Fix/fix peephole opt recipe parser

src/arch/z80/peephole/evaluator.py

@@ -2,7 +2,7 @@
 
 import re
 from collections.abc import Callable
-from enum import Enum, unique
+from enum import StrEnum, unique
 from typing import Any
 
 from src.api import utils
@@ -13,7 +13,7 @@
 
 
 @unique
-class FN(str, Enum):
+class FN(StrEnum):
     OP_NOT = "!"
     OP_PLUS = "+"
     OP_EQ = "=="
@@ -215,28 +215,31 @@ def eval(self, vars_: dict[str, Any] | None = None) -> str | Evaluator | list[An
             val = self.expression[0]
             if not isinstance(val, str):
                 return val
+
             if val == "$":
                 return val
+
             if not RE_SVAR.match(val):
                 return val
+
             if val not in vars_:
                 raise UnboundVarError(f"Unbound variable '{val}'")
+
             return vars_[val]
 
         if len(self.expression) == 2:
-            oper = self.expression[0]
+            oper = FN(self.expression[0])
             assert oper in UNARY
             operand = self.expression[1].eval(vars_)
-            # FIXME
-            return self.normalize(UNARY[oper](operand))  # type: ignore[index]
+            return self.normalize(UNARY[oper](operand))
 
         if len(self.expression) == 3 and self.expression[1] != FN.OP_COMMA:
-            assert self.expression[1] in BINARY
+            oper = FN(self.expression[1])
+            assert oper in BINARY
             # Do lazy evaluation
             left_ = lambda: self.expression[0].eval(vars_)
             right_ = lambda: self.expression[2].eval(vars_)
-            # FIXME
-            return self.normalize(BINARY[self.expression[1]](left_, right_))  # type: ignore[index]
+            return self.normalize(BINARY[oper](left_, right_))
 
         # It's a list
         return [x.eval(vars_) for i, x in enumerate(self.expression) if not i % 2]

src/arch/z80/peephole/parser.py

@@ -11,7 +11,7 @@
 TreeType = list[str | list["TreeType"]]
 
 COMMENT: Final[str] = ";;"
-RE_REGION = re.compile(r"([_a-zA-Z][a-zA-Z0-9]*)[ \t]*{{")
+RE_REGION = re.compile(r"([_a-zA-Z][a-zA-Z0-9]*)[ \t]*\{\{$")
 RE_DEF = re.compile(r"([_a-zA-Z][a-zA-Z0-9]*)[ \t]*:[ \t]*(.*)")
 RE_IFPARSE = re.compile(r'"(""|[^"])*"|[(),]|\b[_a-zA-Z]+\b|[^," \t()]+')
 RE_ID = re.compile(r"\b[_a-zA-Z]+\b")
@@ -152,11 +152,15 @@ def parse_ifline(if_line: str, lineno: int) -> TreeType | None:
             if not isinstance(op, str) or op not in IF_OPERATORS:
                 errmsg.warning(lineno, f"Unexpected binary operator '{op}'")
                 return None
-            # FIXME
-            if isinstance(left_, list) and len(left_) == 3 and IF_OPERATORS[left_[-2]] > IF_OPERATORS[op]:  # type: ignore[index]
-                expr = [[left_[:-2], left_[-2], [left_[-1], op, right_]]]  # Rebalance tree
-            else:
-                expr = [expr]
+
+            oper = FN(op)
+            if isinstance(left_, list) and len(left_) == 3:
+                oper2 = FN(left_[-2])
+                if IF_OPERATORS[oper2] > IF_OPERATORS[oper]:
+                    expr = [[left_[:-2], left_[-2], [left_[-1], op, right_]]]  # Rebalance tree
+                    continue
+
+            expr = [expr]
 
     if not error_ and paren:
         errmsg.warning(lineno, "unclosed parenthesis in IF section")

tests/arch/zx48k/peephole/test_parser.py

@@ -355,3 +355,46 @@ def test_in_list(self):
             "WITH": ["pop $1", "$2"],
             "DEFINE": [],
         }
+
+    def test_parse_cond(self):
+        result = parser.parse_str(
+            """
+            OLEVEL: 1
+            OFLAG: 14
+            REPLACE {{
+              $1
+            }}
+
+            WITH {{
+            }}
+
+            IF {{
+             $1 == "nop"
+            }}
+            """
+        )
+        assert result == {
+            "OLEVEL": 1,
+            "OFLAG": 14,
+            "REPLACE": ["$1"],
+            "WITH": [],
+            "DEFINE": [],
+            "IF": ["$1", "==", "nop"],
+        }
+
+    def test_parse_if_must_start_in_a_new_line(self):
+        result = parser.parse_str(
+            """
+            OLEVEL: 1
+            OFLAG: 14
+            REPLACE {{
+              $1
+            }}
+
+            WITH {{
+            }}
+            ;; this is not valid
+            IF {{ $1 == "nop" }}
+            """
+        )
+        assert result is None