Class: Vertigo::Parser

Inherits:
GenericParser show all
Defined in:
lib/vertigo/parser.rb

Constant Summary collapse

ADDITIV_OP =

xor ?

[:add,:sub, :or, :xor,:xnor, :nor]
MULTITIV_OP =

exp ?

[:mul,:div,:mod,:and,:nand,:shiftr,:shiftl,:exp]
COMPARISON_OP = 
[:eq,:neq,:gt,:gte,:lt,:lte,:leq]

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from GenericParser

#acceptIt, #expect, #lookahead, #maybe, #more?, #next_tokens, #niy, #showNext

Constructor Details

#initialize(options = {}) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/vertigo/parser.rb', line 13

def initialize options={}
  @options=options
end

Instance Attribute Details

#basename ⇒ Object

Returns the value of attribute basename.



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# File 'lib/vertigo/parser.rb', line 11

def basename
  @basename
end

#filename ⇒ Object

Returns the value of attribute filename.



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# File 'lib/vertigo/parser.rb', line 11

def filename
  @filename
end

#lexer ⇒ Object

Returns the value of attribute lexer.



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# File 'lib/vertigo/parser.rb', line 10

def lexer
  @lexer
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/vertigo/parser.rb', line 9

def options
  @options
end

#tokens ⇒ Object

Returns the value of attribute tokens.



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# File 'lib/vertigo/parser.rb', line 10

def tokens
  @tokens
end

Instance Method Details

#after? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1457

def after?
  if showNext.is_a?(:after)
    ret=After.new
    acceptIt
    ret.rhs=parse_expression
    return ret
  end
end

#aggregated? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1341

def aggregated?
  if showNext.is_a? [:comma]
    ret=Aggregate.new
    ret.pos=showNext.pos
    while showNext.is_a?(:comma)
      acceptIt
      ret << parse_aggregate_part
    end
    return ret
  end
end

#attributed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1475

def attributed?
  if showNext.is_a?(:attribute_literal)
    ret=Attributed.new
    ret.rhs=acceptIt
    return ret
  end
end

#concat? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1466

def concat?
  if showNext.is_a?(:ampersand)
    ret=Concat.new
    acceptIt
    ret.rhs=parse_expression
    return ret
  end
end

#consume_to(token_kind) ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 71

def consume_to token_kind
  while showNext && showNext.kind!=token_kind
    acceptIt
  end
  if showNext.nil?
    raise "cannot find token '#{token_kind}'"
  end
end

#fix_corner_case(e) ⇒ Object

z(0) := or (rs(15 downto 0)); zero := not (or e_in.write_data);



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# File 'lib/vertigo/parser.rb', line 1209

def fix_corner_case e
  case e
  when Binary
    if e.lhs.nil?
      ret=FuncCall.new
      ret.name=Ident.new(Vertigo::Token.create(:ident,e.op.val))
      case parenth=e.rhs
      when Parenth
        ret.actual_args=[parenth.expr].flatten
      else
        ret.actual_args=[e.rhs].flatten
      end
      return ret
    end
  end
  e
end

#initialized? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1450

def initialized?
  if showNext.is_a?(:vassign)
    acceptIt
    return parse_expression
  end
end

#isolated_range? ⇒ Boolean

—————————————————————–^ !!!! ..^.….. req_laddr <= r0.addr(63 downto LINE_OFF_BITS) & (LINE_OFF_BITS-1 downto 0 => ‘0’); ————————————————[ expr ] NOT used ?

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1373

def isolated_range?
  if showNext.is_a? [:downto,:to]
    acceptIt
    ret=IsolatedRange.new
    ret.rhs=parse_expression
    return ret
  end
end

#lex(filename) ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 17

def lex filename
  unless File.exists?(filename)
    raise "ERROR : cannot find file '#{filename}'"
  end
  begin
    str=IO.read(filename).downcase
    tokens=Lexer.new.tokenize(str)
    tokens=tokens.select{|t| t.class==Token} # filters [nil,nil,nil]
    tokens.reject!{|tok| tok.is_a? [:comment,:newline,:space]}
    return tokens
  rescue Exception=>e
    unless options[:mute]
      puts e.backtrace
      puts e
    end
    raise "an error occured during LEXICAL analysis. Sorry. Aborting."
  end
end

#mapped? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1382

def mapped?
  if showNext.is_a?(:imply)
    acceptIt
    ret=Map.new
    ret.rhs=parse_expression
    return ret
  end
end

