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A.8 Expressions</div>
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主题 </div></td><td class="Element204" valign="top" width="50%">
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描述 </div></td></tr><tr>
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<a href="00680.html" target="topic">A.8.1 Concatenations</a> </div></td><td class="Element206" valign="top" width="50%">
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concatenation ::=<br>{ expression { , expression } }<br>| { struct_member_label : expression { , struct_member_label : expression } }<br>| { array_member_label : expression { , array_member_label : expression } }<br>constant_concatenation ::=<br>{ constant_expression { , constant_expression } }<br>| { struct_member_label : constant_expression { , struct_member_label : constant_expression } }<br>| { array_member_label : constant_expression { , array_member_label : constant_expression } }<br>struct_member_label ::=<br>default<br>| type_identifier<br>| variable_identifier<br>array_member_label ::=<br>default<br>| type_identifier<br>| constant_expression<br>constant_multiple_concatenation ::= { constant_expression constant_concatenation }<br>module_path_concatenation ::= { module_path_expression { , module_path_expression } }<br>module_path_multiple_concatenation ::= { constant_expression module_path_concatenation... <a href="00680.html" target="topic">more</a> </div></td></tr><tr>
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<a href="00681.html" target="topic">A.8.2 Subroutine calls</a> </div></td><td class="Element206" valign="top" width="50%">
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constant_function_call ::= function_subroutine_call25<br>tf_call ::= ps_or_hierarchical_tf_identifier { attribute_instance } [ ( list_of_arguments ) ]<br>system_tf_call ::= system_tf_identifier [ ( list_of_arguments ) ]<br>subroutine_call ::=<br>tf_call<br>| system_tf_call<br>| method_call<br>| randomize_call<br>function_subroutine_call ::= subroutine_call<br>list_of_arguments ::=<br>[ expression ] { , [ expression ] } { , . identifier ( [ expression ] ) }<br>| . identifier ( [ expression ] ) { , . identifier ( [ expression ] ) }<br>method_call ::= method_call_root . method_call_body<br>method_call_body ::=<br>method_identifier { attribute_instance } [ ( list_of_arguments ) ]<br>| built_in_method_call<br>built_in_method_call ::=<br>array_manipulation_call<br>| randomize_call<br>array_manipulation_call ::=<br>array_method_name {... <a href="00681.html" target="topic">more</a> </div></td></tr><tr>
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<a href="00682.html" target="topic">A.8.3 Expressions</a> </div></td><td class="Element206" valign="top" width="50%">
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inc_or_dec_expression ::=<br>inc_or_dec_operator { attribute_instance } variable_lvalue<br>| variable_lvalue { attribute_instance } inc_or_dec_operator<br>conditional_expression ::= cond_predicate ? { attribute_instance } expression : expression<br>constant_expression ::=<br>constant_primary<br>| unary_operator { attribute_instance } constant_primary<br>| constant_expression binary_operator { attribute_instance } constant_expression<br>| constant_expression ? { attribute_instance } constant_expression : constant_expression<br>constant_mintypmax_expression ::=<br>constant_expression<br>| constant_expression : constant_expression : constant_expression<br>constant_param_expression ::=<br>constant_mintypmax_expression | data_type | $<br>param_expression ::= mintypmax_expression | data_type<br>constant_range_expression ::=<br>constant_expression<br>| constant_part_select_range<br>constant_part_select_range ::=<br>constant_range<br>| constant_indexed_range<br>constant_range ::= constant_expression : constant_expression<br>constant_indexed_range ::=<br>constant_expression +: constant_expression<br>| constant_expression -: constant_expression<br>expression ::=<br>primary<br>| unary_operator { attribute_instance... <a href="00682.html" target="topic">more</a> </div></td></tr><tr>
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<a href="00683.html" target="topic">A.8.4 Primaries</a> </div></td><td class="Element206" valign="top" width="50%">
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constant_primary ::=<br>primary_literal<br>| ps_parameter_identifier<br>| ps_specparam_identifier<br>| genvar_identifier<br>| [ package_scope | class_scope ] enum_identifier<br>| constant_concatentation<br>| constant_multiple_concatenation<br>| constant_function_call<br>| ( constant_mintypmax_expression )<br>| constant_cast<br>module_path_primary ::=<br>number<br>| identifier<br>| module_path_concatenation<br>| module_path_multiple_concatenation<br>| function_subroutine_call<br>| ( module_path_mintypmax_expression )<br>primary ::=<br>primary_literal<br>| [ implicit_class_handle . | class_scope | package_scope ] hierarchical_identifier select<br>| empty_queue<br>| concatenation<br>| multiple_concatenation<br>| function_subroutine_call<br>| ( mintypmax_expression )<br>| cast<br>| streaming_expression<br>| sequence_method_call<br>| $23<br>| null<br>time_literal5 ::=<br>unsigned_number time_unit<br>| fixed_point_number time_unit<br>time_unit ::= s | ms | us | ns | ps | fs |... <a href="00683.html" target="topic">more</a> </div></td></tr><tr>
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<a href="00684.html" target="topic">A.8.5 Expression left-side values</a> </div></td><td class="Element206" valign="top" width="50%">
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net_lvalue ::=<br>ps_or_hierarchical_net_identifier constant_select<br>| { net_lvalue { , net_lvalue } }<br>variable_lvalue ::=<br>[ implicit_class_handle . | package_scope ] hierarchical_variable_identifier select<br>| { variable_lvalue { , variable_lvalue } } </div></td></tr><tr>
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<a href="00685.html" target="topic">A.8.6 Operators</a> </div></td><td class="Element206" valign="top" width="50%">
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unary_operator ::=<br>+ | - | ! | ~ | & | ~& | | | ~| | ^ | ~^ | ^~<br>binary_operator ::=<br>+ | - | * | / | % | == | != | === | !== | =?= | !?= | && | || | **<br>| < | <= | > | >= | & | | | ^ | ^~ | ~^ | >> | << | >>> | <<<<br>inc_or_dec_operator ::= ++ | --<br>unary_module_path_operator ::=<br>! | ~ | & | ~& | | | ~| | ^ | ~^... <a href="00685.html" target="topic">more</a> </div></td></tr><tr>
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<a href="00686.html" target="topic">A.8.7 Numbers</a> </div></td><td class="Element206" valign="top" width="50%">
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number ::=<br>integral_number<br>| real_number<br>integral_number ::=<br>decimal_number<br>| octal_number<br>| binary_number<br>| hex_number<br>decimal_number ::=<br>unsigned_number<br>| [ size ] decimal_base unsigned_number<br>| [ size ] decimal_base x_digit { _ }<br>| [ size ] decimal_base z_digit { _ }<br>binary_number ::= [ size ] binary_base binary_value<br>octal_number ::= [ size ] octal_base octal_value<br>hex_number ::= [ size ] hex_base hex_value<br>sign ::= + | -<br>size ::= non_zero_unsigned_number<br>non_zero_unsigned_number1 ::= non_zero_decimal_digit { _ | decimal_digit}<br>real_number1 ::=<br>fixed_point_number<br>| unsigned_number [ . unsigned_number ] exp [ sign ] unsigned_number<br>fixed_point_number1 ::= unsigned_number . unsigned_number<br>exp ::= e |... <a href="00686.html" target="topic">more</a> </div></td></tr><tr>
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<a href="00687.html" target="topic">A.8.8 Strings</a> </div></td><td class="Element206" valign="top" width="50%">
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string_literal ::= " { Any_ASCII_Characters } </div></td></tr></table></div></div>
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