2025-12-01

2026-03-17 14:58:51 -06:00
parent 183e865f8b
commit 4b82b57113
6846 changed files with 954887 additions and 162606 deletions
@@ -0,0 +1,68 @@
+__all__ = ["is_digit", "is_letter", "is_name_start", "is_name_continue"]
+
+try:
+    "string".isascii()
+except AttributeError:  # Python < 3.7
+
+    def is_digit(char: str) -> bool:
+        """Check whether char is a digit
+
+        For internal use by the lexer only.
+        """
+        return "0" <= char <= "9"
+
+    def is_letter(char: str) -> bool:
+        """Check whether char is a plain ASCII letter
+
+        For internal use by the lexer only.
+        """
+        return "a" <= char <= "z" or "A" <= char <= "Z"
+
+    def is_name_start(char: str) -> bool:
+        """Check whether char is allowed at the beginning of a GraphQL name
+
+        For internal use by the lexer only.
+        """
+        return "a" <= char <= "z" or "A" <= char <= "Z" or char == "_"
+
+    def is_name_continue(char: str) -> bool:
+        """Check whether char is allowed in the continuation of a GraphQL name
+
+        For internal use by the lexer only.
+        """
+        return (
+            "a" <= char <= "z"
+            or "A" <= char <= "Z"
+            or "0" <= char <= "9"
+            or char == "_"
+        )
+
+else:
+
+    def is_digit(char: str) -> bool:
+        """Check whether char is a digit
+
+        For internal use by the lexer only.
+        """
+        return char.isascii() and char.isdigit()
+
+    def is_letter(char: str) -> bool:
+        """Check whether char is a plain ASCII letter
+
+        For internal use by the lexer only.
+        """
+        return char.isascii() and char.isalpha()
+
+    def is_name_start(char: str) -> bool:
+        """Check whether char is allowed at the beginning of a GraphQL name
+
+        For internal use by the lexer only.
+        """
+        return char.isascii() and (char.isalpha() or char == "_")
+
+    def is_name_continue(char: str) -> bool:
+        """Check whether char is allowed in the continuation of a GraphQL name
+
+        For internal use by the lexer only.
+        """
+        return char.isascii() and (char.isalnum() or char == "_")