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name: testing/examples/ob-C-test.org 	 # note: path name is non-authoritative(*)

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#+Title: a collection of examples for ob-C tests
#+OPTIONS: ^:nil
* Simple tests
  :PROPERTIES:
  :ID:       fa6db330-e960-4ea2-ac67-94bb845b8577
  :END:
#+source: simple
#+begin_src cpp :includes "<iostream>" :results silent
  std::cout << 42;
  return 0;
#+end_src

#+source: simple
#+begin_src cpp :includes <iostream> :results silent
  std::cout << 42;
  return 0;
#+end_src

#+source: simple
#+begin_src D :results silent
  writefln ("%s", 42);
#+end_src

#+source: integer_var
#+begin_src cpp :var q=12 :includes "<iostream>" :results silent
  std::cout << q;
  return 0;
#+end_src

#+source: integer_var
#+begin_src D :var q=12 :results silent
  writefln ("%s", q);
#+end_src

#+source: two_var
#+begin_src cpp :var q=12 :var p=10 :includes "<iostream>" :results silent
  std::cout << p+q;
  return 0;
#+end_src

#+source: two_var
#+begin_src D :var q=12 :var p=10 :results silent
  writefln ("%s", p+q);
#+end_src

#+source: string_var
#+begin_src cpp :var q="word" :includes '(<iostream> <cstring>) :results silent
  std::cout << q << ' ' << std::strlen(q);
  return 0;
#+end_src

#+source: string_var
#+begin_src D :var q="word" :results silent
  writefln ("%s %s", q, q.length);
#+end_src

#+source: define
#+begin_src cpp :defines N 42  :includes "<iostream>" :results silent
  std::cout << N;
  return 0;
#+end_src

* Array
  :PROPERTIES:
  :ID:       2df1ab83-3fa3-462a-a1f3-3aef6044a874
  :END:
#+source: array
#+begin_src cpp :includes "<iostream>" :results vector :results silent
  for (int i=1; i<3; i++) {
    std::cout << i << '\n';
  }
  return 0;
#+end_src

#+source: array
#+begin_src D :results vector :results silent
  foreach (i; 1..3)
    writefln ("%s", i);
#+end_src

* Matrix
  :PROPERTIES:
  :ID:       cc65d6b3-8e8e-4f9c-94cd-f5a00cdeceb5
  :END:
#+name: C-matrix
| 1 | 2 |
| 3 | 4 |

#+source: list_var
#+begin_src cpp :var a='("abc" "def") :includes "<iostream>" :results silent
  std::cout << a[0] << a[1] << sizeof(a)/sizeof(*a) << '\n';
#+end_src

#+source: list_var
#+begin_src D :var a='("abc" "def") :results silent
  writefln ("%s%s%s", a[0], a[1], a.length);
#+end_src

#+source: vector_var
#+begin_src cpp :var a='[1 2] :includes "<iostream>" :results silent
  std::cout << a[0] << a[1] << sizeof(a)/sizeof(*a) << '\n';
#+end_src

#+source: vector_var
#+begin_src D :var a='[1 2] :results silent
  writefln ("%s%s%s", a[0], a[1], a.length);
#+end_src

#+source: list_list_var
#+begin_src cpp :var q=C-matrix :includes "<iostream>" :results silent
  std::cout << q[0][0] << ' ' << q[1][0] << '\n'
            << q[0][1] << ' ' << q[1][1] << '\n'; // transpose
#+end_src

#+source: list_list_var
#+begin_src D :var q=C-matrix :results silent
  writefln ("%s %s", q[0][0], q[1][0]);
  writefln ("%s %s", q[0][1], q[1][1]); // transpose
#+end_src

* Inhomogeneous table
  :PROPERTIES:
  :ID:       e112bc2e-419a-4890-99c2-7ac4779531cc
  :END:

#+name: tinomogen
  | day       | quty |
  |-----------+------|
  | monday    |   34 |
  | tuesday   |   41 |
  | wednesday |   56 |
  | thursday  |   17 |
  | friday    |   12 |
  | saturday  |    7 |
  | sunday    |    4 |

