Changes from Version 1 of CompileTimeBuiltInVersionsExample

Author:

jcc7 (IP: 192.149.244.9)

Timestamp:

12/13/06 22:15:38 (17 years ago)

Comment:

added example

CompileTimeBuiltInVersionsExample

@@ +1 @@
+= Compile-Time Built-in Versions =
+
+''Part of'' VersioningCategory
+
+== Description ==
+
+Determine your compile environment at compile time (and even output the results at compile time).
+
+== Related Example ==
+
+BuiltInVersionsExample
+
+== Example ==
+
+{{{
+#!d
+version(DigitalMars) pragma(msg, "Compiler Vendor: Digital Mars");
+version(linux) pragma(msg, "Operating System: Linux.");
+version(Windows) pragma(msg, "Operating System: Microsoft Windows");
+version(Win32) pragma(msg, "Microsoft Windows (32-bit)");
+version(Win64) pragma(msg, "Microsoft Windows (64-bit)");
+
+version(Windows)
+{
+    version(Win32) {}
+    else version(Win64) {}
+    else pragma(msg, "Microsoft Windows (?-bit)");
+}
+
+version(linux) {}
+else version(Windows) {}
+else pragma(msg, "Operating System: Unknown");
+
+version(X86) pragma(msg, "Processor: Intel or AMD 32-bit");     
+version(AMD64) pragma(msg, "Processor: AMD 64-bit processor");     
+
+version(LittleEndian)   pragma(msg, "byte order: least significant first");
+version(BigEndian)      pragma(msg, "byte order: most significant first");
+
+version(LittleEndian) {}
+else version(BigEndian) {}
+else pragma(msg, "byte order: unknown");
+
+version(D_InlineAsm)    pragma(msg, "Inline assembler: implemented\n");
+
+version(none)           pragma(msg, "This code is always disabled.\n");    
+
+
+import std.stdio : writefln;
+
+void main()
+{     
+    writefln("Nothing needs to happen during runtime 
+since the real work was done during compilation.");    
+}
+}}}
+
+== Testing ==
+
+Tested with Digital Mars D Compiler v0.177 on Windows 2000.
+
+== Sample Output ==
+
+(The output will depend on the operating system and architecture that the program is run on.)
+
+{{{
+Compiler Vendor: Digital Mars
+Operating System: Microsoft Windows
+Microsoft Windows (32-bit)
+Processor: Intel or AMD 32-bit
+byte order: least significant first
+Inline assembler: implemented
+}}}