diff options
Diffstat (limited to 'lib/stdlib/src/erl_pp.erl')
| -rw-r--r-- | lib/stdlib/src/erl_pp.erl | 403 |
1 files changed, 238 insertions, 165 deletions
diff --git a/lib/stdlib/src/erl_pp.erl b/lib/stdlib/src/erl_pp.erl index 82bc2c1460..367dbefb82 100644 --- a/lib/stdlib/src/erl_pp.erl +++ b/lib/stdlib/src/erl_pp.erl @@ -1,18 +1,19 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2013. All Rights Reserved. +%% Copyright Ericsson AB 1996-2017. All Rights Reserved. %% -%% The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved online at http://www.erlang.org/. +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at %% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. %% %% %CopyrightEnd% %% @@ -22,12 +23,13 @@ %%% the parser. It does not always produce pretty code. -export([form/1,form/2, - attribute/1,attribute/2,function/1,function/2,rule/1,rule/2, + attribute/1,attribute/2,function/1,function/2, guard/1,guard/2,exprs/1,exprs/2,exprs/3,expr/1,expr/2,expr/3,expr/4]). -import(lists, [append/1,foldr/3,mapfoldl/3,reverse/1,reverse/2]). -import(io_lib, [write/1,format/2]). --import(erl_parse, [inop_prec/1,preop_prec/1,func_prec/0,max_prec/0]). +-import(erl_parse, [inop_prec/1,preop_prec/1,func_prec/0,max_prec/0, + type_inop_prec/1, type_preop_prec/1]). -define(MAXLINE, 72). @@ -42,27 +44,56 @@ | {encoding, latin1 | unicode | utf8}). -type(options() :: hook_function() | [option()]). --record(pp, {string_fun, char_fun}). +-record(pp, {value_fun, string_fun, char_fun}). -record(options, {hook, encoding, opts}). +%-define(DEBUG, true). + +-ifdef(DEBUG). +-define(FORM_TEST(T), + _ = case T of + {eof, _Line} -> ok; + {warning, _W} -> ok; + {error, _E} -> ok; + _ -> ?TEST(T) + end). +-define(EXPRS_TEST(L), + [?TEST(E) || E <- L]). +-define(TEST(T), + %% Assumes that erl_anno has been compiled with DEBUG=true. + %% erl_pp does not use the annoations, but test it anyway. + %% Note: hooks are not handled. + _ = try + erl_parse:map_anno(fun(A) when is_list(A) -> A end, T) + catch + _:_ -> + erlang:error(badarg, [T]) + end). +-else. +-define(FORM_TEST(T), ok). +-define(EXPRS_TEST(T), ok). +-define(TEST(T), ok). +-endif. + %%% %%% Exported functions %%% -spec(form(Form) -> io_lib:chars() when - Form :: erl_parse:abstract_form()). + Form :: erl_parse:abstract_form() | erl_parse:form_info()). form(Thing) -> form(Thing, none). -spec(form(Form, Options) -> io_lib:chars() when - Form :: erl_parse:abstract_form(), + Form :: erl_parse:abstract_form() | erl_parse:form_info(), Options :: options()). form(Thing, Options) -> + ?FORM_TEST(Thing), State = state(Options), - frmt(lform(Thing, options(Options), State), State). + frmt(lform(Thing, options(Options)), State). -spec(attribute(Attribute) -> io_lib:chars() when Attribute :: erl_parse:abstract_form()). @@ -75,8 +106,9 @@ attribute(Thing) -> Options :: options()). attribute(Thing, Options) -> + ?TEST(Thing), State = state(Options), - frmt(lattribute(Thing, options(Options), State), State). + frmt(lattribute(Thing, options(Options)), State). -spec(function(Function) -> io_lib:chars() when Function :: erl_parse:abstract_form()). @@ -89,14 +121,9 @@ function(F) -> Options :: options()). function(F, Options) -> + ?TEST(F), frmt(lfunction(F, options(Options)), state(Options)). -rule(R) -> - rule(R, none). - -rule(R, Options) -> - frmt(lrule(R, options(Options)), state(Options)). - -spec(guard(Guard) -> io_lib:chars() when Guard :: [erl_parse:abstract_expr()]). @@ -108,6 +135,7 @@ guard(Gs) -> Options :: options()). guard(Gs, Options) -> + ?EXPRS_TEST(Gs), frmt(lguard(Gs, options(Options)), state(Options)). -spec(exprs(Expressions) -> io_lib:chars() when @@ -129,12 +157,14 @@ exprs(Es, Options) -> Options :: options()). exprs(Es, I, Options) -> + ?EXPRS_TEST(Es), frmt({seq,[],[],[$,],lexprs(Es, options(Options))}, I, state(Options)). -spec(expr(Expression) -> io_lib:chars() when Expression :: erl_parse:abstract_expr()). expr(E) -> + ?TEST(E), frmt(lexpr(E, 0, options(none)), state(none)). -spec(expr(Expression, Options) -> io_lib:chars() when @@ -142,6 +172,7 @@ expr(E) -> Options :: options()). expr(E, Options) -> + ?TEST(E), frmt(lexpr(E, 0, options(Options)), state(Options)). -spec(expr(Expression, Indent, Options) -> io_lib:chars() when @@ -150,6 +181,7 @@ expr(E, Options) -> Options :: options()). expr(E, I, Options) -> + ?TEST(E), frmt(lexpr(E, 0, options(Options)), I, state(Options)). -spec(expr(Expression, Indent, Precedence, Options) -> io_lib:chars() when @@ -159,6 +191,7 @@ expr(E, I, Options) -> Options :: options()). expr(E, I, P, Options) -> + ?TEST(E), frmt(lexpr(E, P, options(Options)), I, state(Options)). %%% @@ -181,11 +214,15 @@ state(_Hook) -> state(). state() -> - #pp{string_fun = fun io_lib:write_string_as_latin1/1, + Options = [{encoding,latin1}], + #pp{value_fun = fun(V) -> io_lib_pretty:print(V, Options) end, + string_fun = fun io_lib:write_string_as_latin1/1, char_fun = fun io_lib:write_char_as_latin1/1}. unicode_state() -> - #pp{string_fun = fun io_lib:write_string/1, + Options = [{encoding,unicode}], + #pp{value_fun = fun(V) -> io_lib_pretty:print(V, Options) end, + string_fun = fun io_lib:write_string/1, char_fun = fun io_lib:write_char/1}. encoding(Options) -> @@ -195,95 +232,127 @@ encoding(Options) -> unicode -> unicode end. -lform({attribute,Line,Name,Arg}, Opts, State) -> - lattribute({attribute,Line,Name,Arg}, Opts, State); -lform({function,Line,Name,Arity,Clauses}, Opts, _State) -> +lform({attribute,Line,Name,Arg}, Opts) -> + lattribute({attribute,Line,Name,Arg}, Opts); +lform({function,Line,Name,Arity,Clauses}, Opts) -> lfunction({function,Line,Name,Arity,Clauses}, Opts); -lform({rule,Line,Name,Arity,Clauses}, Opts, _State) -> - lrule({rule,Line,Name,Arity,Clauses}, Opts); %% These