#parenthesized? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1423

def parenthesized?
  if showNext.is_a? :lparen
    acceptIt
    ret=FuncCall.new
    args=[]
    while !showNext.is_a? :rparen
      args << parse_map()
      while showNext.is_a? :comma
        acceptIt
        args << parse_map()
      end
      ret.actual_args = args
      if showNext.is_a? [:downto,:to] #finally this was a Sliced !
        ret=Sliced.new
        ret.dir=acceptIt
        ret.rhs=parse_expression
        ret.lhs=args.first
      end
    end
    expect :rparen

    return ret
  else
    return false
  end
end

#parse(filename) ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 36

def parse filename
  begin
    @tokens=lex(filename)
    root=Root.new([])
    while @tokens.any?
      case showNext.kind
      when :comment
        root << acceptIt
      when :library
        root << parse_library
      when :use
        root << parse_use
      when :entity
        root << parse_entity
      when :architecture
        root << parse_architecture
      when :package
        root << parse_package
      when :configuration
        root << parse_configuration
      else
        raise "got #{showNext}"
      end
    end
  rescue Exception => e
    unless options[:mute]
      puts e.backtrace
      puts e
    end
    raise
  end
  root.flatten!
  root
end

#parse_additive ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1228

def parse_additive
  t1=parse_multiplicative
  while more? && showNext.is_a?(ADDITIV_OP)
    op=acceptIt #full token
    t2=parse_multiplicative
    t1=Binary.new(t1,op,t2)
  end
  return t1
end

#parse_aggregate_part ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1353

def parse_aggregate_part
  ret=parse_expression
  if showNext.is_a? [:downto,:to]
    dr=DiscreteRange.new
    dr.lhs=ret
    dr.dir=acceptIt
    dr.rhs=parse_expression
    ret=dr
  end
  if map=mapped?
    map.lhs=ret
    ret=map
  end
  ret
end

#parse_alias ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 597

def parse_alias
  ret=Alias.new # or ret=[] as for variable ?
  expect :alias
  ret.designator=Ident.new(expect :ident) # Warn : see designator in IEEE
  expect :colon
  ret.type=parse_type
  expect :is
  ret.name=Ident.new(expect :ident)
  ret.signature=nil #NIY
  unless showNext.is_a?(:semicolon)
    raise "ERROR : parse alias (signature not implemented yet)"
  end
  expect :semicolon
  ret
end

#parse_archi_body ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 613

def parse_archi_body
  ret=Body.new
  expect :begin
  while !showNext.is_a?(:end)
    ret << parse_concurrent_stmt
  end
  expect :end
  maybe :architecture
  maybe :ident
  expect :semicolon
  ret
end

#parse_archi_decls ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 264

def parse_archi_decls
  parse_decls
end

#parse_architecture ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 252

def parse_architecture
  archi=Architecture.new
  expect :architecture
  archi.name=expect(:ident)
  expect :of
  archi.entity_name=expect(:ident)
  expect :is
  archi.decls=parse_archi_decls
  archi.body=parse_archi_body
  archi
end

#parse_array_decl ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 388

def parse_array_decl
  ret=ArrayDecl.new
  expect :array
  expect :lparen
  ret.dim_decls=parse_array_dim_decls
  expect :rparen
  expect :of
  ret.type=parse_type
  ret
end

#parse_array_dim_decl ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 409

def parse_array_dim_decl
  ret=ArrayDimDecl.new
  case showNext.kind
  when :natural,:integer,:positive
    ret.type_mark=acceptIt
    expect :range
    ret.range=expect(:urange)
  else
    ret.range=parse_discrete_range
    # puts "ERROR : niy at #{showNext.pos}"
    # niy
  end
  ret
end

#parse_array_dim_decls ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 399

def parse_array_dim_decls
  ret=[]
  ret << parse_array_dim_decl
  while showNext.is_a?(:comma) #multi dimensions
    acceptIt
    ret << parse_array_dim_decl
  end
  ret
end

#parse_assert ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1152

def parse_assert
  ret=Assert.new
  expect :assert
  ret.cond=parse_expression
  if showNext.is_a?(:report)
    ret.report=parse_report
  end
  if showNext.is_a?(:severity)
    ret.severity=parse_severity
  end
  expect(:semicolon) unless ret.report
  ret
end

