Module: GraphQL::Language::Lexer

Defined in:
lib/graphql/language/lexer.rb

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

._graphql_lexer_actions ⇒ Object

Returns the value of attribute _graphql_lexer_actions.



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# File 'lib/graphql/language/lexer.rb', line 28

def _graphql_lexer_actions
  @_graphql_lexer_actions
end

._graphql_lexer_eof_trans ⇒ Object

Returns the value of attribute _graphql_lexer_eof_trans.



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# File 'lib/graphql/language/lexer.rb', line 273

def _graphql_lexer_eof_trans
  @_graphql_lexer_eof_trans
end

._graphql_lexer_from_state_actions ⇒ Object

Returns the value of attribute _graphql_lexer_from_state_actions.



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# File 'lib/graphql/language/lexer.rb', line 259

def _graphql_lexer_from_state_actions
  @_graphql_lexer_from_state_actions
end

._graphql_lexer_index_offsets ⇒ Object

Returns the value of attribute _graphql_lexer_index_offsets.



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# File 'lib/graphql/language/lexer.rb', line 147

def _graphql_lexer_index_offsets
  @_graphql_lexer_index_offsets
end

._graphql_lexer_indicies ⇒ Object

Returns the value of attribute _graphql_lexer_indicies.



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# File 'lib/graphql/language/lexer.rb', line 161

def _graphql_lexer_indicies
  @_graphql_lexer_indicies
end

._graphql_lexer_key_offsets ⇒ Object

Returns the value of attribute _graphql_lexer_key_offsets.



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# File 'lib/graphql/language/lexer.rb', line 47

def _graphql_lexer_key_offsets
  @_graphql_lexer_key_offsets
end

._graphql_lexer_range_lengths ⇒ Object

Returns the value of attribute _graphql_lexer_range_lengths.



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# File 'lib/graphql/language/lexer.rb', line 133

def _graphql_lexer_range_lengths
  @_graphql_lexer_range_lengths
end

._graphql_lexer_single_lengths ⇒ Object

Returns the value of attribute _graphql_lexer_single_lengths.



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# File 'lib/graphql/language/lexer.rb', line 119

def _graphql_lexer_single_lengths
  @_graphql_lexer_single_lengths
end

._graphql_lexer_to_state_actions ⇒ Object

Returns the value of attribute _graphql_lexer_to_state_actions.



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# File 'lib/graphql/language/lexer.rb', line 245

def _graphql_lexer_to_state_actions
  @_graphql_lexer_to_state_actions
end

._graphql_lexer_trans_actions ⇒ Object

Returns the value of attribute _graphql_lexer_trans_actions.



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# File 'lib/graphql/language/lexer.rb', line 227

def _graphql_lexer_trans_actions
  @_graphql_lexer_trans_actions
end

._graphql_lexer_trans_keys ⇒ Object

Returns the value of attribute _graphql_lexer_trans_keys.



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# File 'lib/graphql/language/lexer.rb', line 61

def _graphql_lexer_trans_keys
  @_graphql_lexer_trans_keys
end

._graphql_lexer_trans_targs ⇒ Object

Returns the value of attribute _graphql_lexer_trans_targs.



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# File 'lib/graphql/language/lexer.rb', line 209

def _graphql_lexer_trans_targs
  @_graphql_lexer_trans_targs
end

.graphql_lexer_en_main ⇒ Object

Returns the value of attribute graphql_lexer_en_main.



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# File 'lib/graphql/language/lexer.rb', line 300

def graphql_lexer_en_main
  @graphql_lexer_en_main
end

.graphql_lexer_error ⇒ Object

Returns the value of attribute graphql_lexer_error.



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# File 'lib/graphql/language/lexer.rb', line 295

def graphql_lexer_error
  @graphql_lexer_error
end

.graphql_lexer_first_final ⇒ Object

Returns the value of attribute graphql_lexer_first_final.



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# File 'lib/graphql/language/lexer.rb', line 291

def graphql_lexer_first_final
  @graphql_lexer_first_final
end

.graphql_lexer_start ⇒ Object

Returns the value of attribute graphql_lexer_start.



