:lsp_details, a:line, a:column, a:opt
-        \   ? function('ale#hover#HandleTSServerResponse')
+    \])
-        \   : function('ale#hover#HandleLSPResponse')
-        call ale#lsp#RegisterCallback(l:id, l:Callback)
 
-        if a:linter.lsp is# 'tsserver'
+    call ale#lsp#WaitForCapability(l:id, l:root, 'hover', l:OnReady)
-            let l:column = a:column
-
-            let l:message = ale#lsp#tsserver_message#Quickinfo(
-            \   a:buffer,
-            \   a:line,
-            \   l:column
-            \)
-        else
-            " Send a message saying the buffer has changed first, or the
-            " hover position probably won't make sense.
-            call ale#lsp#NotifyForChanges(l:id, l:root, a:buffer)
-
-            let l:column = min([a:column, len(getbufline(a:buffer, a:line)[0])])
-
-            let l:message = ale#lsp#message#Hover(a:buffer, a:line, l:column)
-        endif
-
-        let l:request_id = ale#lsp#Send(l:id, l:message, l:lsp_details.project_root)
-
-        let s:hover_map[l:request_id] = {
-        \   'buffer': a:buffer,
-        \   'line': a:line,
-        \   'column': l:column,
-        \   'hover_from_balloonexpr': get(a:opt, 'called_from_balloonexpr', 0),
-        \}
-    endfunction
-
-    call ale#lsp#WaitForCapability(l:id, l:root, 'hover', function('OnReady'))
 endfunction
 
 " Obtain Hover information for the specified position

autoload/ale/references.vim

@@ -64,6 +64,36 @@ function! ale#references#HandleLSPResponse(conn_id, response) abort
     endif
 endfunction
 
+function! s:OnReady(linter, lsp_details, line, column, ...) abort
+    let l:buffer = a:lsp_details.buffer
+    let l:id = a:lsp_details.connection_id
+    let l:root = a:lsp_details.project_root
+
+    let l:Callback = a:linter.lsp is# 'tsserver'
+    \   ? function('ale#references#HandleTSServerResponse')
+    \   : function('ale#references#HandleLSPResponse')
+
+    call ale#lsp#RegisterCallback(l:id, l:Callback)
+
+    if a:linter.lsp is# 'tsserver'
+        let l:message = ale#lsp#tsserver_message#References(
+        \   l:buffer,
+        \   a:line,
+        \   a:column
+        \)
+    else
+        " Send a message saying the buffer has changed first, or the
+        " references position probably won't make sense.
+        call ale#lsp#NotifyForChanges(l:id, l:root, l:buffer)
+
+        let l:message = ale#lsp#message#References(l:buffer, a:line, a:column)
+    endif
+
+    let l:request_id = ale#lsp#Send(l:id, l:message, a:lsp_details.project_root)
+
+    let s:references_map[l:request_id] = {}
+endfunction
+
 function! s:FindReferences(linter) abort
     let l:buffer = bufnr('')
     let [l:line, l:column] = getcurpos()[1:2]
@@ -81,33 +111,11 @@ function! s:FindReferences(linter) abort
     let l:id = l:lsp_details.connection_id
     let l:root = l:lsp_details.project_root
 
-    function! OnReady(...) abort closure
+    let l:OnReady = function('s:OnReady', [
-        let l:Callback = a:linter.lsp is# 'tsserver'
+    \   a:linter, l:lsp_details, l:line, l:column
-        \   ? function('ale#references#HandleTSServerResponse')
+    \])
-        \   : function('ale#references#HandleLSPResponse')
 
-        call ale#lsp#RegisterCallback(l:id, l:Callback)
+    call ale#lsp#WaitForCapability(l:id, l:root, 'references', l:OnReady)
-
-        if a:linter.lsp is# 'tsserver'
-            let l:message = ale#lsp#tsserver_message#References(
-            \   l:buffer,
-            \   l:line,
-            \   l:column
-            \)
-        else
-            " Send a message saying the buffer has changed first, or the
-            " references position probably won't make sense.
-            call ale#lsp#NotifyForChanges(l:id, l:root, l:buffer)
-
-            let l:message = ale#lsp#message#References(l:buffer, l:line, l:column)
-        endif
-
-        let l:request_id = ale#lsp#Send(l:id, l:message, l:lsp_details.project_root)
-
-        let s:references_map[l:request_id] = {}
-    endfunction
-
-    call ale#lsp#WaitForCapability(l:id, l:root, 'references', function('OnReady'))
 endfunction
 
 function! ale#references#Find() abort