I've just found the answer - it is because the order of files in command line.
Such fsc's call is succeeded:
J:\_Projecting\F#\demo>"E:\Program Files\FSharp-1.9.9.9\\bin\fsc.exe" -o:obj\Debug\demo.exe File2.fs Program.fs
Is it minor "bug", that will be fix in future F# releases ? :)
I was looking for a reference to point you at but I can't seem to find it anywhere--my google fu is failing me. At any rate, this is not a bug; F# code is order dependent. You have to declare symbols before they're used.
See this excellent explanation from one of the architects of F# about why this is a good thing:
I've read his reasoning and while at first it seemed annoying personally I find hidden dependencies even more annoying and hard to resolve so I'm glad they've made this design decision.
Hi Didro,
In your solution explorer are they in proper order, i.e. the referenced file Module1 is above Module2? As compiler takes solution explorer "order" into account, we have the option to move-up and move-down the order of the files by right click.
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Hello,
I have two files
// Program.fs
#light
module MyCompany.MyNamespace.MyModule2
open MyCompany.MyNamespace.MyModule1
let b = 42
//file2.fs
#light
module MyCompany.MyNamespace.MyModule1
let a = 42
when I try to compile that files with fsc, I have:
>"E:\Program Files\FSharp-1.9.9.9\\bin\fsc.exe" -o:obj\Debug\demo.exe Program.fs File2.fs
Microsoft (R) F# 2.0 Compiler build 1.9.9.9
Copyright (c) Microsoft Corporation. All Rights Reserved.
Program.fs(4,6): error FS0039: The namespace or module 'MyCompany' is not defined
What is the cause of that error ?
Thank you