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# File 'lib/graphql/language/lexer.rb', line 287

def graphql_lexer_start
  @graphql_lexer_start
end

Class Method Details

.emit(token_name, ts, te, meta) ⇒ Object 



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# File 'lib/graphql/language/lexer.rb', line 728

def self.emit(token_name, ts, te, meta)
  meta[:tokens] << GraphQL::Language::Token.new(
    name: token_name,
    value: meta[:data][ts...te].pack("c*"),
    line: meta[:line],
    col: meta[:col],
  )
  # Bump the column counter for the next token
  meta[:col] += te - ts
end

.emit_string(ts, te, meta) ⇒ Object 



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# File 'lib/graphql/language/lexer.rb', line 754

def self.emit_string(ts, te, meta)
  value = meta[:data][ts...te].pack("c*").force_encoding("UTF-8")
  if value =~ /\\u|\\./ && value !~ ESCAPES
    meta[:tokens] << GraphQL::Language::Token.new(
      name: :BAD_UNICODE_ESCAPE,
      value: value,
      line: meta[:line],
      col: meta[:col],
    )
  else
    replace_escaped_characters_in_place(value)

    meta[:tokens] << GraphQL::Language::Token.new(
      name: :STRING,
      value: value,
      line: meta[:line],
      col: meta[:col],
    )
  end

  meta[:col] += te - ts
end

.replace_escaped_characters_in_place(raw_string) ⇒ Object

Replace any escaped unicode or whitespace with the actual characters To avoid allocating more strings, this modifies the string passed into it



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# File 'lib/graphql/language/lexer.rb', line 17

def self.replace_escaped_characters_in_place(raw_string)
  raw_string.gsub!(ESCAPES, ESCAPES_REPLACE)
  raw_string.gsub!(UTF_8, &UTF_8_REPLACE)
  nil
end

.run_lexer(query_string) ⇒ Object

line 99 “lib/graphql/language/lexer.rl”



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# File 'lib/graphql/language/lexer.rb', line 307

def self.run_lexer(query_string)
  data = query_string.unpack("c*")
  eof = data.length

  meta = {
    line: 1,
    col: 1,
    data: data,
    tokens: []
  }

  
# line 320 "lib/graphql/language/lexer.rb"
begin
  p ||= 0
  pe ||= data.length
  cs = graphql_lexer_start
  ts = nil
  te = nil
  act = 0
end

# line 112 "lib/graphql/language/lexer.rl"

  emit_token = -> (name) {
    emit(name, ts, te, meta)
  }

  
# line 337 "lib/graphql/language/lexer.rb"
begin
  _klen, _trans, _keys, _acts, _nacts = nil
  _goto_level = 0
  _resume = 10
  _eof_trans = 15
  _again = 20
  _test_eof = 30
  _out = 40
  while true
  _trigger_goto = false
  if _goto_level <= 0
  if p == pe
    _goto_level = _test_eof
    next
  end
  end
  if _goto_level <= _resume
  _acts = _graphql_lexer_from_state_actions[cs]
  _nacts = _graphql_lexer_actions[_acts]
  _acts += 1
  while _nacts > 0
    _nacts -= 1
    _acts += 1
    case _graphql_lexer_actions[_acts - 1]
      when 1 then
# line 1 "NONE"
    begin
ts = p
    end
# line 367 "lib/graphql/language/lexer.rb"
    end # from state action switch
  end
  if _trigger_goto
    next
  end
  _keys = _graphql_lexer_key_offsets[cs]
  _trans = _graphql_lexer_index_offsets[cs]
  _klen = _graphql_lexer_single_lengths[cs]
  _break_match = false
  
  begin
    if _klen > 0
_lower = _keys
_upper = _keys + _klen - 1

loop do
   break if _upper < _lower
   _mid = _lower + ( (_upper - _lower) >> 1 )

