https://github.com/d6y/s2s

Convert Spreadsheets to Scala Source
https://github.com/d6y/s2s

Last synced: about 1 month ago
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Convert Spreadsheets to Scala Source

• Host: GitHub
• URL: https://github.com/d6y/s2s
• Owner: d6y
• License: apache-2.0
• Created: 2015-06-19T14:48:24.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2015-06-19T16:21:13.000Z (over 9 years ago)
• Last Synced: 2023-03-10T19:08:48.613Z (almost 2 years ago)
• Language: Scala
• Size: 262 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Spreadsheet to Scala

## Outline

Read a spreadsheet, and for some specified set of cells...

- convert cell formulas to functions.

- convert cells without formulas to constants.

- convert the current value of a formula in the spreadsheet to a unit test.

### Example

Given a spreadsheet like this:

```

  +----- A ----

1 |          11

2 |          13

3 | =SUM(A1,A2)

```

...it should be converted to something along the lines of this:

```

lazy val cellA1 = 11

lazy val cellA2 = 13

def cellA3(x: Int, y: Int) = x + y

asssert( cellA3(cellA1,cellA2) === 24 )

```

## Approach

 - Parse a formula into a tree

 - Chase references and include them

 - Generate code

## Challenges

- Excel formula syntax not uniform

- Functions take values, arrays, ranges...

- Differences between Scala and Excel formula behaviour

- Cyclic references˜

- Infering/converting types

- References across worksheets

- How does Excel treat dates and timezones?

- What are array formula?

- The cached value for a formula could be stale.

- Spreadsheets other than Excel

- ...

We'll do some simple things, and see what cases present themselves.

# Current Status

Does almost nothing:

```

$ sbt run

[info] Running s2s.Main

FormulaCell(SUM(A1,A2),NumericCell(24.0))

Parsing SUM(A1,A2) ...

Success(Func(SUM,CellRef(A1),CellRef(A2)))

```