Add hint for Cpp1 new expression

Author: ntrel

regression-tests/pure2-new-expression-error.cpp2

@@ -0,0 +1,4 @@
+main: () = 
+{
+    v := new int;
+}

regression-tests/test-results/pure2-new-expression-error.cpp2.output

@@ -0,0 +1,3 @@
+pure2-new-expression-error.cpp2...
+pure2-new-expression-error.cpp2(3,14): error: use 'new<T>', not 'new T' (at 'int')
+

source/parse.h

@@ -4092,6 +4092,14 @@ class parser
                         generated_tokens->emplace_back( ">>=", t.position(), lexeme::RightShiftEq);
                         return &generated_tokens->back();
                     }
+                    if (
+                        peek(-1)->type() == lexeme::Identifier
+                        && peek(-1)->as_string_view() == "new"
+                        && next.type() != lexeme::Less
+                        )
+                    {
+                        error("use 'new<T>', not 'new T'");
+                    }
                     return nullptr;
                 },
                 [=,this]{ return logical_or_expression(allow_angle_operators); }