Improve indent for match statement

Author: hattya

indent/python.vim

@@ -1,7 +1,7 @@
 " Vim indent file
 " Language:    Python
 " Author:      Akinori Hattori <hattya@gmail.com>
-" Last Change: 2023-07-09
+" Last Change: 2023-07-13
 " License:     MIT License
 
 if exists('b:did_indent')
@@ -31,6 +31,7 @@ let s:compound_stmts = {
 \  '\v^\s*<else>':    '\v^\s*<%(if|elif|while|for|try|except)>',
 \  '\v^\s*<except>':  '\v^\s*<%(try|except)>',
 \  '\v^\s*<finally>': '\v^\s*<%(try|except|else)>',
+\  '\v^\s*<case>':    '\v^\s*<case>',
 \}
 let s:dedent = '\v^\s*<%(pass|return|raise|break|continue)>'
 let s:ellipsis = '\v^\s*\.{3}\.@!'
@@ -176,11 +177,11 @@ function! s:synmatch(lnum, col, pat) abort
 endfunction
 
 function! s:is_compound_stmt(str, ...) abort
-  return (a:0 && a:1 && a:str =~# '\v^\s*<%(def|class)>') || a:str =~# '\v^\s*<%(if|elif|while|for|except|with)>'
+  return (a:0 && a:1 && a:str =~# '\v^\s*<%(def|class)>') || a:str =~# '\v^\s*<%(if|elif|while|for|except|with|match|case)>'
 endfunction
 
 function! s:matchkw(str) abort
-  return matchstr(a:str, '\v^\s*\zs<%(assert|del|return|yield%(\s+from)=|raise|import|from|global|nonlocal|if|elif|while|for|except|with|def|class)>')
+  return matchstr(a:str, '\v^\s*\zs<%(assert|del|return|yield%(\s+from)=|raise|import|from|global|nonlocal|if|elif|while|for|except|with|match|case|def|class)>')
 endfunction
 
 function! s:cont() abort

test/indent.vimspec

@@ -871,6 +871,70 @@ Describe filetype indent
       End
     End
 
+    Describe match statement
+      It aligns with left brackets
+        let in  = "match expr:\<CR>"
+        let in .= "case (spam,\<CR>eggs):"
+        let out = [
+        \  'match expr:',
+        \  '    case (spam,',
+        \  '          eggs):',
+        \]
+        Assert Equals(Insert(in), Buffer(out))
+      End
+
+      It increases the indent level by 2
+        let b:python_indent_multiline_statement = 1
+        let in  = "match expr:\<CR>"
+        let in .= "case (spam,\<CR>eggs):"
+        let out = [
+        \  'match expr:',
+        \  '    case (spam,',
+        \  '              eggs):',
+        \]
+        Assert Equals(Insert(in), Buffer(out))
+      End
+
+      It increases the indent level (hanging indent)
+        let in  = "match expr:\<CR>"
+        let in .= "case (\<CR>spam,\<CR>eggs,\<CR>):"
+        let out = [
+        \  'match expr:',
+        \  '    case (',
+        \  '        spam,',
+        \  '        eggs,',
+        \  '    ):',
+        \]
+        Assert Equals(Insert(in), Buffer(out))
+      End
+
+      It increases the indent level by 2 (hanging indent)
+        let b:python_indent_multiline_statement = 1
+        let in  = "match expr:\<CR>"
+        let in .= "case (\<CR>spam,\<CR>eggs,\<CR>):"
+        let out = [
+        \  'match expr:',
+        \  '    case (',
+        \  '            spam,',
+        \  '            eggs,',
+        \  '    ):',
+        \]
+        Assert Equals(Insert(in), Buffer(out))
+      End
+
+      It increases the indent level (line continueation)
+        let in  = "match obj \\\<CR>.meth():\<CR>"
+        let in .= "case spam, \\\<CR>eggs:"
+        let out = [
+        \  'match obj \',
+        \  '      .meth():',
+        \  '    case spam, \',
+        \  '         eggs:',
+        \]
+        Assert Equals(Insert(in), Buffer(out))
+      End
+    End
+
     Describe function definition
       It aligns with left brackets
         let in  = "def spam(*args,\<CR>**kwargs):"