fix: don't handle TOKEN_ERROR as trivial tokens. (#159)

* fix: don't handle TOKEN_ERROR as trivial tokens.

Instead handle them and fail during parsing. The parser produces an error which also indicates which token would be expected instead

* add: one more testcase; bare_tilde

src/kinds.rs

@@ -131,6 +131,6 @@ impl SyntaxKind {
     /// Returns true if this token is a comment, whitespace, or similar, and
     /// should be skipped over by the parser.
     pub fn is_trivia(self) -> bool {
-        matches!(self, TOKEN_COMMENT | TOKEN_ERROR | TOKEN_WHITESPACE)
+        matches!(self, TOKEN_COMMENT | TOKEN_WHITESPACE)
     }
 }

test_data/parser/error/path_bare_tilde.expect

@@ -0,0 +1,5 @@
+error: unexpected TOKEN_ERROR at 0..1, wanted any of [TOKEN_L_PAREN, TOKEN_REC, TOKEN_L_BRACE, TOKEN_L_BRACK, TOKEN_STRING_START, TOKEN_IDENT]
+[email protected]
+  [email protected]
+    [email protected] "~"
+

test_data/parser/error/path_bare_tilde.nix

@@ -0,0 +1 @@
+~

test_data/parser/error/path_interp_trailing_slash.expect

@@ -0,0 +1,12 @@
+error: unexpected token at 8..9
+[email protected]
+  [email protected]
+    [email protected] "./"
+    [email protected]
+      [email protected] "${"
+      [email protected]
+        [email protected] "foo"
+      [email protected] "}"
+  [email protected]
+    [email protected] "/"
+

test_data/parser/error/path_interp_trailing_slash.nix

@@ -0,0 +1 @@
+./${foo}/

test_data/parser/error/path_tilde.expect

@@ -0,0 +1,5 @@
+error: unexpected TOKEN_ERROR at 0..2, wanted any of [TOKEN_L_PAREN, TOKEN_REC, TOKEN_L_BRACE, TOKEN_L_BRACK, TOKEN_STRING_START, TOKEN_IDENT]
+[email protected]
+  [email protected]
+    [email protected] "~p"
+

test_data/parser/error/path_tilde.nix

@@ -0,0 +1 @@
+~p

test_data/parser/error/path_tilde_slash.expect

@@ -0,0 +1,5 @@
+error: unexpected TOKEN_ERROR at 0..2, wanted any of [TOKEN_L_PAREN, TOKEN_REC, TOKEN_L_BRACE, TOKEN_L_BRACK, TOKEN_STRING_START, TOKEN_IDENT]
+[email protected]
+  [email protected]
+    [email protected] "~/"
+

test_data/parser/error/path_tilde_slash.nix

@@ -0,0 +1 @@
+~/

test_data/parser/error/path_trailing_slash.expect

@@ -0,0 +1,5 @@
+error: unexpected TOKEN_ERROR at 0..3, wanted any of [TOKEN_L_PAREN, TOKEN_REC, TOKEN_L_BRACE, TOKEN_L_BRACK, TOKEN_STRING_START, TOKEN_IDENT]
+[email protected]
+  [email protected]
+    [email protected] "/a/"
+

test_data/parser/error/path_trailing_slash.nix

@@ -0,0 +1 @@
+/a/