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Do not crash when failing to read an entry (#1090)
[etc/vim.git] / blib2to3 / pgen2 / conv.py
diff --git a/blib2to3/pgen2/conv.py b/blib2to3/pgen2/conv.py
index dd70752722fc43050b570f527df69d3fa653960c..728b152655c5fa50ba952c9ee6fb485599d218db 100644 (file)
--- a/blib2to3/pgen2/conv.py
+++ b/blib2to3/pgen2/conv.py
@@ -70,8 +70,7 @@ class Converter(grammar.Grammar):
             lineno += 1
             mo = re.match(r"^#define\s+(\w+)\s+(\d+)$", line)
             if not mo and line.strip():
             lineno += 1
             mo = re.match(r"^#define\s+(\w+)\s+(\d+)$", line)
             if not mo and line.strip():
-                print("%s(%s): can't parse %s" % (filename, lineno,
-                                                  line.strip()))
+                print("%s(%s): can't parse %s" % (filename, lineno, line.strip()))
             else:
                 symbol, number = mo.groups()
                 number = int(number)
             else:
                 symbol, number = mo.groups()
                 number = int(number)
@@ -118,39 +117,38 @@ class Converter(grammar.Grammar):
         lineno = 0
 
         # Expect the two #include lines
         lineno = 0
 
         # Expect the two #include lines
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         assert line == '#include "pgenheaders.h"\n', (lineno, line)
         assert line == '#include "pgenheaders.h"\n', (lineno, line)
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         assert line == '#include "grammar.h"\n', (lineno, line)
 
         # Parse the state definitions
         assert line == '#include "grammar.h"\n', (lineno, line)
 
         # Parse the state definitions
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         allarcs = {}
         states = []
         while line.startswith("static arc "):
             while line.startswith("static arc "):
         allarcs = {}
         states = []
         while line.startswith("static arc "):
             while line.startswith("static arc "):
-                mo = re.match(r"static arc arcs_(\d+)_(\d+)\[(\d+)\] = {$",
-                              line)
+                mo = re.match(r"static arc arcs_(\d+)_(\d+)\[(\d+)\] = {$", line)
                 assert mo, (lineno, line)
                 n, m, k = list(map(int, mo.groups()))
                 arcs = []
                 for _ in range(k):
                 assert mo, (lineno, line)
                 n, m, k = list(map(int, mo.groups()))
                 arcs = []
                 for _ in range(k):
-                    lineno, line = lineno+1, next(f)
+                    lineno, line = lineno + 1, next(f)
                     mo = re.match(r"\s+{(\d+), (\d+)},$", line)
                     assert mo, (lineno, line)
                     i, j = list(map(int, mo.groups()))
                     arcs.append((i, j))
                     mo = re.match(r"\s+{(\d+), (\d+)},$", line)
                     assert mo, (lineno, line)
                     i, j = list(map(int, mo.groups()))
                     arcs.append((i, j))
-                lineno, line = lineno+1, next(f)
+                lineno, line = lineno + 1, next(f)
                 assert line == "};\n", (lineno, line)
                 allarcs[(n, m)] = arcs
                 assert line == "};\n", (lineno, line)
                 allarcs[(n, m)] = arcs
-                lineno, line = lineno+1, next(f)
+                lineno, line = lineno + 1, next(f)
             mo = re.match(r"static state states_(\d+)\[(\d+)\] = {$", line)
             assert mo, (lineno, line)
             s, t = list(map(int, mo.groups()))
             assert s == len(states), (lineno, line)
             state = []
             for _ in range(t):
             mo = re.match(r"static state states_(\d+)\[(\d+)\] = {$", line)
             assert mo, (lineno, line)
             s, t = list(map(int, mo.groups()))
             assert s == len(states), (lineno, line)
             state = []
             for _ in range(t):
-                lineno, line = lineno+1, next(f)
+                lineno, line = lineno + 1, next(f)
                 mo = re.match(r"\s+{(\d+), arcs_(\d+)_(\d+)},$", line)
                 assert mo, (lineno, line)
                 k, n, m = list(map(int, mo.groups()))
                 mo = re.match(r"\s+{(\d+), arcs_(\d+)_(\d+)},$", line)
                 assert mo, (lineno, line)
                 k, n, m = list(map(int, mo.groups()))
@@ -158,9 +156,9 @@ class Converter(grammar.Grammar):
                 assert k == len(arcs), (lineno, line)
                 state.append(arcs)
             states.append(state)
                 assert k == len(arcs), (lineno, line)
                 state.append(arcs)
             states.append(state)
-            lineno, line = lineno+1, next(f)
+            lineno, line = lineno + 1, next(f)
             assert line == "};\n", (lineno, line)
             assert line == "};\n", (lineno, line)
-            lineno, line = lineno+1, next(f)
+            lineno, line = lineno + 1, next(f)
         self.states = states
 