   if data[p].ord < _graphql_lexer_trans_keys[_mid]
      _upper = _mid - 1
   elsif data[p].ord > _graphql_lexer_trans_keys[_mid]
      _lower = _mid + 1
   else
      _trans += (_mid - _keys)
      _break_match = true
      break
   end
end # loop
break if _break_match
_keys += _klen
_trans += _klen
    end
    _klen = _graphql_lexer_range_lengths[cs]
    if _klen > 0
_lower = _keys
_upper = _keys + (_klen << 1) - 2
loop do
   break if _upper < _lower
   _mid = _lower + (((_upper-_lower) >> 1) & ~1)
   if data[p].ord < _graphql_lexer_trans_keys[_mid]
     _upper = _mid - 2
   elsif data[p].ord > _graphql_lexer_trans_keys[_mid+1]
     _lower = _mid + 2
   else
     _trans += ((_mid - _keys) >> 1)
     _break_match = true
     break
   end
end # loop
break if _break_match
_trans += _klen
    end
  end while false
  _trans = _graphql_lexer_indicies[_trans]
  end
  if _goto_level <= _eof_trans
  cs = _graphql_lexer_trans_targs[_trans]
  if _graphql_lexer_trans_actions[_trans] != 0
    _acts = _graphql_lexer_trans_actions[_trans]
    _nacts = _graphql_lexer_actions[_acts]
    _acts += 1
    while _nacts > 0
      _nacts -= 1
      _acts += 1
      case _graphql_lexer_actions[_acts - 1]
when 2 then
# line 1 "NONE"
    begin
te = p+1
    end
when 3 then
# line 42 "lib/graphql/language/lexer.rl"
    begin
act = 1;    end
when 4 then
# line 43 "lib/graphql/language/lexer.rl"
    begin
act = 2;    end
when 5 then
# line 44 "lib/graphql/language/lexer.rl"
    begin
act = 3;    end
when 6 then
# line 45 "lib/graphql/language/lexer.rl"
    begin
act = 4;    end
when 7 then
# line 46 "lib/graphql/language/lexer.rl"
    begin
act = 5;    end
when 8 then
# line 47 "lib/graphql/language/lexer.rl"
    begin
act = 6;    end
when 9 then
# line 48 "lib/graphql/language/lexer.rl"
    begin
act = 7;    end
when 10 then
# line 49 "lib/graphql/language/lexer.rl"
    begin
act = 8;    end
when 11 then
# line 50 "lib/graphql/language/lexer.rl"
    begin
act = 9;    end
when 12 then
# line 51 "lib/graphql/language/lexer.rl"
    begin
act = 10;   end
when 13 then
# line 59 "lib/graphql/language/lexer.rl"
    begin
act = 18;   end
when 14 then
# line 65 "lib/graphql/language/lexer.rl"
    begin
act = 24;   end
when 15 then
# line 75 "lib/graphql/language/lexer.rl"
    begin
act = 28;   end
when 16 then
# line 52 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:RCURLY)  end
    end
when 17 then
# line 53 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:LCURLY)  end
    end
when 18 then
# line 54 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:RPAREN)  end
    end
when 19 then
# line 55 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:LPAREN)  end
    end
when 20 then
# line 56 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:RBRACKET)  end
    end
when 21 then
# line 57 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:LBRACKET)  end
    end
when 22 then
# line 58 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:COLON)  end
    end
when 23 then
# line 59 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_string(ts + 1, te - 1, meta)  end
    end
when 24 then
# line 60 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:VAR_SIGN)  end
    end
when 25 then
# line 61 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:DIR_SIGN)  end
    end
when 26 then
# line 62 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:ELLIPSIS)  end
    end
when 27 then
# line 63 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:EQUALS)  end
    end
when 28 then
