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authorBjörn Gustavsson <[email protected]>2016-04-26 06:47:22 +0200
committerBjörn Gustavsson <[email protected]>2016-04-28 12:14:17 +0200
commitc42c535cf4f16a7baa0c8839608a446f184e9901 (patch)
tree42647ec747d5b240c9b7205a6b5f1d66dfce03c6 /lib
parenta3ec2644f58d8cfeca0240929d44885ff7a517fa (diff)
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Slightly optimize core_pp
Diffstat (limited to 'lib')
-rw-r--r--lib/compiler/src/core_pp.erl54
1 files changed, 32 insertions, 22 deletions
diff --git a/lib/compiler/src/core_pp.erl b/lib/compiler/src/core_pp.erl
index 88275998be..f34a5c034f 100644
--- a/lib/compiler/src/core_pp.erl
+++ b/lib/compiler/src/core_pp.erl
@@ -37,10 +37,11 @@
indent = 0 :: integer(),
item_indent = 2 :: integer(),
body_indent = 4 :: integer(),
- tab_width = 8 :: non_neg_integer(),
line = 0 :: integer(),
clean = true :: boolean()}).
+-define(TAB_WIDTH, 8).
+
-spec format(cerl:cerl()) -> iolist().
format(Node) ->
@@ -470,37 +471,46 @@ format_map_pair(Op, K, V, Ctxt0) ->
Ctxt2 = add_indent(Ctxt0, width(Txt, Ctxt1)),
[Txt,Op,format(V, Ctxt2)].
-indent(Ctxt) -> indent(Ctxt#ctxt.indent, Ctxt).
-
-indent(N, _) when N =< 0 -> "";
-indent(N, Ctxt) ->
- T = Ctxt#ctxt.tab_width,
- string:chars($\t, N div T, string:chars($\s, N rem T)).
+indent(#ctxt{indent=N}) ->
+ if
+ N =< 0 ->
+ "";
+ true ->
+ string:chars($\t, N div ?TAB_WIDTH, spaces(N rem ?TAB_WIDTH))
+ end.
nl_indent(Ctxt) -> [$\n|indent(Ctxt)].
+spaces(0) -> "";
+spaces(1) -> " ";
+spaces(2) -> " ";
+spaces(3) -> " ";
+spaces(4) -> " ";
+spaces(5) -> " ";
+spaces(6) -> " ";
+spaces(7) -> " ".
unindent(T, Ctxt) ->
- unindent(T, Ctxt#ctxt.indent, Ctxt, []).
+ unindent(T, Ctxt#ctxt.indent, []).
-unindent(T, N, _, C) when N =< 0 ->
+unindent(T, N, C) when N =< 0 ->
[T|C];
-unindent([$\s|T], N, Ctxt, C) ->
- unindent(T, N - 1, Ctxt, C);
-unindent([$\t|T], N, Ctxt, C) ->
- Tab = Ctxt#ctxt.tab_width,
+unindent([$\s|T], N, C) ->
+ unindent(T, N - 1, C);
+unindent([$\t|T], N, C) ->
+ Tab = ?TAB_WIDTH,
if N >= Tab ->
- unindent(T, N - Tab, Ctxt, C);
+ unindent(T, N - Tab, C);
true ->
- unindent([string:chars($\s, Tab - N)|T], 0, Ctxt, C)
+ unindent([spaces(Tab - N)|T], 0, C)
end;
-unindent([L|T], N, Ctxt, C) when is_list(L) ->
- unindent(L, N, Ctxt, [T|C]);
-unindent([H|T], _, _, C) ->
+unindent([L|T], N, C) when is_list(L) ->
+ unindent(L, N, [T|C]);
+unindent([H|T], _, C) ->
[H|[T|C]];
-unindent([], N, Ctxt, [H|T]) ->
- unindent(H, N, Ctxt, T);
-unindent([], _, _, []) -> [].
+unindent([], N, [H|T]) ->
+ unindent(H, N, T);
+unindent([], _, []) -> [].
width(Txt, Ctxt) ->
@@ -509,7 +519,7 @@ width(Txt, Ctxt) ->
end.
width([$\t|T], A, Ctxt, C) ->
- width(T, A + Ctxt#ctxt.tab_width, Ctxt, C);
+ width(T, A + ?TAB_WIDTH, Ctxt, C);
width([$\n|T], _, Ctxt, C) ->
width(unindent([T|C], Ctxt), Ctxt);
width([H|T], A, Ctxt, C) when is_list(H) ->