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authorBjörn Gustavsson <[email protected]>2015-01-30 15:43:41 +0100
committerBjörn Gustavsson <[email protected]>2015-01-30 15:51:52 +0100
commitf667931e2905797ffab63e224e56eaf07f77178a (patch)
treee202cad143ed4ecb5b2f0b2bad14292ea172890f /lib
parente4a8ab7530d340249c09ca7f27b0120f55b8354a (diff)
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Make the syntax for map pairs readable
Use the same syntax for map pairs in Core Erlang code as in the Erlang Code. This Erlang code: M#{x:=42,y=>1} will look like this in Core Erlang: ~{'x':=42,'y'=>1|M}~
Diffstat (limited to 'lib')
-rw-r--r--lib/compiler/src/core_parse.yrl16
-rw-r--r--lib/compiler/src/core_pp.erl14
-rw-r--r--lib/compiler/src/core_scan.erl6
-rw-r--r--lib/compiler/test/core_SUITE_data/map_core_test.core12
4 files changed, 23 insertions, 25 deletions
diff --git a/lib/compiler/src/core_parse.yrl b/lib/compiler/src/core_parse.yrl
index 849f801a11..8bdb6bc37d 100644
--- a/lib/compiler/src/core_parse.yrl
+++ b/lib/compiler/src/core_parse.yrl
@@ -58,7 +58,8 @@ Terminals
%% Separators
-'(' ')' '{' '}' '[' ']' '|' ',' '->' '=' '/' '<' '>' ':' '-|' '#' '~' '::'
+'(' ')' '{' '}' '[' ']' '|' ',' '->' '=' '/' '<' '>' ':' '-|' '#'
+'~' '=>' ':='
%% Keywords (atoms are assumed to always be single-quoted).
@@ -189,8 +190,9 @@ map_pattern -> '~' '{' map_pair_patterns '}' '~' :
map_pair_patterns -> map_pair_pattern : ['$1'].
map_pair_patterns -> map_pair_pattern ',' map_pair_patterns : ['$1' | '$3'].
-map_pair_pattern -> '~' '<' anno_expression ',' anno_pattern '>' :
- #c_map_pair{op=#c_literal{val=exact},key='$3',val='$5'}.
+map_pair_pattern -> anno_expression ':=' anno_pattern :
+ #c_map_pair{op=#c_literal{val=exact},
+ key='$1',val='$3'}.
cons_pattern -> '[' anno_pattern tail_pattern :
c_cons('$2', '$3').
@@ -295,10 +297,10 @@ map_pairs -> map_pair ',' map_pairs : ['$1' | '$3'].
map_pair -> map_pair_assoc : '$1'.
map_pair -> map_pair_exact : '$1'.
-map_pair_assoc -> '::' '<' anno_expression ',' anno_expression'>' :
- #c_map_pair{op=#c_literal{val=assoc},key='$3',val='$5'}.
-map_pair_exact -> '~' '<' anno_expression ',' anno_expression'>' :
- #c_map_pair{op=#c_literal{val=exact},key='$3',val='$5'}.
+map_pair_assoc -> anno_expression '=>' anno_expression :
+ #c_map_pair{op=#c_literal{val=assoc},key='$1',val='$3'}.
+map_pair_exact -> anno_expression ':=' anno_expression :
+ #c_map_pair{op=#c_literal{val=exact},key='$1',val='$3'}.
cons -> '[' anno_expression tail : c_cons('$2', '$3').
diff --git a/lib/compiler/src/core_pp.erl b/lib/compiler/src/core_pp.erl
index 01922c3fdf..662ef6c83f 100644
--- a/lib/compiler/src/core_pp.erl
+++ b/lib/compiler/src/core_pp.erl
@@ -183,15 +183,9 @@ format_1(#c_map{arg=Var,es=Es}, Ctxt) ->
"}~"
];
format_1(#c_map_pair{op=#c_literal{val=assoc},key=K,val=V}, Ctxt) ->
- ["::<",
- format_map_pair(K, V, Ctxt),
- ">"
- ];
+ format_map_pair("=>", K, V, Ctxt);
format_1(#c_map_pair{op=#c_literal{val=exact},key=K,val=V}, Ctxt) ->
- ["~<",
- format_map_pair(K, V, Ctxt),
- ">"
- ];
+ format_map_pair(":=", K, V, Ctxt);
format_1(#c_cons{hd=H,tl=T}, Ctxt) ->
Txt = ["["|format(H, add_indent(Ctxt, 1))],
[Txt|format_list_tail(T, add_indent(Ctxt, width(Txt, Ctxt)))];
@@ -448,11 +442,11 @@ format_list_tail(#c_cons{anno=[],hd=H,tl=T}, Ctxt) ->
format_list_tail(Tail, Ctxt) ->
["|",format(Tail, add_indent(Ctxt, 1)),"]"].
