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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: A B S;
ACCESS : A C C E S S;
ACROSS : A C R O S S;
AFTER : A F T E R;
ALIAS : A L I A S;
ALL : A L L;
AND : A N D;
ARCHITECTURE : A R C H I T E C T U R E;
ARRAY : A R R A Y;
ASSERT : A S S E R T;
ATTRIBUTE : A T T R I B U T E;
BEGIN : B E G I N;
BLOCK : B L O C K;
BODY : B O D Y;
BREAK : B R E A K;
BUFFER : B U F F E R;
BUS : B U S;
CASE : C A S E;
COMPONENT : C O M P O N E N T;
CONFIGURATION : C O N F I G U R A T I O N;
CONSTANT : C O N S T A N T;
DISCONNECT : D I S C O N N E C T;
DOWNTO : D O W N T O;
END : E N D;
ENTITY : E N T I T Y;
ELSE : E L S E;
ELSIF : E L S I F;
EXIT : E X I T;
FILE : F I L E;
FOR : F O R;
FUNCTION : F U N C T I O N;
GENERATE : G E N E R A T E;
GENERIC : G E N E R I C;
GROUP : G R O U P;
GUARDED : G U A R D E D;
IF : I F;
IMPURE : I M P U R E;
IN : I N;
INERTIAL : I N E R T I A L;
INOUT : I N O U T;
IS : I S;
LABEL : L A B E L;
LIBRARY : L I B R A R Y;
LIMIT : L I M I T;
LINKAGE : L I N K A G E;
LITERAL : L I T E R A L;
LOOP : L O O P;
MAP : M A P;
MOD : M O D;
NAND : N A N D;
NATURE : N A T U R E;
NEW : N E W;
NEXT : N E X T;
NOISE : N O I S E;
NOR : N O R;
NOT : N O T;
NULL_SYM : N U L L;
OF : O F;
ON : O N;
OPEN : O P E N;
OR : O R;
OTHERS : O T H E R S;
OUT : O U T;
PACKAGE : P A C K A G E;
PORT : P O R T;
POSTPONED : P O S T P O N E D;
PROCESS : P R O C E S S;
PROCEDURE : P R O C E D U R E;
PROCEDURAL : P R O C E D U R A L;
PURE : P U R E;
QUANTITY : Q U A N T I T Y;
RANGE : R A N G E;
REVERSE_RANGE : R E V E R S E '_' R A N G E;
REJECT : R E J E C T;
REM : R E M;
RECORD : R E C O R D;
REFERENCE : R E F E R E N C E;
REGISTER : R E G I S T E R;
REPORT : R E P O R T;
RETURN : R E T U R N;
ROL : R O L;
ROR : R O R;
SELECT : S E L E C T;
SEVERITY : S E V E R I T Y;
SHARED : S H A R E D;
SIGNAL : S I G N A L;
SLA : S L A;
SLL : S L L;
SPECTRUM : S P E C T R U M;
SRA : S R A;
SRL : S R L;
SUBNATURE : S U B N A T U R E;
SUBTYPE : S U B T Y P E;
TERMINAL : T E R M I N A L;
THEN : T H E N;
THROUGH : T H R O U G H;
TO : T O;
TOLERANCE : T O L E R A N C E;
TRANSPORT : T R A N S P O R T;
TYPE : T Y P E;
UNAFFECTED : U N A F F E C T E D;
UNITS : U N I T S;
UNTIL : U N T I L;
USE : U S E;
VARIABLE : V A R I A B L E;
WAIT : W A I T;
WITH : W I T H;
WHEN : W H E N;
WHILE : W H I L E;
XNOR : X N O R;
XOR : X O R;
// case insensitive chars
fragment A:('a'|'A');
fragment B:('b'|'B');
fragment C:('c'|'C');
fragment D:('d'|'D');
fragment E:('e'|'E');
fragment F:('f'|'F');
fragment G:('g'|'G');
fragment H:('h'|'H');
fragment I:('i'|'I');
fragment J:('j'|'J');
fragment K:('k'|'K');
fragment L:('l'|'L');
fragment M:('m'|'M');
fragment N:('n'|'N');
fragment O:('o'|'O');
fragment P:('p'|'P');
fragment Q:('q'|'Q');
fragment R:('r'|'R');
fragment S:('s'|'S');
fragment T:('t'|'T');
fragment U:('u'|'U');
fragment V:('v'|'V');
fragment W:('w'|'W');
fragment X:('x'|'X');
fragment Y:('y'|'Y');
fragment Z:('z'|'Z');
//------------------------------------------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 ( : 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 (IN|OUT|INOUT)? 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_SYM
| 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_part_specificator)*
;
name_part_specificator
: 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
;