234 lines
7.6 KiB
Lua
234 lines
7.6 KiB
Lua
-- parsing code for doc comments
|
|
|
|
require 'pl'
|
|
local lexer = require 'ldoc.lexer'
|
|
local tools = require 'ldoc.tools'
|
|
local doc = require 'ldoc.doc'
|
|
local Item,File = doc.Item,doc.File
|
|
|
|
------ Parsing the Source --------------
|
|
-- This uses the lexer from PL, but it should be possible to use Peter Odding's
|
|
-- excellent Lpeg based lexer instead.
|
|
|
|
local parse = {}
|
|
|
|
local tnext, append = lexer.skipws, table.insert
|
|
|
|
-- a pattern particular to LuaDoc tag lines: the line must begin with @TAG,
|
|
-- followed by the value, which may extend over several lines.
|
|
local luadoc_tag = '^%s*@(%a+)'
|
|
local luadoc_tag_value = luadoc_tag..'(.*)'
|
|
|
|
-- assumes that the doc comment consists of distinct tag lines
|
|
function parse_tags(text)
|
|
local lines = stringio.lines(text)
|
|
local preamble, line = tools.grab_while_not(lines,luadoc_tag)
|
|
local tag_items = {}
|
|
local follows
|
|
while line do
|
|
local tag,rest = line:match(luadoc_tag_value)
|
|
follows, line = tools.grab_while_not(lines,luadoc_tag)
|
|
append(tag_items,{tag, rest .. '\n' .. follows})
|
|
end
|
|
return preamble,tag_items
|
|
end
|
|
|
|
-- This takes the collected comment block, and uses the docstyle to
|
|
-- extract tags and values. Assume that the summary ends in a period or a question
|
|
-- mark, and everything else in the preamble is the description.
|
|
-- If a tag appears more than once, then its value becomes a list of strings.
|
|
-- Alias substitution and @TYPE NAME shortcutting is handled by Item.check_tag
|
|
local function extract_tags (s)
|
|
if s:match '^%s*$' then return {} end
|
|
local preamble,tag_items = parse_tags(s)
|
|
local strip = tools.strip
|
|
local summary, description = preamble:match('^(.-[%.?])(%s.+)')
|
|
if not summary then
|
|
-- perhaps the first sentence did not have a . or ? terminating it.
|
|
-- Then try split at linefeed
|
|
summary, description = preamble:match('^(.-\n\n)(.+)')
|
|
if not summary then
|
|
summary = preamble
|
|
end
|
|
end -- and strip(description) ?
|
|
local tags = {summary=summary and strip(summary) or '',description=description or ''}
|
|
for _,item in ipairs(tag_items) do
|
|
local tag,value = item[1],item[2]
|
|
tag = Item.check_tag(tags,tag)
|
|
value = strip(value)
|
|
local old_value = tags[tag]
|
|
|
|
if old_value then
|
|
if type(old_value)=='string' then tags[tag] = List{old_value} end
|
|
tags[tag]:append(value)
|
|
else
|
|
tags[tag] = value
|
|
end
|
|
end
|
|
return Map(tags)
|
|
end
|
|
|
|
|
|
|
|
-- parses a Lua or C file, looking for ldoc comments. These are like LuaDoc comments;
|
|
-- they start with multiple '-'. (Block commments are allowed)
|
|
-- If they don't define a name tag, then by default
|
|
-- it is assumed that a function definition follows. If it is the first comment
|
|
-- encountered, then ldoc looks for a call to module() to find the name of the
|
|
-- module if there isn't an explicit module name specified.
