Remove whitespace sensitivity for * and &

Undo commit 30c79a0

Updates comment on partly-related #152
Closes #319
Closes #989

Author: hsutter

regression-tests/mixed-test-parens.cpp2

@@ -6,8 +6,12 @@ auto f(auto, auto) -> void { }
 constexpr int a = 1;
 
 main: () -> int = {
+    p := new<int>(11);
+    std::cout << p * << "\n";
+
     v : std::vector<int> = ( 1, 2, 3 );
-    std::cout << (1+2) * (3+v[0]);
+    std::cout << (1+2)*(3+v[0]);
+    std::cout << "\n13*14 is (13*14)$\n";
     f<(1>2)>(3,4);
     f< a+a >(5,6);
 }

regression-tests/test-results/clang-12/mixed-test-parens.cpp.execution

@@ -1 +1,3 @@
-12
+11
+12
+13*14 is 182

regression-tests/test-results/gcc-10/mixed-test-parens.cpp.execution

@@ -1 +1,3 @@
-12
+11
+12
+13*14 is 182

regression-tests/test-results/gcc-13/mixed-test-parens.cpp.execution

@@ -1 +1,3 @@
-12
+11
+12
+13*14 is 182

regression-tests/test-results/mixed-test-parens.cpp

@@ -27,8 +27,12 @@ constexpr int a = 1;
 
 #line 8 "mixed-test-parens.cpp2"
 [[nodiscard]] auto main() -> int{
+    auto p {cpp2_new<int>(11)}; 
+    std::cout << *cpp2::impl::assert_not_null(cpp2::move(p)) << "\n";
+
     std::vector<int> v {1, 2, 3}; 
     std::cout << (1 + 2) * (3 + CPP2_ASSERT_IN_BOUNDS_LITERAL(cpp2::move(v), 0));
+    std::cout << ("\n13*14 is " + cpp2::to_string(13 * 14) + "\n");
     f<(cpp2::impl::cmp_greater(1,2))>(3, 4);
     f<a + a>(5, 6);
 }

regression-tests/test-results/msvc-2022/mixed-test-parens.cpp.execution

@@ -1 +1,3 @@
-12
+11
+12
+13*14 is 182

source/parse.h

@@ -5771,7 +5771,7 @@ class parser
 
     //G postfix-expression:
     //G     primary-expression
-    //G     postfix-expression postfix-operator     // Note: without whitespace before the operator
+    //G     postfix-expression postfix-operator
     //G     postfix-expression '[' expression-list? ','? ']'
     //G     postfix-expression '(' expression-list? ','? ')'
     //G     postfix-expression '.' id-expression
@@ -5788,23 +5788,18 @@ class parser
         while (
             !done()
             && (
-                (is_postfix_operator(curr().type())
-                    //  Postfix operators must be lexically adjacent
-                    && curr().position().lineno == peek(-1)->position().lineno
-                    && curr().position().colno == peek(-1)->position().colno + peek(-1)->length()
-                )
+                is_postfix_operator(curr().type())
                 || curr().type() == lexeme::LeftBracket
                 || curr().type() == lexeme::LeftParen
                 || curr().type() == lexeme::Dot
             )
             )
         {
-            //  these can't be unary operators if followed by a (, identifier, or literal
+            //  * and & can't be unary operators if followed by a (, identifier, or literal
             if (
                 (
                     curr().type() == lexeme::Multiply
                     || curr().type() == lexeme::Ampersand
-                    || curr().type() == lexeme::Tilde
                     )
                 && peek(1)
                 && (
@@ -5814,18 +5809,6 @@ class parser
                     )
                 )
             {
-                auto op  = curr().to_string();
-                auto msg = "postfix unary " + op;
-                if      (curr().type() == lexeme::Multiply ) { msg += " (dereference)"          ; }
-                else if (curr().type() == lexeme::Ampersand) { msg += " (address-of)"           ; }
-                else if (curr().type() == lexeme::Tilde    ) { msg += " (unary bit-complement)" ; }
-                msg += " cannot be immediately followed by a (, identifier, or literal - add whitespace before "
-                    + op + " here if you meant binary " + op;
-                if      (curr().type() == lexeme::Multiply ) { msg += " (multiplication)"       ; }
-                else if (curr().type() == lexeme::Ampersand) { msg += " (bitwise and)"          ; }
-                else if (curr().type() == lexeme::Tilde    ) { msg += " (binary bit-complement)"; }
-
-                error(msg, false);
                 break;
             }