Merge pull request #535 from dlang-community/single-indent

Add single_indent option

README.md

@@ -116,6 +116,7 @@ dfmt_template_constraint_style | **`conditional_newline_indent`** `conditional_n
 dfmt_single_template_constraint_indent | `true`, **`false`** | Set if the constraints are indented by a single tab instead of two. Has only an effect if the style set to `always_newline_indent` or `conditional_newline_indent`.
 dfmt_space_before_aa_colon | `true`, **`false`** | Adds a space after an associative array key before the `:` like in older dfmt versions.
 dfmt_keep_line_breaks | `true`, **`false`** | Keep existing line breaks if these don't violate other formatting rules.
+dfmt_single_indent | `true`, **`false`** | Set if the code in parens is indented by a single tab instead of two.
 
 ## Terminology
 * Braces - `{` and `}`

src/dfmt/config.d

@@ -61,6 +61,8 @@ struct Config
     OptionalBoolean dfmt_space_before_aa_colon;
     ///
     OptionalBoolean dfmt_keep_line_breaks;
+    ///
+    OptionalBoolean dfmt_single_indent;
 
     mixin StandardEditorConfigFields;
 
@@ -90,6 +92,7 @@ struct Config
         dfmt_single_template_constraint_indent = OptionalBoolean.f;
         dfmt_space_before_aa_colon = OptionalBoolean.f;
         dfmt_keep_line_breaks = OptionalBoolean.f;
+        dfmt_single_indent = OptionalBoolean.f;
     }
 
     /**

src/dfmt/formatter.d

@@ -111,6 +111,7 @@ struct TokenFormatter(OutputRange)
         this.output = output;
         this.astInformation = astInformation;
         this.config = config;
+        this.indents = IndentStack(config);
 
         {
             auto eol = config.end_of_line;

src/dfmt/indentation.d

@@ -5,6 +5,8 @@
 
 module dfmt.indentation;
 
+import dfmt.config;
+import dfmt.editorconfig;
 import dparse.lexer;
 
 import std.bitmanip : bitfields;
@@ -31,6 +33,14 @@ bool isTempIndent(IdType type) pure nothrow @nogc @safe
  */
 struct IndentStack
 {
+    /// Configuration
+    private const Config* config;
+
+    this(const Config* config)
+    {
+        this.config = config;
+    }
+
     static struct Details
     {
         mixin(bitfields!(
@@ -221,7 +231,7 @@ struct IndentStack
     /**
      * Dumps the current state of the indentation stack to `stderr`. Used for debugging.
      */
-    void dump(size_t pos = size_t.max, string file = __FILE__, uint line = __LINE__)
+    void dump(size_t pos = size_t.max, string file = __FILE__, uint line = __LINE__) const
     {
         import dparse.lexer : str;
         import std.algorithm.iteration : map;
@@ -260,6 +270,12 @@ private:
 
             if (i + 1 < index)
             {
+                if (config.dfmt_single_indent == OptionalBoolean.t && skipDoubleIndent(i, parenCount))
+                {
+                    parenCount = pc;
+                    continue;
+                }
+
                 immutable currentIsNonWrapTemp = !details[i].wrap
                     && details[i].temp && arr[i] != tok!")" && arr[i] != tok!"!";
                 if (arr[i] == tok!"static"
@@ -276,7 +292,7 @@ private:
                     continue;
                 }
             }
-            else if (parenCount == 0 && arr[i] == tok!"(")
+            else if (parenCount == 0 && arr[i] == tok!"(" && config.dfmt_single_indent == OptionalBoolean.f)
                 size++;
 
             if (arr[i] == tok!"!")
@@ -287,6 +303,12 @@ private:
         }
         return size;
     }
+
+    bool skipDoubleIndent(size_t i, int parenCount) const pure nothrow @safe @nogc
+    {
+        return (details[i + 1].wrap && arr[i] == tok!")")
+            || (parenCount == 0 && arr[i + 1] == tok!"," && arr[i] == tok!"(");
+    }
 }
 
