+ Fix issue 589.
+ Catch empty subscript list in array reference
In name resolution, when skimming through the execution statement of a
function, calls to the result symbol should not trigger the conversion
of this symbol to a function symbol. The result is a data object and
cannot be called unless it was explictly declared to be a procedure
pointer.
Notably, recursive function calls cannot be made if RESULT was not used.
The symbol is prevented from being transformed into a function
symbol by transforming it into an object before skimming through the
executable statement. This is done after processing all the
specifications so that if the result actually is a procedure pointer,
the call to `ConvertToObjectEntity` introduced by this commit will
not convert it to an object by mistake.
This commit also introduce a check when fixing misparsed function
reference into array reference to verify the array reference has
array subscripts. Currently this went uncaught. It is not possible
to complain later in expressions because the subscript list of
expression might be empty for unrelated error recovery reasons
(e.g. if an entity of the wrong type appeared as susbcript).
Add related tests.
Original-commit: flang-compiler/f18@2fd8b65f58
Reviewed-on: https://github.com/flang-compiler/f18/pull/631
Tree-same-pre-rewrite: false
After fixing 594, it appears there were issues in
FindUltimateComponent that was considering type bound
procedure as components.
This commit fixes and beef-up the component visitation by making a visitor
class for it. The main advantage of making it an class vs functions is that
it is possible to get the component chain to the result component for better
feedback for the user.
The framework allow a single place to define/handle what ultimate, direct and
potential components are.
Original-commit: flang-compiler/f18@d84821a1d6
Reviewed-on: https://github.com/flang-compiler/f18/pull/607
Tree-same-pre-rewrite: false
There were many places in tests and predefined modules that had
incorrect code that we weren't detecting until now.
Most of the problems were deferred-shape arrays that should have
been implied-shape. For example:
`real, parameter :: a(:) = [1.0, 2.0]`
should have `(*)` rather than `(:)`.
There were also a few places with deferred-shape arrays that were
not allocatable/pointer or explicit-shape ones that were.
Original-commit: flang-compiler/f18@0a959ce1d8
Reviewed-on: https://github.com/flang-compiler/f18/pull/630
There are many constraints on what kind of array-specs can appear
in what contexts. Add `CheckArraySpec()` to perform most of them.
When the check fails, don't set the shape of the symbol being
declared and instead set the Error flag so we can avoid cascading
errors.
Fixesflang-compiler/f18#609.
Original-commit: flang-compiler/f18@f159d97f1f
Reviewed-on: https://github.com/flang-compiler/f18/pull/630
Tree-same-pre-rewrite: false
This allows it to have member functions `Rank()`, `IsExplicitShape()`,
`IsAssumedShape()`, etc. Make use of those new functions and remove
`isExplicit()` and `isDeferred()` from `ShapeSpec` as they are no
longer needed.
Original-commit: flang-compiler/f18@7ef7ad6359
Reviewed-on: https://github.com/flang-compiler/f18/pull/630
Tree-same-pre-rewrite: false
An array-spec like `(:,:)` (with one or more colons) is either a
deferred-shape-spec-list or an assumed-shape-spec-list and they
can only be distinguished by context that the parser doesn't have.
We were parsing these as assumed-shape-spec-list but they are easier
to deal with if we parse them as deferred-shape-spec-list because
anything that is the latter is also one of the former.
Original-commit: flang-compiler/f18@78c3f3b96f
Reviewed-on: https://github.com/flang-compiler/f18/pull/630
Tree-same-pre-rewrite: false
- make `TypaParamAttr` a `ParamValue` argument. Modify
`GetParamValue` to also take this as an argument.
- remove `GetLenParamValue` that is now useless and
modify constructor/`GetParamValue` calls
- get it the `TypeParamAttr` right from the begining
when visiting `parser::DerivedTypeSpec` in resolve-names.cc.
It was set to `Kind` by default and it was hard to ensure the
attribute would not be checked until set properly.
Original-commit: flang-compiler/f18@bcc300e714
Reviewed-on: https://github.com/flang-compiler/f18/pull/615
While testing fix for issue 581 it appeared that 'ParamValue`
implicit len parameters had incorrect attribute kind.
This commit:
+ Set correct attribute when creating `ParamValue` for implicit
type parameter.
+ Also set the correct attribute foe charachter lenght `ParamValue`
though it is currently not used anywhere.
+ Change some std::int64_t to common::ConstantSubscript on the way.
Original-commit: flang-compiler/f18@57a344b256
Reviewed-on: https://github.com/flang-compiler/f18/pull/615
Tree-same-pre-rewrite: false
`HaveCompatibleKindParameters` was not considering the kind
parameters of the parent types leading to false answers.
This change fixes this by directly looking into the map of `ParamValue`
of the `DeclTypeSpec` instead of going through the symbols of the derived
type scope. This map contains all the parent and implicit type parameters.
Original-commit: flang-compiler/f18@cd5b976fc9
Reviewed-on: https://github.com/flang-compiler/f18/pull/615
Tree-same-pre-rewrite: false
* [OpenMP] parse tree changes for standalone directives
1. Put all standalone directives except FLUSH, CANCEL, and CANCELLATION POINT
into one `OpenMPSimpleStandaloneConstruct` (for no-clause directive,
validity checks will be deferred to Semantics). A top-level class will
include all the standalone directive nodes. This simplies the logic a lot.
2. All the standalone directives now have their own source provenance for
directive name itself.
3. Change check-omp-structure.* to avoid assertions
4. Add basic tests for standalone directives, more will be added during
the clause validity checks in Semantics
* Resolve !$OMP ORDERED ambiguity by attempting block construct first - Peter
Original-commit: flang-compiler/f18@a77aa7ed84
Reviewed-on: https://github.com/flang-compiler/f18/pull/627
- dosemantics05.f90: Added tests for ASSOCIATE, BLOCK and SELECT TYPE statements and changed the error messages.
- check-do.cc: Changed things so that FindScope() is only called once when DoConcurrentVariableEnforce is instantiated. I changed the error message. I changed the type and name of CS to be an std::set and be called SymbolContainer.
- resolve-names.cc: I changed the Pre() function for parser::Statement to add the source range of a statement to both the current scope and all of its parents. This fixed a problem with finding the current scope based on the source position.
Original-commit: flang-compiler/f18@085b2c18f3
Reviewed-on: https://github.com/flang-compiler/f18/pull/612
The constraint states that "If the locality-spec DEFAULT ( NONE ) appears in a DO CONCURRENT statement; a variable that is a local or construct entity of a scope containing the DO CONCURRENT construct; and that appears in the block of the construct; shall have its locality explicitly specified by that statement."
