Struct Runtime 

pub struct Runtime { /* private fields */ }

The runtime environment for executing Patchwork code.

Holds variable bindings and execution context like the working directory.

Implementations

impl Runtime

pub fn new(working_dir: PathBuf) -> Self

Create a new runtime with the given working directory.

pub fn with_print_sink(working_dir: PathBuf, print_sink: PrintSink) -> Self

Create a new runtime with a print sink for output redirection.

pub fn set_print_sink(&mut self, sink: PrintSink)

Set the print sink for output redirection.

pub fn print(&self, message: String) -> Result<(), String>

Send a print message to the sink, or stdout if no sink is configured.

Returns Ok(()) on success, or Err if the channel is disconnected.

pub fn working_dir(&self) -> &PathBuf

Get the current working directory.

pub fn set_working_dir(&mut self, dir: PathBuf)

Set the current working directory.

pub fn push_scope(&mut self)

Push a new scope onto the scope stack (entering a block).

pub fn pop_scope(&mut self)

Pop the current scope from the stack (leaving a block).

pub fn define_var(&mut self, name: &str, value: Value) -> Result<(), String>

Define a new variable in the current scope.

Returns an error if the variable already exists in the current scope.

pub fn get_var(&self, name: &str) -> Option<&Value>

Get the value of a variable, searching from innermost to outermost scope.

pub fn set_var(&mut self, name: &str, value: Value) -> Result<(), String>

Set the value of an existing variable.

Searches from innermost to outermost scope for the variable. Returns an error if the variable doesn’t exist.

Trait Implementations

impl Debug for Runtime

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Runtime

fn default() -> Self

Returns the “default value” for a type.