📄 1076_axa.html
字号:
</pre>
<pre> subprogram_declaration
| subprogram_body
| type_declaration
| subtype_declaration
| constant_declaration
| variable_declaration
| file_declaration
| alias_declaration
| attribute_declaration
| attribute_specification
| use_clause
| group_template_declaration
| group_declaration
process_declarative_part ::= <b>[§</b>; <b> <a href = "1076_9.HTM#9.2"> 9.2</a>]</b>
{ process_declarative_item }
process_statement ::= <b>[§<a href = "1076_9.HTM#9.2"> 9.2</a>]</b>
[ <i>process</i>_label : ]
[ <b>postponed</b> ] <b>process</b> [ ( sensitivity_list ) ] [ <b>is</b> ]
process_declarative_part
<b>begin</b>
process_statement_part
<b>end</b> [ <b>postponed</b> ]<b> process</b> [ <i>process</i>_label ] ;
process_statement_part ::= <b>[§<a href = "1076_9.HTM#9.2"> 9.2</a>]</b>
{ sequential_statement }
qualified_expression ::= <b>[§<a href = "1076_7.HTM#7.3.4"> 7.3.4</a>]</b>
type_mark ' ( expression )
| type_mark ' aggregate
range ::= <b>[§<a href = "1076_3.HTM#3.1"> 3.1</a>]</b>
<i>range</i>_attribute_name
| simple_expression direction simple_expression
range_constraint ::= <b>range</b> range <b>[§<a href = "1076_3.HTM#3.1"> 3.1</a>]</b>
record_type_definition ::= <b>[§<a href = "1076_3.HTM#3.2.2"> 3.2.2</a>]</b>
<b>record</b>
element_declaration
{ element_declaration }
<b>end</b> <b>record</b> [ <i>record_type</i>_simple_name ]
relation ::= <b>[§<a href = "1076_7.HTM#7.1"> 7.1</a>]</b>
shift_expression [ relational_operator shift_expression ]
relational_operator ::= = | /= | < | <= | > | >= <b>[§<a href = "1076_7.HTM#7.2"> 7.2</a>]</b>
report_statement ::= <b>[§<a href = "1076_8.HTM#8.3"> 8.3</a>]</b>
[ label : ]
<b>report</b> expression
[ <b>severity</b> expression ] ;
return_statement ::= <b>[§<a href = "1076_8.HTM#8.12"> 8.12</a>]</b>
[ label : ] <b>return</b> [ expression ] ;
scalar_type_definition ::= <b>[§<a href = "1076_3.HTM#3.1"> 3.1</a>]</b>
enumeration_type_definition | integer_type_definition
| floating_type_definition | physical_type_definition
secondary_unit ::= <b>[§<a href = "1076_11.HTM#11.1"> 11.1</a>]</b>
architecture_body
| package_body
secondary_unit_declaration ::= identifier = physical_literal ; <b>[§<a href = "1076_3.HTM#3.1.3"> 3.1.3</a>]</b>
selected_name ::= prefix . suffix <b>[§<a href = "1076_6.HTM#6.3"> 6.3</a>]</b>
selected_signal_assignment ::= <b>[§<a href = "1076_9.HTM#9.5.2"> 9.5.2</a>]</b>
</pre>
<pre> <b>with</b> expression <b>select</b>
target <= options selected_waveforms ;
selected_waveforms ::= <b>[§<a href = "1076_9.HTM#9.5.2"> 9.5.2</a>]</b>
{ waveform <b>when</b> choices , }
waveform <b>when</b> choices
sensitivity_clause ::= <b>on</b> sensitivity_list <b>[§<a href = "1076_8.HTM#8.1"> 8.1</a>]</b>
sensitivity_list ::= <i>signal</i>_name { , <i>signal</i>_name } <b> [§<a href = "1076_8.HTM#8.1"> 8.1</a>]</b>
sequence_of_statements ::= <b>[§ 8]</b>
{ sequential_statement }
sequential_statement ::= <b>[§ 8]</b>
wait_statement
| assertion_statement
| report_statement
| signal_assignment_statement
| variable_assignment_statement
| procedure_call_statement
| if_statement
| case_statement
| loop_statement
| next_statement
| exit_statement
| return_statement
| null_statement
shift_expression ::= <b>[§<a href = "1076_7.HTM#7.1"> 7.1</a>]</b>
simple_expression [ shift_operator simple_expression ]
shift_operator ::= <b>sll</b> | <b>srl</b> | <b>sla</b> | <b>sra</b> | <b>rol</b> | <b>ror</b> <b>[§<a href = "1076_7.HTM#7.2"> 7.2</a>]</b>
sign ::= + | - <b>[§<a href = "1076_7.HTM#7.2"> 7.2</a>]</b>
signal_assignment_statement ::= <b>[§<a href = "1076_8.HTM#8.4"> 8.4</a>]</b>
[ label : ] target <= [ delay_mechanism ] waveform ;
signal_declaration ::= <b>[§<a href = "1076_4.HTM#4.3.1.2"> 4.3.1.2</a>]</b>
<b>signal</b> identifier_list : subtype_indication [ signal_kind ] [ := expression ] ;
signal_kind ::= <b>register</b> | <b>bus [§</b>; <b> <a href = "1076_4.HTM#4.3.1.2"> 4.3.1.2</a>]</b>
signal_list ::= <b>[§<a href = "1076_5.HTM#5.3"> 5.3</a>]</b>
<i>signal</i>_name { , <i>signal</i>_name }
| <b>others</b>
| <b>all</b>
signature ::= [ [ type_mark { , type_mark } ] [ <b>return</b> type_mark ] ] <b>[§<a href = "1076_2.HTM#2.3.2"> 2.3.2</a>]</b>