Here's a summary of the changes:
- In check-do.cc: Implemented the function
CheckDefaultNoneImpliesExplicitLocality() to do the checking. This involved
adding the class DoConcurrentVariableEnforce to walk the DO loop's block
looking for variable names. I also cleaned up the code a little in
CheckDoExpression() and EnforceConcurrentLoopControl().
- Added the test dosemantics05.f90
Original-commit: flang-compiler/f18@2369aa805e
Reviewed-on: https://github.com/flang-compiler/f18/pull/612
Tree-same-pre-rewrite: false
1. Changes are to save provenance for directive names
2. check-omp-structure.* is updated to avoid assertion errors
3. Tests added now are only for the basic usages for the declarative directives,
more complete examples will be added once we start implementing the semantics
checks for declarative directives
Original-commit: flang-compiler/f18@433e274f68
Reviewed-on: https://github.com/flang-compiler/f18/pull/620
* [OpenMP] Add Sections and Single Construct check
Parse tree for OmpEndSingle needs to be modified to save the provenance
of END SINGLE directive and check its own clauses
* Update on reviews
1. PushContext is created to push new context with source provenance
2. Tweak the logic for SECTION nesting, treak Orphaned or wrong nesting
as the same error type
3. Make sure the check for NOWAIT clause only applies to the ones that
are not handled by parser.
Note that the case for DO or DO_SIMD will take effect after the
loop association work (parse tree change) is done. But I still list
them there for completeness.
4. Happen to find that NOWAIT is not accepted by PARALLEL SECTIONS,
fixed it in the parser.
Original-commit: flang-compiler/f18@236cf1efea
Reviewed-on: https://github.com/flang-compiler/f18/pull/585
When we use-associate a generic interface name and then add more
procedures to the generic, we create a new symbol for the merged
generic. That symbol has to include a pointer to the derived type
or procedure with the same name, just as the original generic did.
To achieve that, change `AddSpecificProcsFrom` to also copy those
fields from the original symbol and change its name to `CopyFrom`
to reflect its new purpose. Also, change it to take `GenericDetails`
instead of `Symbol` as its argument so we can't call it on the wrong
kind of symbol.
Original-commit: flang-compiler/f18@1e22970e43
Reviewed-on: https://github.com/flang-compiler/f18/pull/614
When a generic interface had no specific procedures, we were writing
it the `.mod` file as `generic::g=>`, which is not valid Fortran.
Change to writing generics as interface blocks rather than generic
statements so that this case is handled. Include an access stmt if it
was declared private.
Also fix a bug in `test_errors.sh` where the expected/actual error
messages weren't sorted by line number correctly.
Original-commit: flang-compiler/f18@1c32a289b5
Reviewed-on: https://github.com/flang-compiler/f18/pull/614
Tree-same-pre-rewrite: false
Create symbols for generics in a pre-pass over the specification part so
it is easier to handle cases when they have the same name as a derived
type or subprogram. This is done by calling `PreSpecificationConstruct`
on each `SpecificationConstruct` of a specification part before we
continue walking it. The generics symbols are created there and the same
mechanism will be used to handle forward references to derived types.
Report an error when the same name is used for a generic interface,
derived type, and subprogram.
Improve the error message issued when a procedure and generic interface
have the same name but the procedure is not a specific of the generic.
Change `SayAlreadyDeclared` to report the error on the second occurence
of the name when possible. This can arise for declarations the are
processed out of order, e.g. contained subprograms and generic interfaces.
Avoid multiple "already declared" errors for the case when a contained
subprogram has the same name as a declared entity. We first create the
symbol with SubprogramNameDetails, then replace it with the entity (and
report the error), then replace it with the real subprogram (and get the
error again). By setting and checking the error flag we avoid the second
error.
Original-commit: flang-compiler/f18@48fc076783
Reviewed-on: https://github.com/flang-compiler/f18/pull/614
Tree-same-pre-rewrite: false
It is common to get a pointer, check it is not null, and dereference it.
Sometimes that requires a named temporary just to be able to do the check.
The macro `DEREF(p)` provides this capability: it asserts that `p` is not null
and returns `*p`. This is analagous to `.value()` on an `std::optional`.
We might want to add a way to disable `CHECK` and the check in `DEREF` together.
This change also includes some examples of making use of `DEREF`.
Original-commit: flang-compiler/f18@d7aa90e55a
Reviewed-on: https://github.com/flang-compiler/f18/pull/608
- resolve-names.cc: I reworded the message when a name appears in a
locality-spec when a name is used that cannot appear in a variable
definition context.
- tools.cc: I removed the unused functions ```IsValueDummy()``` and
```IsModifiable()```. I made the function ```GetAssociatedVariable()```
static. I cleaned up the code in ```GetAssociationRoot()```. I cleaned up
the code in ```IsOrContainsEventOrLockComponent()```. I added a TODO to
```WhyNotModifiable()``` and made some other improvements to it.
- tools.h: Removed some deleted and unnecessary functions.
- I fixed up a couple of tests related to the changes in error messages.
Original-commit: flang-compiler/f18@47da8ff9c8
Reviewed-on: https://github.com/flang-compiler/f18/pull/596
- expression.cc - fixed an error message. This required changing the tests
structconst0[3,4].f90
- tools.[h,cc] - Added a new function called ```WhyNotModifiable()``` to see
if a name can be modified. This function returns a string that describes why
the name cannot be modified. I changed the existing function
```IsModifiable()``` to call ```WhyNotModifiable()```. I fixed and
restructured the code for ```GetAssociationRoot()```. This involved creating
the mutually recursive function ```GetAssociatedVariable()```. I added a
check to see if a name is an INTENT(IN) dummy argument to the function
```IsVariableName()```.
- resolve-names.cc - Wrote the function ```SayWithReason()``` that allows an
arbitrary message to be added to an existing message. I changed the code in
```PassesLocalityChecks()``` to call the new function ```WhyNotModifiable()```
to get the specifics of why a variable name cannot be used in a variable
modification context and then call the new function ```SayWithReason()``` to
report the error. I also cleaned up the code as per Jean's suggestion.
Original-commit: flang-compiler/f18@8a2f4bdfd2
Reviewed-on: https://github.com/flang-compiler/f18/pull/596
Tree-same-pre-rewrite: false
Specifically, these changes enforce the last sentence of the constraint, which
prohibits names that cannot appear in a variable definition context from
appearing in a locality-spec. Here are the details.