are specials to make it easier for the compiler. -lform({error,E}, _Opts, _State) -> - leaf(format("~p\n", [{error,E}])); -lform({warning,W}, _Opts, _State) -> - leaf(format("~p\n", [{warning,W}])); -lform({eof,_Line}, _Opts, _State) -> +lform({error,_}=E, Opts) -> + message(E, Opts); +lform({warning,_}=W, Opts) -> + message(W, Opts); +lform({eof,_Line}, _Opts) -> $\n. -lattribute({attribute,_Line,type,Type}, Opts, _State) -> +message(M, #options{encoding = Encoding}) -> + F = case Encoding of + latin1 -> "~p\n"; + unicode -> "~tp\n" + end, + leaf(format(F, [M])). + +lattribute({attribute,_Line,type,Type}, Opts) -> [typeattr(type, Type, Opts),leaf(".\n")]; -lattribute({attribute,_Line,opaque,Type}, Opts, _State) -> +lattribute({attribute,_Line,opaque,Type}, Opts) -> [typeattr(opaque, Type, Opts),leaf(".\n")]; -lattribute({attribute,_Line,spec,Arg}, _Opts, _State) -> +lattribute({attribute,_Line,spec,Arg}, _Opts) -> [specattr(spec, Arg),leaf(".\n")]; -lattribute({attribute,_Line,callback,Arg}, _Opts, _State) -> +lattribute({attribute,_Line,callback,Arg}, _Opts) -> [specattr(callback, Arg),leaf(".\n")]; -lattribute({attribute,_Line,Name,Arg}, Opts, State) -> - [lattribute(Name, Arg, Opts, State),leaf(".\n")]. - -lattribute(module, {M,Vs}, _Opts, _State) -> - attr("module",[{var,0,pname(M)}, - foldr(fun(V, C) -> {cons,0,{var,0,V},C} - end, {nil,0}, Vs)]); -lattribute(module, M, _Opts, _State) -> - attr("module", [{var,0,pname(M)}]); -lattribute(export, Falist, _Opts, _State) -> - call({var,0,"-export"}, [falist(Falist)], 0, options(none)); -lattribute(import, Name, _Opts, _State) when is_list(Name) -> - attr("import", [{var,0,pname(Name)}]); -lattribute(import, {From,Falist}, _Opts, _State) -> - attr("import",[{var,0,pname(From)},falist(Falist)]); -lattribute(file, {Name,Line}, _Opts, State) -> - attr("file", [{var,0,(State#pp.string_fun)(Name)},{integer,0,Line}]); -lattribute(record, {Name,Is}, Opts, _State) -> - Nl = leaf(format("-record(~w,", [Name])), +lattribute({attribute,_Line,Name,Arg}, Opts) -> + [lattribute(Name, Arg, Opts),leaf(".\n")]. + +lattribute(module, {M,Vs}, _Opts) -> + A = a0(), + attr(module,[{var,A,pname(M)}, + foldr(fun(V, C) -> {cons,A,{var,A,V},C} + end, {nil,A}, Vs)]); +lattribute(module, M, _Opts) -> + attr(module, [{var,a0(),pname(M)}]); +lattribute(export, Falist, _Opts) -> + attrib(export, falist(Falist)); +lattribute(import, Name, _Opts) when is_list(Name) -> + attr(import, [{var,a0(),pname(Name)}]); +lattribute(import, {From,Falist}, _Opts) -> + attrib(import, [leaf(pname(From)),falist(Falist)]); +lattribute(export_type, Talist, _Opts) -> + attrib(export_type, falist(Talist)); +lattribute(optional_callbacks, Falist, Opts) -> + try