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authorAndreas Rumpf <rumpf_a@web.de>2016-07-27 14:59:28 +0200
committerAndreas Rumpf <rumpf_a@web.de>2016-07-28 20:23:24 +0200
commit471672fecc579b9453d3e756d3fa4f51a8e72b5e (patch)
tree30ed671929a59a68b65e8066fbc94a65013c1686 /lib/deprecated
parentf18ff6a033643dc861002b18124feafb52cedfd3 (diff)
downloadNim-471672fecc579b9453d3e756d3fa4f51a8e72b5e.tar.gz
fix: generic tuples instantiations were cached incorrectly
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//: Support literal non-integers.

:(scenarios load)
:(scenario noninteger_literal)
recipe main [
  1:number <- copy 3.14159
]
+parse:   ingredient: {"3.14159": "literal-number"}

:(after "Parsing reagent(string s)")
if (is_noninteger(s)) {
  name = s;
  type = new type_tree(0);
  properties.push_back(pair<string, string_tree*>(name, new string_tree("literal-number")));
  set_value(to_double(s));
  return;
}

:(code)
bool is_noninteger(const string& s) {
  return s.find_first_not_of("0123456789-.") == string::npos
      && s.find_first_of    ("0123456789-") != string::npos
      && std::count(s.begin(), s.end(), '.') == 1;
}

double to_double(string n) {
  char* end = NULL;
  // safe because string.c_str() is guaranteed to be null-terminated
  double result = strtod(n.c_str(), &end);
  assert(*end == '\0');
  return result;
}

void test_is_noninteger() {
  CHECK(!is_noninteger("1234"));
  CHECK(!is_noninteger("1a2"));
  CHECK(is_noninteger("234.0"));
  CHECK(!is_noninteger("..."));
  CHECK(!is_noninteger("."));
  CHECK(is_noninteger("2."));
  CHECK(is_noninteger(".2"));
}