- Created the function "IsModifiableName" to return "true" when its parameter
is the name of a variable that can appear in a variable definition context.
- Created the function "GetAssociationRoot" to follow construct associations
to potentially get to an underlying variable. This function is similar to
the existing "GetUltimate" function that follows use associations and host
associations. One difference is that "GetAssociationRoot" requires access
to the types "MaybeExpr" and "SomeExpr", which makes is inappropriate to put
into symbol.cc, which is where "GetUltimate" lives. Perhaps we should move
"GetUltimate" to tools.[h,cc].
- Generalized the functions "IsPureFunction" to "IsPureProcedure" since either
a pure function or subroutine can provide a context for variables that
cannot be modified. Changed "FindPureFunctionContaining" to
"FindPureProcedueContaining" to go along with this.
- Added the function "IsExternalInPureContext" to detect the case where a
nominally pure procedure potentially modifies a variable.
- Created the function "IsOrContainsEventOrLockComponent" to detect variables
that either are of EVENT_TYPE or LOCK_TYPE or contain components of these
types. Such variables cannot appear in variable definition contexts.
- Added the test resolve56.f90 to test most of these conditions. Note that I
only tested the new code from the perspective of locality-specs.
Original-commit: flang-compiler/f18@c9d2507b74
Reviewed-on: https://github.com/flang-compiler/f18/pull/596
Tree-same-pre-rewrite: false
When the same generic is use-associated from two different modules,
they must be merged together into a symbol with GenericDetails.
After that merger, if there is a use association of the same name
with a non-generic we have to report an error. So save the UseDetails
from the original USE in GenericDetails so we can create the
appropriate UseErrorDetails.
Fixesflang-compiler/f18#586.
Original-commit: flang-compiler/f18@5067345f70
Reviewed-on: https://github.com/flang-compiler/f18/pull/591
Fix issue 598 and related issues.
Transform resolve-names.cc ConstructVisitor association_ member into a
stack so that different association construct (select-type, select-rank,
change-team, associate) imbrication/succession do not interfere with each
other leading to wrong erronous symbol resolution.
Original-commit: flang-compiler/f18@5781f29ed6
Reviewed-on: https://github.com/flang-compiler/f18/pull/600
Tree-same-pre-rewrite: false
Type-bound generic statements can have binding names that refer to
bindings that occur later in the type. So save a map of generic to
binding names and process them when we get to the end of the
type-bound procedure part. This is similar to how specific procedures
of generic identifiers are handled.
Also detect duplicate binding names for a type-bound generic.
Fixes issue flang-compiler/f18#572.
Original-commit: flang-compiler/f18@d58bb77cfa
Reviewed-on: https://github.com/flang-compiler/f18/pull/577
* The warning was already here, this commit only refactors things so that
it can be controled with -Mstandard.
* Also makes the warning point to the do-stmt and adds a note to the warning
pointing to the statements where it ends.
Original-commit: flang-compiler/f18@11e1eb6edd
Reviewed-on: https://github.com/flang-compiler/f18/pull/552
Tree-same-pre-rewrite: false
- Only allow out-of-scope label target for label-do-stmt
when the label is on an end-stmt of a scope directly nested
into the one of the label-do-stmt.
- Also transform label-do-stmt into non-label-do constructs
so that later phases do not have to handle label-do-stmt.
Original-commit: flang-compiler/f18@91cff2f296
Reviewed-on: https://github.com/flang-compiler/f18/pull/552
Tree-same-pre-rewrite: false
Change test scripts so that cmake passes in the path to the `f18`
that it just built. They no longer have to use relative paths.
Simplify argument passing in test scripts by sharing it in `common.sh`.
Move `if_arith01.f90`, `if_construct01.f90`, `if_stmt01.f90` to `ERROR_TESTS`.
As it was, nothing was being tested on them.
For `test_error.sh`, find the include directory relative to `f18` and
pass that in with a `-I` option. Eliminate the temporary definitions of
`iso_fortran_env`, `iso_c_binding`, `ieee_exceptions` in the tests
because the "real" ones are now available.
The tests that are run with `test_any.sh` could probably have similar
changes, but they are not part of this commit.
Original-commit: flang-compiler/f18@b62fe489be
Reviewed-on: https://github.com/flang-compiler/f18/pull/568
Generic operators and assignment have different rules than generic
names for their procedures being distinguishable.
Implement those rules in `DistinguishableOpOrAssign`. The rules are
considerably simpler: they must have the name number of dummy arguments
and at least one pair in the same position must be distinguishable.
Fixes issue flang-compiler/f18#563.
Original-commit: flang-compiler/f18@276bb08206
Reviewed-on: https://github.com/flang-compiler/f18/pull/576
Complete the checks for distinguishable specifics procedure in a generic
by considering any passed-object dummy arguments.
C1514 rule 3 is implemented and the checks for the other rules are
extended to consider the PASS attribute, including the concept of the
"effective" position of an argument in an argument list, computed by
ignoring passed-object arguments.
Add `pass` to `characteristics::DummyArgument` to mark each
passed-object dummy argument.
Change symbols to store the index of the passed-object dummy argument
rather than its symbol.
Check that specifics of a type-bound generic are distinguishable only
after all of the procedure bindings have been processed. They don't have
to be before the generic.
Original-commit: flang-compiler/f18@2751490f95
Reviewed-on: https://github.com/flang-compiler/f18/pull/567
* Examples of Composite and Combined constructs
2.8.3 Loop SIMD Construct
2.11.1 Parallel Loop Construct
2.11.3 Parallel Loop SIMD Construct
Not in the implementation:
2.8.3 DO SIMD: A list item may appear in a linear or firstprivate clause but not both
Original-commit: flang-compiler/f18@75d9c1a081
Reviewed-on: https://github.com/flang-compiler/f18/pull/558
In `OrderParameterNames` and `OrderParameterDeclarations` it was
always true that `this == &type.get<DerivedTypeDetails>()` which
meant that `this` was redundant.
So convert them to non-member functions in `tools.h` that get the
details from the symbol passed in. This makes life simpler for the
callers.
Original-commit: flang-compiler/f18@81710d4e6e
Reviewed-on: https://github.com/flang-compiler/f18/pull/559
Move these functions from scope.cc, symbol.cc, type.cc into tools.cc:
Scope::FindOrInstantiateDerivedType
Scope::InstantiateDerivedType
Scope::InstantiateIntrinsicType
Symbol::Instantiate
DerivedTypeSpec::ProcessParameterExpressions
DerivedTypeSpec::Instantiate
This eliminates some dependencies in these files on SemanticsContext,
FoldingContext, etc.
