| Current File : //opt/alt/ruby19/lib64/ruby/1.9.1/rdoc/parser/ruby.rb |
##
# This file contains stuff stolen outright from:
#
# rtags.rb -
# ruby-lex.rb - ruby lexcal analyzer
# ruby-token.rb - ruby tokens
# by Keiju ISHITSUKA (Nippon Rational Inc.)
#
require 'rdoc/ruby_token'
require 'rdoc/ruby_lex'
require 'rdoc/code_objects'
require 'rdoc/token_stream'
require 'rdoc/markup/pre_process'
require 'rdoc/parser'
require 'rdoc/parser/ruby_tools'
$TOKEN_DEBUG ||= nil
##
# Extracts code elements from a source file returning a TopLevel object
# containing the constituent file elements.
#
# This file is based on rtags
#
# RubyParser understands how to document:
# * classes
# * modules
# * methods
# * constants
# * aliases
# * private, public, protected
# * private_class_function, public_class_function
# * module_function
# * attr, attr_reader, attr_writer, attr_accessor
# * extra accessors given on the command line
# * metaprogrammed methods
# * require
# * include
#
# == Method Arguments
#
#--
# NOTE: I don't think this works, needs tests, remove the paragraph following
# this block when known to work
#
# The parser extracts the arguments from the method definition. You can
# override this with a custom argument definition using the :args: directive:
#
# ##
# # This method tries over and over until it is tired
#
# def go_go_go(thing_to_try, tries = 10) # :args: thing_to_try
# puts thing_to_try
# go_go_go thing_to_try, tries - 1
# end
#
# If you have a more-complex set of overrides you can use the :call-seq:
# directive:
#++
#
# The parser extracts the arguments from the method definition. You can
# override this with a custom argument definition using the :call-seq:
# directive:
#
# ##
# # This method can be called with a range or an offset and length
# #
# # :call-seq:
# # my_method(Range)
# # my_method(offset, length)
#
# def my_method(*args)
# end
#
# The parser extracts +yield+ expressions from method bodies to gather the
# yielded argument names. If your method manually calls a block instead of
# yielding or you want to override the discovered argument names use
# the :yields: directive:
#
# ##
# # My method is awesome
#
# def my_method(&block) # :yields: happy, times
# block.call 1, 2
# end
#
# == Metaprogrammed Methods
#
# To pick up a metaprogrammed method, the parser looks for a comment starting
# with '##' before an identifier:
#
# ##
# # This is a meta-programmed method!
#
# add_my_method :meta_method, :arg1, :arg2
#
# The parser looks at the token after the identifier to determine the name, in
# this example, :meta_method. If a name cannot be found, a warning is printed
# and 'unknown is used.
#
# You can force the name of a method using the :method: directive:
#
# ##
# # :method: woo_hoo!
#
# By default, meta-methods are instance methods. To indicate that a method is
# a singleton method instead use the :singleton-method: directive:
#
# ##
# # :singleton-method:
#
# You can also use the :singleton-method: directive with a name:
#
# ##
# # :singleton-method: woo_hoo!
#
# Additionally you can mark a method as an attribute by
# using :attr:, :attr_reader:, :attr_writer: or :attr_accessor:. Just like
# for :method:, the name is optional.
#
# ##
# # :attr_reader: my_attr_name
#
# == Hidden methods and attributes
#
# You can provide documentation for methods that don't appear using
# the :method:, :singleton-method: and :attr: directives:
#
# ##
# # :attr_writer: ghost_writer
# # There is an attribute here, but you can't see it!
#
# ##
# # :method: ghost_method
# # There is a method here, but you can't see it!
#
# ##
# # this is a comment for a regular method
#
# def regular_method() end
#
# Note that by default, the :method: directive will be ignored if there is a
# standard rdocable item following it.
class RDoc::Parser::Ruby < RDoc::Parser
parse_files_matching(/\.rbw?$/)
include RDoc::RubyToken
include RDoc::TokenStream
include RDoc::Parser::RubyTools
##
# RDoc::NormalClass type
NORMAL = "::"
##
# RDoc::SingleClass type
SINGLE = "<<"
##
# Creates a new Ruby parser.
def initialize(top_level, file_name, content, options, stats)