#parse_assign ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 982

def parse_assign
  lhs=parse_term

  if showNext.is_a? [:vassign,:leq,:semicolon]
    case showNext.kind
    when :vassign
      acceptIt
      ret=VarAssign.new(lhs)
    when :leq
      acceptIt
      ret=SigAssign.new(lhs)
    when :semicolon #assign? No ! Procedure call !
      acceptIt
      ret=ProcedureCall.new
      ret.name=lhs
      ret.actual_args=[]
      return ret
    end
  end

  ret.rhs=rhs=parse_expression
  case showNext.kind
  when :comma
    ret.rhs=wfm=Waveform.new
    wfm.elements << rhs
    while showNext.is_a?(:comma)
      acceptIt
      wfm.elements << parse_expression
    end
  when :when
    ret.rhs=cond=CondExpr.new
    while showNext.is_a?(:when) #cond assign
      cond.whens << when_=When.new
      got_when=true
      acceptIt
      when_.expr=rhs
      when_.cond=parse_expression
      expect :else
      rhs=parse_expression
    end
    cond.else_=rhs
  when :semicolon
    # pp showNext
    # ret.rhs=rhs
  else
    raise "unexpected error in parse assign : #{showNext.val}, at #{showNext.pos}"
  end
  expect :semicolon
  ret
end

#parse_attribute ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 544

def parse_attribute
  expect :attribute
  name=Ident.new(expect :ident)
  case showNext.kind
  when :colon #declaration
    ret=AttributeDecl.new
    ret.name=name
    acceptIt
    ret.type=parse_type
  when :of # specification
    ret=AttributeSpec.new
    ret.name=name
    acceptIt
    ret.entity_spec=parse_entity_spec
    expect :is
    ret.expr=parse_expression
  else
    raise "ERROR : parse attribute error at line #{showNext.line} #{showNext}"
  end
  expect :semicolon
  ret
end

#parse_body ⇒ Object

body


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# File 'lib/vertigo/parser.rb', line 933

def parse_body
  ret=Body.new
  while !showNext.is_a?(:end) and !showNext.is_a?(:elsif) and !showNext.is_a?(:else) and !showNext.is_a?(:when)
    ret << parse_seq_stmt
  end
  ret
end

#parse_case ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1081

def parse_case
  ret=Case.new
  expect :case
  ret.expr=parse_expression
  expect :is
  while showNext.is_a? :when
    ret << parse_when_case
  end
  expect :end
  expect :case
  expect :semicolon
  ret
end

#parse_comparative ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1250

def parse_comparative
  t1=parse_term
  while more? && showNext.is_a?(COMPARISON_OP)
    op=acceptIt
    t2=parse_term
    t1=Binary.new(t1,op,t2)
  end
  return t1
end

#parse_component_decl ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 531

def parse_component_decl
  ret=ComponentDecl.new
  expect :component
  ret.name=Ident.new(expect :ident)
  maybe :is
  ret.generics=parse_generics?
  ret.ports=parse_ports
  expect :end
  expect :component
  expect :semicolon
  ret
end

#parse_component_instanciation ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 700

def parse_component_instanciation
  ret=ComponentInstance.new
  maybe :component
  ret.name=expect :ident
  ret.generic_map=parse_generic_map?
  ret.port_map=parse_port_map?
  expect :semicolon
  ret
end

#parse_concurrent_stmt ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 626

def parse_concurrent_stmt
  label=parse_label?
  case showNext.kind
  when :process
    ret=parse_process
  when :entity
    ret=parse_entity_instanciation
  when :ident # assign or component instanciation
    case lookahead(2).kind
    when :port,:generic
      ret=parse_component_instanciation
    else
      ret=parse_assign
    end
  when :component
    ret=parse_component_instanciation
  when :with
    ret=parse_select
  when :if
    ret=parse_if_generate
  when :assert
    ret=parse_assert
  when :for
    ret=parse_for_generate
  else
    raise "parse_concurrent_stmt : #{pp showNext}"
  end
  ret.label=label if label
  ret
end

#parse_configuration ⇒ Object

configuration


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# File 'lib/vertigo/parser.rb', line 904

def parse_configuration
  expect :configuration
  expect :ident
  expect :of
  expect :ident
  expect :is
  parse_configuration_body
  expect :end
  expect :ident
  expect :semicolon
end

#parse_configuration_body ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 916

def parse_configuration_body
  case showNext.kind
  when :for
    parse_configuration_for
  else
    raise "ERROR : configurations not fully supported. Sorry."
  end
end

#parse_configuration_for ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 925

def parse_configuration_for
  expect :for
  expect :ident
  expect :end
  expect :for
  expect :semicolon
end

#parse_constant ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 298

def parse_constant
  ret=[]
  expect :constant
  ret << cst=Constant.new
  cst.name=Ident.new(expect :ident)
  while showNext.is_a?(:comma)
    acceptIt
    ret << cst=Constant.new
    cst.name=Ident.new(expect :ident)
  end
  expect :colon
  type=parse_type
  ret.each{|cst| cst.type=type}
  expect :vassign
  ret.last.expr=parse_expression
  expect :semicolon
  ret
end