It also allows three of the functions to be private to tools.cc
because they are only called from the others.
Original-commit: flang-compiler/f18@48c6efbf95
Reviewed-on: https://github.com/flang-compiler/f18/pull/559
Tree-same-pre-rewrite: false
- Changed the name a a function to FindOrDeclareEnclosingEntity
- Changed that function to return a reference rather than a pointer
- Polished the setting of the IMPLICIT flag on a declared entity in a
locality-spec
- Changed a test to remove an unreported error
Original-commit: flang-compiler/f18@0c1a00d7c2
Reviewed-on: https://github.com/flang-compiler/f18/pull/551
Tree-same-pre-rewrite: false
Prior to this change, the compiler issued an error message when a name in a
SHARED locality-spec had not been declared explicitly in an enclosing scope.
Presumably, this was done to enforce constraint C1124. This constraint states
that "A variable-name in a locality-spec shall be the name of a variable in the
innermost executable construct or scoping unit that includes the DO CONCURRENT
statement". For LOCAL and LOCAL_INIT locality-spec's, we were automatically
creating a local variable in the situation where one had not been explicitly
declared rather than issuing an error message.
The only compiler I could find that implements the SHARED locality-spec was the
PGI compiler, which automatically creates a variable and does not emit an error
message. Also, @vdonaldson said that he had consulted with a member of the
Fortran standards committee who said that the correct thing was to create a
variable if necessary.
This change has the compiler creating a variable in the enclosing scope of a DO
CONCURRENT statement if necessary. I also changed a test to adapt to the new
behavior. I also consolidated the semantic checking for the constraints
associated with all of the locality-spec's.
Original-commit: flang-compiler/f18@d9253a76fc
Reviewed-on: https://github.com/flang-compiler/f18/pull/551
Tree-same-pre-rewrite: false
Straightforward implementation but not including:
* list-item on aligned clause
* nesting check with the ordered construct (parse tree changes needed!)
* list-item attributes check on aligned clause
Original-commit: flang-compiler/f18@cf04d8ad26
Reviewed-on: https://github.com/flang-compiler/f18/pull/554
These changes implement most of the requirements for C1128, which says: "A
variable-name that appears in a LOCAL or LOCAL_INIT locality-spec shall not
have the ALLOCATABLE; INTENT (IN); or OPTIONAL attribute; shall not be of
finalizable type; shall not be a nonpointer polymorphic dummy argument; and
shall not be a coarray or an assumed-size array. A variable-name that is not
permitted to appear in a variable definition context shall not appear in a
LOCAL or LOCAL_INIT locality-spec."
The changes do not implement the checking required to determine whether a
variable can appear in a "variable definition context".
Here's a summary of the changes:
- I created the function 'PassesLocalityChecks()' to enforce C1128 along with
C1124, C1125, and C1126.
- I cleaned up the code to check if a type or symbol is a coarray.
- I added functions to tools.[h,cc] to test if a symbol is OPTIONAL, INTENT
IN, finalizable, a coarray, or an assumed size array. Should these be
member functions of the type "Symbol"?
- Since I changed one of the locality related error messages, I needed to
change the test resolve35.f90.
- I added the test resolve55.f90 to test all of the checks implemented in this
update.
Original-commit: flang-compiler/f18@4ca5d090b9
Reviewed-on: https://github.com/flang-compiler/f18/pull/542
Tree-same-pre-rewrite: false
Most restrictions in 2.7.1 Loop construct, nesting checks are still on TODO list.
seenClauses (EnumSet) is dropped. A multimap clauseInfo is added to save the encountering clause and its parser tree node pointer (parser::OmpClause) and to do the checks after walking through all the clauses.
Original-commit: flang-compiler/f18@f797357682
Reviewed-on: https://github.com/flang-compiler/f18/pull/536
The constraint says that a variable-name in a locality-spec shall be the name
of a variable in the innermost executable construct or scoping unit that
includes the DO CONCURRENT statement. This check was already being made in
resolve-names.cc for LOCAL and LOCAL_INIT locality specs but not for the
SHARED locality spec. Also, there was some code in check-do.cc that was
intended to be used to enforce this constraint at some time in the future.
I added code to resolve-names.cc to extend the checking to the SHARED locality
spec and removed the unused code from check-do.cc. I also extended the
existing tests in resolve35.f90 to exercise the new code.
Original-commit: flang-compiler/f18@b421923d94
Reviewed-on: https://github.com/flang-compiler/f18/pull/533
Tree-same-pre-rewrite: false
There are no Clause 12 constraints to check for PRINT, but PRINT does share
FMT specifier processing with READ and WRITE. To avoid interactions between
these I/O statements, reset IoChecker values for PRINT.
Original-commit: flang-compiler/f18@6a54766718
Reviewed-on: https://github.com/flang-compiler/f18/pull/528
Change the CMakeFile.txt in tools/f18 to build the predefined modules with the just-built compiler. The mod files are created in the new "include" subdirectory of the binary target directory. The mod files are installed to ${CMAKE_INSTALL_PREFIX}/include.
The f18 driver is already installed in ${CMAKE_INSTALL_PREFIX}/bin. This change change the location of the f18 binary build to a sibling directory of "include" called "bin" instead of at the top level of the binary destination directory. This change is in anticipation of changing the driver to find the include directory using a path relative to the location of f18.
Update the test scripts to find f18 in the bin subdirectory.
Remove the simple predefined module tests from test/semantics because they are compiled as part of the build and don't need to be recompiled as part of a test.
Original-commit: flang-compiler/f18@7811ccecdc
Reviewed-on: https://github.com/flang-compiler/f18/pull/526
This patch is to show the framework to do OpenMP structure related check and you may find missing/incomplete implementation, which will be added in the future.
1. Each encountering construct has its own context and the context info will be filled while walking the directive/clause nodes. In the `Leave`, the current OpenMP context will be popped out.
2. When entering the construct, necessary nesting check will be performed. Use std::vector to implement the context stack because certain nesting restrictions may need to trace back more than one level.
3. PARALLEL construct is used as an example for clause validity check.
4. `EnumSet` is used to represent the directive/clause sets and to show the error msg. All the error msgs are quoted from the specification.
