org.nlogo.compile.api

represents an application, in the abstract (either a reporter application of a command application). This is used when parsing arguments, when we don't care what kind of application the args are for.

An interface representing a node in the NetLogo abstract syntax tree (AKA parse tree, in NetLogo's case).

Each AstNode, even if synthesized, should correspond to some particular source fragment, as indicated by the position and length. It's the compiler's job to make sure these values are always reasonable.

Transforms an AST to allow changes without mutation

an interface for AST tree-walkers. This represents the usual Visitor pattern with double-dispatch.

represents a set of code that should not be evaluated, but can be lexed and tokenized. This is an expression, and can be used as an argument to commands and reports.

represents a block containing zero or more statements. Called a command block rather than a statement block for consistency with usual NetLogo jargon. Note that this is an Expression, and as such can be an argument to commands and reporters, etc.

The default AST tree-walker. This simply visits each node of the tree, and visits any children of each node in turn. Subclasses can implement pre-order or post-order traversal, or a wide range of other strategies.

represents a NetLogo expression. An expression is either a block or a reporter application (variable references and constants (including lists), are turned into reporter applications).

represents a single procedure definition. really just a container for the procedure body, which is a Statements object.

represents a reporter application. This is the typical kind of NetLogo expression, things like "round 5" and "3 + 4". However, this class also represents things like constants, which are converted into no-arg reporter applications as they're parsed.

represents a block containing exactly one expression. Called a reporter block rather than an expression block for consistency with usual NetLogo jargon. Note that this is an Expression, and as such can be an argument to commands and reporters, etc. However, it is a different expression from the expression it contains... Its "blockness" is significant.

represents a NetLogo statement. Statements only have one form: command application.

represents a chunk of zero or more NetLogo statements. Note that this is not necessarily a "block" of statements, as block means something specific (enclosed in [], in particular). This class is used to represent other groups of statements as well, for instance procedure bodies.