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Add support for array specs in fortran 77 cray pointers #216

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Add support for array specs in fortran 77 cray pointers #216

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a3779d8
feat: support array-style cray pointers in Fortran77
ProgramFan Apr 24, 2022
eb1511c
feat: make cray pointer AST node consistant
ProgramFan Apr 26, 2022
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7 changes: 5 additions & 2 deletions src/Language/Fortran/Parser/Fixed/Fortran77.y
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Original file line number Diff line number Diff line change
Expand Up @@ -606,9 +606,12 @@ POINTER_LIST :: { [ Declarator A0 ] }
: POINTER_LIST ',' POINTER { $3 : $1 }
| POINTER { [ $1 ] }

-- Cray pointers as of https://gcc.gnu.org/onlinedocs/gfortran/Cray-pointers.html
POINTER :: { Declarator A0 }
: '(' VARIABLE ',' VARIABLE ')'
{ Declarator () (getTransSpan $1 $5) $2 ScalarDecl Nothing (Just $4) }
: '(' VARIABLE ',' VARIABLE '(' DIMENSION_DECLARATORS ')' ')'
{ Declarator () (getTransSpan $1 $8) $4 (ArrayDecl (aReverse $6)) Nothing (Just $2) }
| '(' VARIABLE ',' VARIABLE ')'
{ Declarator () (getTransSpan $1 $5) $4 ScalarDecl Nothing (Just $2) }

COMMON_GROUPS :: { AList CommonGroup A0 }
: COMMON_GROUPS COMMON_GROUP { setSpan (getTransSpan $1 $2) $ $2 `aCons` $1 }
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14 changes: 14 additions & 0 deletions test/Language/Fortran/Parser/Fixed/Fortran77/ParserSpec.hs
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Expand Up @@ -387,6 +387,20 @@ spec =
resetSrcSpan (slParser autoSrc) `shouldBe` autoStmt
resetSrcSpan (slParser staticSrc) `shouldBe` staticStmt

describe "Cray Pointer Extension" $ do
it "parses simple pointee decleration" $ do
let pointerStmt = StPointer () u (AList () u [p])
p = Declarator () u (varGen "y") ScalarDecl Nothing (Just (varGen "x"))
pointerSrc = " pointer (x, y)"
resetSrcSpan (slParser pointerSrc) `shouldBe` pointerStmt
it "parses array pointee decleration" $ do
let pointerStmt = StPointer () u (AList () u [p])
p = Declarator () u (varGen "y") arrayDecl Nothing (Just (varGen "x"))
arrayDecl = ArrayDecl (AList () u [dim])
dim = DimensionDeclarator () u Nothing (Just $ intGen 3)
pointerSrc = " pointer (x, y(3))"
resetSrcSpan (slParser pointerSrc) `shouldBe` pointerStmt

exampleProgram1 :: String
exampleProgram1 = unlines
[ " program hello"
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