Module cst 

Box language concrete syntax tree (CST).

This module contains two representations of the Box CST.

The type Tree is an explicit representation of a CST. It consists of Rust vectors of function calls (FuncCall). These calls contain Rust vectors of arguments (Arg). Some of these arguments may, in turn, contain nested trees if the argument is a list type.

The explicit representation is easy to use, but is inefficient and makes using the CST a costly abstraction. The alternative representation is an iterator representation, based on two traits TreeIter and ArgsIter. With this representation, instead of materializing the CST at once with a type like a Tree, calling code instead iterates over the tree.

Structs

Arg

An argument to a function.

FuncCall

A function call.

Tree

Explicit representation of a CST.

Enums

ArgsItem

Item returned by ArgsIter.

TreeItem

Item returned by TreeIter.

Value

The value of an argument to a function.

Traits

ArgsIter

Iterator over the arguments of a function.

TreeIter

Iterator representation of a CST.

Functions

parse

Parse Box language source code into a CST.

parse_using_lexer

Parse into a CST using an explicitly provided lexer.

pretty_print

Pretty print a Box CST.