super
@size = 0
@token_listeners = nil
@scanner = RDoc::RubyLex.new content, @options
@scanner.exception_on_syntax_error = false
@prev_seek = nil
@encoding = nil
@encoding = @options.encoding if Object.const_defined? :Encoding
reset
end
##
# Look for the first comment in a file that isn't a shebang line.
def collect_first_comment
skip_tkspace
comment = ''
comment.force_encoding @encoding if @encoding
first_line = true
tk = get_tk
while TkCOMMENT === tk
if first_line and tk.text =~ /\A#!/ then
skip_tkspace
tk = get_tk
elsif first_line and tk.text =~ /\A#\s*-\*-/ then
first_line = false
skip_tkspace
tk = get_tk
else
first_line = false
comment << tk.text << "\n"
tk = get_tk
if TkNL === tk then
skip_tkspace false
tk = get_tk
end
end
end
unget_tk tk
comment
end
##
# Aborts with +msg+
def error(msg)
msg = make_message msg
abort msg
end
##
# Look for a 'call-seq' in the comment, and override the normal parameter
# stuff
#--
# TODO handle undent
def extract_call_seq(comment, meth)
if comment.sub!(/:?call-seq:(.*?)(^\s*#?\s*$|\z)/m, '') then
seq = $1
seq.gsub!(/^\s*\#\s*/, '')
meth.call_seq = seq
end
meth
end
##
# Looks for a true or false token. Returns false if TkFALSE or TkNIL are
# found.
def get_bool
skip_tkspace
tk = get_tk
case tk
when TkTRUE
true
when TkFALSE, TkNIL
false
else
unget_tk tk
true
end
end
##
# Look for the name of a class of module (optionally with a leading :: or
# with :: separated named) and return the ultimate name, the associated
# container, and the given name (with the ::).
def get_class_or_module(container)
skip_tkspace
name_t = get_tk
given_name = ''
# class ::A -> A is in the top level
case name_t
when TkCOLON2, TkCOLON3 then # bug
name_t = get_tk
container = @top_level
given_name << '::'
end
skip_tkspace false
given_name << name_t.name
while TkCOLON2 === peek_tk do
prev_container = container
container = container.find_module_named name_t.name
unless container then
container = prev_container.add_module RDoc::NormalModule, name_t.name
end
get_tk
name_t = get_tk
given_name << '::' << name_t.name
end
skip_tkspace false
return [container, name_t, given_name]
end
##
# Return a superclass, which can be either a constant of an expression
def get_class_specification
tk = get_tk
return "self" if TkSELF === tk
res = ""
while TkCOLON2 === tk or TkCOLON3 === tk or TkCONSTANT === tk do
res += tk.name
tk = get_tk
end
unget_tk(tk)
skip_tkspace false
get_tkread # empty out read buffer
tk = get_tk
case tk
when TkNL, TkCOMMENT, TkSEMICOLON then
unget_tk(tk)
return res
end
res += parse_call_parameters(tk)
res
end
##
# Parse a constant, which might be qualified by one or more class or module
# names
def get_constant
res = ""
skip_tkspace false
tk = get_tk
while TkCOLON2 === tk or TkCOLON3 === tk or TkCONSTANT === tk do
res += tk.name
tk = get_tk
end
# if res.empty?
# warn("Unexpected token #{tk} in constant")
# end
unget_tk(tk)
res
end
##
# Get a constant that may be surrounded by parens
def get_constant_with_optional_parens
skip_tkspace false
nest = 0
while TkLPAREN === (tk = peek_tk) or TkfLPAREN === tk do
get_tk
skip_tkspace
nest += 1
end
name = get_constant
while nest > 0
skip_tkspace
tk = get_tk
nest -= 1 if TkRPAREN === tk
end
name
end
##
# Extracts a name or symbol from the token stream.
def get_symbol_or_name
tk = get_tk
case tk
when TkSYMBOL then
text = tk.text.sub(/^:/, '')
if TkASSIGN === peek_tk then
get_tk
text << '='
end
text
when TkId, TkOp then
tk.name
when TkAMPER,
TkDSTRING,
TkSTAR,
TkSTRING then
tk.text
else
raise RDoc::Error, "Name or symbol expected (got #{tk})"
end
end
##
# Look for directives in a normal comment block:
#
# # :stopdoc:
# # Don't display comment from this point forward
#
# This routine modifies its +comment+ parameter.
def look_for_directives_in context, comment
@preprocess.handle comment, context do |directive, param|
case directive
when 'method', 'singleton-method',
'attr', 'attr_accessor', 'attr_reader', 'attr_writer' then
false # handled elsewhere
when 'section' then
context.set_current_section param, comment
comment.replace ''
break
end
end
remove_private_comments comment
end
##
# Adds useful info about the parser to +message+
def make_message message
prefix = "#{@file_name}:"
prefix << "#{@scanner.line_no}:#{@scanner.char_no}:" if @scanner
"#{prefix} #{message}"
