Changes from Version 1 of ImportFile

Author:

nascent (IP: 67.110.217.136)

Timestamp:

02/05/10 04:10:36 (14 years ago)

Comment:

Page created

ImportFile

@@ +1 @@
+= Reading Files at Compile Time =
+
+== Description ==
+
+D lets you do a lot code execution during compile time, also known as Compile Time Function Evaluation (CTFE). Sometimes the information you want to work with at compile time is located in a file, you can access the content by using import("filename"); which returns a character array.
+
+== Example ==
+
+File: ctfi.txt
+{{{
+Hello World
+}}}
+
+File: ctfi.d
+{{{
+#!d
+import std.stdio;
+
+void main() {
+        const foo = import("ctfi.txt");
+
+        writefln(foo);
+}
+}}}
+
+If you try to compile this with $ dmd ctfi.d you will receive the error
+
+{{{ctfi.d(6): Error: need -Jpath switch to import text file ctfi.txt}}}
+
+This is the path for file imports that are not libraries. Use the following for compilation:
+
+Compile:
+{{{
+dmd -J. ctfi.d
+}}}