5. Necessary `CharBlock` is added for error msgs.
Original-commit: flang-compiler/f18@620441c03e
Reviewed-on: https://github.com/flang-compiler/f18/pull/493
* Clause 13 (Input/output editing) syntax and semantic checking
Diagnose:
- all clause syntax errors (independent of normal parsing)
- all clause constraints
- use of non-standard extensions under -Mstandard
- obvious program requirement violations
The code:
- is invoked for both format statement and I/O statement constant formats
- should be useable by the runtime I/O library for runtime formats
- is able to recover from errors
- is able to diagnose multiple errors in a single format
- has accurate markers for errors
- can process (fixed character size) Hollerith strings
- generates reasonable error messages for known error scenarios
- should not require C++ run-time library support
The code is templatized for use with fixed size character kind={1,2,4} input,
but only the kind=1 variant is actually exercised.
* Review update.
* Review update.
* Review update.
* Improve error processing of unterminated formats.
Original-commit: flang-compiler/f18@c04b7518df
Reviewed-on: https://github.com/flang-compiler/f18/pull/498
The passed-object dummy argument cannot be checked until the
interfaces of contained subprograms are known. To accomplish this,
add `FinishSpecificationPart` pass to run after all specification
parts have been analyzed but before any of the execution parts.
This visits all derived types defined in each scope and performs
the checks on each procedure component and procedure binding.
Add a flag to `ParamValue` to distinguish kind from len parameters.
Fix some tests that had errors we now detect.
Original-commit: flang-compiler/f18@4789643c5b
Reviewed-on: https://github.com/flang-compiler/f18/pull/521
Add `passArg` to `ProcEntityDetails` and `ProcBindingDetails`.
The is the symbols that represents the passed-object dummy argument,
or nullptr if none.
As both of these classes need `passName` and `passArg`, create a mixin
class, `WithPassArg` for the shared content.
Change passName_ from optional to pointer because that makes it a little
easier to work with and there is no need to have a copy of the name.
Original-commit: flang-compiler/f18@1cdd1a5b87
Reviewed-on: https://github.com/flang-compiler/f18/pull/521
Tree-same-pre-rewrite: false
Add an `AsFortran()` member function to `DeclTypeSpec` and related
classes to convert types to a Fortran representation. This allows
error messages to mention types. It also fixes `.mod` file writing
where it previous used `operator<<` to convert types to Fortran.
Original-commit: flang-compiler/f18@eb16f8b5dd
Reviewed-on: https://github.com/flang-compiler/f18/pull/521
Tree-same-pre-rewrite: false
If a name is declared in a module with just `private :: x`,
we don't know if `x` is supposed to be an object or procedure,
so it ends up not getting an implicit type. This leads to an
internal error when writing the `.mod` file.
The fix requires two changes:
1. Cause all `EntityDetails` to be converted to `ObjectEntityDetails`
in `ResolveSpecificationParts`. This is done by calling `PopScope()`.
The reason for not calling it there no longer applies since the
addition of the `ExecutionPartSkimmer` pass.
2. In the same place, apply the implicit typing rules to every entity
in the scope.
Fixesflang-compiler/f18#514, fixesflang-compiler/f18#520.
Original-commit: flang-compiler/f18@7e4185e9ff
Reviewed-on: https://github.com/flang-compiler/f18/pull/524
I changed two things in the messages produced for DO semantic checks --
- I changed the source location to be specific to where conflicting names are
declared.
- I added the conflicting names to the message.
Original-commit: flang-compiler/f18@f39f9ceeae
Reviewed-on: https://github.com/flang-compiler/f18/pull/510
In the example below, the compiler gets an internal error when
processing the derived-type-spec for the declaration of `x`.
When the search for type parameter `k` fails it means an error
has already occurred and we should skip that parameter.
```
type :: t(k)
end type
type(t):: x
end
```
Original-commit: flang-compiler/f18@a4bf1922e5
Reviewed-on: https://github.com/flang-compiler/f18/pull/509
Here's a summary of the changes:
- I renamed a function to ResolveControlExpressions for clarity.
- I changed the interface to the function to ResolveIndexName for clarity.
- I simplified the code for walking the "step" and scalar mask expressions in
a DO CONCURRENT control statements to not check for the presence of optional
expressions.
- I added "const" to the declaration of a local variable.
- I removed some spurious comments from the test dosemantics04.f90.
- I added two new tests to dosemantics04.f90 to verify cases that were not
covered in my original test implementation.
Original-commit: flang-compiler/f18@fa5827061a
Reviewed-on: https://github.com/flang-compiler/f18/pull/504
Tree-same-pre-rewrite: false
CONCURRENT header not reference names declared in the same header. To
implement this, I changed the "Pre" function for ConcurrentHeader to walk the
subtree in an order that caused the variables associated with the declared
names to be created before any of the expressions were walked.
I added the test dosemantics04.f90 to test this.
Original-commit: flang-compiler/f18@9f3b552414
Reviewed-on: https://github.com/flang-compiler/f18/pull/504
Tree-same-pre-rewrite: false
test_symbols.sh and test_folding.sh were running the compiler in the
test directory (e.g. `<build>/test/semantics`). This meant that .mod
files were being left there because they weren't cleaned up.
Change to run the compiler in the temp directory created for each test.
It is deleted at the end so files aren't left behind.
Original-commit: flang-compiler/f18@4f9735ada7
Reviewed-on: https://github.com/flang-compiler/f18/pull/506
Interface blocks can be nested if one of the interface bodies
declares a subprogram with a dummy procedure that is specified
by an interface block. See the addition to `modfile07.f90` for
and example.
This didn't work because there was only one copy of each of
`inInterfaceBlock_`, `isAbstract_`, and `genericSymbol_`.
We need these for each active interface block, so replace these
with a stack. A new entry is pushed on the stack when we enter
an `InterfaceStmt` or `GenericStmt` and popped when we leave.
Also in the same example, when declaring the dummy procedure, the
dummy argument is initially an `EntityDetails` but it is replaced
by a `SubprogramDetails` when it is specified by the interface.
Original-commit: flang-compiler/f18@0c468b60b1
Reviewed-on: https://github.com/flang-compiler/f18/pull/502
A substring of an array element is legal as an equivalence object,
e.g. `a(2,3)[4:5]`. Extend `EquivalenceObject` to include the start
of the substring, if any. Split `CheckBound` into `CheckArrayBound`
and `CheckSubstringBound`.
When evaluating bounds in `AddToSet` we can assert they are constant
because all of the error cases should have been detected already.