end
##
# Creates an RDoc::Attr for the name following +tk+, setting the comment to
# +comment+.
def parse_attr(context, single, tk, comment)
offset = tk.seek
line_no = tk.line_no
args = parse_symbol_arg 1
if args.size > 0 then
name = args[0]
rw = "R"
skip_tkspace false
tk = get_tk
if TkCOMMA === tk then
rw = "RW" if get_bool
else
unget_tk tk
end
att = RDoc::Attr.new get_tkread, name, rw, comment, single == SINGLE
att.record_location @top_level
att.offset = offset
att.line = line_no
read_documentation_modifiers att, RDoc::ATTR_MODIFIERS
context.add_attribute att
@stats.add_attribute att
else
warn "'attr' ignored - looks like a variable"
end
end
##
# Creates an RDoc::Attr for each attribute listed after +tk+, setting the
# comment for each to +comment+.
def parse_attr_accessor(context, single, tk, comment)
offset = tk.seek
line_no = tk.line_no
args = parse_symbol_arg
rw = "?"
tmp = RDoc::CodeObject.new
read_documentation_modifiers tmp, RDoc::ATTR_MODIFIERS
# TODO In most other places we let the context keep track of document_self
# and add found items appropriately but here we do not. I'm not sure why.
return unless tmp.document_self
case tk.name
when "attr_reader" then rw = "R"
when "attr_writer" then rw = "W"
when "attr_accessor" then rw = "RW"
else
rw = '?'
end
for name in args
att = RDoc::Attr.new get_tkread, name, rw, comment, single == SINGLE
att.record_location @top_level
att.offset = offset
att.line = line_no
context.add_attribute att
@stats.add_attribute att
end
end
##
# Parses an +alias+ in +context+ with +comment+
def parse_alias(context, single, tk, comment)
offset = tk.seek
line_no = tk.line_no
skip_tkspace
if TkLPAREN === peek_tk then
get_tk
skip_tkspace
end
new_name = get_symbol_or_name
@scanner.instance_eval { @lex_state = EXPR_FNAME }
skip_tkspace
if TkCOMMA === peek_tk then
get_tk
skip_tkspace
end
begin
old_name = get_symbol_or_name
rescue RDoc::Error
return
end
al = RDoc::Alias.new(get_tkread, old_name, new_name, comment,
single == SINGLE)
al.record_location @top_level
al.offset = offset
al.line = line_no
read_documentation_modifiers al, RDoc::ATTR_MODIFIERS
context.add_alias al
@stats.add_alias al
al
end
##
# Extracts call parameters from the token stream.
def parse_call_parameters(tk)
end_token = case tk
when TkLPAREN, TkfLPAREN
TkRPAREN
when TkRPAREN
return ""
else
TkNL
end
nest = 0
loop do
case tk
when TkSEMICOLON
break
when TkLPAREN, TkfLPAREN
nest += 1
when end_token
if end_token == TkRPAREN
nest -= 1
break if @scanner.lex_state == EXPR_END and nest <= 0
else
break unless @scanner.continue
end
when TkCOMMENT, TkASSIGN, TkOPASGN
unget_tk(tk)
break
when nil then
break
end
tk = get_tk
end
res = get_tkread.tr("\n", " ").strip
res = "" if res == ";"
res
end
##
# Parses a class in +context+ with +comment+
def parse_class(container, single, tk, comment)
offset = tk.seek
line_no = tk.line_no
declaration_context = container
container, name_t, given_name = get_class_or_module container
case name_t
when TkCONSTANT
name = name_t.name
superclass = '::Object'
if TkLT === peek_tk then
get_tk
skip_tkspace
superclass = get_class_specification
superclass = '(unknown)' if superclass.empty?
