本文整理汇总了C++中parser::parse_small_nat方法的典型用法代码示例。如果您正苦于以下问题：C++ parser::parse_small_nat方法的具体用法？C++ parser::parse_small_nat怎么用？C++ parser::parse_small_nat使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类parser的用法示例。
在下文中一共展示了parser::parse_small_nat方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: parse_precedence_core
static unsigned parse_precedence_core(parser & p) {
auto pos = p.pos();
if (p.curr_is_numeral()) {
return p.parse_small_nat();
} else {
environment env = p.env();
env = open_prec_aliases(env);
parser::local_scope scope(p, env);
expr pre_val = p.parse_expr(get_max_prec());
pre_val = mk_typed_expr(mk_constant(get_num_name()), pre_val);
expr val = std::get<0>(p.elaborate(pre_val, list<expr>()));
val = normalize(p.env(), val);
if (optional<mpz> mpz_val = to_num_core(val)) {
if (!mpz_val->is_unsigned_int())
throw parser_error("invalid 'precedence', argument does not fit in a machine integer", pos);
return mpz_val->get_unsigned_int();
} else {
throw parser_error("invalid 'precedence', argument does not evaluate to a numeral", pos);
}
}
}示例2: set_option_cmd
environment set_option_cmd(parser & p) {
auto id_pos = p.pos();
name id = p.check_id_next("invalid set option, identifier (i.e., option name) expected");
auto decl_it = get_option_declarations().find(id);
if (decl_it == get_option_declarations().end()) {
// add "lean" prefix
name lean_id = name("lean") + id;
decl_it = get_option_declarations().find(lean_id);
if (decl_it == get_option_declarations().end()) {
throw parser_error(sstream() << "unknown option '" << id << "', type 'help options.' for list of available options", id_pos);
} else {
id = lean_id;
}
}
option_kind k = decl_it->second.kind();
if (k == BoolOption) {
if (p.curr_is_token_or_id(g_true))
p.set_option(id, true);
else if (p.curr_is_token_or_id(g_false))
p.set_option(id, false);
else
throw parser_error("invalid Boolean option value, 'true' or 'false' expected", p.pos());
p.next();
} else if (k == StringOption) {
if (!p.curr_is_string())
throw parser_error("invalid option value, given option is not a string", p.pos());
p.set_option(id, p.get_str_val());
p.next();
} else if (k == DoubleOption) {
p.set_option(id, p.parse_double());
} else if (k == UnsignedOption || k == IntOption) {
p.set_option(id, p.parse_small_nat());
} else {
throw parser_error("invalid option value, 'true', 'false', string, integer or decimal value expected", p.pos());
}
p.updt_options();
return p.env();
}示例3: parse
void decl_attributes::parse(parser & p) {
buffer<char const *> attr_tokens;
get_attribute_tokens(attr_tokens);
while (true) {
auto pos = p.pos();
if (auto it = parse_priority(p)) {
m_prio = *it;
bool has_prio_attr = false;
for (auto const & entry : m_entries) {
if (get_attribute_kind(entry.m_attr.c_str()) == attribute_kind::Prioritized) {
has_prio_attr = true;
break;
}
}
if (!has_prio_attr) {
throw parser_error("invalid '[priority]' attribute, declaration has not been marked with a prioritized attribute", pos);
}
} else if (p.curr_is_token(get_parsing_only_tk())) {
if (!m_is_abbrev)
throw parser_error("invalid '[parsing_only]' attribute, only abbreviations can be "
"marked as '[parsing_only]'", pos);
m_parsing_only = true;
p.next();
} else {
bool found = false;
for (char const * tk : attr_tokens) {
if (p.curr_is_token(tk)) {
p.next();
char const * attr = get_attribute_from_token(tk);
for (auto const & entry : m_entries) {
if (are_incompatible(entry.m_attr.c_str(), attr)) {
throw parser_error(sstream() << "invalid attribute [" << attr
<< "], declaration was already marked with [" << entry.m_attr << "]", pos);
}
}
switch (get_attribute_kind(attr)) {
case attribute_kind::Default:
case attribute_kind::Prioritized:
m_entries = cons(entry(attr), m_entries);
break;
case attribute_kind::Parametric: {
unsigned v = p.parse_small_nat();
if (v == 0)
throw parser_error("invalid attribute parameter, value must be positive", pos);
p.check_token_next(get_rbracket_tk(), "invalid attribute, ']' expected");
m_entries = cons(entry(attr, v-1), m_entries);
break;
}
case attribute_kind::OptParametric:
if (!p.curr_is_token(get_rbracket_tk())) {
unsigned v = p.parse_small_nat();
if (v == 0)
throw parser_error("invalid attribute parameter, value must be positive", pos);
p.check_token_next(get_rbracket_tk(), "invalid attribute, ']' expected");
m_entries = cons(entry(attr, v-1), m_entries);
} else {
p.check_token_next(get_rbracket_tk(), "invalid attribute, ']' expected");
m_entries = cons(entry(attr), m_entries);
}
break;
case attribute_kind::MultiParametric: {
buffer<unsigned> vs;
while (true) {
unsigned v = p.parse_small_nat();
if (v == 0)
throw parser_error("invalid attribute parameter, value must be positive", pos);
vs.push_back(v-1);
if (p.curr_is_token(get_rbracket_tk()))
break;
}
p.next();
m_entries = cons(entry(attr, to_list(vs)), m_entries);
break;
}
}
found = true;
break;
}
}
if (!found)
break;
}
}
}