4. Definitions

王朝other·作者佚名  2006-01-10
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For the purposes of this International Standard, the following definitions

apply. Other terms are defined

where they appear in italic type or on the left side of a syntax rule.

Terms explicitly defined in this

International Standard are not to be presumed to refer implicitly to

similar terms defined elsewhere. Terms

not defined in this International Standard are to be interpreted according

to ISO/IEC 2382.1. Mathematical

symbols not defined in this International Standard are to be interpreted

according to ISO 31.11.

Application . refers to an assembly that has an entry point (§10.1). When

an application is run, a new

application domain is created. Several different instantiations of an

application may exist on the same

machine at the same time, and each has its own application domain.

Application domain . an entity that enables application isolation by acting

as a container for application

state. An application domain acts as a container and boundary for the types

defined in the application and the

class libraries it uses. Types loaded into one application domain are

distinct from the same type loaded into

another application domain, and instances of objects are not directly

shared between application domains.

For instance, each application domain has its own copy of static variables

for these types, and a static

constructor for a type is run at most once per application domain.

Implementations are free to provide

implementation-specific policy or mechanisms for the creation and

destruction of application domains.

Argument . an expression in the comma-separated list bounded by the

parentheses in a method or instance

constructor call expression. It is also known as an actual argument.

Assembly . refers to one or more files that are output by the compiler as a

result of program compilation.

An assembly is a configured set of loadable code modules and other

resources that together implement a unit

of functionality. An assembly may contain types, the executable code used

to implement these types, and

references to other assemblies. The physical representation of an assembly

is not defined by this

specification. Essentially, an assembly is the output of the compiler.

Behavior . external appearance or action.

Behavior, implementation-defined . unspecified behavior where each

implementation documents how

the choice is made.

Behavior, undefined . behavior, upon use of a nonportable or erroneous

construct or of erroneous data,

for which this International Standard imposes no requirements. [Possible

handling of undefined behavior

ranges from ignoring the situation completely with unpredictable results,

to behaving during translation or

execution in a documented manner characteristic of the environment (with or

without the issuance of a

diagnostic message), to terminating a translation or execution (with the

issuance of a diagnostic message)].

Behavior, unspecified . behavior where this International Standard provides

two or more possibilities and

imposes no further requirements on which is chosen in any instance.

Class library . refers to an assembly that can be used by other assemblies.

Use of a class library does not

cause the creation of a new application domain. Instead, a class library is

loaded into the application domain

that uses it. For instance, when an application uses a class library, that

class library is loaded into the

application domain for that application. If an application uses a class

library A that itself uses a class

library B, then both A and B are loaded into the application domain for the

application.

Diagnostic message . a message belonging to an implementation-defined

subset of the implementation.s

output messages.

Error, compile-time . an error reported during program translation.

Exception . an error condition that is outside the ordinary expected

behavior.

 
 
 
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