Variables limitation: Variables with variables in their name are not always counted

[Lakitna]

When using or defining a variable, the variable name can contain other variables. The most common use cases are supported but there are a lot of possible complexity which is not supported.

Variables in variable names are only counted when:

• None of the involved variables are limited by limitation 1.
• All nested variables are single-line scalar variables.
  • No lists (e.g. @{example})
  • No dicts (e.g. &{example})
  • No multi-line string definitions
• No extended variable syntax.

Example: ${hello_${place.lower()}} uses extended variable syntax and is therefore ignored. Because of this, the variable ${hello_world} will be falsely flagged as unused.

*** Variables ***
${hello_world}    Hello World!
${place}          WORLD

*** Keywords ***
My Amazing Keyword
    Log    ${hello_${place.lower()}}

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There is currently no plan to remove this limitation. Reason:

Fully supporting all variables within variables requires a full runtime context. The most common cases are already supported. This should be enough. This is primarily a static code analysis tool and should not try to be so complete.

If you disagree with this assessment, leave a comment on this issue.