How to access a member variable of a record type in a module

[davidkazuhiro]

What is it you are trying to achieve?
My immediate goal is to figure out how to use my "value" record type in my "complex" module.

Ultimately I am trying to write a program which calculates the side lengths and angles of a triangle on the complex plane. If turing has libraries for complex arithmetic which I'm unaware of, please give me a heads up!


What is the problem you are having?
When I try to get x.realPt, I get a "'x' cannot be followed by a '.'" error.


Describe what you have tried to solve this problem
I tried all sorts of minor syntax changes and exporting value.realPt etc. This is my first time using Turing =P


Post any relevant code (You may choose to attach the file instead of posting the code if it is too long)

Turing:

/*  Since I don't think complex exists in turing, we shall a module  for doing complex arithmetic    The following code was taken from  Object Oriented Turing Reference Manual Seventh Edition Version 1.0  by R.C. Holt and Tom West  ISBN 0-921598-35-1  http://compsci.ca/holtsoft/OOTRef.pdf  Chapter 7 : Language Features, p 435  */ module complex     export opaque value, constant, add, subtract, modulus     type value :         record             realPt, imagPt : real         end record     function constant (realPt, imagPt: real ) : value         var answer : value         answer . realPt := realPt         answer . imagPt := imagPt         result answer     end constant     function add (L, R : value ) : value         var answer : value         answer . realPt := L . realPt + R . realPt         answer . imagPt := L . imagPt + R . imagPt         result answer     end add % end of reused code     function subtract ( L, R : value ) : value         var answer : value         answer . realPt := L . realPt - R . realPt         answer . imagPt := L . imagPt - R . imagPt         result answer     end subtract         function modulus ( cnum : value ) : real         var answer : real         answer := sqrt( cnum . realPt ** 2 + cnum . imagPt ** 2 )         result answer     end modulus end complex put "This program takes 3 complex numbers and calculates the angles and ",     "side lengths of the triangle they constitute on the complex plane\n"     % Get complex numbers from user var x : complex.value := complex.constant( 1.0, 1.0 ) put x.realPt

Please specify what version of Turing you are using
4.1.1a

[DemonWasp]

I can't explain why, but removing the "opaque" from your export line resolves the issue. I blame Turing's probably-buggy implementation, because as near as I can tell, your code should work fine as-is.

[davidkazuhiro]

weird... you're right. thanks!