#parse_decls ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 268

def parse_decls
  decls=[]
  while showNext.kind!=:begin and showNext.kind!=:end
    case showNext.kind
    when :constant
      decls << parse_constant
    when :type,:subtype
      decls << parse_typedecl
    when :signal
      decls << parse_signal
    when :procedure
      decls << parse_procedure
    when :function,:impure
      decls << parse_function
    when :component
      decls << parse_component_decl
    when :attribute
      decls << parse_attribute
    when :variable
      decls << parse_variable
    when :alias
      decls << parse_alias
    else
      raise "ERROR : parse_decls #{pp showNext}"
    end
  end
  decls.flatten!
  decls
end

#parse_discrete_range ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 242

def parse_discrete_range
  e1=parse_expression
  if showNext.is_a? [:downto,:to]
    dir=acceptIt
    e2=parse_expression
    return DiscreteRange.new(e1,dir,e2)
  end
  e1
end

#parse_else ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1060

def parse_else
  ret=Else.new
  expect :else
  ret.body=parse_body
  ret
end

#parse_elsif ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1051

def parse_elsif
  ret=Elsif.new
  expect :elsif
  ret.cond=parse_expression
  expect :then
  ret.body=parse_body
  ret
end

#parse_entity ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 108

def parse_entity
  entity=Entity.new
  expect :entity
  entity.name=Ident.new(expect :ident)
  expect :is
  entity.generics=parse_generics?
  if showNext.is_a? :port
    entity.ports=parse_ports
  end
  expect :end
  maybe :entity
  maybe :ident
  expect :semicolon
  return entity
end

#parse_entity_instanciation ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 728

def parse_entity_instanciation
  ret=EntityInstance.new
  expect :entity
  ret.full_name=parse_term # now ENSURE :selected_name
  case fc=ret.full_name
  when FuncCall
    ret.full_name=fc.name
    ret.arch_name=fc.actual_args.first
  end
  if showNext.is_a?(:lparen)
    acceptIt
    ret.arch_name=Ident.new(expect :ident)
    expect :rparen
  end
  ret.generic_map=parse_generic_map?
  ret.port_map=parse_port_map?
  expect :semicolon
  ret
end

#parse_entity_spec ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 567

def parse_entity_spec
  ret=EntitySpec.new
  ret.elements << Ident.new(expect :ident)
  while showNext.is_a?(:comma)
    acceptit
    ret.elements << Ident.new(expect :ident)
  end
  expect :colon
  ret.entity_class=acceptIt # entity,procedure, architecture etc...
  ret
end

#parse_enum ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 346

def parse_enum
  ret=EnumDecl.new
  expect :lparen
  ret << Ident.new(expect :ident)
  while showNext.is_a?(:comma)
    acceptIt
    ret << Ident.new(expect :ident)
  end
  expect :rparen
  ret
end

#parse_exit ⇒ Object

EXIT [ loop_label ] [ WHEN condition ] ;



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# File 'lib/vertigo/parser.rb', line 1188

def parse_exit
  expect :exit
  if showNext.is_a?(:ident)
    acceptIt
  end
  if showNext.is_a?(:when)
    acceptIt
    parse_expression
  end
  expect :semicolon
end

#parse_expression ⇒ Object

expression ===============================


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# File 'lib/vertigo/parser.rb', line 1201

def parse_expression
  e=parse_additive
  e=fix_corner_case(e) # things like => zero := not (or e_in.write_data);
  e
end

#parse_for ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1067

def parse_for
  expect :for
  expect :ident
  expect :in
  parse_discrete_range
  parse_loop
end

#parse_for_generate ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 827

def parse_for_generate
  ret=ForGenerate.new
  expect :for
  ret.index=Ident.new(acceptIt)
  expect :in
  ret.range=parse_discrete_range
  expect :generate

  # maybe local declarations :
  if showNext.is_a? [:signal,:constant]
    while showNext.is_not_a?(:begin)
      parse_decls
    end
  end

  #...or simply "begin"
  if showNext.is_a?(:begin)
    acceptIt
  end
  ret.body=body=Body.new

  while !showNext.is_a?(:end)
    body << parse_concurrent_stmt
  end
  expect :end
  expect :generate
  maybe :ident
  expect :semicolon
  ret
end

#parse_formal_arg ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 476

def parse_formal_arg
  ret=[]
  is_signal=(maybe :signal)
  ret << fp=FormalArg.new
  fp.name=Ident.new(expect :ident)
  while showNext.is_a?(:comma)
    acceptIt
    ret << fp=FormalArg.new
    fp.name=Ident.new(expect :ident)
  end
  expect :colon
  if showNext.is_a? [:in,:out,:inout]
    direction=acceptIt
  end
  type=parse_type
  ret.each{|fp|
    fp.direction=direction
    fp.type=type
  }
  ret
end

