Welcome to gcl’s documentation!

Contents:

• Introduction
  • Vision
  • Why not use JSON?
  • Alternatives
• Language Basics
  • Basic syntax
  • Expressions
  • Calling functions
  • Accessing values in tuples
  • Including other files
  • ‘if’ expressions
  • List comprehensions
  • Tuple composition
  • Parameterized tuples
  • Accessing inherited values
  • Identifiers
• Scoping rules and their consequences
  • Lexical Scope
  • Valueless keys are input parameters
  • The ‘inherit’ keyword
• Using GCL files from Python
  • Bindings variables from the script
  • Finding nodes by location: GPath
  • Finding nodes by criteria: TupleFinder
  • Thread safety
• Command Line Tools
  • gcl-print
  • gcl2json
• Schemas
  • Use cases
  • Specifying a schema
  • Controlling key visibility on exports
• Generating library documentation
  • Prerequisites
  • Writing doc comments
  • Special documentation tags
  • Generating the documentation
• Functions in GCL
  • List of standard functions
  • Custom functions
• Syntax Highlighting
• Why should I care about GCL?
  • A gentle note of warning
  • Whither JSON?
  • Readability/writability
  • GCL Extensions
  • Principle: don’t repeat yourself!
  • Rule: you can always tell where a variable is coming from
  • Influences on script interpreting GCL models
• Expressive Power
  • Tuples are functions
  • A more elaborate example
  • Multi-way relations
  • Inner tuples are closures
  • Let’s do something silly