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rules_vhdl.g4
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abstract_literal
: INTEGER
| REAL_LITERAL
| BASE_LITERAL
;
access_type_definition
: ACCESS subtype_indication
;
across_aspect
: identifier_list (tolerance_aspect)? (VARASGN expression)? ACROSS
;
actual_designator
: expression
| OPEN
;
actual_parameter_part
: association_list
;
actual_part
: name LPAREN actual_designator RPAREN
| actual_designator
;
adding_operator
: PLUS
| MINUS
| AMPERSAND
;
aggregate
: LPAREN element_association (COMMA element_association)* RPAREN
;
alias_declaration
: ALIAS alias_designator (COLON alias_indication)? IS name (signature)? SEMI
;
alias_designator
: identifier
| CHARACTER_LITERAL
| STRING_LITERAL
;
alias_indication
: subnature_indication
| subtype_indication
;
allocator
: NEW (qualified_expression | subtype_indication)
;
architecture_body
: ARCHITECTURE identifier OF identifier IS architecture_declarative_part BEGIN architecture_statement_part END (
ARCHITECTURE
)? (identifier)? SEMI
;
architecture_declarative_part
: (block_declarative_item)*
;
architecture_statement
: block_statement
| process_statement
| ( label_colon)? concurrent_procedure_call_statement
| ( label_colon)? concurrent_assertion_statement
| ( label_colon)? ( POSTPONED)? concurrent_signal_assignment_statement
| component_instantiation_statement
| generate_statement
| concurrent_break_statement
| simultaneous_statement
;
architecture_statement_part
: (architecture_statement)*
;
array_nature_definition
: unconstrained_nature_definition
| constrained_nature_definition
;
array_type_definition
: unconstrained_array_definition
| constrained_array_definition
;
assertion
: ASSERT condition (REPORT expression)? (SEVERITY expression)?
;
assertion_statement
: (label_colon)? assertion SEMI
;
association_element
: (formal_part ARROW)? actual_part
;
association_list
: association_element (COMMA association_element)*
;
attribute_declaration
: ATTRIBUTE label_colon name SEMI
;
// Need to add several tokens here, for they are both, VHDLAMS reserved words
// and attribute names.
// (25.2.2004, e.f.)
attribute_designator
: identifier
| RANGE
| REVERSE_RANGE
| ACROSS
| THROUGH
| REFERENCE
| TOLERANCE
;
attribute_specification
: ATTRIBUTE attribute_designator OF entity_specification IS expression SEMI
;
base_unit_declaration
: identifier SEMI
;
binding_indication
: (USE entity_aspect)? (generic_map_aspect)? (port_map_aspect)?
;
block_configuration
: FOR block_specification (use_clause)* (configuration_item)* END FOR SEMI
;
block_declarative_item
: subprogram_declaration
| subprogram_body
| type_declaration
| subtype_declaration
| constant_declaration
| signal_declaration
| variable_declaration
| file_declaration
| alias_declaration
| component_declaration
| attribute_declaration
| attribute_specification
| configuration_specification
| disconnection_specification
| step_limit_specification
| use_clause
| group_template_declaration
| group_declaration
| nature_declaration
| subnature_declaration
| quantity_declaration
| terminal_declaration
;
block_declarative_part
: (block_declarative_item)*
;
block_header
: (generic_clause ( generic_map_aspect SEMI)?)? (port_clause ( port_map_aspect SEMI)?)?
;
block_specification
: identifier (LPAREN index_specification RPAREN)?
| name
;
block_statement
: label_colon BLOCK (LPAREN expression RPAREN)? (IS)? block_header block_declarative_part BEGIN block_statement_part END BLOCK (
identifier
)? SEMI
;
block_statement_part
: (architecture_statement)*
;
branch_quantity_declaration
: QUANTITY (across_aspect)? (through_aspect)? terminal_aspect SEMI
;
break_element
: (break_selector_clause)? name ARROW expression
;
break_list
: break_element (COMMA break_element)*
;
break_selector_clause
: FOR name USE
;
break_statement
: (label_colon)? BREAK (break_list)? (WHEN condition)? SEMI
;
case_statement
: (label_colon)? CASE expression IS (case_statement_alternative)+ END CASE (identifier)? SEMI
;
case_statement_alternative
: WHEN choices ARROW sequence_of_statements
;
choice
: identifier
| discrete_range
| simple_expression
| OTHERS
;
choices
: choice (BAR choice)*
;
component_configuration
: FOR component_specification (binding_indication SEMI)? (block_configuration)? END FOR SEMI
;
component_declaration
: COMPONENT identifier (IS)? (generic_clause)? (port_clause)? END COMPONENT (identifier)? SEMI
;
component_instantiation_statement
: label_colon instantiated_unit (generic_map_aspect)? (port_map_aspect)? SEMI
;
component_specification
: instantiation_list COLON name
;
composite_nature_definition
: array_nature_definition
| record_nature_definition
;
composite_type_definition
: array_type_definition
| record_type_definition
;
concurrent_assertion_statement
: (label_colon)? (POSTPONED)? assertion SEMI
;
concurrent_break_statement
: (label_colon)? BREAK (break_list)? (sensitivity_clause)? (WHEN condition)? SEMI
;
concurrent_procedure_call_statement
: (label_colon)? (POSTPONED)? procedure_call SEMI
;
concurrent_signal_assignment_statement
: (label_colon)? (POSTPONED)? (conditional_signal_assignment | selected_signal_assignment)
;
condition
: expression
;
condition_clause
: UNTIL condition
;
conditional_signal_assignment
: target LE opts conditional_waveforms SEMI
;
conditional_waveforms
: waveform (WHEN condition (ELSE conditional_waveforms)?)?
