/
vhdl.g4
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vhdl.g4
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//
// Copyright (C) 2010-2014 Denis Gavrish
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
grammar vhdl;
ABS:'abs';
ACCESS : 'access';
ACROSS : 'across';
AFTER : 'after';
ALIAS : 'alias';
ALL : 'all';
AND : 'and';
ARCHITECTURE : 'architecture';
ARRAY : 'array';
ASSERT : 'assert';
ATTRIBUTE : 'attribute';
BEGIN : 'begin';
BLOCK : 'block';
BODY : 'body';
BREAK : 'break';
BUFFER : 'buffer';
BUS : 'bus';
CASE : 'case';
COMPONENT : 'component';
CONFIGURATION : 'configuration';
CONSTANT : 'constant';
DISCONNECT : 'disconnect';
DOWNTO : 'downto';
END : 'end';
ENTITY : 'entity';
ELSE : 'else';
ELSIF : 'elsif';
EXIT : 'exit';
FILE : 'file';
FOR : 'for';
FUNCTION : 'function';
GENERATE : 'generate';
GENERIC : 'generic';
GROUP : 'group';
GUARDED : 'guarded';
IF : 'if';
IMPURE : 'impure';
IN : 'in';
INERTIAL : 'inertial';
INOUT : 'inout';
IS : 'is';
LABEL : 'label';
LIBRARY : 'library';
LIMIT : 'limit';
LINKAGE : 'linkage';
LITERAL : 'literal';
LOOP : 'loop';
MAP : 'map';
MOD : 'mod';
NAND : 'nand';
NATURE : 'nature';
NEW : 'new';
NEXT : 'next';
NOISE : 'noise';
NOR : 'nor';
NOT : 'not';
NULL : 'null';
OF : 'of';
ON : 'on';
OPEN : 'open';
OR : 'or';
OTHERS : 'others';
OUT : 'out';
PACKAGE : 'package';
PORT : 'port';
POSTPONED : 'postponed';
PROCESS : 'process';
PROCEDURE : 'procedure';
PROCEDURAL : 'procedural';
PURE : 'pure';
QUANTITY : 'quantity';
RANGE : 'range';
REVERSE_RANGE : 'reverse_range';
REJECT : 'reject';
REM : 'rem';
RECORD : 'record';
REFERENCE : 'reference';
REGISTER : 'register';
REPORT : 'report';
RETURN : 'return';
ROL : 'rol';
ROR : 'ror';
SELECT : 'select';
SEVERITY : 'severity';
SHARED : 'shared';
SIGNAL : 'signal';
SLA : 'sla';
SLL : 'sll';
SPECTRUM : 'spectrum';
SRA : 'sra';
SRL : 'srl';
SUBNATURE : 'subnature';
SUBTYPE : 'subtype';
TERMINAL : 'terminal';
THEN : 'then';
THROUGH : 'through';
TO : 'to';
TOLERANCE : 'tolerance';
TRANSPORT : 'transport';
TYPE : 'type';
UNAFFECTED : 'unaffected';
UNITS : 'units';
UNTIL : 'until';
USE : 'use';
VARIABLE : 'variable';
WAIT : 'wait';
WITH : 'with';
WHEN : 'when';
WHILE : 'while';
XNOR : 'xnor';
XOR : 'xor';
//------------------------------------------Parser----------------------------------------
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
| 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 ( options{greedy=true;}: logical_operator relation )*
;
factor
: primary ( options{greedy=true;}: 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 )?
;
interface_signal_declaration
: SIGNAL identifier_list COLON 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.)
name
: selected_name
| name_part ( DOT name_part)*
;
name_part
: selected_name (name_attribute_part | name_function_call_or_indexed_part | name_slice_part)?
;
name_attribute_part
: APOSTROPHE attribute_designator ( expression ( COMMA expression )* )?
;
name_function_call_or_indexed_part
: LPAREN actual_parameter_part? RPAREN
;
name_slice_part
: LPAREN explicit_range ( COMMA explicit_range )* RPAREN
;
selected_name
: identifier (DOT suffix)*
;
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