feat(classes): support ordinary member methods and this references

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

3 files changed, 90 insertions, 0 deletions

diff --git a/tests/iii/class-method-errors/case.json b/tests/iii/class-method-errors/case.json
new file mode 100644
index 0000000..655296d
--- /dev/null
+++ b/tests/iii/class-method-errors/case.json
@@ -0,0 +1,52 @@
+{
+  "errors": [
+    {
+      "reason": "Cannot redeclare this inside a method",
+      "line": 11
+    },
+    {
+      "reason": "A method parameter cannot be named this",
+      "line": 13
+    },
+    {
+      "reason": "NEW constructors are not implemented",
+      "line": 15
+    },
+    {
+      "reason": "Duplicate member set in class Box",
+      "line": 17
+    },
+    {
+      "reason": "Duplicate member Value in class Box",
+      "line": 19
+    },
+    {
+      "reason": "Cannot access private field Hidden of type Box",
+      "line": 25
+    },
+    {
+      "reason": "Cannot access private method Secret of type Box",
+      "line": 26
+    },
+    {
+      "reason": "Cannot access private method Secret of type Box",
+      "line": 30
+    },
+    {
+      "reason": "Cannot access private field Hidden of type Box",
+      "line": 31
+    },
+    {
+      "reason": "Incorrect # arguments passed to Box.Set",
+      "line": 32
+    },
+    {
+      "reason": "Type Box has no method Missing",
+      "line": 33
+    },
+    {
+      "reason": "Type INTEGER has no method Set",
+      "line": 35
+    }
+  ]
+}
diff --git a/tests/iii/class-method-errors/notes.md b/tests/iii/class-method-errors/notes.md
new file mode 100644
index 0000000..f9be5b9
--- /dev/null
+++ b/tests/iii/class-method-errors/notes.md
@@ -0,0 +1,3 @@
+# class-method-errors
+
+Reject private access from outside the owning class, duplicate members, NEW constructors, redeclarations of this, incorrect arguments and invalid receivers.
diff --git a/tests/iii/class-method-errors/program.cps b/tests/iii/class-method-errors/program.cps
new file mode 100644
index 0000000..f2503e2
--- /dev/null
+++ b/tests/iii/class-method-errors/program.cps
@@ -0,0 +1,35 @@
+CLASS Box
+    PRIVATE Hidden : INTEGER
+    PUBLIC Value : INTEGER
+    PROCEDURE Set(Number : INTEGER)
+        Hidden <- Number
+    ENDPROCEDURE
+    PRIVATE FUNCTION Secret() RETURNS INTEGER
+        RETURN Hidden
+    ENDFUNCTION
+    PROCEDURE BadLocal()
+        DECLARE this : Box
+    ENDPROCEDURE
+    PROCEDURE BadParam(this : Box)
+    ENDPROCEDURE
+    PROCEDURE NEW()
+    ENDPROCEDURE
+    PROCEDURE set()
+    ENDPROCEDURE
+    FUNCTION Value() RETURNS INTEGER
+        RETURN 0
+    ENDFUNCTION
+ENDCLASS
+CLASS Stranger
+    PROCEDURE Probe(Other : Box)
+        OUTPUT Other.Hidden
+        OUTPUT Other.Secret()
+    ENDPROCEDURE
+ENDCLASS
+DECLARE B : Box
+OUTPUT B.Secret()
+OUTPUT B.Hidden
+B.Set()
+B.Missing()
+DECLARE Number : INTEGER
+Number.Set(1)