add minimal readme

If I have an object of type T and want to set it as the default
value for a call to .keyAs(), I have to convert it to a string first.
This string would then get converted again in case the key doesn't exist
in the section.

README

@@ -0,0 +1,4 @@
+This is initial, an INI parsing library for the D programming language.
+
+Reference documentation can be found in the source code as Ddoc comments.
+A quick start guide can be found at <https://reformers.dev/initial>.

README.md

@@ -1,76 +0,0 @@
-## initial - INI parser for the D programming language
-
-My attempt at making a sane and high-quality INI parsing library for D.
-
-```ini
-[section]
-key = value
-```
-
-The contents of an INI file is stored in an `INIUnit` structure. This
-contains an associative array of `INISection`s that you can read or set
-yourself.
-
-initial also provides serialisation facilities that can turn `INIUnit`s
-and `INISection`s back into an INI document. Handy for if your program
-has some sort of GUI configuration interface or if you're passing around
-INI through a network connection.
-
-## Demo
-
-```d
-INIUnit ini;
-
-/* write INI data to an INIUnit */
-ini["section"]["key"] = "value";
-ini["section"]["num"] = "4.8";
-
-/* read INI data */
-readINI(ini, `
-    [section]
-    num = 5.3
-`);
-
-assert(ini["section"]["key"] == "value");
-assert(ini["section"]["num"] == "5.3");
-
-/* read INI from file */
-readINIFile(ini, "config.ini");
-
-/* write INI to file */
-import std.file : write;
-write("config.ini", ini.serialise());
-```
-
-## Usage
-
-Copy initial.d to somewhere in your import path, then compile it alongside
-your program and link it in. Or you can do it all at once by using -i.
-
-    dmd program.d initial.d
-    dmd -i program.d
-
-Documentation can be found by reading the documentation comments in the code.
-
-## Progress
-
-### Finished
-
-- Keys
-- Sections
-- Default section
-- Comments
-
-### Unimplemented
-
-- Key referencing
-
-Currently initial.d does all I need it to, and I consider it complete.
-However if you have any questions, feel free to send an email to [my
-public inbox][1] or directly to my address (jeremy@baxters.nz). Patches
-are also welcome which you can generate with `git format-patch` and attach
-to an email or just copy into the body of an email ([`git send-email`][2]
-can do this automatically).
-
-[1]: https://lists.sr.ht/~jeremy/public-inbox
-[2]: https://git-send-email.io

dub.json

@@ -1,9 +1,9 @@
 {
 	"name": "initial",
-	"description": "INI parsing library for the D programming language",
+	"description": "INI parser",
 
-	"authors": ["Jeremy Baxter"],
-	"copyright": "Copyright © 2024, Jeremy Baxter",
+	"authors": ["Jeremy Baxter <jeremy@baxters.nz>"],
+	"copyright": "Copyright © 2024 Jeremy Baxter",
 	"license": "BSL-1.0",
 
 	"targetType": "library",

initial.d

@@ -3,27 +3,29 @@
  *
  * Boost Software License - Version 1.0 - August 17th, 2003
  *
- * Permission is hereby granted, free of charge, to any person or organization
- * obtaining a copy of the software and accompanying documentation covered by
- * this license (the "Software") to use, reproduce, display, distribute,
- * execute, and transmit the Software, and to prepare derivative works of the
- * Software, and to permit third-parties to whom the Software is furnished to
- * do so, all subject to the following:
+ * Permission is hereby granted, free of charge, to any person or
+ * organization obtaining a copy of the software and accompanying
+ * documentation covered by this license (the "Software") to use,
+ * reproduce, display, distribute, execute, and transmit the Software,
+ * and to prepare derivative works of the Software, and to permit
+ * third-parties to whom the Software is furnished to do so, all
+ * subject to the following:
  *
- * The copyright notices in the Software and this entire statement, including
- * the above license grant, this restriction and the following disclaimer,
- * must be included in all copies of the Software, in whole or in part, and
- * all derivative works of the Software, unless such copies or derivative
- * works are solely in the form of machine-executable object code generated by
- * a source language processor.
+ * The copyright notices in the Software and this entire statement,
+ * including the above license grant, this restriction and the following
+ * disclaimer, must be included in all copies of the Software, in whole or
+ * in part, and all derivative works of the Software, unless such copies or
+ * derivative works are solely in the form of machine-executable object
+ * code generated by a source language processor.
  *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
- * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
- * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
+ * NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE
+ * DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
  */
 
 /++
@@ -215,10 +217,9 @@ struct INISection
 	this(string name) nothrow
 	{
 		this.name = name;
-		keys = new string[string];
 	}
 
-	/+
+	/++
 	 + Returns the value of `k` in this section or
 	 + `defaultValue` if the key is not present.
 	 +/
@@ -234,10 +235,10 @@ struct INISection
 	 + with a message containing location information.
 	 +/
 	T
-	keyAs(T)(string k, string defaultValue = null)
+	keyAs(T)(string k, T defaultValue)
 	{
 		try
-			return key(k, defaultValue).to!T();
+			return k in keys ? keys[k].to!T() : defaultValue;
 		catch (ConvException)
 			throw new INITypeException(
 				format!"unable to convert [%s].%s to %s"(name, k, T.stringof));