 unittest

src/dfmt/main.d

@@ -95,6 +95,9 @@ else
             case "keep_line_breaks":
                 optConfig.dfmt_keep_line_breaks = optVal;
                 break;
+            case "single_indent":
+                optConfig.dfmt_single_indent = optVal;
+                break;
             default:
                 assert(false, "Invalid command-line switch");
             }
@@ -125,7 +128,8 @@ else
                 "space_before_aa_colon", &handleBooleans,
                 "tab_width", &optConfig.tab_width,
                 "template_constraint_style", &optConfig.dfmt_template_constraint_style,
-                "keep_line_breaks", &handleBooleans);
+                "keep_line_breaks", &handleBooleans,
+                "single_indent", &handleBooleans);
             // dfmt on
         }
         catch (GetOptException e)
@@ -329,6 +333,7 @@ Formatting Options:
     --compact_labeled_statements
     --template_constraint_style
     --space_before_aa_colon
+    --single_indent
         `,
             optionsToString!(typeof(Config.dfmt_template_constraint_style)));
 }

tests/allman/keep_single_indent.d.ref

@@ -0,0 +1,49 @@
+unittest
+{
+    {
+        bool anotherTemplatedFunction(One, Two, Three)(One alpha, Two bravo,
+            Three charlie, double delta)
+        {
+            if (isNumeric!One && isNumeric!Two && isNumeric!Three && echo
+                && foxtrot && golf && hotel && india && juliet)
+            {
+            }
+        }
+    }
+}
+
+void f()
+{
+    string a = "foo"
+        ~ "bar" /* bar */
+        ~ "baz";
+}
+
+unittest
+{
+    if (a)
+    {
+        while (sBraceDepth == 0 && indents.topIsTemp()
+            && ((indents.top != tok!"if" && indents.top != tok!"version")
+                || !peekIs(tok!"else")))
+            a();
+    }
+}
+
+unittest
+{
+    callFunc({ int i = 10; return i; });
+    callFunc({
+        int i = 10;
+        foo(alpha, bravo, charlie, delta, echo, foxtrot, golf, echo);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    });
+    callFunc({
+        int i = 10;
+        foo(alpha_longVarName, bravo_longVarName, charlie_longVarName, delta_longVarName,
+            echo_longVarName, foxtrot_longVarName, golf_longVarName, echo_longVarName);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    }, more_stuff);
+}

tests/allman/single_indent.d.ref

@@ -0,0 +1,41 @@
+unittest
+{
+    {
+        bool anotherTemplatedFunction(One, Two, Three)(One alpha, Two bravo,
+            Three charlie, double delta)
+        {
+            if (isNumeric!One && isNumeric!Two && isNumeric!Three && echo
+                && foxtrot && golf && hotel && india && juliet)
+            {
+            }
+        }
+    }
+}
+
+unittest
+{
+    if (a)
+    {
+        while (sBraceDepth == 0 && indents.topIsTemp()
+            && ((indents.top != tok!"if" && indents.top != tok!"version") || !peekIs(tok!"else")))
+            a();
+    }
+}
+
+unittest
+{
+    callFunc({ int i = 10; return i; });
+    callFunc({
+        int i = 10;
+        foo(alpha, bravo, charlie, delta, echo, foxtrot, golf, echo);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    });
+    callFunc({
+        int i = 10;
+        foo(alpha_longVarName, bravo_longVarName, charlie_longVarName, delta_longVarName,
+            echo_longVarName, foxtrot_longVarName, golf_longVarName, echo_longVarName);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    }, more_stuff);
+}

tests/keep_single_indent.args

@@ -0,0 +1,2 @@
+--single_indent true
+--keep_line_breaks true

tests/keep_single_indent.d

@@ -0,0 +1,49 @@
+unittest
+{
+    {
+        bool anotherTemplatedFunction(One, Two, Three)(One alpha, Two bravo,
+                Three charlie, double delta)
+        {
+            if (isNumeric!One && isNumeric!Two && isNumeric!Three && echo
+                    && foxtrot && golf && hotel && india && juliet)
+            {
+            }
+        }
+    }
+}
+
+void f()
+{
+    string a = "foo"
+        ~ "bar" /* bar */
+        ~ "baz";
+}
+
+unittest
+{
+    if (a)
+    {
+        while (sBraceDepth == 0 && indents.topIsTemp()
+                && ((indents.top != tok!"if" && indents.top != tok!"version")
+                    || !peekIs(tok!"else")))
+            a();
+    }
+}
+
+unittest
+{
+    callFunc({ int i = 10; return i; });
+    callFunc({
+        int i = 10;
+        foo(alpha, bravo, charlie, delta, echo, foxtrot, golf, echo);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    });
+    callFunc({
+        int i = 10;
+        foo(alpha_longVarName, bravo_longVarName, charlie_longVarName, delta_longVarName,
+                echo_longVarName, foxtrot_longVarName, golf_longVarName, echo_longVarName);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    }, more_stuff);
+}