end
cls_type = single == SINGLE ? RDoc::SingleClass : RDoc::NormalClass
cls = declaration_context.add_class cls_type, given_name, superclass
cls.ignore unless container.document_children
read_documentation_modifiers cls, RDoc::CLASS_MODIFIERS
cls.record_location @top_level
cls.offset = offset
cls.line = line_no
cls.add_comment comment, @top_level
@top_level.add_to_classes_or_modules cls
@stats.add_class cls
parse_statements cls
when TkLSHFT
case name = get_class_specification
when "self", container.name
parse_statements container, SINGLE
else
other = RDoc::TopLevel.find_class_named name
unless other then
other = container.add_module RDoc::NormalModule, name
other.record_location @top_level
other.offset = offset
other.line = line_no
other.add_comment comment, @top_level
end
# notify :nodoc: all if not a constant-named class/module
# (and remove any comment)
unless name =~ /\A(::)?[A-Z]/ then
other.document_self = nil
other.document_children = false
other.clear_comment
end
@top_level.add_to_classes_or_modules other
@stats.add_class other
read_documentation_modifiers other, RDoc::CLASS_MODIFIERS
parse_statements(other, SINGLE)
end
else
warn("Expected class name or '<<'. Got #{name_t.class}: #{name_t.text.inspect}")
end
end
##
# Parses a constant in +context+ with +comment+
def parse_constant container, tk, comment
offset = tk.seek
line_no = tk.line_no
name = tk.name
skip_tkspace false
return unless name =~ /^\w+$/
eq_tk = get_tk
unless TkASSIGN === eq_tk then
unget_tk eq_tk
return false
end
nest = 0
get_tkread
tk = get_tk
if TkGT === tk then
unget_tk tk
unget_tk eq_tk
return false
end
rhs_name = ''
loop do
case tk
when TkSEMICOLON then
break if nest <= 0
when TkLPAREN, TkfLPAREN, TkLBRACE, TkfLBRACE, TkLBRACK, TkfLBRACK,
TkDO, TkIF, TkUNLESS, TkCASE, TkDEF, TkBEGIN then
nest += 1
when TkRPAREN, TkRBRACE, TkRBRACK, TkEND then
nest -= 1
when TkCOMMENT then
if nest <= 0 &&
(@scanner.lex_state == EXPR_END || !@scanner.continue) then
unget_tk tk
break
end
when TkCONSTANT then
rhs_name << tk.name
if nest <= 0 and TkNL === peek_tk then
mod = if rhs_name =~ /^::/ then
RDoc::TopLevel.find_class_or_module rhs_name
else
container.find_module_named rhs_name
end
container.add_module_alias mod, name, @top_level if mod
break
end
when TkNL then
if nest <= 0 &&
(@scanner.lex_state == EXPR_END || !@scanner.continue) then
unget_tk tk
break
end
when TkCOLON2, TkCOLON3 then
rhs_name << '::'
when nil then
break
end
tk = get_tk
end
res = get_tkread.gsub(/^[ \t]+/, '').strip
res = "" if res == ";"
con = RDoc::Constant.new name, res, comment
con.record_location @top_level
con.offset = offset
con.line = line_no
read_documentation_modifiers con, RDoc::CONSTANT_MODIFIERS
@stats.add_constant con
container.add_constant con
true
end
##
# Generates an RDoc::Method or RDoc::Attr from +comment+ by looking for
# :method: or :attr: directives in +comment+.
def parse_comment(container, tk, comment)
column = tk.char_no
offset = tk.seek
line_no = tk.line_no
singleton = !!comment.sub!(/(^# +:?)(singleton-)(method:)/, '\1\3')
# REFACTOR
if comment.sub!(/^# +:?method: *(\S*).*?\n/i, '') then
name = $1 unless $1.empty?
meth = RDoc::GhostMethod.new get_tkread, name
meth.record_location @top_level
meth.singleton = singleton
meth.offset = offset
meth.line = line_no
meth.start_collecting_tokens
indent = TkSPACE.new nil, 1, 1
indent.set_text " " * column
position_comment = TkCOMMENT.new nil, line_no, 1
position_comment.set_text "# File #{@top_level.absolute_name}, line #{line_no}"
meth.add_tokens [position_comment, NEWLINE_TOKEN, indent]
meth.params = ''
extract_call_seq comment, meth
return unless meth.name
container.add_method meth
meth.comment = comment
@stats.add_method meth
elsif comment.sub!(/# +:?(attr(_reader|_writer|_accessor)?): *(\S*).*?\n/i, '') then
rw = case $1
when 'attr_reader' then 'R'
when 'attr_writer' then 'W'
else 'RW'
end
name = $3 unless $3.empty?
# TODO authorize 'singleton-attr...'?
att = RDoc::Attr.new get_tkread, name, rw, comment
att.record_location @top_level
att.offset = offset
att.line = line_no
container.add_attribute att
@stats.add_attribute att
end
true
end
##
# Parses an +include+ in +context+ with +comment+
def parse_include context, comment
loop do
skip_tkspace_comment
name = get_constant_with_optional_parens
unless name.empty? then
incl = context.add_include RDoc::Include.new(name, comment)
incl.record_location @top_level
end
return unless TkCOMMA === peek_tk
get_tk
end
end
##
# Parses a meta-programmed attribute and creates an RDoc::Attr.
#
# To create foo and bar attributes on class C with comment "My attributes":
#
# class C
#
# ##
# # :attr:
# #
# # My attributes
#
# my_attr :foo, :bar
#
# end
#
# To create a foo attribute on class C with comment "My attribute":
#
# class C
#
# ##
# # :attr: foo
# #
# # My attribute
#
# my_attr :foo, :bar
#
# end
def parse_meta_attr(context, single, tk, comment)
args = parse_symbol_arg
rw = "?"