attrib(optional_callbacks, falist(Falist)) + catch _:_ -> attr(optional_callbacks, [abstract(Falist, Opts)]) + end; +lattribute(file, {Name,Line}, _Opts) -> + attr(file, [{string,a0(),Name},{integer,a0(),Line}]); +lattribute(record, {Name,Is}, Opts) -> + Nl = [leaf("-record("),{atom,Name},$,], [{first,Nl,record_fields(Is, Opts)},$)]; -lattribute(Name, Arg, #options{encoding = Encoding}, _State) -> - attr(write(Name), [erl_parse:abstract(Arg, [{encoding,Encoding}])]). +lattribute(Name, Arg, Options) -> + attr(Name, [abstract(Arg, Options)]). + +abstract(Arg, #options{encoding = Encoding}) -> + erl_parse:abstract(Arg, [{encoding,Encoding}]). typeattr(Tag, {TypeName,Type,Args}, _Opts) -> {first,leaf("-"++atom_to_list(Tag)++" "), - typed(call({atom,0,TypeName}, Args, 0, options(none)), Type)}. - -ltype({ann_type,_Line,[V,T]}) -> - typed(lexpr(V, options(none)), T); -ltype({paren_type,_Line,[T]}) -> - [$(,ltype(T),$)]; -ltype({type,_Line,union,Ts}) -> - {seq,[],[],[' |'],ltypes(Ts)}; -ltype({type,_Line,list,[T]}) -> + typed(call({atom,a0(),TypeName}, Args, 0, options(none)), Type)}. + +ltype(T) -> + ltype(T, 0). + +ltype({ann_type,_Line,[V,T]}, Prec) -> + {_L,P,_R} = type_inop_prec('::'), + E = typed(lexpr(V, options(none)), T), + maybe_paren(P, Prec, E); +ltype({paren_type,_Line,[T]}, P) -> + %% Generated before Erlang/OTP 18. + ltype(T, P); +ltype({type,_Line,union,Ts}, Prec) -> + {_L,P,R} = type_inop_prec('|'), + E = {seq,[],[],[' |'],ltypes(Ts, R)}, + maybe_paren(P, Prec, E); +ltype({type,_Line,list,[T]}, _) -> {seq,$[,$],$,,[ltype(T)]}; -ltype({type,_Line,nonempty_list,[T]}) -> +ltype({type,_Line,nonempty_list,[T]}, _) -> {seq,$[,$],[$,],[ltype(T),leaf("...")]}; -ltype({type,Line,nil,[]}) -> - lexpr({nil,Line}, 0, options(none)); -ltype({type,Line,map,any}) -> +ltype({type,Line,nil,[]}, _) -> + lexpr({nil,Line}, options(none)); +ltype({type,Line,map,any}, _) -> simple_type({atom,Line,map}, []); -ltype({type,_Line,map,Pairs}) -> - map_type(Pairs); -ltype({type,Line,tuple,any}) -> +ltype({type,_Line,map,Pairs}, Prec) -> + {P,_R} = type_preop_prec('#'), + E = map_type(Pairs), + maybe_paren(P, Prec, E); +ltype({type,Line,tuple,any}, _) -> simple_type({atom,Line,tuple}, []); -ltype({type,_Line,tuple,Ts}) -> - tuple_type(Ts, fun ltype/1); -ltype({type,_Line,record,[{atom,_,N}|Fs]}) -> - record_type(N, Fs); -ltype({type,_Line,range,[_I1,_I2]=Es}) -> - expr_list(Es, '..', fun lexpr/2, options(none)); -ltype({type,_Line,binary,[I1,I2]}) -> +ltype({type,_Line,tuple,Ts}, _) -> + tuple_type(Ts, fun ltype/2); +ltype({type,_Line,record,[{atom,_,N}|Fs]}, Prec) -> + {P,_R} = type_preop_prec('#'), + E = record_type(N, Fs), + maybe_paren(P, Prec, E); +ltype({type,_Line,range,[_I1,_I2]=Es}, Prec) -> + {_L,P,R} = type_inop_prec('..'), + F = fun(E, Opts) -> lexpr(E, R, Opts) end, + E = expr_list(Es, '..', F, options(none)), + maybe_paren(P, Prec, E); +ltype({type,_Line,binary,[I1,I2]}, _) -> binary_type(I1, I2); % except binary() -ltype({type,_Line,'fun',[]}) -> +ltype({type,_Line,'fun',[]}, _) -> leaf("fun()"); -ltype({type,_,'fun',[{type,_,any},_]}=FunType) -> +ltype({type,_,'fun',[{type,_,any},_]}=FunType, _) -> [fun_type(['fun',$(], FunType),$)]; -ltype({type,_Line,'fun',[{type,_,product,_},_]}=FunType) -> +ltype({type,_Line,'fun',[{type,_,product,_},_]}=FunType, _) -> [fun_type(['fun',$(], FunType),$)]; -ltype({type,Line,T,Ts}) -> +ltype({type,Line,T,Ts}, _) -> + simple_type({atom,Line,T}, Ts); +ltype({user_type,Line,T,Ts}, _) -> simple_type({atom,Line,T}, Ts); -ltype({remote_type,Line,[M,F,Ts]}) -> +ltype({remote_type,Line,[M,F,Ts]}, _) -> simple_type({remote,Line,M,F}, Ts); -ltype({atom,_,T}) -> - leaf(write(T)); -ltype(E) -> - lexpr(E, 0, options(none)). +ltype({atom,_,T}, _) -> + {atom,T}; +ltype(E, P) -> + lexpr(E, P, options(none)). binary_type(I1, I2) -> B = [[] || {integer,_,0} <- [I1]] =:= [], @@ -297,44 +366,38 @@ map_type(Fs) -> {first,[$#],map_pair_types(Fs)}. map_pair_types(Fs) -> - tuple_type(Fs, fun map_pair_type/1). + tuple_type(Fs, fun map_pair_type/2). -map_pair_type({type,_Line,map_field_assoc,Ktype,Vtype}) -> - {seq,[],[]," =>",[ltype(Ktype),ltype(Vtype)]}. +map_pair_type({type,_Line,map_field_assoc,[KType,VType]}, Prec) -> + {list,[{cstep,[ltype(KType, Prec),leaf(" =>")],ltype(VType, Prec)}]}; +map_pair_type({type,_Line,map_field_exact,[KType,VType]}, Prec) -> + {list,[{cstep,[ltype(KType, Prec),leaf(" :=")],ltype(VType, Prec)}]}. record_type(Name, Fields) -> {first,[record_name(Name)],field_types(Fields)}. field_types(Fs) -> - tuple_type(Fs, fun field_type/1). + tuple_type(Fs, fun field_type/2). -field_type({type,_Line,field_type,[Name,Type]}) -> +field_type({type,_Line,field_type,[Name,Type]}, _Prec) -> typed(lexpr(Name, options(none)), Type). -typed(B, {type,_,union,Ts}) -> - %% Special layout for :: followed by union. - {first,[B,$\s],{seq,[],[],[],union_type(Ts)}}; typed(B, Type) -> - {list,[{cstep,[B,' ::'],ltype(Type)}]}. - -union_type([T|Ts]) -> - [[leaf(":: "),ltype(T)] | ltypes(Ts, fun union_elem/1)]. - -union_elem(T) -> - [leaf(" | "),ltype(T)]. + {_L,_P,R} = type_inop_prec('::'), + {list,[{cstep,[B,' ::'],ltype(Type, R)}]}. tuple_type(Ts, F) -> - {seq,${,$},[$,],ltypes(Ts, F)}. + {seq,${,$},[$,],ltypes(Ts, F, 0)}. specattr(SpecKind, {FuncSpec,TypeSpecs}) -> Func = case FuncSpec of {F,_A} -> - format("~w", [F]); + {atom,F}; {M,F,_A} -> - format("~w:~w", [M, F]) + [{atom,M},$:,{atom,F}] end, {first,leaf(lists:concat(["-", SpecKind, " "])), - {list,[{first,leaf(Func),spec_clauses(TypeSpecs)}]}}. + {list,[{first,Func,spec_clauses(TypeSpecs)}]}}. spec_clauses(TypeSpecs) -> {prefer_nl,[$;],[sig_type(T) || T <- TypeSpecs]}. @@ -349,6 +412,9 @@ guard_type(Before, Gs) -> Gl = {list,[{step,'when',expr_list(Gs, [$,], fun constraint/2, Opts)}]}, {list,[{step,Before,Gl}]}. +constraint({type,_Line,constraint,[{atom,_,is_subtype},[{var,_,_}=V,Type]]}, + _Opts) -> + typed(lexpr(V, options(none)), Type); constraint({type,_Line,constraint,[Tag,As]}, _Opts) -> simple_type(Tag, As). @@ -361,19 +427,22 @@ type_args({type,_line,product,Ts}) -> targs(Ts). simple_type(Tag, Types) -> - {first,lexpr(Tag, 0, options(none)),targs(Types)}. + {first,lexpr(Tag, options(none)),targs(Types)}. targs(Ts) -> - {seq,$(,$),[$,],ltypes(Ts)}. + {seq,$(,$),[$,],ltypes(Ts, 0)}. -ltypes(Ts) -> - ltypes(Ts, fun ltype/1). +ltypes(Ts, Prec) -> + ltypes(Ts, fun ltype/2, Prec). -ltypes(Ts, F) -> - [F(T) || T <- Ts]. +ltypes(Ts, F, Prec) -> + [F(T, Prec) || T <- Ts]. attr(Name, Args) -> - call({var,0,format("-~s", [Name])}, Args, 0, options(none)). + {first,[$-,{atom,Name}],args(Args, options(none))}. + +attrib(Name, Args) -> + {first,[$-,{atom,Name}],[{seq,$(,$),[$,],Args}]}. pname(['' | As]) -> [$. | pname(As)]; @@ -385,9 +454,13 @@ pname(A) when is_atom(A) -> write(A). falist([]) -> - {nil,0}; -falist([{Name,Arity}|Falist]) -> - {cons,0,{var,0,format("~w/~w", [Name,Arity])},falist(Falist)}. + [leaf("[]")]; +falist(Falist) -> + L = [begin + {Name,Arity} = Fa, + [{atom,Name},leaf(format("/~w", [Arity]))] + end || Fa <- Falist], + [{seq,$[,$],$,,L}]. lfunction({function,_Line,Name,_Arity,Cs}, Opts) -> Cll = nl_clauses(fun (C, H) -> func_clause(Name, C, H) end, $;, Opts, Cs), @@ -399,19 +472,6 @@ func_clause(Name, {clause,Line,Head,Guard,Body}, Opts) -> Bl = body(Body, Opts), {step,Gl,Bl}. -lrule({rule,_Line,Name,_Arity,Cs}, Opts) -> - Cll = nl_clauses(fun (C, H) -> rule_clause(Name, C, H) end, $;, Opts, Cs), - [Cll,leaf(".\n")]. - -rule_clause(Name, {clause,Line,Head,Guard,Body}, Opts) -> - Hl = call({atom,Line,Name}, Head, 0, Opts), - Gl = guard_when(Hl, Guard, Opts, leaf(" :-")), - Bl = rule_body(Body, Opts), - {step,Gl,Bl}. - -rule_body(Es, Opts) -> - lc_quals(Es, Opts). - guard_when(Before, Guard, Opts) -> guard_when(Before, Guard, Opts, ' ->'). @@ -445,7 +505,7 @@ lexpr({var,_,V}, _, _) -> leaf(format("~ts", [V])); lexpr({char,_,C}, _, _) -> {char,C}; lexpr({integer,_,N}, _, _) -> leaf(write(N)); lexpr({float,_,F}, _, _) -> leaf(write(F)); -lexpr({atom,_,A}, _, _) -> leaf(write(A)); +lexpr({atom,_,A}, _, _) -> {atom,A}; lexpr({string,_,S}, _, _) -> {string,S}; lexpr({nil,_}, _, _) -> '[]'; lexpr({cons,_,H,T}, _, Opts) -> @@ -475,7 +535,7 @@ lexpr({record, _, Name, Fs}, Prec, Opts) -> lexpr({record_field, _, Rec, Name, F}, Prec, Opts) -> {L,P,R} = inop_prec('#'), Rl = lexpr(Rec, L, Opts), - Nl = leaf(format("#~w.", [Name])), + Nl = [$#,{atom,Name},$.], El = [Rl,Nl,lexpr(F, R, Opts)], maybe_paren(P, Prec, El); lexpr({record, _, Rec, Name, Fs}, Prec, Opts) -> @@ -494,12 +554,12 @@ lexpr({record_field, _, Rec, F}, Prec, Opts) -> maybe_paren(P, Prec, El); lexpr({map, _, Fs}, Prec, Opts) -> {P,_R} = preop_prec('#'), - El = {first,leaf("#"),map_fields(Fs, Opts)}, + El = {first,$#,map_fields(Fs, Opts)}, maybe_paren(P, Prec, El); lexpr({map, _, Map, Fs}, Prec, Opts) -> {L,P,_R} = inop_prec('#'), Rl = lexpr(Map, L, Opts), - El = {first,[Rl,leaf("#")],map_fields(Fs, Opts)}, + El = {first,[Rl,$#],map_fields(Fs, Opts)}, maybe_paren(P, Prec, El); lexpr({block,_,Es}, _, Opts) -> {list,[{step,'begin',body(Es, Opts)},'end']}; @@ -519,13 +579,16 @@ lexpr({'receive',_,Cs,To,ToOpt}, _, Opts) -> {step,'after',Al}, 'end']}; lexpr({'fun',_,{function,F,A}}, _Prec, _Opts) -> - leaf(format("fun ~w/~w", [F,A])); -lexpr({'fun',_,{function,F,A},Extra}, _Prec, _Opts) -> - {force_nl,fun_info(Extra),leaf(format("fun ~w/~w", [F,A]))}; -lexpr({'fun',_,{function,M,F,A}}, _Prec, _Opts) + [leaf("fun "),{atom,F},leaf(format("/~w", [A]))]; +lexpr({'fun',L,{function,_,_}=Func,Extra}, Prec, Opts) -> + {force_nl,fun_info(Extra),lexpr({'fun',L,Func}, Prec, Opts)}; +lexpr({'fun',L,{function,M,F,A}}, Prec, Opts) when is_atom(M), is_atom(F), is_integer(A) -> %% For backward compatibility with pre-R15 abstract format. - leaf(format("fun ~w:~w/~w", [M,F,A])); + Mod = erl_parse:abstract(M), + Fun = erl_parse:abstract(F), + Arity = erl_parse:abstract(A), + lexpr({'fun',L,{function,Mod,Fun,Arity}}, Prec, Opts); lexpr({'fun',_,{function,M,F,A}}, _Prec, Opts) -> %% New format in R15. NameItem = lexpr(M, Opts), @@ -542,8 +605,6 @@ lexpr({'fun',_,{clauses,Cs},Extra}, _Prec, Opts) -> lexpr({named_fun,_,Name,Cs,Extra}, _Prec, Opts) -> {force_nl,fun_info(Extra), {list,[{first,['fun', " "],fun_clauses(Cs, Opts, {named, Name})},'end']}}; -lexpr({'query',_,Lc}, _Prec, Opts) -> - {list,[{step,leaf("query"),lexpr(Lc, 0, Opts)},'end']}; lexpr({call,_,{remote,_,{atom,_,M},{atom,_,F}=N}=Name,Args}, Prec, Opts) -> case erl_internal:bif(M, F, length(Args)) of true -> @@ -616,7 +677,7 @@ lexpr({bin,_,Fs}, _, Opts) -> bit_grp(Fs, Opts); %% Special case for straight values. lexpr({value,_,Val}, _,_) -> - leaf(write(Val)); + {value,Val}; %% Now do the hook. lexpr(Other, _Precedence, #options{hook = none}) -> leaf(format("INVALID-FORM:~w:",[Other])); @@ -632,7 +693,7 @@ call(Name, Args, Prec, Opts) -> maybe_paren(P, Prec, Item). fun_info(Extra) -> - leaf(format("% fun-info: ~w", [Extra])). + [leaf("% fun-info: "),{value,Extra}]. %% BITS: @@ -673,7 +734,7 @@ bit_elem_type(T) -> %% end of BITS record_name(Name) -> - leaf(format("#~w", [Name])). + [$#,{atom,Name}]. record_fields(Fs, Opts) -> tuple(Fs, fun record_field/2, Opts). @@ -848,7 +909,7 @@ maybe_paren(_P, _Prec, Expr) -> Expr. leaf(S) -> - {leaf,chars_size(S),S}. + {leaf,string:length(S),S}. %%% Do