#+source: inhomogeneous_table
#+begin_src cpp :var tinomogen=tinomogen :results silent :includes <string.h> <stdio.h>
int main()
{
  int i, j;
  for (i=0; i<tinomogen_rows; i++) {
    for (j=0; j<tinomogen_cols; j++)
      printf ("%s ", tinomogen[i][j]);
    printf ("\n");
  }
  printf ("Friday %s\n", tinomogen_h(4,"day"));
  return 0;
}
#+end_src

#+source: inhomogeneous_table
#+begin_src D :var tinomogen=tinomogen :results silent
import std.stdio;
void main()
{
  for (int i=0; i<tinomogen_rows; i++) {
    for (int j=0; j<tinomogen_cols; j++)
      writef ("%s ", tinomogen[i][j]);
    writeln();
  }
  writefln ("Friday %s", tinomogen_h(4,"day"));
}
#+end_src

* Output
:PROPERTIES:
:ID:       9386490b-4063-4400-842c-4a634edbedf5
:END:

#+source: double_quotes
#+begin_src cpp :includes <iostream> :results output verbatim raw
std::cout << "\"line 1\"\n";
std::cout << "\"line 2\"\n";
std::cout << "\"line 3\"\n";
#+end_src

* File naming
:PROPERTIES:
:ID:       1a691f36-f9c1-4531-8fc0-ee7b21ef5975
:END:

The binary file is saved in =./hello-world=.

#+name: compile-only-1
#+begin_src C++ :includes <iostream> :results none :compile-only yes :file ./hello-world
std::cout << "Hello World!\n";
#+end_src

A link to the binary file is inserted when =:results file= is set.

#+name: compile-only-2
#+begin_src C++ :includes <iostream> :results file :compile-only yes :file ./hello-world
std::cout << "Hello World!\n";
#+end_src

#+RESULTS: compile-only-2
[[file:./hello-world]]

Error! The =:file= header is unset.

#+name: compile-only-3
#+begin_src C++ :includes <iostream> :results none :compile-only yes
std::cout << "Hello World!\n";
#+end_src

Syntax Error! =*Org-Babel Error Output*= buffer is popped open.  The
contents of that buffer are also the results of this block.

#+name: compile-only-4.0
#+begin_src C++ :includes <iostream> :results output :compile-only yes :file ./hello-world
std::cout << "Hello World!\n" <== syntax error
#+end_src

Same, except results are silenced.

#+name: compile-only-4.1
#+begin_src C++ :includes <iostream> :results none :compile-only yes :file ./hello-world
std::cout << "Hello World!\n" <== syntax error
#+end_src

Warnings. 

#+name: compile-only-5
#+begin_src C++ :includes <iostream> :flags -Wall :results output :wrap example :compile-only yes :file ./hello-world
int i{0};
std::cout << "Hello World!\n";
#+end_src






debug log:

solving 2212192fb ...
found 2212192fb in https://yhetil.org/orgmode/87h6kdyh52.fsf_-_@t14.reltub.ca/
found c7a96f665 in https://git.savannah.gnu.org/cgit/emacs/org-mode.git
preparing index
index prepared:
100644 c7a96f665242ba73105433fcadb8a7154aded5a4	testing/examples/ob-C-test.org

applying [1/1] https://yhetil.org/orgmode/87h6kdyh52.fsf_-_@t14.reltub.ca/
diff --git a/testing/examples/ob-C-test.org b/testing/examples/ob-C-test.org\r
index c7a96f665..2212192fb 100644\r

1:54: trailing whitespace.
Warnings. \r
Checking patch testing/examples/ob-C-test.org...
1:61: new blank line at EOF.
+
Applied patch testing/examples/ob-C-test.org cleanly.
warning: 2 lines add whitespace errors.

index at:
100644 3e4e5028c166938a7913a7868b57dfb9a61effb5	testing/examples/ob-C-test.org

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