Fix #10837 crash/hang in expandTemplate (#5410)

Author: chrchr-github

lib/templatesimplifier.cpp

@@ -499,7 +499,7 @@ unsigned int TemplateSimplifier::templateParameters(const Token *tok)
             return 0;
 
         // num/type ..
-        if (!tok->isNumber() && tok->tokType() != Token::eChar && !tok->isName() && !tok->isOp())
+        if (!tok->isNumber() && tok->tokType() != Token::eChar && tok->tokType() != Token::eString && !tok->isName() && !tok->isOp())
             return 0;
         tok = tok->next();
         if (!tok)

test/testsimplifytemplate.cpp

@@ -5319,6 +5319,7 @@ class TestSimplifyTemplate : public TestFixture {
         ASSERT_EQUALS(3U, templateParameters("template <class T, class... Args, class Tup = std::tuple<Args*...>> void f() {}"));
         ASSERT_EQUALS(1U, templateParameters("S<4 < sizeof(uintptr_t)> x;"));
         ASSERT_EQUALS(2U, templateParameters("template <typename... Ts, typename = std::enable_if_t<std::is_same<Ts..., int>::value>> void g() {}")); // #11915
+        ASSERT_EQUALS(1U, templateParameters("S<N::M<O<\"A\"_I>>> s;")); // #10837
     }
 
     // Helper function to unit test TemplateSimplifier::getTemplateNamePosition