the formatting. Currently nothing fancy. Could probably have %%% done it in one single pass. @@ -875,8 +936,10 @@ frmt(Item, I, PP) -> %%% - {force_nl,ExtraInfo,I}: fun-info (a comment) forces linebreak before I. %%% - {prefer_nl,Sep,IPs}: forces linebreak between Is unlesss negative %%% indentation. +%%% - {atom,A}: an atom %%% - {char,C}: a character %%% - {string,S}: a string. +%%% - {value,T}: a term. %%% - {hook,...}, {ehook,...}: hook expressions. %%% %%% list, first, seq, force_nl, and prefer_nl all accept IPs, where each @@ -906,7 +969,7 @@ f({seq,Before,After,Sep,LItems}, I0, ST, WT, PP) -> Sizes = BSizeL ++ SizeL, NSepChars = if is_list(Sep), Sep =/= [] -> - erlang:max(0, length(CharsL)-1); + erlang:max(0, length(CharsL)-1); % not string:length true -> 0 end, @@ -937,6 +1000,10 @@ f({prefer_nl,Sep,LItems}, I0, ST, WT, PP) -> true -> {insert_newlines(CharsSize2L, I0, ST),nsz(lists:last(Sizes), I0)} end; +f({value,V}, I, ST, WT, PP) -> + f(write_a_value(V, PP), I, ST, WT, PP); +f({atom,A}, I, ST, WT, PP) -> + f(write_an_atom(A, PP), I, ST, WT, PP); f({char,C}, I, ST, WT, PP) -> f(write_a_char(C, PP), I, ST, WT, PP); f({string,S}, I, ST, WT, PP) -> @@ -1058,7 +1125,7 @@ incr(I, Incr) -> I+Incr. indentation(E, I) when I < 0 -> - chars_size(E); + string:length(E); indentation(E, I0) -> I = io_lib_format:indentation(E, I0), case has_nl(E) of @@ -1075,6 +1142,12 @@ has_nl([C|Cs]) -> has_nl([]) -> false. +write_a_value(V, PP) -> + flat_leaf(write_value(V, PP)). + +write_an_atom(A, PP) -> + flat_leaf(write_atom(A, PP)). + write_a_char(C, PP) -> flat_leaf(write_char(C, PP)). @@ -1089,38 +1162,38 @@ write_a_string(S, I, PP) -> write_a_string([], _N, _Len, _PP) -> []; write_a_string(S, N, Len, PP) -> - SS = string:sub_string(S, 1, N), + SS = string:slice(S, 0, N), Sl = write_string(SS, PP), - case (length(Sl) > Len) and (N > ?MIN_SUBSTRING) of + case (string:length(Sl) > Len) and (N > ?MIN_SUBSTRING) of true -> write_a_string(S, N-1, Len, PP); false -> [flat_leaf(Sl) | - write_a_string(lists:nthtail(length(SS), S), Len, Len, PP)] + write_a_string(string:slice(S, string:length(SS)), Len, Len, PP)] end. flat_leaf(S) -> L = lists:flatten(S), - {leaf,length(L),L}. + {leaf,string:length(L),L}. + +write_value(V, PP) -> + (PP#pp.value_fun)(V). + +write_atom(A, PP) -> + (PP#pp.value_fun)(A). write_string(S, PP) -> - lists:flatten((PP#pp.string_fun)(S)). + (PP#pp.string_fun)(S). write_char(C, PP) -> - lists:flatten((PP#pp.char_fun)(C)). + (PP#pp.char_fun)(C). %% %% Utilities %% -chars_size([C | Es]) when is_integer(C) -> - 1 + chars_size(Es); -chars_size([E | Es]) -> - chars_size(E) + chars_size(Es); -chars_size([]) -> - 0; -chars_size(B) when is_binary(B) -> - byte_size(B). +a0() -> + erl_anno:new(0). -define(N_SPACES, 30). |