# If nodoc is given, don't document any of them
tmp = RDoc::CodeObject.new
read_documentation_modifiers tmp, RDoc::ATTR_MODIFIERS
if comment.sub!(/^# +:?(attr(_reader|_writer|_accessor)?): *(\S*).*?\n/i, '') then
rw = case $1
when 'attr_reader' then 'R'
when 'attr_writer' then 'W'
else 'RW'
end
name = $3 unless $3.empty?
end
if name then
att = RDoc::Attr.new get_tkread, name, rw, comment, single == SINGLE
att.record_location @top_level
context.add_attribute att
@stats.add_attribute att
else
args.each do |attr_name|
att = RDoc::Attr.new(get_tkread, attr_name, rw, comment,
single == SINGLE)
att.record_location @top_level
context.add_attribute att
@stats.add_attribute att
end
end
end
##
# Parses a meta-programmed method
def parse_meta_method(container, single, tk, comment)
column = tk.char_no
offset = tk.seek
line_no = tk.line_no
start_collecting_tokens
add_token tk
add_token_listener self
skip_tkspace false
singleton = !!comment.sub!(/(^# +:?)(singleton-)(method:)/, '\1\3')
if comment.sub!(/^# +:?method: *(\S*).*?\n/i, '') then
name = $1 unless $1.empty?
end
if name.nil? then
name_t = get_tk
case name_t
when TkSYMBOL then
name = name_t.text[1..-1]
when TkSTRING then
name = name_t.value[1..-2]
when TkASSIGN then # ignore
remove_token_listener self
return
else
warn "unknown name token #{name_t.inspect} for meta-method '#{tk.name}'"
name = 'unknown'
end
end
meth = RDoc::MetaMethod.new get_tkread, name
meth.record_location @top_level
meth.offset = offset
meth.line = line_no
meth.singleton = singleton
remove_token_listener self
meth.start_collecting_tokens
indent = TkSPACE.new nil, 1, 1
indent.set_text " " * column
position_comment = TkCOMMENT.new nil, line_no, 1
position_comment.value = "# File #{@top_level.absolute_name}, line #{line_no}"
meth.add_tokens [position_comment, NEWLINE_TOKEN, indent]
meth.add_tokens @token_stream
token_listener meth do
meth.params = ''
extract_call_seq comment, meth
container.add_method meth
last_tk = tk
while tk = get_tk do
case tk
when TkSEMICOLON then
break
when TkNL then
break unless last_tk and TkCOMMA === last_tk
when TkSPACE then
# expression continues
when TkDO then
unget_tk tk
parse_statements container, single, meth
break
else
last_tk = tk
end
end
end
meth.comment = comment
@stats.add_method meth
end
##
# Parses a normal method defined by +def+
def parse_method(container, single, tk, comment)
added_container = nil
meth = nil
name = nil
column = tk.char_no
offset = tk.seek
line_no = tk.line_no
start_collecting_tokens
add_token tk
token_listener self do
@scanner.instance_eval do @lex_state = EXPR_FNAME end
skip_tkspace
name_t = get_tk
back_tk = skip_tkspace
meth = nil
added_container = false
dot = get_tk
if TkDOT === dot or TkCOLON2 === dot then
@scanner.instance_eval do @lex_state = EXPR_FNAME end
skip_tkspace
name_t2 = get_tk
case name_t
when TkSELF, TkMOD then
name = name_t2.name
when TkCONSTANT then
name = name_t2.name
prev_container = container
container = container.find_module_named(name_t.name)
unless container then
added_container = true
obj = name_t.name.split("::").inject(Object) do |state, item|
state.const_get(item)
end rescue nil
type = obj.class == Class ? RDoc::NormalClass : RDoc::NormalModule
unless [Class, Module].include?(obj.class) then
warn("Couldn't find #{name_t.name}. Assuming it's a module")
end
if type == RDoc::NormalClass then
sclass = obj.superclass ? obj.superclass.name : nil
container = prev_container.add_class type, name_t.name, sclass
else
container = prev_container.add_module type, name_t.name
end
container.record_location @top_level
end
when TkIDENTIFIER, TkIVAR, TkGVAR then
dummy = RDoc::Context.new
dummy.parent = container
skip_method dummy
return
when TkTRUE, TkFALSE, TkNIL then
klass_name = "#{name_t.name.capitalize}Class"
container = RDoc::TopLevel.find_class_named klass_name
container ||= @top_level.add_class RDoc::NormalClass, klass_name
name = name_t2.name
else
warn "unexpected method name token #{name_t.inspect}"
# break
skip_method container
return
end
meth = RDoc::AnyMethod.new(get_tkread, name)
meth.singleton = true
else
unget_tk dot
back_tk.reverse_each do |token|
unget_tk token
end
name = case name_t
when TkSTAR, TkAMPER then
name_t.text
else
