VirtualMachine Class Reference

Description:

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This class 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 37 of file virtualmachine.hpp.

#include <virtualmachine.hpp>

Inner Type Index:
class	Command

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

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

Type Definition Details:

PC

using PC = integer

Type definition for a program counter.

Definition at line 41 of file virtualmachine.hpp.

Method Details:

DbgList()

AString DbgList ( Program & program )

static

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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 520 of file virtualmachine.cpp.

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Decompile()

AST * Decompile ( Program & program, MonoAllocator & allocator )

static

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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 decompilation.

Definition at line 354 of file virtualmachine.cpp.

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Run()

Box Run ( Program & program, Scope & scope )

static

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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 57 of file virtualmachine.cpp.

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run()

void 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 79 of file virtualmachine.cpp.

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

• virtualmachine.hpp
• virtualmachine.cpp