;
configuration_declaration
: CONFIGURATION identifier OF name IS configuration_declarative_part block_configuration END (
CONFIGURATION
)? (identifier)? SEMI
;
configuration_declarative_item
: use_clause
| attribute_specification
| group_declaration
;
configuration_declarative_part
: (configuration_declarative_item)*
;
configuration_item
: block_configuration
| component_configuration
;
configuration_specification
: FOR component_specification binding_indication SEMI
;
constant_declaration
: CONSTANT identifier_list COLON subtype_indication (VARASGN expression)? SEMI
;
constrained_array_definition
: ARRAY index_constraint OF subtype_indication
;
constrained_nature_definition
: ARRAY index_constraint OF subnature_indication
;
constraint
: range_constraint
| index_constraint
;
context_clause
: (context_item)*
;
context_item
: library_clause
| use_clause
;
delay_mechanism
: TRANSPORT
| ( REJECT expression)? INERTIAL
;
design_file
: (design_unit)* EOF
;
design_unit
: context_clause library_unit
;
designator
: identifier
| STRING_LITERAL
;
direction
: TO
| DOWNTO
;
disconnection_specification
: DISCONNECT guarded_signal_specification AFTER expression SEMI
;
discrete_range
: range_decl
| subtype_indication
;
element_association
: (choices ARROW)? expression
;
element_declaration
: identifier_list COLON element_subtype_definition SEMI
;
element_subnature_definition
: subnature_indication
;
element_subtype_definition
: subtype_indication
;
entity_aspect
: ENTITY name (LPAREN identifier RPAREN)?
| CONFIGURATION name
| OPEN
;
entity_class
: ENTITY
| ARCHITECTURE
| CONFIGURATION
| PROCEDURE
| FUNCTION
| PACKAGE
| TYPE
| SUBTYPE
| CONSTANT
| SIGNAL
| VARIABLE
| COMPONENT
| LABEL
| LITERAL
| UNITS
| GROUP
| FILE
| NATURE
| SUBNATURE
| QUANTITY
| TERMINAL
;
entity_class_entry
: entity_class (BOX)?
;
entity_class_entry_list
: entity_class_entry (COMMA entity_class_entry)*
;
entity_declaration
: ENTITY identifier IS entity_header entity_declarative_part (BEGIN entity_statement_part)? END (
ENTITY
)? (identifier)? SEMI
;
entity_declarative_item
: subprogram_declaration
| subprogram_body
| type_declaration
| subtype_declaration
| constant_declaration
| signal_declaration
| variable_declaration
| file_declaration
| alias_declaration
| attribute_declaration
| attribute_specification
| disconnection_specification
| step_limit_specification
| use_clause
| group_template_declaration
| group_declaration
| nature_declaration
| subnature_declaration
| quantity_declaration
| terminal_declaration
;
entity_declarative_part
: (entity_declarative_item)*
;
entity_designator
: entity_tag (signature)?
;
entity_header
: (generic_clause)? (port_clause)?
;
entity_name_list
: entity_designator (COMMA entity_designator)*
| OTHERS
| ALL
;
entity_specification
: entity_name_list COLON entity_class
;
entity_statement
: concurrent_assertion_statement
| process_statement
| concurrent_procedure_call_statement
;
entity_statement_part
: (entity_statement)*
;
entity_tag
: identifier
| CHARACTER_LITERAL
| STRING_LITERAL
;
enumeration_literal
: identifier
| CHARACTER_LITERAL
;
enumeration_type_definition
: LPAREN enumeration_literal (COMMA enumeration_literal)* RPAREN
;
exit_statement
: (label_colon)? EXIT (identifier)? (WHEN condition)? SEMI
;
// NOTE that NAND/NOR are in (...)* now (used to be in (...)?).
