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| author | Björn Gustavsson <[email protected]> | 2016-04-26 06:47:22 +0200 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2016-04-28 12:14:17 +0200 |
| commit | c42c535cf4f16a7baa0c8839608a446f184e9901 (patch) | |
| tree | 42647ec747d5b240c9b7205a6b5f1d66dfce03c6 /lib | |
| parent | a3ec2644f58d8cfeca0240929d44885ff7a517fa (diff) | |
| download | otp-c42c535cf4f16a7baa0c8839608a446f184e9901.tar.gz otp-c42c535cf4f16a7baa0c8839608a446f184e9901.tar.bz2 otp-c42c535cf4f16a7baa0c8839608a446f184e9901.zip | |
Slightly optimize core_pp
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/compiler/src/core_pp.erl | 54 |
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) -> |