Results for: "Logger"

DesugarCompiler is a compiler that desugars Ruby code into a more primitive form. This is useful for consumers that want to deal with fewer node types.

Here we are going to patch StringQuery to put in the class-level methods so that it can maintain a consistent interface

Query methods that allow categorizing strings based on their context for where they could be valid in a Ruby syntax tree.

This represents a location in the source.

This represents an error that was encountered during parsing.

This is a result specific to the ‘parse` and `parse_file` methods.

A pattern is an object that wraps a Ruby pattern matching expression. The expression would normally be passed to an ‘in` clause within a `case` expression or a rightward assignment expression. For example, in the following snippet:

case node
in ConstantPathNode[ConstantReadNode[name: :Prism], ConstantReadNode[name: :Pattern]]
end

the pattern is the ConstantPathNode[...] expression.

The pattern gets compiled into an object that responds to call by running the compile method. This method itself will run back through Prism to parse the expression into a tree, then walk the tree to generate the necessary callable objects. For example, if you wanted to compile the expression above into a callable, you would:

callable = Prism::Pattern.new("ConstantPathNode[ConstantReadNode[name: :Prism], ConstantReadNode[name: :Pattern]]").compile
callable.call(node)

The callable object returned by compile is guaranteed to respond to call with a single argument, which is the node to match against. It also is guaranteed to respond to ===, which means it itself can be used in a ‘case` expression, as in:

case node
when callable
end

If the query given to the initializer cannot be compiled into a valid matcher (either because of a syntax error or because it is using syntax we do not yet support) then a Prism::Pattern::CompilationError will be raised.

Indicates a failure to resolve a name or address.

Installs a gem along with all its dependencies from local and remote gems.

Raised when trying to activate a gem, and that gem does not exist on the system. Instead of rescuing from this class, make sure to rescue from the superclass Gem::LoadError to catch all types of load errors.

Raised when there are conflicting gem specs loaded