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Fix Io_Implied_Do rejecting a minimal-length io-implied-do (closes #524) #525

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Merged
arporter merged 2 commits into from
Aug 24, 2026
Merged

Fix Io_Implied_Do rejecting a minimal-length io-implied-do (closes #524) #525

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7989061
Fix Io_Implied_Do rejecting a minimal-length io-implied-do
Aug 18, 2026
59c0e2d
Merge branch 'master' into 524_io_implied_do
arporter Aug 24, 2026
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4 changes: 3 additions & 1 deletion src/fparser/two/Fortran2003.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9329,7 +9329,9 @@ class Io_Implied_Do(Base): # R917

@staticmethod
def match(string):
if len(string) <= 9 or string[0] != "(" or string[-1] != ")":
# The shortest possible io-implied-do, e.g. "(i,i=1,2)", is 9
# characters long.
if len(string) < 9 or string[0] != "(" or string[-1] != ")":
return
line, repmap = string_replace_map(string[1:-1].strip())
i = line.rfind("=")
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5 changes: 5 additions & 0 deletions src/fparser/two/tests/test_fortran2003.py
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Expand Up @@ -2228,6 +2228,11 @@ def test_io_implied_do(): # R917
assert isinstance(obj, tcls), repr(obj)
assert str(obj) == "(a, i = 1, 2)"

# Minimal-length (9-character) io-implied-do.
obj = tcls("(i,i=1,2)")
assert isinstance(obj, tcls), repr(obj)
assert str(obj) == "(i, i = 1, 2)"

obj = tcls("((i+j,j=3,4,1), i=1,2)")
assert isinstance(obj, tcls), repr(obj)
assert str(obj) == "((i + j, j = 3, 4, 1), i = 1, 2)"
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