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feat(util/sexpr/format): small change

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The idea is to avoid unnecessary memory allocations.
It may also help with the lean.js problem we are fighting with.
This commit is contained in:
Leonardo de Moura 2015-06-19 21:21:28 -07:00
parent c6ad37a651
commit d28c26b6eb
1 changed files with 4 additions and 1 deletions
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5
src/util/sexpr/format.cpp
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@ -100,6 +100,7 @@ static format * g_rcurly = nullptr;
static format * g_comma = nullptr;
static format * g_colon = nullptr;
static format * g_dot = nullptr;
static sexpr * g_sexpr_space = nullptr;
format const & line() { return *g_line; }
format const & space() { return *g_space; }
format const & lp() { return *g_lp; }
@ -137,7 +138,7 @@ sexpr format::flatten(sexpr const & s) {
return flatten(sexpr_choice_1(s));
case format_kind::LINE:
g_diff_flatten = true;
return sexpr_text(sexpr(" "));
return *g_sexpr_space;
case format_kind::FLAT_COMPOSE:
case format_kind::TEXT:
case format_kind::COLOR_BEGIN:
@ -520,9 +521,11 @@ void initialize_format() {
g_comma = new format(",");
g_colon = new format(":");
g_dot = new format(".");
g_sexpr_space = new sexpr(sexpr(format::format_kind::TEXT), " ");
}
void finalize_format() {
delete g_sexpr_space;
delete g_line;
delete g_space;
delete g_lp;