#parse_formal_args ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 465

def parse_formal_args
  ret=[]
  ret << parse_formal_arg
  while showNext.is_a?(:semicolon)
    acceptIt
    ret << parse_formal_arg
  end
  ret.flatten!
  ret
end

#parse_function ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 498

def parse_function
  ret=FuncDecl.new
  maybe :impure
  expect :function
  ret.name=Ident.new(expect :ident)
  if showNext.is_a?(:lparen)
    acceptIt
    ret.formal_args=parse_formal_args
    expect :rparen
  end

  expect :return
  ret.return_type=parse_type

  unless showNext.is_a?(:semicolon)
    expect :is
    ret.decls=parse_decls
    expect :begin
    ret.body=parse_body
    expect :end
    maybe :function
    maybe :ident
  else
    proto=FuncProtoDecl.new
    proto.name=ret.name
    proto.formal_args=ret.formal_args
    proto.return_type=ret.return_type
    ret=proto
  end
  expect :semicolon
  ret
end

#parse_generic ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 143

def parse_generic
  ids=[]
  ids << expect(:ident)
  while showNext.is_a? :comma
    acceptIt
    ids << expect(:ident)
  end
  expect :colon
  type=parse_type
  if showNext.is_a? :vassign
    acceptIt
    expr=parse_expression
  end
  ids.map{|id| Generic.new(id,type,expr)}
end

#parse_generic_map? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 710

def parse_generic_map?
  if showNext.is_a? :generic
    ret=GenericMap.new
    acceptIt
    expect :map
    expect :lparen
    while !showNext.is_a?(:rparen)
      ret << parse_map
      if showNext.is_a?(:comma)
        acceptIt
      end
    end
    expect :rparen
    return ret
  end
  nil
end

#parse_generics? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 124

def parse_generics?
  generics=[]
  if showNext.is_a? :generic
    generics=[]
    expect :generic
    expect :lparen
    while showNext.is_not_a? :rparen
      generics << parse_generic
      if showNext.is_a? :semicolon
        acceptIt
      end
    end
    expect :rparen
    expect :semicolon
  end
  generics.flatten!
  return generics
end

#parse_if_generate ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 798

def parse_if_generate
  #pp @tokens[0..5].map{|t| t.val}.join(' | ')
  ret=IfGenerate.new
  expect :if
  ret.cond=parse_expression
  expect :generate
  # maybe local declarations :
  if showNext.is_a? [:signal,:constant]
    while showNext.is_not_a?(:begin)
      parse_decls
    end
  end

  #...or simply "begin"
  if showNext.is_a?(:begin)
    acceptIt
  end
  ret.body=body=Body.new

  while !showNext.is_a?(:end)
    body << parse_concurrent_stmt
  end
  expect :end
  expect :generate
  maybe :ident
  expect :semicolon
  ret
end

#parse_if_stmt ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1033

def parse_if_stmt
  ret=If.new
  expect :if
  ret.cond=parse_expression
  expect :then
  ret.body=parse_body
  while showNext.is_a?(:elsif)
    ret.elsifs << parse_elsif
  end
  if showNext.is_a?(:else)
    ret.else_=parse_else
  end
  expect :end
  expect :if
  expect :semicolon
  ret
end

#parse_io ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 175

def parse_io
  ids=[]
  ids << expect(:ident)
  while showNext.is_a? :comma
    acceptIt
    ids << expect(:ident)
  end
  expect :colon
  if showNext.is_a? [:in,:out,:inout]
    dir=acceptIt
    dir=dir.kind
  end
  type=parse_type
  ids.map{|id|
    case dir
    when :in
      Input.new(id,type)
    when :out
      Output.new(id,type)
    when :inout
      InOut.new(id,type)
    end
  }
end

#parse_label? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 657

def parse_label?
  if lookahead(2).is_a?(:colon)
    ret=Label.new
    ret.ident=Ident.new(expect(:ident))
    expect(:colon)
    return ret
  end
end

#parse_library ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 80

def parse_library
  ret=[]
  expect :library
  ret << lib=Library.new
  lib.name=Ident.new(expect :ident)
  while showNext.is_a?(:comma)
    acceptIt
    ret << lib=Library.new
    lib.name=Ident.new(expect :ident)
  end
  expect :semicolon
  ret
end

#parse_loop ⇒ Object

unusual loop…end loop



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# File 'lib/vertigo/parser.rb', line 1178

def parse_loop #unusual loop...end loop
  expect :loop
  parse_body
  expect :end
  expect :loop
  maybe :ident
  expect :semicolon
end