unless name_t.respond_to? :name then
warn "expected method name token, . or ::, got #{name_t.inspect}"
skip_method container
return
end
name_t.name
end
meth = RDoc::AnyMethod.new get_tkread, name
meth.singleton = (single == SINGLE)
end
end
meth.record_location @top_level
meth.offset = offset
meth.line = line_no
meth.start_collecting_tokens
indent = TkSPACE.new nil, 1, 1
indent.set_text " " * column
token = TkCOMMENT.new nil, line_no, 1
token.set_text "# File #{@top_level.absolute_name}, line #{line_no}"
meth.add_tokens [token, NEWLINE_TOKEN, indent]
meth.add_tokens @token_stream
token_listener meth do
@scanner.instance_eval do @continue = false end
parse_method_parameters meth
if meth.document_self then
container.add_method meth
elsif added_container then
container.document_self = false
end
# Having now read the method parameters and documentation modifiers, we
# now know whether we have to rename #initialize to ::new
if name == "initialize" && !meth.singleton then
if meth.dont_rename_initialize then
meth.visibility = :protected
else
meth.singleton = true
meth.name = "new"
meth.visibility = :public
end
end
parse_statements container, single, meth
end
extract_call_seq comment, meth
meth.comment = comment
@stats.add_method meth
end
##
# Extracts +yield+ parameters from +method+
def parse_method_or_yield_parameters(method = nil,
modifiers = RDoc::METHOD_MODIFIERS)
skip_tkspace false
tk = get_tk
# Little hack going on here. In the statement
# f = 2*(1+yield)
# We see the RPAREN as the next token, so we need
# to exit early. This still won't catch all cases
# (such as "a = yield + 1"
end_token = case tk
when TkLPAREN, TkfLPAREN
TkRPAREN
when TkRPAREN
return ""
else
TkNL
end
nest = 0
loop do
case tk
when TkSEMICOLON then
break if nest == 0
when TkLBRACE, TkfLBRACE then
nest += 1
when TkRBRACE then
nest -= 1
if nest <= 0
# we might have a.each { |i| yield i }
unget_tk(tk) if nest < 0
break
end
when TkLPAREN, TkfLPAREN then
nest += 1
when end_token then
if end_token == TkRPAREN
nest -= 1
break if @scanner.lex_state == EXPR_END and nest <= 0
else
break unless @scanner.continue
end
when TkRPAREN then
nest -= 1
when method && method.block_params.nil? && TkCOMMENT then
unget_tk tk
read_documentation_modifiers method, modifiers
@read.pop
when TkCOMMENT then
@read.pop
when nil then
break
end
tk = get_tk
end
res = get_tkread.gsub(/\s+/, ' ').strip
res = '' if res == ';'
res
end
##
# Capture the method's parameters. Along the way, look for a comment
# containing:
#
# # yields: ....
#
# and add this as the block_params for the method
def parse_method_parameters(method)
res = parse_method_or_yield_parameters method
res = "(#{res})" unless res =~ /\A\(/
method.params = res unless method.params
if method.block_params.nil? then
skip_tkspace false
read_documentation_modifiers method, RDoc::METHOD_MODIFIERS
end
end
##
# Parses an RDoc::NormalModule in +container+ with +comment+
def parse_module(container, single, tk, comment)
container, name_t, = get_class_or_module container
name = name_t.name
mod = container.add_module RDoc::NormalModule, name
mod.record_location @top_level
read_documentation_modifiers mod, RDoc::CLASS_MODIFIERS
mod.add_comment comment, @top_level
parse_statements(mod)
@top_level.add_to_classes_or_modules mod
@stats.add_module mod
end
##
# Parses an RDoc::Require in +context+ containing +comment+
def parse_require(context, comment)
skip_tkspace_comment
tk = get_tk
if TkLPAREN === tk then
skip_tkspace_comment
tk = get_tk
end
name = tk.text if TkSTRING === tk
if name then
@top_level.add_require RDoc::Require.new(name, comment)
else
unget_tk tk
end
end
##
# The core of the ruby parser.
def parse_statements(container, single = NORMAL, current_method = nil,
comment = '')
comment.force_encoding @encoding if @encoding
nest = 1
save_visibility = container.visibility
non_comment_seen = true
while tk = get_tk do
keep_comment = false
try_parse_comment = false
non_comment_seen = true unless TkCOMMENT === tk
case tk
when TkNL then
skip_tkspace
tk = get_tk
if TkCOMMENT === tk then
if non_comment_seen then
# Look for RDoc in a comment about to be thrown away
non_comment_seen = parse_comment container, tk, comment unless
comment.empty?
