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<H1> 12.5.2 Formal Scalar Types</H1>
<DIV Class="Paranum"><FONT SIZE=-2>1</FONT></DIV>
<DIV Class="Normal"> A <I>formal scalar type</I> is one defined by
any of the <FONT FACE="Arial, Helvetica">formal_type_definition</FONT>s
in this subclause. [The class determined for a formal scalar type is
discrete, signed integer, modular, floating point, ordinary fixed point,
or decimal.] </DIV>
<H4 ALIGN=CENTER>Syntax</H4>
<DIV Class="Paranum"><FONT SIZE=-2>2</FONT></DIV>
<DIV Class="SyntaxIndented"><FONT FACE="Arial, Helvetica">formal_discrete_type_definition<A NAME="I4286"></A>
::= </FONT>(<>)</DIV>
<DIV Class="Paranum"><FONT SIZE=-2>3</FONT></DIV>
<DIV Class="SyntaxIndented"><FONT FACE="Arial, Helvetica">formal_signed_integer_type_definition<A NAME="I4287"></A>
::= </FONT><B>range</B> <></DIV>
<DIV Class="Paranum"><FONT SIZE=-2>4</FONT></DIV>
<DIV Class="SyntaxIndented"><FONT FACE="Arial, Helvetica">formal_modular_type_definition<A NAME="I4288"></A>
::= </FONT><B>mod</B> <></DIV>
<DIV Class="Paranum"><FONT SIZE=-2>5</FONT></DIV>
<DIV Class="SyntaxIndented"><FONT FACE="Arial, Helvetica">formal_floating_point_definition<A NAME="I4289"></A>
::= </FONT><B>digits</B> <></DIV>
<DIV Class="Paranum"><FONT SIZE=-2>6</FONT></DIV>
<DIV Class="SyntaxIndented"><FONT FACE="Arial, Helvetica">formal_ordinary_fixed_point_definition<A NAME="I4290"></A>
::= </FONT><B>delta</B> <></DIV>
<DIV Class="Paranum"><FONT SIZE=-2>7</FONT></DIV>
<DIV Class="SyntaxIndented"><FONT FACE="Arial, Helvetica">formal_decimal_fixed_point_definition<A NAME="I4291"></A>
::= </FONT><B>delta</B> <> <B>digits</B> <></DIV>
<H4 ALIGN=CENTER>Legality Rules</H4>
<DIV Class="Paranum"><FONT SIZE=-2>8</FONT></DIV>
<DIV Class="Normal"> The actual type for a formal scalar type shall
not be a nonstandard numeric type. </DIV>
<DIV Class="Paranum"><FONT SIZE=-2>8.a</FONT></DIV>
<DIV Class="Annotations"><FONT SIZE=-1><B>Reason: </B>This restriction
is necessary because nonstandard numeric types have some number of restrictions
on their use, which could cause contract model problems in a generic
body. Note that nonstandard numeric types can be passed to formal derived
and formal private subtypes, assuming they obey all the other rules,
and assuming the implementation allows it (being nonstandard means the
implementation might disallow anything). </FONT></DIV>
<DIV Class="NotesHeader"><FONT SIZE=-1>NOTES</FONT></DIV>
<DIV Class="Paranum"><FONT SIZE=-2>9</FONT></DIV>
<DIV Class="Notes"><FONT SIZE=-1>12 The actual type shall
be in the class of types implied by the syntactic category of the formal
type definition (see <A HREF="AA-12-5.html">12.5</A>, ``<A HREF="AA-12-5.html">Formal
Types</A>''). For example, the actual for a <FONT FACE="Arial, Helvetica">formal_modular_type_definition</FONT>
shall be a modular type. </FONT></DIV>
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