NB: the “overwrite” option only works for the same type of “learnt_in” value,
i.e. an integer-valued “learnt_in” cannot replace a date-valued “learnt_in” and
vice versa.

Dates handling inside Dynare statements was done in the Flex scanner using a
hack that would introduce some extra characters in the character stream (in
order to return a call to the “dates('…')” constructor to Bison). But this
would break the column location counter, because the latter would count
characters that do not exist in the user file.

This commit fixes it by implementing a more natural handling of dates, adding
the “dates('…')” constructor directly at the level of the semantic value.

– Harmonize location output for warnings so that it is the same as for
  errors (i.e. more explicit about what is the line number and the column number)
– Remove obsolete stuff for delayed error messages that should have been
  removed in db1f6c29.
– Factorize some printing logic with ParsingDriver::undeclared_model_variable_error().
– Simplify WarningConsolidation class

Also do some coding style manual enforcement.

– New “heterogeneity_dimension” statement
– New option “heterogeneity” to “var”, “varexo”, “parameters”, “model” and
  “shocks” statements
– New “SUM()” operator in “model” block

The vector of lower and upper bounds is now provided by
{static,dynamic}_complementarity_conditions.m (which accepts parameters as an
argument, in preparation for the possibility of having parameters in
complementarity conditions).

The index that denotes the reordering of equation residuals (so that the
residual of an equation appears at the index of the endogenous appearing in the
complementarity condition) is now in “M_.{static,dynamic}_mcp_equations_reordering”.

Constraints declared through the ramsey_constraints block are also incorporated
in this new interface (and therefore “M_.ramsey_model_constraints” has been
removed).

The symbol can be either input:
– as ⟂ in UTF-8 (codepoint U+27C2)
– or as _|_ in ASCII

The old syntax using the “mcp” tag is now obsolete, but kept for backward
compatibility.

Closes: #124

The old name is still accepted, but will trigger a deprecation warning.

Automatically detected using clang-tidy with bugprone-reserved-identifier
check.

By the way, homogeneize the define identifiers in relation to camel case
convention.

Automatically detected using clang-tidy with modernize-use-nodiscard check.

NB: does not (yet) works with Occbin regime-specific equations.

Ref. dynare#1890

Incidentally, makes tag names case-insensitive in “model_replace” and
“model_remove”, which is consistent with tag declarations.

Currently defaults to 0.

For consistency with other such classes, since it represents the homotopy_setup
block.

By the way:
– improve the semantics by having a consistent treatment of empty substring
  components (previously, only the last one was ignored)
– move it to DataTree to make it more accessible from elsewhere (even though
  ideally it should be in a “utilities” namespace).

If block decomposition fails, error out if “block” option was passed, but not
otherwise.

This commit does not modify the generated files.

This is a preliminary step for dynare#1859.

The vectors were previously stored as strings internally, which would not
necessarily contain the commas which are required in JSON (but not in
MATLAB/Octave). The fix consists in internally storing those options as
std::vector.

Closes: #96

We follow the advice given by Josuttis in his book about move semantics.

Deleting those member fuctions can be a bug if we want to allow copy semantics,
because overload resolution will no longer fallback to the copy
constructor/assignment operator when given an rvalue.

In particular, this explain why it was not possible to delete the move
assignment operator of the StaticModel class.

Incidentally, in the JSON output, no longer assign a value to the “periods”
field if not passed by the user (previously the value -1 was output in the JSON
file).

Incidentally, forbid exogenous deterministic variables in “endval” blocks.

– heteroskedastic_shocks block
– generate_irfs command
– new estimation syntax

For use with perfect_foresight_with_expectation_errors_setup.

When an endogenous is declared with “var(log)”, say “y”:
– creates an auxiliary named “LOG_y”
– replaces “y(±l)” everywhere by “exp(LOG_y(±l))”
– adds a new auxiliary equation “y=exp(LOG_y)”
– adds a new definition “LOG_y=log(y)” in set_auxiliary_variables.m and
  dynamic_set_auxiliary_series.m files

This option also works in conjunction with “deflator=…”, such as “var(log,
deflator=…)” (the “log” must appear befor “deflator”). There are no provisions
for combining “log” with “log_deflator”, because that would not make much sense
from an economic point of view (amounts to taking the log two times).

Ref. dynare#349