Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/third_party/rust/jsparagus/js_parser/parser.py b/third_party/rust/jsparagus/js_parser/parser.py
new file mode 100644
index 0000000000..f67708a9cc
--- /dev/null
+++ b/third_party/rust/jsparagus/js_parser/parser.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+
+"""parser.py - A JavaScript parser, currently with many bugs.
+
+See README.md for instructions.
+"""
+
+from . import parser_tables
+from .lexer import JSLexer
+
+
+# "type: ignore" because mypy can't see inside js_parser.parser_tables.
+class JSParser(parser_tables.Parser):  # type: ignore
+    def __init__(self, goal='Script', builder=None):
+        super().__init__(goal, builder)
+        self._goal = goal
+
+    def clone(self):
+        return JSParser(self._goal, self.methods)
+
+    def on_recover(self, error_code, lexer, stv):
+        """Check that ASI error recovery is really acceptable."""
+        if error_code == 'asi':
+            # ASI is allowed in three places:
+            # - at the end of the source text
+            # - before a close brace `}`
+            # - after a LineTerminator
+            # Hence the three-part if-condition below.
+            #
+            # The other quirks of ASI are implemented by massaging the syntax,
+            # in parse_esgrammar.py.
+            if not self.closed and stv.term != '}' and not lexer.saw_line_terminator():
+                lexer.throw("missing semicolon")
+        else:
+            # ASI is always allowed in this one state.
+            assert error_code == 'do_while_asi'
+
+
+def parse_Script(text):
+    lexer = JSLexer(JSParser('Script'))
+    lexer.write(text)
+    return lexer.close()