diff options
Diffstat (limited to 'lib/stdlib/src/erl_pp.erl')
| -rw-r--r-- | lib/stdlib/src/erl_pp.erl | 57 |
1 files changed, 41 insertions, 16 deletions
diff --git a/lib/stdlib/src/erl_pp.erl b/lib/stdlib/src/erl_pp.erl index ada3ff5de3..2630c60859 100644 --- a/lib/stdlib/src/erl_pp.erl +++ b/lib/stdlib/src/erl_pp.erl @@ -41,10 +41,11 @@ io_lib:chars())). -type(option() :: {hook, hook_function()} - | {encoding, latin1 | unicode | utf8}). + | {encoding, latin1 | unicode | utf8} + | {quote_singleton_atom_types, boolean()}). -type(options() :: hook_function() | [option()]). --record(pp, {value_fun, string_fun, char_fun}). +-record(pp, {value_fun, singleton_atom_type_fun, string_fun, char_fun}). -record(options, {hook, encoding, opts}). @@ -206,22 +207,43 @@ options(Hook) -> #options{hook = Hook, encoding = encoding([]), opts = Hook}. state(Options) when is_list(Options) -> + Quote = proplists:get_bool(quote_singleton_atom_types, Options), case encoding(Options) of - latin1 -> state(); - unicode -> unicode_state() + latin1 -> latin1_state(Quote); + unicode -> unicode_state(Quote) end; state(_Hook) -> - state(). + latin1_state(false). -state() -> +latin1_state(Quote) -> Options = [{encoding,latin1}], - #pp{value_fun = fun(V) -> io_lib_pretty:print(V, Options) end, + ValueFun = fun(V) -> io_lib_pretty:print(V, Options) end, + SingletonFun = + case Quote of + true -> + fun(A) -> + io_lib:write_string_as_latin1(atom_to_list(A), $') + end; %' + false -> + ValueFun + end, + #pp{value_fun = ValueFun, + singleton_atom_type_fun = SingletonFun, string_fun = fun io_lib:write_string_as_latin1/1, char_fun = fun io_lib:write_char_as_latin1/1}. -unicode_state() -> +unicode_state(Quote) -> Options = [{encoding,unicode}], - #pp{value_fun = fun(V) -> io_lib_pretty:print(V, Options) end, + ValueFun = fun(V) -> io_lib_pretty:print(V, Options) end, + SingletonFun = + case Quote of + true -> + fun(A) -> io_lib:write_string(atom_to_list(A), $') end; %' + false -> + ValueFun + end, + #pp{value_fun = ValueFun, + singleton_atom_type_fun = SingletonFun, string_fun = fun io_lib:write_string/1, char_fun = fun io_lib:write_char/1}. @@ -350,7 +372,7 @@ ltype({user_type,Line,T,Ts}, _) -> ltype({remote_type,Line,[M,F,Ts]}, _) -> simple_type({remote,Line,M,F}, Ts); ltype({atom,_,T}, _) -> - {atom,T}; + {singleton_atom_type,T}; ltype(E, P) -> lexpr(E, P, options(none)). @@ -808,12 +830,6 @@ cr_clause({clause,_,[T],G,B}, Opts) -> try_clauses(Cs, Opts) -> clauses(fun try_clause/2, Opts, Cs). -try_clause({clause,_,[{tuple,_,[{atom,_,throw},V,S]}],G,B}, Opts) -> - El = lexpr(V, 0, Opts), - Sl = stack_backtrace(S, [El], Opts), - Gl = guard_when(Sl, G, Opts), - Bl = body(B, Opts), - {step,Gl,Bl}; try_clause({clause,_,[{tuple,_,[C,V,S]}],G,B}, Opts) -> Cs = lexpr(C, 0, Opts), El = lexpr(V, 0, Opts), @@ -939,6 +955,7 @@ frmt(Item, I, PP) -> %%% - {prefer_nl,Sep,IPs}: forces linebreak between Is unlesss negative %%% indentation. %%% - {atom,A}: an atom +%%% - {singleton_atom_type,A}: an singleton atom type %%% - {char,C}: a character %%% - {string,S}: a string. %%% - {value,T}: a term. @@ -1006,6 +1023,8 @@ 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({singleton_atom_type,A}, I, ST, WT, PP) -> + f(write_a_singleton_atom_type(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) -> @@ -1150,6 +1169,9 @@ write_a_value(V, PP) -> write_an_atom(A, PP) -> flat_leaf(write_atom(A, PP)). +write_a_singleton_atom_type(A, PP) -> + flat_leaf(write_singleton_atom_type(A, PP)). + write_a_char(C, PP) -> flat_leaf(write_char(C, PP)). @@ -1184,6 +1206,9 @@ write_value(V, PP) -> write_atom(A, PP) -> (PP#pp.value_fun)(A). +write_singleton_atom_type(A, PP) -> + (PP#pp.singleton_atom_type_fun)(A). + write_string(S, PP) -> (PP#pp.string_fun)(S). |