comment = ''
comment.force_encoding @encoding if @encoding
end
while TkCOMMENT === tk do
comment << tk.text << "\n"
tk = get_tk
if TkNL === tk then
skip_tkspace false # leading spaces
tk = get_tk
end
end
unless comment.empty? then
look_for_directives_in container, comment
if container.done_documenting then
container.ongoing_visibility = save_visibility
end
end
keep_comment = true
else
non_comment_seen = true
end
unget_tk tk # TODO peek instead of get then unget
keep_comment = true
when TkCLASS then
parse_class container, single, tk, comment
when TkMODULE then
if container.document_children then
parse_module container, single, tk, comment
else
nest += 1
end
when TkDEF then
parse_method container, single, tk, comment
when TkCONSTANT then
unless parse_constant container, tk, comment then
try_parse_comment = true
end
when TkALIAS then
parse_alias container, single, tk, comment unless current_method
when TkYIELD then
if current_method.nil? then
warn "Warning: yield outside of method" if container.document_self
else
parse_yield container, single, tk, current_method
end
# Until and While can have a 'do', which shouldn't increase the nesting.
# We can't solve the general case, but we can handle most occurrences by
# ignoring a do at the end of a line.
when TkUNTIL, TkWHILE then
nest += 1
skip_optional_do_after_expression
# 'for' is trickier
when TkFOR then
nest += 1
skip_for_variable
skip_optional_do_after_expression
when TkCASE, TkDO, TkIF, TkUNLESS, TkBEGIN then
nest += 1
when TkIDENTIFIER then
if nest == 1 and current_method.nil? then
case tk.name
when 'private', 'protected', 'public', 'private_class_method',
'public_class_method', 'module_function' then
parse_visibility container, single, tk
keep_comment = true
when 'attr' then
parse_attr container, single, tk, comment
when /^attr_(reader|writer|accessor)$/ then
parse_attr_accessor container, single, tk, comment
when 'alias_method' then
parse_alias container, single, tk, comment
when 'require', 'include' then
# ignore
else
if comment =~ /\A#\#$/ then
case comment
when /^# +:?attr(_reader|_writer|_accessor)?:/ then
parse_meta_attr container, single, tk, comment
else
parse_meta_method container, single, tk, comment
end
end
end
end
case tk.name
when "require" then
parse_require container, comment
when "include" then
parse_include container, comment
end
when TkEND then
nest -= 1
if nest == 0 then
read_documentation_modifiers container, RDoc::CLASS_MODIFIERS
container.ongoing_visibility = save_visibility
parse_comment container, tk, comment unless comment.empty?
return
end
else
try_parse_comment = nest == 1
end
if try_parse_comment then
non_comment_seen = parse_comment container, tk, comment unless
comment.empty?
keep_comment = false
end
unless keep_comment then
comment = ''
comment.force_encoding @encoding if @encoding
end
begin
get_tkread
skip_tkspace false
end while peek_tk == TkNL
end
end
##
# Parse up to +no+ symbol arguments
def parse_symbol_arg(no = nil)
args = []
skip_tkspace_comment
case tk = get_tk
when TkLPAREN
loop do
skip_tkspace_comment
if tk1 = parse_symbol_in_arg
args.push tk1
break if no and args.size >= no
end
skip_tkspace_comment
case tk2 = get_tk
when TkRPAREN
break
when TkCOMMA
else
warn("unexpected token: '#{tk2.inspect}'") if $DEBUG_RDOC
break
end
end
else
unget_tk tk
if tk = parse_symbol_in_arg
args.push tk
return args if no and args.size >= no
end
loop do
skip_tkspace false
tk1 = get_tk
unless TkCOMMA === tk1 then
unget_tk tk1
break
end
skip_tkspace_comment
if tk = parse_symbol_in_arg
args.push tk
break if no and args.size >= no
end
end
end
args
end
##
# Returns symbol text from the next token
def parse_symbol_in_arg
case tk = get_tk
when TkSYMBOL
tk.text.sub(/^:/, '')
when TkSTRING
eval @read[-1]
when TkDSTRING, TkIDENTIFIER then
nil # ignore
else
warn("Expected symbol or string, got #{tk.inspect}") if $DEBUG_RDOC
nil
end
end
##
# Parses statements in the top-level +container+
def parse_top_level_statements container
comment = collect_first_comment
look_for_directives_in container, comment
# HACK move if to RDoc::Context#comment=
container.comment = comment if container.document_self unless comment.empty?
