bugfix: error in parentheses detection

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "vyper-lsp"
-version = "0.0.3"
+version = "0.0.5"
 description = "Language server for Vyper, a pythonic smart contract language"
 authors = ["z80 <z80@ophy.xyz>"]
 license = "MIT"

vyper_lsp/navigation.py

@@ -1,3 +1,4 @@
+import logging
 import re
 from lsprotocol.types import Position, Range
 from typing import List, Optional
@@ -9,6 +10,8 @@
 
 ENUM_VARIANT_PATTERN = re.compile(r"([a-zA-Z_][a-zA-Z0-9_]*)\.([a-zA-Z_][a-zA-Z0-9_]*)")
 
+logger = logging.getLogger("vyper-lsp")
+
 
 # this class should abstract away all the AST stuff
 # and just provide a simple interface for navigation
@@ -167,10 +170,14 @@ def find_declaration(self, document: Document, pos: Position) -> Optional[Range]
 
     def find_implementation(self, document: Document, pos: Position) -> Optional[Range]:
         og_line = document.lines[pos.line]
+        logger.info(f"finding implementation for {og_line}")
         word = get_word_at_cursor(og_line, pos.character)
         expression = get_expression_at_cursor(og_line, pos.character)
+        logger.info(f"word: {word}")
+        logger.info(f"expression: {expression}")
 
         if "(" not in expression:
+            logger.info("no parens in expression")
             return None
 
         if expression.startswith("self."):

vyper_lsp/utils.py

@@ -78,7 +78,7 @@ def _check_if_cursor_is_within_parenthesis(sentence: str, cursor_index: int) ->
     while end < len(sentence) and sentence[end] != ")":
         end += 1
 
-    if start < cursor_index and cursor_index < end:
+    if start != 0 and start < cursor_index and cursor_index < end:
         return True
     return False
 
@@ -89,9 +89,11 @@ def _get_entire_function_call(sentence: str, cursor_index: int) -> str:
 
     # Find the start of the word
     # only skip spaces if we're within the parenthesis
+    logger.info(sentence[start])
     while start > 0 and sentence[start - 1] != "(":
         start -= 1
 
+    logger.info(sentence[start])
     while start > 0 and sentence[start - 1] != " ":
         start -= 1
 
@@ -100,11 +102,13 @@ def _get_entire_function_call(sentence: str, cursor_index: int) -> str:
         end += 1
 
     fn_call = sentence[start:end]
+    logger.info(fn_call)
     return fn_call
 
 
 def get_expression_at_cursor(sentence: str, cursor_index: int) -> str:
     if _check_if_cursor_is_within_parenthesis(sentence, cursor_index):
+        logger.info("cursor is within parenthesis")
         return _get_entire_function_call(sentence, cursor_index)
 
     # does the same thing as get_word_at_cursor but includes . and [ and ] in the expression