enhance: enhance fmt tool. (#1850)

* enhance: enhance fmt tool. save empty line between comments, fix logic of empty line between stmt

Signed-off-by: he1pa <[email protected]>

* fix ut

Signed-off-by: he1pa <[email protected]>

---------

Signed-off-by: he1pa <[email protected]>

Author: He1pa

kclvm/ast_pretty/src/lib.rs

@@ -245,6 +245,14 @@ impl<'p> Printer<'p> {
                     match self.comments.pop_front() {
                         Some(comment) => {
                             self.writeln(&comment.node.text);
+                            match self.comments.front() {
+                                Some(next_comment) => {
+                                    if next_comment.line >= comment.line + 2 && count > 0 {
+                                        self.write_newline();
+                                    }
+                                }
+                                None => {}
+                            }
                         }
                         None => break,
                     }

kclvm/ast_pretty/src/node.rs

@@ -39,6 +39,7 @@ impl<'p, 'ctx> MutSelfTypedResultWalker<'ctx> for Printer<'p> {
         if let Some(doc) = &module.doc {
             self.write(&doc.node);
             self.write_newline();
+            self.write_newline();
         }
 
         self.stmts(&module.body);
@@ -993,9 +994,13 @@ impl<'p> Printer<'p> {
             // Do not format out user-reserved blank lines: which does not mean that to preserve all user-written blank lines.
             // For situations where there are more than two blank lines, we only keep one blank line.
             let need_newline = if let Some(prev_stmt) = prev_stmt {
-                stmt.line > 0
-                    && stmt.line >= prev_stmt.end_line + 2
-                    && !self.has_comments_on_node(stmt)
+                if stmt.line > prev_stmt.end_line + 2 {
+                    true
+                } else if stmt.line == prev_stmt.end_line + 2 {
+                    stmt.line > 0 && !self.has_comments_on_node(stmt)
+                } else {
+                    false
+                }
             } else {
                 false
             };

kclvm/ast_pretty/src/test_data/codelayout.output

@@ -1,6 +1,7 @@
 """
 Module documents
 """
+
 import math as alias_math
 
 schema Person(Base):
@@ -111,6 +112,7 @@ joined_data_3 = '''\
 joined_data_4 = '''\
   \${CC}
 '''
+
 # Member access and index assign targets
 a[0].b -= 1
 a.b[0] += 1

kclvm/ast_pretty/src/test_data/comment.input

@@ -77,4 +77,10 @@ data = [ # Comment One
         2  # Comment Five
     # Comment Six
     *[3, 4] # Comment Seven
-]
+]
+
+# This is a comment
+foo = "bar"
+
+# This is another comment
+fizz = "bazz"

kclvm/ast_pretty/src/test_data/comment.output

@@ -34,10 +34,13 @@ appConfiguration = AppConfiguration {
         name: "kusion_override"
     }
     # Comment Seven
+    
     # Comment Eight
     overQuota: True
 }
+
 # Comment Nine
+
 # Deprecated
 @Deprecated()
 schema Foo:
@@ -91,3 +94,9 @@ data = [
     # Comment Seven
     *[3, 4]
 ]
+
+# This is a comment
+foo = "bar"
+
+# This is another comment
+fizz = "bazz"

kclvm/tools/src/format/test_data/format_data/inline_comment.golden

@@ -2,6 +2,7 @@
 # Inline comment 2
 # Inline comment 3
 a = 1
+
 # Inline comment 4
 # Inline comment 5
 # 
@@ -11,6 +12,7 @@ a = 1
 # 
 # Inline comment 8
 b = 2
+
 # Same inline comment
 # Same inline comment
 # Same inline comment