#parse_map ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 765

def parse_map
  ret=parse_expression
  if map=mapped?
    map.lhs=ret
    ret=map
  end
  ret
end

#parse_multiplicative ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1239

def parse_multiplicative
  t1=parse_comparative
  while more? && showNext.is_a?(MULTITIV_OP)
    op=acceptIt
    t2=parse_comparative
    t1=Binary.new(t1,op,t2)
  end
  return t1
end

#parse_null_stmt ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 975

def parse_null_stmt
  ret=NullStmt.new
  expect :null
  expect :semicolon
  ret
end

#parse_package ⇒ Object

package


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# File 'lib/vertigo/parser.rb', line 859

def parse_package
  expect :package
  case showNext.kind
  when :ident
    ret=parse_package_decl
  when :body
    ret=parse_package_body
  else
    raise "ERROR : parse_package"
  end
end

#parse_package_body ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 886

def parse_package_body
  ret=PackageBody.new
  expect :body
  ret.name=Ident.new(expect :ident)
  expect :is
  while !showNext.is_a?(:end)
    ret.decls << parse_decls
  end
  ret.decls.flatten!
  expect :end
  maybe :package
  maybe :body
  maybe :ident
  expect :semicolon
  ret
end

#parse_package_decl ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 871

def parse_package_decl
  ret=Package.new
  ret.name=Ident.new(expect :ident)
  expect :is
  while !showNext.is_a?(:end)
    ret.decls << parse_decls
  end
  ret.decls.flatten!
  expect :end
  maybe :package
  maybe :ident
  expect :semicolon
  ret
end

#parse_parenth ⇒ Object

parenthesized expressions (NOT indexed or funcall)



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# File 'lib/vertigo/parser.rb', line 1329

def parse_parenth
  ret=Parenth.new
  expect :lparen
  ret.expr=expr=parse_aggregate_part
  if aggregate=aggregated?
    aggregate.elements.unshift expr
    ret=aggregate
  end
  expect :rparen
  ret
end

#parse_port_map? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 748

def parse_port_map?
  if showNext.is_a?(:port)
    ret=PortMap.new
    expect :port
    expect :map
    expect :lparen
    while !showNext.is_a?(:rparen)
      ret.elements << parse_map
      if showNext.is_a?(:comma)
        acceptIt
      end
    end
    expect :rparen
    return ret
  end
end

#parse_ports ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 159

def parse_ports
  ports=[]
  expect :port
  expect :lparen
  while showNext.is_not_a? :rparen
    ports << parse_io
    if showNext.is_a? :semicolon
      acceptIt
    end
  end
  expect :rparen
  expect :semicolon
  ports.flatten!
  ports
end

#parse_procedure ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 443

def parse_procedure
  ret=ProcedureDecl.new
  expect :procedure
  ret.name=Ident.new(expect :ident)
  if showNext.is_a?(:lparen)
    acceptIt
    ret.formal_args=parse_formal_args
    expect :rparen
  end
  if showNext.is_a?(:is)
    acceptIt
    ret.decls=parse_decls
    expect :begin
    ret.body=parse_body
    expect :end
    maybe :procedure
    maybe :ident
  end
  expect :semicolon
  ret
end

#parse_process ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 666

def parse_process
  ret=Vertigo::Process.new
  expect :process
  if showNext.is_a?(:lparen)
    ret.sensitivity=parse_sensitivity_list
  end
  ret.decls=parse_decls
  ret.decls.flatten!
  expect :begin
  ret.body=parse_body
  expect :end
  expect :process
  maybe :ident
  expect :semicolon
  ret
end

#parse_record ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 358

def parse_record
  ret=RecordDecl.new
  expect :record
  while showNext.not_a?(:end)
    ret.elements << parse_record_items
  end
  ret.elements.flatten!
  expect :end
  expect :record
  ret
end

#parse_record_items ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 370

def parse_record_items
  ret=[]
  ret << ri=RecordItem.new
  # in microwatt => name of the item can be 'error' !
  # we simply accept the first token as name !
  ri.name=Ident.new(acceptIt)
  while showNext.is_a?(:comma)
    acceptIt
    ret << ri=RecordItem.new
    ri.name=Ident.new(expect :ident)
  end
  expect :colon
  type=parse_type
  ret.each{|ri| ri.type=type}
  expect :semicolon
  ret
end

#parse_report ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1131

def parse_report
  ret=Report.new
  expect :report
  ret.expr=parse_expression
  if showNext.is_a?(:severity)
    ret.severity=parse_severity
  end
  expect :semicolon
  return ret
end

#parse_return ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1142

def parse_return
  ret=Return.new
  expect :return
  unless showNext.is_a?(:semicolon)
    ret.expr=parse_expression
  end
  expect :semicolon
  return ret
end

