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Closes: #89

Creates a VarExpectationModelTable analogous to PacModelTable.

In particular, make it more visible that the substitution also occurs in PAC
equations (and not only in VAR and TCM equations).

In case of nested unary ops (e.g. log(log())), ensure that the definition of the external aux var references the internal aux var

Ref. dynare#1843

Ref. dynare#1837

By default, the preprocessor substitutes logs and diffs by auxiliary variables
only in equations of auxiliary models (VAR, PAC). Hence they are not
substituted in the equation defining the target, since it is outside the
auxiliary model.

The fix consists in doing the substitution in that equation as well, when we
parse the linear combination within that equation.

Ref. dynare#1837

(“endl” is defined in “ostream”)

Otherwise clang emits this warning:
 using directive refers to implicitly-defined namespace 'std'

[skip ci]

Ref. Madysson/estimation-codes#5

Simple variable nodes are already correctly matched by
ExprNode::matchLinearCombinationOfVariables().

Also improve the related documentation.

The existing check (in AbstractEstimatedParamsStatement::commonCheckPass()) was
only working inside a given estimated_params block, but not across blocks.

This option provides the same behaviour as before the change in
60ef6bbd.

It is typically useful when doing several estimations in the same .mod file.

Also use a better name for the type-specific ID variable.

The purpose of this statement is to specify the options that apply to the whole
model, when there are several “model” blocks, so as to restore the symmetry
between those blocks (since otherwise one “model” block would typically bear
the options, while the other ones would typically have no option).

It still remains possible to specify the options on one “model” block, or even
spread accross several ones.

Closes: #19

Factorize the implementation with the existing code for the include_eqs and
exclude_eqs options (which has been refactored by the way).

Ref. #19

In a model with [static]/[dynamic] equations, if the user was using include_eqs
with a list of equations that does *not* contain equations marked
[static]/[dynamic], then the call to ModelTree::includeExcludeEquations(…,
static_equations=true) would have an empty list of equation tags (as stored
in tag_eqns).

The right behaviour in this case is to exclude all static equations. However,
the code would exclude none, and this would disrupt the equilibrium between
[static] and [dynamic] equations (since all [dynamic] equations were excluded
by the other call to the same method).

The fix consists in removing the shortcut that returns from the method if
tag_eqns is empty.

Julia specific interface for normcdf and normpdf

See merge request !56

Everything was already in place (since ages!), except that the parser interface
was missing.

Also fix the derivation formula for atanh, which was incorrect.

Closes: #85

Ref. !55

This file operates on vectors.

Ref. dynare#1826