---
myst:
    substitutions:
        bloc1:
            python: 1-4,11-32,35-77
            cpp: 5-7,10-27,30-73
        bloc2:
            python: 15-25
            cpp: 10-20
        bloc3:
            python: 37-46
            cpp: 32-41
        bloc4:
            python: 67-71
            cpp: 62-66
        bloc5:
            python: 7-
            cpp: 9-
        dedent:
            python: ":dedent:\n"
            cpp: ""
---
(use_cases_macro_relauncher_sequential_constant)=
# Macro "**relauncherCodeFlowrateSequential_ConstantVar.{{extension}}**"

## Objective

The goal of this macro is to show how to set one of the evaluator's input attribute to a constant 
value, with a sequential runner. The `flowrate` code is provided with {{uranie}} and has been also 
used and discussed throughout these macros.

## Macro

{{
    "```{literalinclude} " + parent_dir
    + "/roottest/uranie/doc/relauncher/use_cases/" + language 
    + "/relauncherCodeFlowrateSequential_ConstantVar."
    + extension
    + "\n"
    + ":language: " + language + "\n"
    + ":lines: " + bloc1[language] + "\n"
    + "```"
}}

Here again, a comparison is drawn with the first {{Relaun}} macro (see 
[](#use_cases_macro_relauncher_sequential_macro)) and only the differences are pointed out. The first 
obvious one, in the very first steps in defining the dataserver and the attributes, is that instead 
of reading a database-file, we are generating a {{doe}} with one big specificity: all the input 
attributes are properly defined, but **r**.

{{
    "```{literalinclude} " + parent_dir
    + "/roottest/uranie/doc/relauncher/use_cases/" + language 
    + "/relauncherCodeFlowrateSequential_ConstantVar."
    + extension
    + "\n"
    + ":language: " + language + "\n"
    + ":lines: " + bloc2[language] + "\n"
    + "```"
}}

A simple {{doe}} is generated and all the input attributes are provided to the input file of the 
assessor, event the constant one **r**.

{{
    "```{literalinclude} " + parent_dir
    + "/roottest/uranie/doc/relauncher/use_cases/" + language 
    + "/relauncherCodeFlowrateSequential_ConstantVar."
    + extension
    + "\n"
    + ":language: " + language + "\n"
    + ":lines: " + bloc3[language] + "\n"
    + "```"
}}

The rest is fairly common, up to the `TMaster`-inheriting object specification: the 
`addConstantValue` method is called to specify that **r** is about to be constant for all ongoing 
estimation, and it provides it value. The last argument states that the value under consideration 
should be stored in the ntuple of the dataserver object, as shown in the next section (from the 
`scan` method).

{{
    "```{literalinclude} " + parent_dir
    + "/roottest/uranie/doc/relauncher/use_cases/" + language 
    + "/relauncherCodeFlowrateSequential_ConstantVar."
    + extension
    + "\n"
    + ":language: " + language + "\n"
    + ":lines: " + bloc4[language] + "\n"
    + dedent[language]
    + "```"
}}

```{raw} latex
\begin{landscape}
```

(use_cases_macro_relauncher_sequential_constant_console)=
## Console

{{
    "```{literalinclude} " + parent_dir
    + "/roottest/build/uranie/doc/relauncher/use_cases/" + language 
    + "/relauncherCodeFlowrateSequential_ConstantVar.log"
    + "\n"
    + ":language: none\n"
    + ":lines: " + bloc5[language] + "\n"
    + "```"
}}

```{raw} latex
\end{landscape}
```