fix: properly locates closing parenthesis in the presence of quotes

Fixes #250

Author: gnikit

CHANGELOG.md

@@ -6,6 +6,8 @@
 
 - Fixed bug where parser would crash when trying to retrieve an invalid line no.
   ([#398](https://github.com/fortran-lang/fortls/issues/398))
+- Fixed bug with string quotes not being escaped when looking for parenthesis
+  ([#250](https://github.com/fortran-lang/fortls/issues/250))
 
 ## 3.0.0
 

fortls/helper_functions.py

@@ -260,9 +260,21 @@ def find_paren_match(string: str) -> int:
 
     >>> find_paren_match('a, (b, (c, d)')
     -1
+
+    >>> find_paren_match('nt(sin(0.5))+8+len("ab((c")-3) :: y')
+    29
+
+    >>> find_paren_match("nt(sin(0.5))+8+len('ab))c')-3) :: y")
+    29
     """
     paren_count = 1
+    quote_state = {"'": False, '"': False}
     for i, char in enumerate(string):
+        if char in quote_state:
+            quote_state[char] = not quote_state[char]
+        if any(quote_state.values()):
+            continue
+
         if char == "(":
             paren_count += 1
         elif char == ")":

test/test_server_hover.py

@@ -666,3 +666,17 @@ def test_types():
         "```fortran90\nTYPE, EXTENDS(extends_t) :: a_t\n```",
     ]
     validate_hover(results, ref_results)
+
+
+def test_complicated_kind_spec():
+    string = write_rpc_request(1, "initialize", {"rootPath": str(test_dir / "hover")})
+    file_path = test_dir / "hover" / "complicated_kind_spec.f90"
+    string += hover_req(file_path, 1, 40)
+    string += hover_req(file_path, 2, 40)
+    errcode, results = run_request(string, fortls_args=["-n", "1"])
+    assert errcode == 0
+    ref_results = [
+        '```fortran90\nREAL(int(sin(0.5))+8+len("ab((c")-3) :: y\n```',
+        '```fortran90\nREAL(int(sin(0.5))+8+len("ab))c")-3) :: z\n```',
+    ]
+    validate_hover(results, ref_results)

test/test_source/hover/complicated_kind_spec.f90

@@ -0,0 +1,4 @@
+program complicated_kind_spec
+real(int(sin(0.5))+8+len("ab((c")-3) :: y
+real(int(sin(0.5))+8+len("ab))c")-3) :: z
+end program