The changes in 1ec3923a were not working as
intended, because AC_CHECK_PROG expect values and not actions. Hence
AC_MSG_ERROR was not properly executed.

Closes: dynare#825

Closes: #33

bugfix: forecast type option in shock_decomposition.

See merge request Dynare/preprocessor!9

Master

See merge request Dynare/preprocessor!8

This reverts commit 3ae92499, reversing
changes made to 3ec01b86.

This reverts commit a37fea0d, reversing
changes made to 3ae92499.

introduce command line options: `exclude_eqs` and `include_eqs`

See merge request Dynare/preprocessor!7

Allows for the inclusion/exclusion of a set of equations, specified either on the command line or in a text file.

If the equation has a single endogenous variable on the LHS, then the equation is moved. If not, if the equation has an `endogenous` tag then that variable is removed along with this equation. If not, then an error is thrown.

As a command line argument, `exclude_eqs` can take the form (same syntax for `include_eqs`):
* `exclude_eqs=eq1 to remove all equations declared as `[name=eq1]`
* `exclude_eqs=[eq 1, eq 2]` to remove all equations declared as `[name=eq 1]` or `[name=eq 2]`
* `exclude_eqs=[tagname=X]` to remove all equations declared as `[tagname=X]`
* `exclude_eqs=[tagname=(X, Y)]` to remove all equations declared as `[tagname=X]` or `[tagname=Y]`

When declared in a file, the file should be of the form:
```
eq 1
eq 2
```
to remove all equations declared as `[name=eq 1]` or `[name=eq 2]`.

It should be of the form:
```
tagname=
X
Y
```
to remove all equations declared as `[tagname=X]` or `[tagname=Y]`.

A new --disable-doc configure flag has been introduced to skip the compilation
of the documentation.

The incorrect `equal` template was being used.

macro processor: fix typo that caused logical or not to work when one of the arguments is Real == 1 and other arguments are false

previously, `@#define str=""` caused an error

fix missing tokens in the lexer: conditional, unconditional.

See merge request Dynare/preprocessor!6

Add interface for forecast_shock_decomposition.

See merge request Dynare/preprocessor!5

* only support 64 bit mex
* check whether local compiler exists; if not use system compiler; if that doesn't exist stop processing
* move to minimum macOS 10.9, corresponding to the MATLAB mex min

— Raise the default tolerance for cross-derivatives to 1e-6, to reduce the
  number of false positives

— New option “balanced_growth_test_tol” to the “model” block for changing that
  tolerance

— Turn back test failures into errors. Since there is now an option for
  controlling the tolerance, the user always has the possibility of making the
  test pass.

Closes: dynare#1389

fix bug causing auxiliary variables for pac growth parameters not to contain their original symbol id

introduce variableMapping, default equation name tags in M_ and JSON output

See merge request Dynare/preprocessor!3

These functions should have been deleted in
946d105c.

In many cases, they can be replaced by the curly braces syntax.

Otherwise, we can now use the pair() and tuple() constructors, without the need
to specify template parameters, thanks to class template argument
deduction (new in C++17).

This is made possible by the getLagEquivalenceClass() method introduced in the
previous commit.

Previously, the static version of the LHS expressions was used.

As a consequence, drop ModFile::diff_static_model, now useless.

Previously, for testing whether two diff() expressions or two unary ops were
the lead/lag of each other, the preprocessor would test whether they have the
same static representation. This is ok for simple expressions (e.g.
diff(x(-1))), but not for more complex ones (e.g. diff(x-y) and diff(x(-1)-y)
should not be given the same auxiliary variable).

This commit fixes this by properly constructing the equivalence relationship
and choosing a representative within each equivalence class. See the comments
above lag_equivalence_table_t in ExprNode.hh for more details.

Closes #27