         # Parse the dfas
         self.states = states
 
         # Parse the dfas
@@ -169,9 +167,8 @@ class Converter(grammar.Grammar):
         assert mo, (lineno, line)
         ndfas = int(mo.group(1))
         for i in range(ndfas):
         assert mo, (lineno, line)
         ndfas = int(mo.group(1))
         for i in range(ndfas):
-            lineno, line = lineno+1, next(f)
-            mo = re.match(r'\s+{(\d+), "(\w+)", (\d+), (\d+), states_(\d+),$',
-                          line)
+            lineno, line = lineno + 1, next(f)
+            mo = re.match(r'\s+{(\d+), "(\w+)", (\d+), (\d+), states_(\d+),$', line)
             assert mo, (lineno, line)
             symbol = mo.group(2)
             number, x, y, z = list(map(int, mo.group(1, 3, 4, 5)))
             assert mo, (lineno, line)
             symbol = mo.group(2)
             number, x, y, z = list(map(int, mo.group(1, 3, 4, 5)))
@@ -180,7 +177,7 @@ class Converter(grammar.Grammar):
             assert x == 0, (lineno, line)
             state = states[z]
             assert y == len(state), (lineno, line)
             assert x == 0, (lineno, line)
             state = states[z]
             assert y == len(state), (lineno, line)
-            lineno, line = lineno+1, next(f)
+            lineno, line = lineno + 1, next(f)
             mo = re.match(r'\s+("(?:\\\d\d\d)*")},$', line)
             assert mo, (lineno, line)
             first = {}
             mo = re.match(r'\s+("(?:\\\d\d\d)*")},$', line)
             assert mo, (lineno, line)
             first = {}
@@ -188,21 +185,21 @@ class Converter(grammar.Grammar):
             for i, c in enumerate(rawbitset):
                 byte = ord(c)
                 for j in range(8):
             for i, c in enumerate(rawbitset):
                 byte = ord(c)
                 for j in range(8):
-                    if byte & (1<<j):
-                        first[i*8 + j] = 1
+                    if byte & (1 << j):
+                        first[i * 8 + j] = 1
             dfas[number] = (state, first)
             dfas[number] = (state, first)
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         assert line == "};\n", (lineno, line)
         self.dfas = dfas
 
         # Parse the labels
         labels = []
         assert line == "};\n", (lineno, line)
         self.dfas = dfas
 
         # Parse the labels
         labels = []
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         mo = re.match(r"static label labels\[(\d+)\] = {$", line)
         assert mo, (lineno, line)
         nlabels = int(mo.group(1))
         for i in range(nlabels):
         mo = re.match(r"static label labels\[(\d+)\] = {$", line)
         assert mo, (lineno, line)
         nlabels = int(mo.group(1))
         for i in range(nlabels):
-            lineno, line = lineno+1, next(f)
+            lineno, line = lineno + 1, next(f)
             mo = re.match(r'\s+{(\d+), (0|"\w+")},$', line)
             assert mo, (lineno, line)
             x, y = mo.groups()
             mo = re.match(r'\s+{(\d+), (0|"\w+")},$', line)
             assert mo, (lineno, line)
             x, y = mo.groups()
@@ -212,35 +209,35 @@ class Converter(grammar.Grammar):
             else:
                 y = eval(y)
             labels.append((x, y))
             else:
                 y = eval(y)
             labels.append((x, y))
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         assert line == "};\n", (lineno, line)
         self.labels = labels
 
         # Parse the grammar struct
         assert line == "};\n", (lineno, line)
         self.labels = labels
 
         # Parse the grammar struct
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         assert line == "grammar _PyParser_Grammar = {\n", (lineno, line)
         assert line == "grammar _PyParser_Grammar = {\n", (lineno, line)
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         mo = re.match(r"\s+(\d+),$", line)
         assert mo, (lineno, line)
         ndfas = int(mo.group(1))
         assert ndfas == len(self.dfas)
         mo = re.match(r"\s+(\d+),$", line)
         assert mo, (lineno, line)
         ndfas = int(mo.group(1))
         assert ndfas == len(self.dfas)
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         assert line == "\tdfas,\n", (lineno, line)
         assert line == "\tdfas,\n", (lineno, line)
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         mo = re.match(r"\s+{(\d+), labels},$", line)
         assert mo, (lineno, line)
         nlabels = int(mo.group(1))
         assert nlabels == len(self.labels), (lineno, line)
         mo = re.match(r"\s+{(\d+), labels},$", line)
         assert mo, (lineno, line)
         nlabels = int(mo.group(1))
         assert nlabels == len(self.labels), (lineno, line)
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         mo = re.match(r"\s+(\d+)$", line)
         assert mo, (lineno, line)
         start = int(mo.group(1))
         assert start in self.number2symbol, (lineno, line)
         self.start = start
         mo = re.match(r"\s+(\d+)$", line)
         assert mo, (lineno, line)
         start = int(mo.group(1))
         assert start in self.number2symbol, (lineno, line)
         self.start = start
-        lineno, line = lineno+1, next(f)
+        lineno, line = lineno + 1, next(f)
         assert line == "};\n", (lineno, line)
         try:
         assert line == "};\n", (lineno, line)
         try:
-            lineno, line = lineno+1, next(f)
+            lineno, line = lineno + 1, next(f)
         except StopIteration:
             pass
         else:
         except StopIteration:
             pass
         else:
@@ -248,8 +245,8 @@ class Converter(grammar.Grammar):
 
     def finish_off(self):
         """Create additional useful structures.  (Internal)."""
 
     def finish_off(self):
         """Create additional useful structures.  (Internal)."""
-        self.keywords = {} # map from keyword strings to arc labels
-        self.tokens = {}   # map from numeric token values to arc labels
+        self.keywords = {}  # map from keyword strings to arc labels
+        self.tokens = {}  # map from numeric token values to arc labels
         for ilabel, (type, value) in enumerate(self.labels):
             if type == token.NAME and value is not None:
                 self.keywords[value] = ilabel
         for ilabel, (type, value) in enumerate(self.labels):
             if type == token.NAME and value is not None:
                 self.keywords[value] = ilabel
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