Original-commit: flang-compiler/f18@0b4050b2d5
Reviewed-on: https://github.com/flang-compiler/f18/pull/494
Collect sets of `parser::EquivalenceObject` to process at the end of
the specification part. This is so that names mentioned in the
EQUIVALENCE statement don't trigger implicit declarations.
The `EquivalenceSets` class performs most of the numerous checks
on objects that can be in equivalence sets at all and objects that
can be in them together. It also merges sets when the same object
appears in more than one.
Once equivalence sets are checked they are added to the `Scope`.
Further checks will be necessary after the size and alignment of
variables are computed.
Add `FindUltimateComponent` to simplify checks on ultimate components
of derived types. Use it to implement `HasCoarrayUltimateComponent`
and checks on equivalence objects.
Make `ExpressionAnalyzer::Analyze(Designator)` public so that
`parser::EquivalenceObject` can be analyzed.
Add `GetDefaultKind`, `doublePrecisionKind`, and `quadPrecisionKind`
to `SemanticsContext` so that `defaultKinds_` does not need to be
accessed directly.
Original-commit: flang-compiler/f18@1cc898e5b8
Reviewed-on: https://github.com/flang-compiler/f18/pull/494
Tree-same-pre-rewrite: false
variable and initial, final, and step expressions.
Here's a summary of the changes since my original pull request:
- I've taken into account the possibility that the DO variable is declared in
a MODULE. This required a call to GetUltimate() on the Symbol for the DO
variable.
- The previous change exposed problems in the semantic checking for NULLIFY
and DEALLOCATE statements, so I've included fixes and tests for those. I
also added a test for the ALLOCATE statement, even though it was already
handling this case.
- I now handle the case where a procedure name is erroneously used as a DO variable.
- I now handle the case where a pointer to a procedure is erroneously used as
a DO variable.
- I now check that the DO expressions are not null.
- I added tests for all cases listed above.
Original-commit: flang-compiler/f18@219d856fdb
Reviewed-on: https://github.com/flang-compiler/f18/pull/478
Tree-same-pre-rewrite: false
Specifically, that the conversion of warnings to errors will happen in a
single place in the compiler once we implement warnings as distinct from
errors. This change made on of the tests invalid.
Also, there's no need to check whether the extension to allow
REAL DO controls is enabled.
Original-commit: flang-compiler/f18@2fae9edd77
Reviewed-on: https://github.com/flang-compiler/f18/pull/478
Tree-same-pre-rewrite: false
parse-tree.cc
- Cleaned up the use of "const" in several declarations.
check-do-stmt.cc
- Replaced uses of parser::Messages with SemanticsContext.
- Removed unused "==" operator from the DoStmtContext class.
- Reduced the size of the GetBounds function by calling GetLoopControl().
- Changed the warning message for REAL DO controls to not mention standard
extensions.
check-do-stmt.h
- Restored the forward reference to Fortran::parser::DoConstruct and removed
the include of parse-tree.h
dosemantics*.f90
- Removed extraneous references to the "RUN" command.
test_errors.sh
- Simplified and generalized the extraction of the OPTIONS specification.
Original-commit: flang-compiler/f18@04a0712766
Reviewed-on: https://github.com/flang-compiler/f18/pull/478
Tree-same-pre-rewrite: false
and initial, final, and step expressions. As a new extension, we want to allow
REAL and DOUBLE PRECISION values for them by default.
Here's a summary of the changes:
- There already existed infrastructure for semantic checking of DO loops that
was partially specific to DO CONCURRENT loops. Because I re-used some of
this infrastructure, I renamed some files and classes from "concurrent" to
"stmt".
- I added some functions to distinguish among the different kinds of DO
statements.
- I added the functions to check-do-stmt.cc to produce the necessary warnins
and errors. Note that there are no tests for the warnings since the
necessary testing infrastructure does not yet exist.
- I changed test-errors.sh so that additional compilation options can be
specified in the test source.
- I added two new tests to test for the various kinds of values that can be
used for the DO variables and control expressions. The two tests are
identical except for the use of different compilation options.
dosemantics03.f90 specifies the options "-Mstandard -Werror" to produce
error messages for the use of REAL and DOUBLE PRECISION DO variables and
controls. dosemantics04.f90 uses the default options and only produces
error messages for contructs that are erroneous by default.
Original-commit: flang-compiler/f18@f484660c75
Reviewed-on: https://github.com/flang-compiler/f18/pull/478
Tree-same-pre-rewrite: false
In a function without a function result specified, the name in the
`FunctionStmt` was resolved to the function result symbol rather than
the function symbol itself. That is inconsistent with subroutines and
other functions.
The fix is to explicitly set the function name symbol after the result
has been resolved.
Original-commit: flang-compiler/f18@b0172d3284
Reviewed-on: https://github.com/flang-compiler/f18/pull/487
There were a couple of small incompatibilities:
- There is no `ldd` on MacOS; instead use `otools -L`.
This has not been tested when libpgmath is linked in to f18.
- `wc` outputs spaces where on Linux it outputs tabs; change how
the number of lines is extracted to work on both.
Also, fix a bug: change `passed_warnings` to `$passed_warnings`.
Original-commit: flang-compiler/f18@5bede9e188
Reviewed-on: https://github.com/flang-compiler/f18/pull/475
more fixes
Access components of constant structures
Apply implicit typing to dummy args used in automatic array dimensions
SELECTED_INT_KIND and SELECTED_REAL_KIND
Finish SELECTED_{INT,REAL}_KIND and common cases of ALL()/ANY()
Original-commit: flang-compiler/f18@e9f8e53e55
Reviewed-on: https://github.com/flang-compiler/f18/pull/472
Tree-same-pre-rewrite: false
- Add location to non-fatal error message (context was not given
a location before folding in semantics).
- Avoid refolding expression from scratch several times (update GenericExprWrapper
after folding). So far, warning messages were generated twice per parametere init
expressions.
Original-commit: flang-compiler/f18@bf7f6cf9cd
Reviewed-on: https://github.com/flang-compiler/f18/pull/468
Tree-same-pre-rewrite: false
checkpoint: changes build, tests all pass
many fixes, ready to test more
Further CLASS(*) support
More fixes for CLASS(*)
Hide data members of DynamicType
implement PRESENT() intrinsic
Original-commit: flang-compiler/f18@044ba12c20
Reviewed-on: https://github.com/flang-compiler/f18/pull/466
Tree-same-pre-rewrite: false
Use better names for template parameters of `LoopBounds`, and also
for the constructor arguments.
