knit_script.knit_script_interpreter.statements.With_Statement module

With statement for setting variables in temporary variable space.

This module provides the With_Statement class, which implements temporary variable scoping in knit script programs. It allows variables to be temporarily assigned new values within a specific scope, then automatically restored when the scope exits.

class With_Statement(parser_node, statement, assignments)[source]

Bases: Statement

Statement that sets variables for a sub-statement block.

Creates a temporary scope where specified variables are assigned new values, executes a statement within that scope, then restores the previous values. Special handling is provided for machine variables like rack and carrier to ensure proper machine state management.

This statement is useful for temporarily changing machine configuration or variable values for specific operations without permanently affecting the outer scope.: It provides a clean way to make scoped changes that are automatically reverted.

_statement

The statement to execute within the temporary variable scope.

Type:: Statement

_assignments

List of variable assignments to make in the temporary scope.

Type:: list[Assignment]

Parameters:

parser_node (LRStackNode)
statement (Statement)
assignments (list[Assignment])

__init__(parser_node, statement, assignments)[source]

Initialize a with statement.

Parameters:

parser_node (LRStackNode) – The parser node from the abstract syntax tree.
statement (Statement) – The statement to execute within the temporary variable scope.
assignments (list[Assignment]) – List of variable assignments to make in the temporary scope before executing the statement.

execute(context)[source]

Execute the statement within a temporary variable scope.

Creates a new scope, applies all assignments, executes the statement, then restores machine variables to their previous states. Machine variables are handled specially to ensure proper state restoration and consistency.

Parameters:: context (Knit_Script_Context) – The current execution context of the knit script interpreter.
Return type:: None

__str__()[source]

Return string representation of the with statement.

Returns:: A string showing the assignments and statement.
Return type:: str

__repr__()[source]

Return detailed string representation of the with statement.

Returns:: Same as __str__ for this class.
Return type:: str

property line_number: int

Get the line number of the symbol that generated this statement.

Returns:: The line number where this element appears in the source file.
Return type:: int

property location: Location

Get the location of this symbol in KnitScript file.

Returns:: The location of this symbol in the source file, including file name, line number, and position information.
Return type:: Location