// (21.1.2004, e.f.)
expression
: relation (: logical_operator relation)*
;
factor
: primary (: DOUBLESTAR primary)?
| ABS primary
| NOT primary
;
file_declaration
: FILE identifier_list COLON subtype_indication (file_open_information)? SEMI
;
file_logical_name
: expression
;
file_open_information
: (OPEN expression)? IS file_logical_name
;
file_type_definition
: FILE OF subtype_indication
;
formal_parameter_list
: interface_list
;
formal_part
: identifier
| identifier LPAREN explicit_range RPAREN
;
free_quantity_declaration
: QUANTITY identifier_list COLON subtype_indication (VARASGN expression)? SEMI
;
generate_statement
: label_colon generation_scheme GENERATE (( block_declarative_item)* BEGIN)? (
architecture_statement
)* END GENERATE (identifier)? SEMI
;
generation_scheme
: FOR parameter_specification
| IF condition
;
generic_clause
: GENERIC LPAREN generic_list RPAREN SEMI
;
generic_list
: interface_constant_declaration (SEMI interface_constant_declaration)*
;
generic_map_aspect
: GENERIC MAP LPAREN association_list RPAREN
;
group_constituent
: name
| CHARACTER_LITERAL
;
group_constituent_list
: group_constituent (COMMA group_constituent)*
;
group_declaration
: GROUP label_colon name LPAREN group_constituent_list RPAREN SEMI
;
group_template_declaration
: GROUP identifier IS LPAREN entity_class_entry_list RPAREN SEMI
;
guarded_signal_specification
: signal_list COLON name
;
identifier
: BASIC_IDENTIFIER
| EXTENDED_IDENTIFIER
;
identifier_list
: identifier (COMMA identifier)*
;
if_statement
: (label_colon)? IF condition THEN sequence_of_statements (
ELSIF condition THEN sequence_of_statements
)* (ELSE sequence_of_statements)? END IF (identifier)? SEMI
;
index_constraint
: LPAREN discrete_range (COMMA discrete_range)* RPAREN
;
index_specification
: discrete_range
| expression
;
index_subtype_definition
: name RANGE BOX
;
instantiated_unit
: (COMPONENT)? name
| ENTITY name ( LPAREN identifier RPAREN)?
| CONFIGURATION name
;
instantiation_list
: identifier (COMMA identifier)*
| OTHERS
| ALL
;
interface_constant_declaration
: (CONSTANT)? identifier_list COLON (IN)? subtype_indication (VARASGN expression)?
;
interface_declaration
: interface_constant_declaration
| interface_signal_declaration
| interface_variable_declaration
| interface_file_declaration
| interface_terminal_declaration
| interface_quantity_declaration
;
interface_element
: interface_declaration
;
interface_file_declaration
: FILE identifier_list COLON subtype_indication
;
interface_signal_list
: interface_signal_declaration (SEMI interface_signal_declaration)*
;
interface_port_list
: interface_port_declaration (SEMI interface_port_declaration)*
;
interface_list
: interface_element (SEMI interface_element)*
;
interface_quantity_declaration
: QUANTITY identifier_list COLON (IN | OUT)? subtype_indication (VARASGN expression)?
;
interface_port_declaration
: identifier_list COLON (signal_mode)? subtype_indication (BUS)? (VARASGN expression)?
;
interface_signal_declaration
: SIGNAL identifier_list COLON (signal_mode)? subtype_indication (BUS)? (VARASGN expression)?
;
interface_terminal_declaration
: TERMINAL identifier_list COLON subnature_indication
;
interface_variable_declaration
: (VARIABLE)? identifier_list COLON (signal_mode)? subtype_indication (VARASGN expression)?
