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13.12.1 Language-Defined Restrictions

Static Semantics

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The following restriction_identifiers are language-defined (additional restrictions are defined in the Specialized Needs Annexes):
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No_Implementation_Attributes

There are no implementation-defined attributes. This restriction applies only to the current compilation or environment, not the entire partition.
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No_Implementation_Pragmas

There are no implementation-defined pragmas or pragma arguments. This restriction applies only to the current compilation or environment, not the entire partition.
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No_Obsolescent_Features

There is no use of language features defined in Annex J. It is implementation-defined if uses of the renamings of J.1 are detected by this restriction. This restriction applies only to the current compilation or environment, not the entire partition. 
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The following restriction_parameter_identifier is language defined:
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No_Dependence 

Specifies a library unit on which there are no semantic dependences.

Legality Rules

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The restriction_parameter_argument of a No_Dependence restriction shall be a name; the name shall have the form of a full expanded name of a library unit, but need not denote a unit present in the environment.

Post-Compilation Rules

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No compilation unit included in the partition shall depend semantically on the library unit identified by the name.

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