14 lines
859 B
Markdown
14 lines
859 B
Markdown
# Global Using Directive
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Syntax for a using directive is extended with an optional `global` keyword that can precede the `using` keyword:
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```antlr
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using_directive
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: 'global'? 'using' ('static' | name_equals)? name ';'
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;
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```
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- Global Using Directives are allowed only on the Compilation Unit level (cannot be used inside a namespace declaration).
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- Global Using directives, if any, must precede any non-global using directives.
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- The scope of a Global Using Directive extends over the namespace member declarations and non-global using directives of all compilation units within the program.
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The scope of a Global Using Directive specifically does not include other Global Using Directives. Thus, peer Global Using Directives or those from a different
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compilation unit do not affect each other, and the order in which they are written is insignificant.
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