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Analysis

The analyzer strategy is used to perform static analyses such as name and type analysis, on the AST that a parser produces. An analysis context provides a project-wide store to facilitate multi-file analysis and incrementality. There are four ways to configure the analysis, which set the analyzer strategy with the observer and context keys in an ESV file.

language

  context  : $Context
  observer : $Strategy

No Analysis

To completely disable analysis, do not set an observer and set the context to none:

language

  context : none

Stratego

Stratego-based analysis allows you to implement your analysis in Stratego:

language

  context  : legacy
  observer : editor-analyze

The identifier after the colon refers to the Stratego strategy that performs the analysis. It must take as input a 3-tuple (ast, path, projectPath). As output it must produce a 4-tuple (ast, error*, warning*, note*). The following Stratego code is an example of a strategy that implements this signature:

editor-analyze: (ast, path, projectPath) -> (ast', errors, warnings, notes)
  with ast'     := <analyze> ast
     ; errors   := <collect-all(check-error)> ast'
     ; warnings := <collect-all(check-warning)> ast'
     ; notes    := <collect-all(check-note)> ast'

Statix

To use Statix as the meta-language for name and type analysis, use the editor-analyze strategy defined in trans/analysis.str, annotate it with the (constraint) modifier, and set no context:

language

  observer : editor-analyze (constraint)

By default, the Statix analyzer works in single-file mode and does not consider multi-file name resolution. To enable that, add the (multifile) modifier:

language

  observer : editor-analyze (constraint) (multifile)

Last update: 2021-11-15
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