simple_expression ::= <b>[§<a href = "1076_7.HTM#7.1"> 7.1</a>]</b>
[ sign ] term { adding_operator term }
simple_name ::= identifier <b>[§<a href = "1076_6.HTM#6.2"> 6.2</a>]</b>
slice_name ::= prefix ( discrete_range ) <b>[§<a href = "1076_6.HTM#6.5"> 6.5</a>]</b>
string_literal ::= " { graphic_character } " <b>[§<a href = "1076_13.HTM#13.6"> 13.6</a>]</b>
subprogram_body ::= <b>[§<a href = "1076_2.HTM#2.2"> 2.2</a>]</b>
subprogram_specification <b>is</b>
<b> </b>subprogram_declarative_part
<b>begin</b>
subprogram_statement_part
<b>end</b> [ subprogram_kind ] [ designator ] ;
subprogram_declaration ::= <b>[§<a href = "1076_2.HTM#2.1"> 2.1</a>]</b>
</pre>
<pre> subprogram_specification ;
subprogram_declarative_item ::= <b>[§<a href = "1076_2.HTM#2.2"> 2.2</a>]</b>
subprogram_declaration
| subprogram_body
| type_declaration
| subtype_declaration
| constant_declaration
| variable_declaration
| file_declaration
| alias_declaration
| attribute_declaration
| attribute_specification
| use_clause
| group_template_declaration
| group_declaration
subprogram_declarative_part ::= <b>[§<a href = "1076_2.HTM#2.2"> 2.2</a>]</b>
{ subprogram_declarative_item }
subprogram_kind ::= <b>procedure</b> | <b>function</b> <b>[§<a href = "1076_2.HTM#2.2"> 2.2</a>]</b>
subprogram_specification ::= <b>[§<a href = "1076_2.HTM#2.1"> 2.1</a>]</b>
<b>procedure</b> designator [ ( formal_parameter_list ) ]
| [ <b>pure</b> | <b>impure</b> ] <b>function</b> designator [ ( formal_parameter_list ) ]
<b>return</b> type_mark
subprogram_statement_part ::= <b>[§<a href = "1076_2.HTM#2.2"> 2.2</a>]</b>
{ sequential_statement }
subtype_declaration ::= <b>[§<a href = "1076_4.HTM#4.2"> 4.2</a>]</b>
<b>subtype</b> identifier <b>is</b> subtype_indication ;
subtype_indication ::= <b>[§<a href = "1076_4.HTM#4.2"> 4.2</a>]</b>
[ <i>resolution_function</i>_name ] type_mark [ constraint ]
suffix ::= <b>[§<a href = "1076_6.HTM#6.3"> 6.3</a>]</b>
simple_name
| character_literal
| operator_symbol
| <b>all</b>
target ::= <b>[§<a href = "1076_8.HTM#8.4"> 8.4</a>]</b>
name
| aggregate
term ::= <b>[§<a href = "1076_7.HTM#7.1"> 7.1</a>]</b>
factor { multiplying_operator factor }
timeout_clause ::= <b>for</b> <i>time</i>_expression <b>[§<a href = "1076_8.HTM#8.1"> 8.1</a>]</b>
type_conversion ::= type_mark ( expression ) <b>[§<a href = "1076_7.HTM#7.3.5"> 7.3.5</a>]</b>
type_declaration ::= <b>[§<a href = "1076_4.HTM#4.1"> 4.1</a>]</b>
full_type_declaration
| incomplete_type_declaration
type_definition ::= <b>[§<a href = "1076_4.HTM#4.1"> 4.1</a>]</b>
scalar_type_definition
| composite_type_definition
| access_type_definition
| file_type_definition
type_mark ::= <b>[§<a href = "1076_4.HTM#4.2"> 4.2</a>]</b>
<i>type</i>_name
| <i>subtype</i>_name
unconstrained_array_definition ::= <b>[§<a href = "1076_3.HTM#3.2.1"> 3.2.1</a>]</b>
</pre>
<pre> <b>array</b> ( index_subtype_definition { , index_subtype_definition } )
<b>of</b> <i>element</i>_subtype_indication
use_clause ::= <b>[§<a href = "1076_10.HTM#10.4"> 10.4</a>]</b>
<b>use</b> selected_name { , selected_name } ;
variable_assignment_statement ::= <b>[§<a href = "1076_8.HTM#8.5"> 8.5</a>]</b>
[ label : ] target<i> </i> := expression ;
variable_declaration ::= <b>[§<a href = "1076_4.HTM#4.3.1.3"> 4.3.1.3</a>]</b>
[ <b>shared</b> ] <b>variable</b> identifier_list : subtype_indication [ := expression ] ;
wait_statement ::= <b>[§<a href = "1076_8.HTM#8.1"> 8.1</a>]</b>
[ label : ] <b>wait</b> [ sensitivity_clause ] [ condition_clause ] [ timeout_clause ] ;
waveform ::= <b>[§<a href = "1076_8.HTM#8.4"> 8.4</a>]</b>
waveform_element { , waveform_element }
| <b>unaffected</b>
waveform_element ::= <b>[§<a href = "1076_8.HTM#8.4.1"> 8.4.1</a>]</b>
<i> value</i>_expression [ <b>after</b> <i>time</i>_expression ]
| <b>null</b> [ <b>after</b> <i>time</i>_expression ]
</pre>
<HR>
<a href="../../HTML/HOMEPG.HTM"><img src="HP.GIF" border=0></a>
<a href="1076_TOC.HTM"><img src="TOP.GIF" BORDER=0></a>
<a href="1076_14.HTM"><img src="LEFT.GIF" border=0></a>
<a href="1076_AXB.HTM"><img src="RIGHT.GIF" border=0></a>
</body></html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -