fmt: extract type decls code into functions to cleanup (#9126)

vlib/v/fmt/fmt.v

@@ -476,17 +476,25 @@ fn stmt_is_single_line(stmt ast.Stmt) bool {
 }
 
 pub fn (mut f Fmt) type_decl(node ast.TypeDecl) {
-	mut comments := []ast.Comment{}
 	match node {
-		ast.AliasTypeDecl {
+		ast.AliasTypeDecl { f.alias_type_decl(node) }
+		ast.FnTypeDecl { f.fn_type_decl(node) }
+		ast.SumTypeDecl { f.sum_type_decl(node) }
+	}
+}
+
+pub fn (mut f Fmt) alias_type_decl(node ast.AliasTypeDecl) {
 	if node.is_pub {
 		f.write('pub ')
 	}
 	ptype := f.table.type_to_str(node.parent_type)
 	f.write('type $node.name = $ptype')
-			comments << node.comments
+
-		}
+	f.comments(node.comments, has_nl: false)
-		ast.FnTypeDecl {
+	f.writeln('\n')
+}
+
+pub fn (mut f Fmt) fn_type_decl(node ast.FnTypeDecl) {
 	if node.is_pub {
 		f.write('pub ')
 	}
@@ -529,9 +537,12 @@ pub fn (mut f Fmt) type_decl(node ast.TypeDecl) {
 	} else if fn_info.return_type.has_flag(.optional) {
 		f.write(' ?')
 	}
-			comments << node.comments
+
-		}
+	f.comments(node.comments, has_nl: false)
-		ast.SumTypeDecl {
+	f.writeln('\n')
+}
+
+pub fn (mut f Fmt) sum_type_decl(node ast.SumTypeDecl) {
 	if node.is_pub {
 		f.write('pub ')
 	}
@@ -550,13 +561,8 @@ pub fn (mut f Fmt) type_decl(node ast.TypeDecl) {
 			f.wrap_long_line(3, true)
 		}
 	}
-			comments << node.comments
+
-		}
+	f.comments(node.comments, has_nl: false)
-	}
-	if comments.len > 0 {
-		f.write(' ')
-		f.comments(comments, has_nl: false)
-	}
 	f.writeln('\n')
 }