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feat(frontends/lean/parser): allow _ at level expressions

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This commit is contained in:
Leonardo de Moura 2014-10-01 10:19:35 -07:00
parent 3775d07d5f
commit 71077f5c89
3 changed files with 8 additions and 0 deletions
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3
src/frontends/lean/parser.cpp
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@ -528,6 +528,9 @@ level parser::parse_level_nud() {
return parse_max_imax(true);
} else if (curr_is_token_or_id(get_imax_tk())) {
return parse_max_imax(false);
} else if (curr_is_token_or_id(get_placeholder_tk())) {
next();
return mk_level_placeholder();
} else if (curr_is_token(get_lparen_tk())) {
next();
level l = parse_level();

4
src/frontends/lean/tokens.cpp
View file

@ -8,6 +8,7 @@ Author: Leonardo de Moura
namespace lean {
static name * g_period = nullptr;
static name * g_placeholder = nullptr;
static name * g_colon = nullptr;
static name * g_dcolon = nullptr;
static name * g_lparen = nullptr;
@ -86,6 +87,7 @@ static name * g_root = nullptr;
void initialize_tokens() {
g_period = new name(".");
g_placeholder = new name("_");
g_colon = new name(":");
g_dcolon = new name("::");
g_lparen = new name("(");
@ -239,10 +241,12 @@ void finalize_tokens() {
delete g_lparen;
delete g_colon;
delete g_dcolon;
delete g_placeholder;
delete g_period;
}
name const & get_period_tk() { return *g_period; }
name const & get_placeholder_tk() { return *g_placeholder; }
name const & get_colon_tk() { return *g_colon; }
name const & get_dcolon_tk() { return *g_dcolon; }
name const & get_lparen_tk() { return *g_lparen; }

1
src/frontends/lean/tokens.h
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@ -10,6 +10,7 @@ namespace lean {
void initialize_tokens();
void finalize_tokens();
name const & get_period_tk();
name const & get_placeholder_tk();
name const & get_colon_tk();
name const & get_dcolon_tk();
name const & get_lparen_tk();