Use two overloadings of `loopBounds()` instead of `std::is_same_v<>`.
Original-commit: flang-compiler/f18@a2c0c75462
Reviewed-on: https://github.com/flang-compiler/f18/pull/455
Tree-same-pre-rewrite: false
It is a common extension to allow DO loops with REAL variable and
bounds. The parse tree currently parses those with the variable
as `scalar-int-variable-name` and the bounds as `scalar-int-expr`.
That causes the INTEGER constraint to be enforced automatically.
Change the grammar and parse tree to treat them as `scalar-variable-name`
and `scalar-expr`. This allows the name and expression to be REAL,
but we will have to verify that they aren't any other type (in a future
change).
To accomplish this, add a template parameter to `LoopBounds` for the type
of the variable name (always `Scalar<Name>` or `Scalar<Integer<Name>>`).
We sometimes need names for the instantiations of `LoopBounds` so add
type aliases like `LoopControl::Bounds` for each one.
Original-commit: flang-compiler/f18@d75aa03970
Reviewed-on: https://github.com/flang-compiler/f18/pull/455
Tree-same-pre-rewrite: false
1. typo and trailing spaces within OpenMP-4.5-grammar.txt
2. parse (openmp-grammar.h) and unparse(unparse.cc) for:
SCHEDULE ([modifier [, modifier]:]kind[, chunk_size])
Modifier -> MONITONIC | NONMONOTONIC | SIMD
where ":" is optional except at least one modifier is present.
Original-commit: flang-compiler/f18@5cebae5039
Reviewed-on: https://github.com/flang-compiler/f18/pull/453
Preserve generated strings until consumed by formatting.
bugfix from premature push
Address review comments
Last fix(?)
Use %s formatting for CharBlocks and strings
Use new formatting and fix usage of std::forward<>()
Use forward_list rather than vector to save strings
Original-commit: flang-compiler/f18@8ea478420f
Reviewed-on: https://github.com/flang-compiler/f18/pull/444
Tree-same-pre-rewrite: false
Change the order in which names are resolved. Before resolving names
in the execution part of a subprogram we need to know the interface
of contained subprograms. This is because the type of some construct
entities can depend on the return type of contained functions, e.g.
```
associate(x => f())
end associate
contains
function f()...
```
To do this, we now build a tree rooted at each program unit with
child nodes corresponding to subprograms contained in the parent.
This provides flexibility in choosing an order to resolve names.
The current implementation processes all specification parts before
any execution parts. This ensures contained subprogram interfaces
are know before analyzing constructs like ASSOCIATE.
Resolving a specification part involves first adding
`SubprogramNameDetails` symbols for each contained subprogram, then
processing the statement that introduces the program unit (`ModuleStmt`,
`SubroutineStmt`, etc.), then visiting all of the statements in the
specification part.
If it proves necessary, we can add a phase to do implicit declarations
in the execution part before processing the specification part of
contained subprograms.
Original-commit: flang-compiler/f18@20e803fd92
Reviewed-on: https://github.com/flang-compiler/f18/pull/443
Tree-same-pre-rewrite: false
Previously we maintained a stack of ImplicitRules in parallel with
the Scope stack. Change to maintaining a mapping from Scope to
ImplicitRules.
This makes things simpler in some cases: Block scopes don't have their
own implicit rules. And submodule scopes aren't just pushed and popped.
This will also help with future changes to the order in which scopes
are processed.
Original-commit: flang-compiler/f18@443da50352
Reviewed-on: https://github.com/flang-compiler/f18/pull/443
Tree-same-pre-rewrite: false
Use std::unique_ptr<> with custom deleter for forward-referenced owned pointer.
Move CopyableIndirection into common, add documentation, clean up.
Remove OwningPointer and ForwardReference
Use std::unique_ptr<> with custom deleter for forward-referenced owned pointer.
Use CopyableIndirection
clean up from merge after split
Complete characterization
fold conversions of arrays
Clean up subscripts to constant arrays
Elemental unary operations complete
Support assumed type TYPE(*) in actual arguments
clean up some TODOs
recognize TYPE(*) arguments to intrinsics
Complete folding of array operations
Finish elementwise array folding, add test, debug
characterize intrinsics, fix some bugs
Clean up build
Type compatibility and shape conformance checks on pointer assignments
Original-commit: flang-compiler/f18@99d734c621
Reviewed-on: https://github.com/flang-compiler/f18/pull/442
Tree-same-pre-rewrite: false
* Clause 12 semantics
Check all constraints not otherwise checked during parsing or label scope
validation, except for C1201, C1231, and C1233-5. Obvious program
requirements are also checked, except for 12.6.2.2 constant format string
validation.
Original-commit: flang-compiler/f18@e4ec343618
Reviewed-on: https://github.com/flang-compiler/f18/pull/427
When a StmtFunctionStmt was rewritten as an array element assignment
the subscripts were not getting correct source locations. They need
to be copied from the function args.
Also, the entire array element expression (e.g. `a(i)`) did not have a
source position. This was tricky because there is no source position
in the original parse that matches what we need. So we take the source
position from the beginning of the function name to the end of the last
arg and extend it one more character to include the closing parenthesis.
Change `ActualArgToExpr()` to return `Expr` rather than
`std::optional<Expr>` because callers always call `.value()` on the
result anyway.
Add `WithSource()` utility to update the `source` data member of a
parse tree node.
This bug shows up as incorrect source positions for error messages. For
example, in this program the error (due to real subscript) did not have
a source position:
```
real :: a(10), x, y
a(x) = y
end
```
Original-commit: flang-compiler/f18@a9bcf68ceb
Reviewed-on: https://github.com/flang-compiler/f18/pull/433
In the parse tree dumper, add a compile-time option to dump source
locations for all nodes that have them. This is a useful way to check
if they are correct, especially after parse tree rewrites.
It is enabled by defining `SHOW_ALL_SOURCE_MEMBERS` in `dump-parse-tree.h`.
Original-commit: flang-compiler/f18@ceae5632e2
Reviewed-on: https://github.com/flang-compiler/f18/pull/433
Tree-same-pre-rewrite: false
When an error occurs in name resolution, continue semantic processing
in order to detect other errors. This means we can no longer assume
that every `parser::Name` has a symbol even after name resolution
completes. In `RewriteMutator`, only report internal error for unresolved
symbol if there have been no fatal errors.
Add `Error` flag to `Symbol` to indicate that an error occcurred related
to it. Once we report an error about a symbol we should avoid reporting
any more to prevent cascading errors. Add `HasError()` and `SetError()`
to simplify working with this flag.