#parse_select ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 774

def parse_select
  ret=WithSelect.new
  expect :with
  ret.with_expr=parse_expression
  expect :select
  ret.assigned=parse_term
  expect :leq
  ret.selected_whens << parse_selected_when
  while showNext.is_a?(:comma)
    acceptIt
    ret.selected_whens << parse_selected_when
  end
  expect :semicolon
  ret
end

#parse_selected_when ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 790

def parse_selected_when
  ret=SelectedWhen.new
  ret.lhs=parse_expression
  expect :when
  ret.rhs=parse_expression
  ret
end

#parse_sensitivity_list ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 683

def parse_sensitivity_list
  ret=Sensitivity.new
  expect :lparen
  case showNext.kind
  when :ident
    ret << Ident.new(acceptIt)
    while showNext.is_a?(:comma)
      acceptIt
      ret << Ident.new(expect :ident)
    end
  when :all # VHDL'08 for Microwatt !
    ret << acceptIt
  end
  expect :rparen
  ret
end

#parse_seq_stmt ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 941

def parse_seq_stmt
  #puts "parse_seq_stmt line #{showNext.pos.first}"
  label=parse_label?
  case showNext.kind
  when :null
    ret=parse_null_stmt
  when :if
    ret=parse_if_stmt
  when :for
    ret=parse_for
  when :while
    ret=parse_while
  when :case
    ret=parse_case
  when :wait
    ret=parse_wait
  when :report
    ret=parse_report
  when :return
    ret=parse_return
  when :assert
    ret=parse_assert
  when :loop
    ret=parse_loop
  when :exit
    ret=parse_exit
  when :ident
    ret=parse_assign
  else
    raise "ERROR : parse_seq_stmt : #{pp showNext}"
  end
  ret
end

#parse_severity ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1166

def parse_severity
  if showNext.is_a?(:severity)
    ret=Severity.new
    acceptIt
    if showNext.is_a? severity=[:warning,:note,:error,:failure]
      ret.type=acceptIt
    else
      raise "ERROR : expecting one of #{severity.join(',')}. Got : #{showNext.val}[#{showNext.kind}]"
    end
  end
end

#parse_signal ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 424

def parse_signal
  ret=[]
  expect :signal
  ret << sig=Signal.new
  sig.name=Ident.new(expect :ident)
  while showNext.is_a?(:comma)
    acceptIt
    ret << sig=Signal.new
    sig.name=Ident.new(expect :ident)
  end
  expect :colon
  type=parse_type
  ret.map{|sig| sig.type=type}
  init=initialized?
  ret.last.init=init
  expect :semicolon
  ret
end

#parse_term ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1261

def parse_term
  #pp showNext
  if showNext.is_a? [:ident,:dot,:integer,:natural,:positive,:decimal_literal,:based_literal,:char_literal,:string_literal,:true,:false,:bit_string_literal,:lparen,:others,:abs,:not,:sub,:open]
    case showNext.kind
    when :ident
      ret=Ident.new(acceptIt)
    when :lparen
      ret=parse_parenth
    when :not,:abs,:sub
      ret=parse_unary
    when :decimal_literal
      ret=IntLit.new(acceptIt)
    when :char_literal
      ret=CharLit.new(acceptIt)
    when :string_literal,:bit_string_literal,:based_literal
      ret=acceptIt
    when :true,:false
      ret=BoolLit.new(acceptIt)
    when :others
      ret=acceptIt
    when :open
      ret=acceptIt
    when :integer,:natural,:positive
      ret=acceptIt
    else
      puts "cannot parse term : #{showNext} #{showNext.pos}"
    end
  end
  #pp showNext
  while showNext && showNext.is_a?([:lbrack,:dot,:attribute_literal,:lparen,:ns,:ps,:ms,:after,:ampersand,:tick])
    if par=sliced=parenthesized?
      case par
      when FuncCall
        par.name=ret
        ret=par
      when Sliced
        sliced.expr=ret
        ret=sliced
      end
    elsif selected_name=selected_name?
      selected_name.lhs=ret
      ret=selected_name
    elsif attribute=attributed?
      attribute.lhs=ret
      ret=attribute
    elsif timed=timed?
      timed.lhs=ret
      ret=timed
    elsif after=after?
      after.lhs=ret
      ret=after
    elsif concat=concat?
      concat.lhs=ret
      ret=concat
    elsif qualified=qualified?
      qualified.lhs=ret
      ret=qualified
    end
  end
  ret
end

#parse_type ⇒ Object

do accept

signal a_outputs : A_lib.A_pkg.outputs_t;