|
|
|
|
local function parse_file(fname,lang, package)
|
|
local line,f = 1
|
|
local F = File(fname)
|
|
local module_found, first_comment = false,true
|
|
local current_item
|
|
|
|
local tok,f = lang.lexer(fname)
|
|
|
|
function lineno ()
|
|
return tok:lineno()
|
|
end
|
|
|
|
function filename () return fname end
|
|
|
|
function F:warning (msg,kind,line)
|
|
kind = kind or 'warning'
|
|
line = line or lineno()
|
|
io.stderr:write(kind..' '..fname..':'..line..': '..msg,'\n')
|
|
end
|
|
|
|
function F:error (msg)
|
|
self:warning(msg,'error')
|
|
os.exit(1)
|
|
end
|
|
|
|
local function add_module(tags,module_found,old_style)
|
|
tags.name = module_found
|
|
tags.class = 'module'
|
|
local item = F:new_item(tags,lineno())
|
|
item.old_style = old_style
|
|
end
|
|
|
|
local mod
|
|
local t,v = tnext(tok)
|
|
if lang.parse_module_call and t ~= 'comment'then
|
|
while t and not (t == 'iden' and v == 'module') do
|
|
t,v = tnext(tok)
|
|
end
|
|
if not t then
|
|
F:warning("no module() call found; no initial doc comment")
|
|
else
|
|
mod,t,v = lang:parse_module_call(tok,t,v)
|
|
if mod ~= '...' then
|
|
add_module({summary='(no description)'},mod,true)
|
|
first_comment = false
|
|
module_found = true
|
|
end
|
|
end
|
|
end
|
|
while t do
|
|
if t == 'comment' then
|
|
local comment = {}
|
|
local ldoc_comment,block = lang:start_comment(v)
|
|
|
|
if ldoc_comment and block then
|
|
t,v = lang:grab_block_comment(v,tok)
|
|
end
|
|
|
|
if lang:empty_comment(v) then -- ignore rest of empty start comments
|
|
t,v = tok()
|
|
end
|
|
|
|
while t and t == 'comment' do
|
|
v = lang:trim_comment(v)
|
|
append(comment,v)
|
|
t,v = tok()
|
|
if t == 'space' and not v:match '\n' then
|
|
t,v = tok()
|
|
end
|
|
end
|
|
if not t then break end -- no more file!
|
|
|
|
if t == 'space' then t,v = tnext(tok) end
|
|
|
|
local item_follows, tags, is_local
|
|
if ldoc_comment or first_comment then
|
|
comment = table.concat(comment)
|
|
if not ldoc_comment and first_comment then
|
|
F:warning("first comment must be a doc comment!")
|
|
break
|
|
end
|
|
if first_comment then
|
|
first_comment = false
|
|
else
|
|
item_follows, is_local = lang:item_follows(t,v,tok)
|
|
end
|
|
if item_follows or comment:find '@'then
|
|
tags = extract_tags(comment)
|
|
if doc.project_level(tags.class) then
|
|
module_found = tags.name
|
|
end
|
|
doc.expand_annotation_item(tags,current_item)
|
|
-- if the item has an explicit name or defined meaning
|
|
-- then don't continue to do any code analysis!
|
|
if tags.name then
|
|
item_follows, is_local = false, false
|
|
end
|
|
end
|
|
end
|
|
-- some hackery necessary to find the module() call
|
|
if not module_found and ldoc_comment then
|
|
local old_style
|
|
module_found,t,v = lang:find_module(tok,t,v)
|
|
-- right, we can add the module object ...
|
|
old_style = module_found ~= nil
|
|
if not module_found or module_found == '...' then
|
|
-- we have to guess the module name
|
|
module_found = tools.this_module_name(package,fname)
|
|
end
|
|
if not tags then tags = extract_tags(comment) end
|
|
add_module(tags,module_found,old_style)
|
|
tags = nil
|
|
if not t then
|
|
F:warning(fname,' contains no items\n','warning',1)
|
|
break;
|
|
end -- run out of file!
|
|
-- if we did bump into a doc comment, then we can continue parsing it
|
|
end
|
|
|
|
-- end of a block of document comments
|
|
if ldoc_comment and tags then
|
|
local line = t ~= nil and lineno() or 666
|
|
if t ~= nil then
|
|
if item_follows then -- parse the item definition
|
|
item_follows(tags,tok)
|
|
else
|
|
lang:parse_extra(tags,tok)
|
|
end
|
|
end
|
|
-- local functions treated specially
|
|
if tags.class == 'function' and (is_local or tags['local']) then
|
|
tags.class = 'lfunction'
|
|
end
|
|
if tags.name then
|
|
current_item = F:new_item(tags,line)
|
|
current_item.inferred = item_follows ~= nil
|
|
end
|
|
if not t then break end
|
|
end
|
|
end
|
|
if t ~= 'comment' then t,v = tok() end
|
|
end
|
|
if f then f:close() end
|
|
return F
|
|
end
|
|
|
|
function parse.file(name,lang, args)
|
|
local F,err = parse_file(name,lang, args.package)
|
|
if err then return nil,err end
|
|
F:finish()
|
|
return F
|
|
end
|
|
|
|
return parse
|