Type fixes

runner.py

@@ -10,10 +10,6 @@ from runstatus import ReduceStatus
 from runstatus import CommandStatus
 
 
-
-
-
-
 class Runner:
 	def __init__(self):
 		self.macro_table = {}
@@ -43,7 +39,7 @@ class Runner:
 		i = 0
 		macro_expansions = 0
 
-		while i < self.reduction_limit:
+		while (self.reduction_limit is None) or (i < self.reduction_limit):
 			r = expr.reduce(self.macro_table)
 			expr = r.output
 
@@ -64,7 +60,7 @@ class Runner:
 		return ReduceStatus(
 			reduction_count = i - macro_expansions,
 			stop_reason = StopReason.MAX_EXCEEDED,
-			result = r.output
+			result = r.output  # type: ignore
 		)
 
 
@@ -89,9 +85,11 @@ class Runner:
 			return self.exec_command(e.name)
 
 		# If this line is a plain expression, reduce it.
-		else:
+		elif isinstance(e, tokens.LambdaToken):
 			e.bind_variables()
 			return self.reduce_expression(e)
+		else:
+			raise TypeError(f"I don't know what to do with a {type(e)}")
 
 
 	def run_lines(self, lines: list[str]):

tokens.py

@@ -302,9 +302,9 @@ class lambda_func(LambdaToken):
 
 
 		# Bind variables inside this function.
-		if isinstance(self.output, macro):
+		if isinstance(self.output, macro) and placeholder is not None:
 			if self.output == placeholder:
-				self.output = val
+				self.output = val # type: ignore
 		elif isinstance(self.output, lambda_func):
 			self.output.bind_variables(placeholder, val)
 		elif isinstance(self.output, lambda_apply):
@@ -345,7 +345,7 @@ class lambda_func(LambdaToken):
 		calling_self = False
 		if bound_var is None:
 			calling_self = True
-			bound_var = self.input
+			bound_var = self.input # type: ignore
 		new_out = self.output
 		if isinstance(self.output, bound_variable):
 			if self.output == bound_var:
@@ -353,7 +353,7 @@ class lambda_func(LambdaToken):
 		elif isinstance(self.output, lambda_func):
 			new_out = self.output.apply(val, bound_var = bound_var)
 		elif isinstance(self.output, lambda_apply):
-			new_out = self.output.sub_bound_var(val, bound_var = bound_var)
+			new_out = self.output.sub_bound_var(val, bound_var = bound_var) # type: ignore
 
 		# If we're applying THIS function,
 		# just give the output
@@ -430,7 +430,7 @@ class lambda_apply(LambdaToken):
 		# everything below should still work as expected.
 		if isinstance(self.fn, macro) and placeholder is not None:
 			if self.fn == placeholder:
-				self.fn = val
+				self.fn = val # type: ignore
 		elif isinstance(self.fn, lambda_func):
 			self.fn.bind_variables(placeholder, val)
 		elif isinstance(self.fn, lambda_apply):
@@ -438,7 +438,7 @@ class lambda_apply(LambdaToken):
 
 		if isinstance(self.arg, macro) and placeholder is not None:
 			if self.arg == placeholder:
-				self.arg = val
+				self.arg = val # type: ignore
 		elif isinstance(self.arg, lambda_func):
 			self.arg.bind_variables(placeholder, val)
 		elif isinstance(self.arg, lambda_apply):