tests/otbs/keep_single_indent.d.ref

@@ -0,0 +1,42 @@
+unittest {
+    {
+        bool anotherTemplatedFunction(One, Two, Three)(One alpha, Two bravo,
+            Three charlie, double delta) {
+            if (isNumeric!One && isNumeric!Two && isNumeric!Three && echo
+                && foxtrot && golf && hotel && india && juliet) {
+            }
+        }
+    }
+}
+
+void f() {
+    string a = "foo"
+        ~ "bar" /* bar */
+        ~ "baz";
+}
+
+unittest {
+    if (a) {
+        while (sBraceDepth == 0 && indents.topIsTemp()
+            && ((indents.top != tok!"if" && indents.top != tok!"version")
+                || !peekIs(tok!"else")))
+            a();
+    }
+}
+
+unittest {
+    callFunc({ int i = 10; return i; });
+    callFunc({
+        int i = 10;
+        foo(alpha, bravo, charlie, delta, echo, foxtrot, golf, echo);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    });
+    callFunc({
+        int i = 10;
+        foo(alpha_longVarName, bravo_longVarName, charlie_longVarName, delta_longVarName,
+            echo_longVarName, foxtrot_longVarName, golf_longVarName, echo_longVarName);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    }, more_stuff);
+}

tests/otbs/single_indent.d.ref

@@ -0,0 +1,35 @@
+unittest {
+    {
+        bool anotherTemplatedFunction(One, Two, Three)(One alpha, Two bravo,
+            Three charlie, double delta) {
+            if (isNumeric!One && isNumeric!Two && isNumeric!Three && echo
+                && foxtrot && golf && hotel && india && juliet) {
+            }
+        }
+    }
+}
+
+unittest {
+    if (a) {
+        while (sBraceDepth == 0 && indents.topIsTemp()
+            && ((indents.top != tok!"if" && indents.top != tok!"version") || !peekIs(tok!"else")))
+            a();
+    }
+}
+
+unittest {
+    callFunc({ int i = 10; return i; });
+    callFunc({
+        int i = 10;
+        foo(alpha, bravo, charlie, delta, echo, foxtrot, golf, echo);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    });
+    callFunc({
+        int i = 10;
+        foo(alpha_longVarName, bravo_longVarName, charlie_longVarName, delta_longVarName,
+            echo_longVarName, foxtrot_longVarName, golf_longVarName, echo_longVarName);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    }, more_stuff);
+}

tests/single_indent.args

@@ -0,0 +1 @@
+--single_indent true

tests/single_indent.d

@@ -0,0 +1,42 @@
+unittest
+{
+    {
+        bool anotherTemplatedFunction(One, Two, Three)(One alpha, Two bravo,
+                Three charlie, double delta)
+        {
+            if (isNumeric!One && isNumeric!Two && isNumeric!Three && echo
+                    && foxtrot && golf && hotel && india && juliet)
+            {
+            }
+        }
+    }
+}
+
+unittest
+{
+    if (a)
+    {
+        while (sBraceDepth == 0 && indents.topIsTemp()
+                && ((indents.top != tok!"if" && indents.top != tok!"version")
+                    || !peekIs(tok!"else")))
+            a();
+    }
+}
+
+unittest
+{
+    callFunc({ int i = 10; return i; });
+    callFunc({
+        int i = 10;
+        foo(alpha, bravo, charlie, delta, echo, foxtrot, golf, echo);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    });
+    callFunc({
+        int i = 10;
+        foo(alpha_longVarName, bravo_longVarName, charlie_longVarName, delta_longVarName,
+                echo_longVarName, foxtrot_longVarName, golf_longVarName, echo_longVarName);
+        doStuff(withThings, andOtherStuff);
+        return i;
+    }, more_stuff);
+}