-format_map_pair(K, V, Ctxt0) ->
+format_map_pair(Op, K, V, Ctxt0) ->
Ctxt1 = add_indent(Ctxt0, 1),
Txt = format(K, set_class(Ctxt1, expr)),
Ctxt2 = add_indent(Ctxt0, width(Txt, Ctxt1)),
- [Txt,",",format(V, Ctxt2)].
+ [Txt,Op,format(V, Ctxt2)].
indent(Ctxt) -> indent(Ctxt#ctxt.indent, Ctxt).
diff --git a/lib/compiler/src/core_scan.erl b/lib/compiler/src/core_scan.erl
index b7799b373a..8ab20b1982 100644
--- a/lib/compiler/src/core_scan.erl
+++ b/lib/compiler/src/core_scan.erl
@@ -271,8 +271,10 @@ scan1("->" ++ Cs, Toks, Pos) ->
scan1(Cs, [{'->',Pos}|Toks], Pos);
scan1("-|" ++ Cs, Toks, Pos) ->
scan1(Cs, [{'-|',Pos}|Toks], Pos);
-scan1("::" ++ Cs, Toks, Pos) ->
- scan1(Cs, [{'::',Pos}|Toks], Pos);
+scan1(":=" ++ Cs, Toks, Pos) ->
+ scan1(Cs, [{':=',Pos}|Toks], Pos);
+scan1("=>" ++ Cs, Toks, Pos) ->
+ scan1(Cs, [{'=>',Pos}|Toks], Pos);
scan1([C|Cs], Toks, Pos) -> %Punctuation character
P = list_to_atom([C]),
scan1(Cs, [{P,Pos}|Toks], Pos);
diff --git a/lib/compiler/test/core_SUITE_data/map_core_test.core b/lib/compiler/test/core_SUITE_data/map_core_test.core
index 2aa853d450..a75f6cf24f 100644
--- a/lib/compiler/test/core_SUITE_data/map_core_test.core
+++ b/lib/compiler/test/core_SUITE_data/map_core_test.core
@@ -7,11 +7,11 @@ module 'map_core_test' ['map_core_test'/0,
fun () ->
let <_cor0> =
%% Line 15
- ~{::<'check','ok'>,::<1337,#{#<104>(8,1,'integer',['unsigned'|['big']]),
+ ~{'check'=>'ok',1337=>#{#<104>(8,1,'integer',['unsigned'|['big']]),
#<101>(8,1,'integer',['unsigned'|['big']]),
#<108>(8,1,'integer',['unsigned'|['big']]),
#<108>(8,1,'integer',['unsigned'|['big']]),
- #<111>(8,1,'integer',['unsigned'|['big']])}#>,::<'val',0>}~
+ #<111>(8,1,'integer',['unsigned'|['big']])}#,'val'=>0}~
in let <M> =
%% Line 15
apply 'id'/1
@@ -23,7 +23,7 @@ module 'map_core_test' ['map_core_test'/0,
in %% Line 16
case apply 'call'/2
(M, _cor2) of
- <~{~<1337,#{#<104>(8,1,'integer',['unsigned'|['big']]),
+ <~{1337:=#{#<104>(8,1,'integer',['unsigned'|['big']]),
#<101>(8,1,'integer',['unsigned'|['big']]),
#<108>(8,1,'integer',['unsigned'|['big']]),
#<108>(8,1,'integer',['unsigned'|['big']]),
@@ -39,7 +39,7 @@ module 'map_core_test' ['map_core_test'/0,
#<32>(8,1,'integer',['unsigned'|['big']]),
#<53>(8,1,'integer',['unsigned'|['big']]),
#<32>(8,1,'integer',['unsigned'|['big']]),
- #<54>(8,1,'integer',['unsigned'|['big']])}#>,~<'check','ok'>,~<'val',21>}~> when 'true' ->
+ #<54>(8,1,'integer',['unsigned'|['big']])}#,'check':='ok','val':=21}~> when 'true' ->
%% Line 17
'ok'
( <_cor3> when 'true' ->
@@ -51,7 +51,7 @@ module 'map_core_test' ['map_core_test'/0,
%% Line 20
fun (_cor1,_cor0) ->
case <_cor1,_cor0> of
- <M = ~{~<1337,Bin>,~<'check',_cor8>,~<'val',Val>}~,[V|Vs]> when 'true' ->
+ <M = ~{1337:=Bin,'check':=_cor8,'val':=Val}~,[V|Vs]> when 'true' ->
let <_cor3> =
%% Line 21
call 'erlang':'+'
@@ -67,7 +67,7 @@ module 'map_core_test' ['map_core_test'/0,
(Val, V)
in let <_cor5> =
%% Line 21
- ~{~<1337,_cor4>,~<'val',_cor2>|M}~
+ ~{1337:=_cor4,'val':=_cor2|M}~
in %% Line 21
apply 'call'/2
(_cor5, Vs)