Format if expressions & loops

src/comment.rs

@@ -17,9 +17,11 @@ pub fn rewrite_comment(orig: &str, block_style: bool, width: usize, offset: usiz
     let s = orig.trim();
 
     // Edge case: block comments. Let's not trim their lines (for now).
-    let opener = if block_style { "/* " } else { "// " };
-    let closer = if block_style { " */" } else { "" };
-    let line_start = if block_style { " * " } else { "// " };
+    let (opener, closer, line_start) = if block_style {
+        ("/* ", " */", " * ")
+    } else {
+        ("// ", "", "// ")
+    };
 
     let max_chars = width.checked_sub(closer.len()).unwrap_or(1)
                          .checked_sub(opener.len()).unwrap_or(1);

src/config.rs

@@ -14,6 +14,18 @@ use {NewlineStyle, BraceStyle, ReturnIndent, StructLitStyle};
 use lists::SeparatorTactic;
 use issues::ReportTactic;
 
+#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+pub enum BlockIndentStyle {
+    // Same level as parent.
+    Inherit,
+    // One level deeper than parent.
+    Tabbed,
+    // Aligned with block open.
+    Visual,
+}
+
+impl_enum_decodable!(BlockIndentStyle, Inherit, Tabbed, Visual);
+
 #[derive(RustcDecodable, Clone)]
 pub struct Config {
     pub max_width: usize,
@@ -31,6 +43,7 @@ pub struct Config {
     pub report_todo: ReportTactic,
     pub report_fixme: ReportTactic,
     pub reorder_imports: bool, // Alphabetically, case sensitive.
+    pub expr_indent_style: BlockIndentStyle,
 }
 
 impl Config {

src/default.toml

@@ -13,3 +13,4 @@ enum_trailing_comma = true
 report_todo = "Always"
 report_fixme = "Never"
 reorder_imports = false
+expr_indent_style = "Tabbed"