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# File 'lib/vertigo/parser.rb', line 201

def parse_type
  case showNext.kind
  when :ident
    type=NamedType.new
    type.ident=Ident.new(acceptIt)
    while selected_name=selected_name?
      selected_name.lhs=type.ident
      type.ident=selected_name
    end
  else
    type=StdType.new
    type.ident=Ident.new(acceptIt) # natural,...
    if ranged_type=ranged_type?
      ranged_type.type=type
      type=ranged_type
    end
  end
  if showNext.is_a? :lparen
    old=type
    type=ArrayType.new
    type.name=old
    acceptIt
    type.discrete_ranges << parse_discrete_range
    while showNext.is_a?(:comma) # multidim array types
      acceptIt
      type.discrete_ranges << parse_discrete_range
    end
    expect :rparen
  end
  type
end

#parse_typedecl ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 317

def parse_typedecl
  ret=TypeDecl.new
  case showNext.kind
  when :type
    acceptIt
  when :subtype
    acceptIt
    ret=SubTypeDecl.new
  else
    raise "ERROR : expecting 'type' or 'subtype'"
  end
  ret.name=Ident.new(expect :ident)
  expect :is
  case showNext.kind
  when :lparen
    ret.spec=parse_enum
  when :record
    ret.spec=parse_record
  when :array
    ret.spec=parse_array_decl
  when :integer,:natural,:positive,:ident
    ret.spec=parse_type
  else
    raise "parse_typedecl : #{pp showNext}"
  end
  expect :semicolon
  ret
end

#parse_unary ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1409

def parse_unary
  if showNext.is_a?([:not,:sub,:abs])
    acceptIt
    parse_expression
  end
end

#parse_use ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 94

def parse_use
  ret=Use.new
  expect :use
  selected_name=parse_term #ENSURE  selected_name
  unless selected_name.is_a?(SelectedName)
    raise "expecting selected name afer 'use'"
  end
  ret.library=selected_name.lhs.lhs
  ret.package=selected_name.lhs.rhs
  ret.element=selected_name.rhs
  expect :semicolon
  ret
end

#parse_variable ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 579

def parse_variable
  ret=[] << var=Variable.new
  expect :variable
  var.name=Ident.new(expect :ident)
  while showNext.is_a?(:comma)
    acceptIt
    ret << var=Variable.new
    var.name=Ident.new(expect :ident)
  end
  expect :colon
  type=parse_type
  ret.each{|var| var.type=type}
  init=initialized?
  ret.last.init=init
  expect :semicolon
  ret
end

#parse_wait ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1113

def parse_wait
  ret=Wait.new
  expect :wait
  case showNext.kind
  when :until
    acceptIt
    ret.until_=parse_expression
  when :for
    acceptIt
    ret.for_=parse_expression
  when :semicolon
  else
    raise "parse_wait : #{pp showNext}"
  end
  expect :semicolon
  ret
end

#parse_when_case ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1095

def parse_when_case
  ret=CaseWhen.new
  expect :when
  ret.expr=expr=parse_expression
  if showNext.is_a?(:bar)
    alternative=Alternative.new
    alternative << ret.expr
    ret.expr=alternative
    while showNext.is_a?(:bar)
      acceptIt
      alternative << parse_expression
    end
  end
  expect :imply
  ret.body=parse_body
  ret
end

#parse_while ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1075

def parse_while
  expect :while
  parse_expression
  parse_loop
end

#print_tokens(n) ⇒ Object 



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# File 'lib/vertigo/parser.rb', line 1323

def print_tokens n
  require "colorize"
  pp @tokens[0..n-1].map{|tok| tok.val}.join("   ")
end

#qualified? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1483

def qualified?
  if showNext.is_a?(:tick)
    acceptIt
    ret=Qualified.new
    ret.rhs=parse_expression
    return ret
  end
end

#ranged_type? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 233

def ranged_type?
  if showNext.is_a?(:range)
    acceptIt
    ret=RangedType.new
    ret.range=parse_discrete_range
    return ret
  end
end

#selected_name? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1391

def selected_name?
  while showNext.is_a? [:dot]
    ret=SelectedName.new
    acceptIt
    if showNext.is_a? [:ident,:all]
      case showNext.kind
      when :ident
        ret.rhs=Ident.new(acceptIt)
      when :all
        ret.rhs=acceptIt #all
      end
      return ret
    else
      raise "ERROR : expecting ident or 'all' at #{showNext.pos}"
    end
  end
end

#timed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vertigo/parser.rb', line 1416

def timed?
  if showNext.is_a? [:ps,:ns,:ms]
    tok=acceptIt
    ret=Timed.new(nil,tok)
  end
end