Difference between revisions of "XCSG:Parameter"
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== Specifications == | == Specifications == | ||
| + | |||
| + | {| class="atlaswikitable" style="width:100%" | ||
| + | ! width="160" align="left" | Metaclass | ||
| + | | Parameter | ||
| + | |- | ||
| + | ! Extends | ||
| + | | [[Variable]], [[TemplateParameter]] | ||
| + | |- | ||
| + | ! Description | ||
| + | | An unbound variable used in the specification of an operation, a message, an event, a template, etc. | ||
| + | |- | ||
| + | ! References | ||
| + | | [5, p. 2-14, Figure 2-5], [5, p. 2-51, 2-69], [26, CodeParameterDeclarationExpression] | ||
| + | |} | ||
| + | |||
| + | {| class="atlaswikitable" style="width:100%" | ||
| + | ! width="160"| Attribute | ||
| + | | kind | ||
| + | |- | ||
| + | ! Type | ||
| + | | [[ParameterDirectionKind]] | ||
| + | |- | ||
| + | ! Description | ||
| + | | The kind of parameter (in, out, inout, return) | ||
| + | |} | ||
Revision as of 13:55, 5 March 2014
The semantics of Parameter include those common to UML [5, p. 2-51, 2-69], MS-IL, and the JVM.
The defaultValue of a Parameter must be compatible with its type.
When default parameter values are overridden, the default parameter value associated with a call should always be determined by the run time type of the target object.
Specifications
| Metaclass | Parameter |
|---|---|
| Extends | Variable, TemplateParameter |
| Description | An unbound variable used in the specification of an operation, a message, an event, a template, etc. |
| References | [5, p. 2-14, Figure 2-5], [5, p. 2-51, 2-69], [26, CodeParameterDeclarationExpression] |
| Attribute | kind |
|---|---|
| Type | ParameterDirectionKind |
| Description | The kind of parameter (in, out, inout, return) |
Language Mappings
The kind property is related to the use of keywords such as const (in C++), final (in Java), or in, out and inout (in Ada), which restrict read/write access to individual parameters. C++ does not handle overridden default parameter values correctly, as explained by Scott Meyers [47, Item 38].