parse_statements container, NORMAL, nil, comment
end
##
# Determines the visibility in +container+ from +tk+
def parse_visibility(container, single, tk)
singleton = (single == SINGLE)
vis_type = tk.name
vis = case vis_type
when 'private' then :private
when 'protected' then :protected
when 'public' then :public
when 'private_class_method' then
singleton = true
:private
when 'public_class_method' then
singleton = true
:public
when 'module_function' then
singleton = true
:public
else
raise RDoc::Error, "Invalid visibility: #{tk.name}"
end
skip_tkspace_comment false
case peek_tk
# Ryan Davis suggested the extension to ignore modifiers, because he
# often writes
#
# protected unless $TESTING
#
when TkNL, TkUNLESS_MOD, TkIF_MOD, TkSEMICOLON then
container.ongoing_visibility = vis
else
new_methods = []
case vis_type
when 'module_function' then
args = parse_symbol_arg
container.set_visibility_for args, :private, false
container.methods_matching args do |m|
s_m = m.dup
s_m.record_location @top_level
s_m.singleton = true
new_methods << s_m
end
when 'public_class_method', 'private_class_method' then
args = parse_symbol_arg
container.methods_matching args, true do |m|
if m.parent != container then
m = m.dup
m.record_location @top_level
new_methods << m
end
m.visibility = vis
end
else
args = parse_symbol_arg
container.set_visibility_for args, vis, singleton
end
new_methods.each do |method|
case method
when RDoc::AnyMethod then
container.add_method method
when RDoc::Attr then
container.add_attribute method
end
method.visibility = vis
end
end
end
##
# Determines the block parameter for +context+
def parse_yield(context, single, tk, method)
return if method.block_params
get_tkread
@scanner.instance_eval { @continue = false }
method.block_params = parse_method_or_yield_parameters
end
##
# Directives are modifier comments that can appear after class, module, or
# method names. For example:
#
# def fred # :yields: a, b
#
# or:
#
# class MyClass # :nodoc:
#
# We return the directive name and any parameters as a two element array
def read_directive allowed
tk = get_tk
if TkCOMMENT === tk then
return unless tk.text =~ /\s*:?(\w+):\s*(.*)/
directive = $1.downcase
return [directive, $2] if allowed.include? directive
else
unget_tk tk
end
end
##
# Handles the directive for +context+ if the directive is listed in +allow+.
# This method is called for directives following a definition.
def read_documentation_modifiers context, allow
directive, value = read_directive allow
return unless directive
@preprocess.handle_directive '', directive, value, context do |dir, param|
if %w[notnew not_new not-new].include? dir then
context.dont_rename_initialize = true
true
end
end
end
##
# Removes private comments from +comment+
def remove_private_comments(comment)
empty = ''
empty.force_encoding comment.encoding if Object.const_defined? :Encoding
comment.gsub!(/^#--.*?^#\+\+\n?/m, empty)
comment.sub!(/^#--.*/m, '')
end
##
# Scans this ruby file for ruby constructs
def scan
reset
catch :eof do
begin
parse_top_level_statements @top_level
rescue StandardError => e
bytes = ''
20.times do @scanner.ungetc end
count = 0
60.times do |i|
count = i
byte = @scanner.getc
break unless byte
bytes << byte
end
count -= 20
count.times do @scanner.ungetc end
$stderr.puts <<-EOF
#{self.class} failure around line #{@scanner.line_no} of
#{@file_name}
EOF
unless bytes.empty? then
$stderr.puts
$stderr.puts bytes.inspect
end
raise e
end
end
@top_level
end
##
# while, until, and for have an optional do
def skip_optional_do_after_expression
skip_tkspace false
tk = get_tk
case tk
when TkLPAREN, TkfLPAREN then
end_token = TkRPAREN
else
end_token = TkNL
end
b_nest = 0
nest = 0
@scanner.instance_eval { @continue = false }
loop do
case tk
when TkSEMICOLON then
break if b_nest.zero?
when TkLPAREN, TkfLPAREN then
nest += 1
when TkBEGIN then
b_nest += 1
when TkEND then
b_nest -= 1
when TkDO
break if nest.zero?
when end_token then
if end_token == TkRPAREN
nest -= 1
break if @scanner.lex_state == EXPR_END and nest.zero?
else
break unless @scanner.continue
end
when nil then
break
end
tk = get_tk
end
skip_tkspace false
get_tk if TkDO === peek_tk
end
##
# skip the var [in] part of a 'for' statement
def skip_for_variable
skip_tkspace false
tk = get_tk
skip_tkspace false
tk = get_tk
unget_tk(tk) unless TkIN === tk
end
##
# Skips the next method in +container+
def skip_method container
meth = RDoc::AnyMethod.new "", "anon"
parse_method_parameters meth
parse_statements container, false, meth
end
##
# Skip spaces until a comment is found
def skip_tkspace_comment(skip_nl = true)
loop do
skip_tkspace skip_nl
return unless TkCOMMENT === peek_tk
get_tk
end
end
##
# Prints +msg+ to +$stderr+ unless we're being quiet
def warn(msg)
return if @options.quiet
msg = make_message msg
$stderr.puts msg
end
end