;
iteration_scheme
: WHILE condition
| FOR parameter_specification
;
label_colon
: identifier COLON
;
library_clause
: LIBRARY logical_name_list SEMI
;
library_unit
: secondary_unit
| primary_unit
;
literal
: NULL
| BIT_STRING_LITERAL
| STRING_LITERAL
| enumeration_literal
| numeric_literal
;
logical_name
: identifier
;
logical_name_list
: logical_name (COMMA logical_name)*
;
logical_operator
: AND
| OR
| NAND
| NOR
| XOR
| XNOR
;
loop_statement
: (label_colon)? (iteration_scheme)? LOOP sequence_of_statements END LOOP (identifier)? SEMI
;
signal_mode
: IN
| OUT
| INOUT
| BUFFER
| LINKAGE
;
multiplying_operator
: MUL
| DIV
| MOD
| REM
;
// was
// name
// : simple_name
// | operator_symbol
// | selected_name
// | indexed_name
// | slice_name
// | attribute_name
// ;
// changed to avoid left-recursion to name (from selected_name, indexed_name,
// slice_name, and attribute_name, respectively)
// (2.2.2004, e.f.) + (12.07.2017, o.p.)
name
: (identifier | STRING_LITERAL) (name_part)*
;
name_part
: selected_name_part
| function_call_or_indexed_name_part
| slice_name_part
| attribute_name_part
;
selected_name
: identifier (DOT suffix)*
;
selected_name_part
: (DOT suffix)+
;
function_call_or_indexed_name_part
: LPAREN actual_parameter_part RPAREN
;
slice_name_part
: LPAREN discrete_range RPAREN
;
attribute_name_part
: (signature)? APOSTROPHE attribute_designator (LPAREN expression RPAREN)?
;
nature_declaration
: NATURE identifier IS nature_definition SEMI
;
nature_definition
: scalar_nature_definition
| composite_nature_definition
;
nature_element_declaration
: identifier_list COLON element_subnature_definition
;
next_statement
: (label_colon)? NEXT (identifier)? (WHEN condition)? SEMI
;
numeric_literal
: abstract_literal
| physical_literal
;
object_declaration
: constant_declaration
| signal_declaration
| variable_declaration
| file_declaration
| terminal_declaration
| quantity_declaration
;
opts
: (GUARDED)? (delay_mechanism)?
;
package_body
: PACKAGE BODY identifier IS package_body_declarative_part END (PACKAGE BODY)? (identifier)? SEMI
;
package_body_declarative_item
: subprogram_declaration
| subprogram_body
| type_declaration
| subtype_declaration
| constant_declaration
| variable_declaration
| file_declaration
| alias_declaration
| use_clause
| group_template_declaration
| group_declaration
;
package_body_declarative_part
: (package_body_declarative_item)*
;
package_declaration
: PACKAGE identifier IS package_declarative_part END (PACKAGE)? (identifier)? SEMI
;
package_declarative_item
: subprogram_declaration
| subprogram_body
| type_declaration
| subtype_declaration
| constant_declaration
| signal_declaration
| variable_declaration
| file_declaration
| alias_declaration
| component_declaration
| attribute_declaration
| attribute_specification
| disconnection_specification
| use_clause
| group_template_declaration
| group_declaration
| nature_declaration
| subnature_declaration
| terminal_declaration
;
package_declarative_part
: (package_declarative_item)*
;
parameter_specification
: identifier IN discrete_range
;
physical_literal
: abstract_literal (: identifier)
;
physical_type_definition
: range_constraint UNITS base_unit_declaration (secondary_unit_declaration)* END UNITS (
identifier
)?
;
port_clause
: PORT LPAREN port_list RPAREN SEMI
;
port_list
: interface_port_list
;
port_map_aspect
: PORT MAP LPAREN association_list RPAREN
;
primary
: literal
| qualified_expression
| LPAREN expression RPAREN
| allocator
| aggregate
| name
;
primary_unit
: entity_declaration
| configuration_declaration
| package_declaration
;
procedural_declarative_item
: subprogram_declaration
| subprogram_body
| type_declaration
| subtype_declaration
| constant_declaration
| variable_declaration
| alias_declaration
| attribute_declaration
| attribute_specification
| use_clause
| group_template_declaration
| group_declaration
;
procedural_declarative_part
: (procedural_declarative_item)*
;
procedural_statement_part
: (sequential_statement)*
;
procedure_call
: selected_name (LPAREN actual_parameter_part RPAREN)?
;
procedure_call_statement
: (label_colon)? procedure_call SEMI
;
process_declarative_item
: 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
: (process_declarative_item)*
;
process_statement
: (label_colon)? (POSTPONED)? PROCESS (LPAREN sensitivity_list RPAREN)? (IS)? process_declarative_part BEGIN process_statement_part END (
POSTPONED
)? PROCESS (identifier)? SEMI
;
process_statement_part
: (sequential_statement)*
;
qualified_expression
: subtype_indication APOSTROPHE (aggregate | LPAREN expression RPAREN)
;
quantity_declaration
: free_quantity_declaration
| branch_quantity_declaration
| source_quantity_declaration
;
quantity_list
: name (COMMA name)*
| OTHERS
| ALL
;
quantity_specification
: quantity_list COLON name
;
range_decl
: explicit_range