football

Example 2: Football

Pseudo AST

Generated from original.py using pseudo-python

That's a simple command line program that

• accepts a filename and a team name specified by command args

• shows a "usage" message if not enough command args are supplied

• reads the file specified by the filename

• parses the football results in it

• calculates the points that the team has accumulated based on its results

It demonstrates

• native standard library use: Pseudo uses the target language standard library string/list methods/functions

• idiomatic code translation: e.g. in the C# version Pseudo analyzes the use of a tuple and generates and uses a class with suitable field names instead

• I/O handling: Pseudo uses the target language standard library to do file I/O and print data

• index/length of command args based on target language conventions, handy for little command line tools

  • js 2-based command args

    if (process.argv.length < 4) {`

    var results = load_results(process.argv[2]);

  • c# 0-based command args

    if (args.Length < 2)

    var results = LoadResults(args[0]);

  • python 1-based command args

    if len(sys.argv) < 3:

    results = load_results(sys.argv[1])

Commands: (assuming current)

• python

  translate to py with

  # from python source
  > pseudo-python original.py football.py
  #or from ast
  > pseudo football.pseudo.yaml py

  and run with

  > python football.py football.txt Liverpool
  

• javascript

  translate to js with

  # from python source
  > pseudo-python original.py football.js
  #or from ast
  > pseudo football.pseudo.yaml js

  and run with

  > node football.js football.txt Liverpool

• ruby

  translate to ruby with

  # from python source
  > pseudo-python original.py football.rb
  #or from ast
  > pseudo football.pseudo.yaml rb football.txt Liverpool

  and run with

  > ruby football.rb

• c#

  translate to c# with

  # from python source
  > pseudo-python original.py football.cs
  #or from ast
  > pseudo football.pseudo.yaml csharp

  and run with

  > mcs football.cs # or an equivalent command compiling cs files
  > ./football.exe football.txt Liverpool

• go

  translate to go with

  # from python source
  > pseudo-python original.py football.go
  #or from ast
  > pseudo football.pseudo.yaml go

  and run

  > go run football.go football.txt Liverpool