# line 64 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:BANG)  end
    end
when 29 then
# line 67 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin 
meta[:line] += 1
meta[:col] = 1
     end
    end
when 30 then
# line 75 "lib/graphql/language/lexer.rl"
    begin
te = p+1
 begin  emit_token.call(:UNKNOWN_CHAR)  end
    end
when 31 then
# line 42 "lib/graphql/language/lexer.rl"
    begin
te = p
p = p - 1; begin  emit_token.call(:INT)  end
    end
when 32 then
# line 43 "lib/graphql/language/lexer.rl"
    begin
te = p
p = p - 1; begin  emit_token.call(:FLOAT)  end
    end
when 33 then
# line 65 "lib/graphql/language/lexer.rl"
    begin
te = p
p = p - 1; begin  emit_token.call(:IDENTIFIER)  end
    end
when 34 then
# line 72 "lib/graphql/language/lexer.rl"
    begin
te = p
p = p - 1; begin  meta[:col] += te - ts  end
    end
when 35 then
# line 73 "lib/graphql/language/lexer.rl"
    begin
te = p
p = p - 1; begin  meta[:col] += te - ts  end
    end
when 36 then
# line 75 "lib/graphql/language/lexer.rl"
    begin
te = p
p = p - 1; begin  emit_token.call(:UNKNOWN_CHAR)  end
    end
when 37 then
# line 42 "lib/graphql/language/lexer.rl"
    begin
 begin p = ((te))-1; end
 begin  emit_token.call(:INT)  end
    end
when 38 then
# line 75 "lib/graphql/language/lexer.rl"
    begin
 begin p = ((te))-1; end
 begin  emit_token.call(:UNKNOWN_CHAR)  end
    end
when 39 then
# line 1 "NONE"
    begin
  case act
  when 1 then
  begin begin p = ((te))-1; end
 emit_token.call(:INT) end
  when 2 then
  begin begin p = ((te))-1; end
 emit_token.call(:FLOAT) end
  when 3 then
  begin begin p = ((te))-1; end
 emit_token.call(:ON) end
  when 4 then
  begin begin p = ((te))-1; end
 emit_token.call(:FRAGMENT) end
  when 5 then
  begin begin p = ((te))-1; end
 emit_token.call(:TRUE) end
  when 6 then
  begin begin p = ((te))-1; end
 emit_token.call(:FALSE) end
  when 7 then
  begin begin p = ((te))-1; end
 emit_token.call(:NULL) end
  when 8 then
  begin begin p = ((te))-1; end
 emit_token.call(:QUERY) end
  when 9 then
  begin begin p = ((te))-1; end
 emit_token.call(:MUTATION) end
  when 10 then
  begin begin p = ((te))-1; end
 emit_token.call(:SUBSCRIPTION) end
  when 18 then
  begin begin p = ((te))-1; end
 emit_string(ts + 1, te - 1, meta) end
  when 24 then
  begin begin p = ((te))-1; end
 emit_token.call(:IDENTIFIER) end
  when 28 then
  begin begin p = ((te))-1; end
 emit_token.call(:UNKNOWN_CHAR) end
end 
      end
# line 677 "lib/graphql/language/lexer.rb"
      end # action switch
    end
  end
  if _trigger_goto
    next
  end
  end
  if _goto_level <= _again
  _acts = _graphql_lexer_to_state_actions[cs]
  _nacts = _graphql_lexer_actions[_acts]
  _acts += 1
  while _nacts > 0
    _nacts -= 1
    _acts += 1
    case _graphql_lexer_actions[_acts - 1]
when 0 then
# line 1 "NONE"
    begin
ts = nil;   end
# line 697 "lib/graphql/language/lexer.rb"
    end # to state action switch
  end
  if _trigger_goto
    next
  end
  p += 1
  if p != pe
    _goto_level = _resume
    next
  end
  end
  if _goto_level <= _test_eof
  if p == eof
  if _graphql_lexer_eof_trans[cs] > 0
    _trans = _graphql_lexer_eof_trans[cs] - 1;
    _goto_level = _eof_trans
    next;
  end
end
  end
  if _goto_level <= _out
    break
  end
  end
  end

# line 118 "lib/graphql/language/lexer.rl"

  meta[:tokens]
end

.tokenize(query_string) ⇒ Object 



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# File 'lib/graphql/language/lexer.rb', line 11

def self.tokenize(query_string)
  run_lexer(query_string)
end