alib::expressions::detail::VirtualMachine Struct Reference

Description:

This type implements a very simple stack machine that understands just four commands (!) plus a fifth to execute sub-programs.

This class is part of module ALib Expressions. It is not too well documented as it resides in a detail namespace and is not to be used from the outside expression API.

Definition at line 18 of file virtualmachine.hpp.

#include <virtualmachine.hpp>

Inheritance diagram for alib::expressions::detail::VirtualMachine:

Collaboration diagram for alib::expressions::detail::VirtualMachine:

Inner Type Index:
class	Command
	A command of the VM. More...

Public Type Index:
using	PC = integer
	Type definition for a program counter.

Public Static Method Index:
static AString	DbgList (Program &program)
static AST *	Decompile (Program &program, MonoAllocator &allocator)
static alib::Box	Run (Program &program, Scope &scope)
static void	run (Program &program, Scope &scope)

Additional Inherited Members
Protected Static Method Index: inherited from alib::expressions::detail::VirtualMachineBase
static Scope *	getExpressionCTScope (ExpressionVal &ev)

Type Definition Details:

PC

using alib::expressions::detail::VirtualMachine::PC = integer

Type definition for a program counter.

Definition at line 20 of file virtualmachine.hpp.

Method Details:

DbgList()

AString alib::expressions::detail::VirtualMachine::DbgList ( Program & program )

static

Lists a virtual machine program.

Note: This method is available only with debug-builds of the library.

Parameters

program

The program to list.

Returns

The program listing.

Definition at line 470 of file virtualmachine.cpp.

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Decompile()

AST * alib::expressions::detail::VirtualMachine::Decompile ( Program & program, MonoAllocator & allocator )

static

Static method that decompiles a program into an abstract syntax tree. Used to generate optimized, normalized, parsable expression strings.

Parameters

program	The program to decompile.
allocator	Allocator for AST objects (and their data).

Returns

The abstract syntax tree as a result of de-compilation.

Definition at line 311 of file virtualmachine.cpp.

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Run()

Box alib::expressions::detail::VirtualMachine::Run ( Program & program, Scope & scope )

static

Static method that runs an expression program.

Parameters

program	The program to run.
scope	The scope to use.

Returns

The result value of the expression program.

Definition at line 23 of file virtualmachine.cpp.

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run()

void alib::expressions::detail::VirtualMachine::run ( Program & program, Scope & scope )

static

The implementation of Run, which itself is just initialization code.

Parameters

program	The program to run.
scope	The scope to use.

Definition at line 43 of file virtualmachine.cpp.

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The documentation for this struct was generated from the following files:

• virtualmachine.hpp
• virtualmachine.cpp