Change some places that we assume that a `parser::Name` has a non-null
symbol. There are probably more.
`resolve-names.cc`: Set the `Error` flag when we report a fatal error
related to a symbol. (This requires making some symbols non-const.)
Remove `CheckScalarIntegerType()` as `ExprChecker` will take care of
those constraints if they are expressed in the parse tree. One exception
to that is the name in a `ConcurrentControl`. Explicitly perform that
check using `EvaluateExpr()` and constraint classes so we get consistent
error messages.
In expression analysis, when a constraint is violated (like `Scalar<>`
or `Integer<>`), reset the wrapped expression so that we don't assume it
is valid. A `GenericExprWrapper` holding a std::nullopt indicates error.
Change `EnforceTypeConstraint()` to return false when the constraint
fails to enable this.
check-do-concurrent.cc: Reorganize the Gather*VariableNames functions
into one to simplify the task of filtering out unresolved names. Remove
`CheckNoDuplicates()` and `CheckNoCollisions()` as those checks is
already done in name resolution when the names are added to the scope.
Original-commit: flang-compiler/f18@bcdb679405
Reviewed-on: https://github.com/flang-compiler/f18/pull/429
Tree-same-pre-rewrite: false
This used to work but broke due to coarray spec changes.
The fix is to extend AnalyzeArraySpec to work on ComponentArraySpec
and to call it when we encounter one.
modfile24.f90 tested this case but had the wrong expected results.
Thanks to Jean for finding this.
Original-commit: flang-compiler/f18@7ef4c28a61
Reviewed-on: https://github.com/flang-compiler/f18/pull/430
Tree-same-pre-rewrite: false
ExprRef never returns a null pointer so change it to return a reference.
Add overloading for parser::Variable as they now also hold a typedExpr.
Change some of the functions that the result of ExprRef is passed to so
that they take references instead of pointers.
Original-commit: flang-compiler/f18@2cdab6b166
Reviewed-on: https://github.com/flang-compiler/f18/pull/424
When an Expr or Variable is analyzed, always fill in a GenericExprWrapper
for it. That now holds the result of expression analysis which is
std::nullopt when there is an error.
After the ExprChecker pass has finished, the typedExpr data member of
Variables and top-level Exprs should be filled in. Assert that is the
case when we access them.
Original-commit: flang-compiler/f18@192a4e0855
Reviewed-on: https://github.com/flang-compiler/f18/pull/424
Tree-same-pre-rewrite: false
Change statement semantics to continue with checks after an error
in expression analysis. This allows the compiler to report more
compilation errors. It requires that statement semantics not assume
that every parser::Expr has a valid evaluate::Expr.
For example, the test cases in coarrays02.f90 can now be moved to
coarrays01.f90. Previously the errors like "Must be a scalar value"
from ExprChecker prevented other errors from being detected by
CoarrayChecker.
Change to a stable sort of messages so that they come out in a
deterministic order. Otherwise when there are two errors at the
same location (e.g. line 71 of coarrays01.f90) the test can fail
randomly.
Original-commit: flang-compiler/f18@f420d21909
Reviewed-on: https://github.com/flang-compiler/f18/pull/422
Tree-same-pre-rewrite: false
Use GetExpr in checker classes to get analyzed expressions out of parse
tree nodes. Don't assume that they are always present. Change the
utility functions in tools.h to use SomeExpr rather than
GenericExprWrapper.
Original-commit: flang-compiler/f18@594e30d462
Reviewed-on: https://github.com/flang-compiler/f18/pull/422
Tree-same-pre-rewrite: false
Expression analysis enforces constraints implied by the grammar,
for example scalar-expr, scalar-int-expr, etc. These no longer need
to be checked during statement semantics.
Original-commit: flang-compiler/f18@35330b9a85
Reviewed-on: https://github.com/flang-compiler/f18/pull/422
Tree-same-pre-rewrite: false
Add typedExpr data member to Variable like that in Expr.
When expression analysis analyzed a Variable it stores the
resulting evaluate::Expr there.
Add GetExpr overloads in semantics/tools.h for using in statement
semantics. It gets an evaluate::Expr from an Expr, Variable, or
wrapper around one of those. It returns a const pointer so that
clients cannot modify the cached expression (and copies do not
have to be made).
Change CoarrayChecker to make use of GetExpr. It will eventually
replace all references to typedExpr in statement semantics.
Original-commit: flang-compiler/f18@b02a41efe1
Reviewed-on: https://github.com/flang-compiler/f18/pull/422
Tree-same-pre-rewrite: false
This commit introduces a new checker (StopChecker) for STOP
and ERROR STOP Fortran statements along with a test code.
Signed-off-by: Paul Osmialowski <pawel.osmialowski@arm.com>
Original-commit: flang-compiler/f18@c554174562
Reviewed-on: https://github.com/flang-compiler/f18/pull/367
Tree-same-pre-rewrite: false
When analyzing a function call in an expression we weren't properly
recognizing a ProcedureDesignator that was the name of an internal
or module function, i.e. a symbol with SubprogramDetails.
The fix is to add IsProcedure to identify symbols that correspond
to procedures. IsFunction and GetType also need to be extended to
handle this case.
Fixesflang-compiler/f18#391.
Original-commit: flang-compiler/f18@f165f8d38c
Reviewed-on: https://github.com/flang-compiler/f18/pull/417
Tree-same-pre-rewrite: false
Add CoarrayChecker to check for valid team-value in CHANGE TEAM,
SYNC TEAM, and image selector. Check that coarray names and selector
names are distinct in CHANGE TEAM.
Resolve the variable in a coarray-association.
Create a scope for the construct entities of a CHANGE TEAM construct.
Add ResolveSelector to resolve a parser::Selector into an Expr and
optional variable name (and a source location for messages). Make use of
ResolveSelector to handle coarray-association, as well as it's previous
use in associate-stmt.
Improve the check for C1157 in select-type-stmt and add a test.
Add a test for "Associate name must have a type".
Move ResolveName, ResolveDataRef, etc. from ResolveNamesVisitor
to DeclarationVisitor so that they are available in ConstructVisitor
as well. Add ResolveVariable and ResolveDesignator.
In the parse tree, change TeamValue from a type alias to a wrapper
class. We already had a wrapper class anyway, ImageSelectorSpec::Team,
so the new TeamValue can be used instead. This allows the member
of ImageSelectorSpec to be treated like other occurrences of TeamValue.
Original-commit: flang-compiler/f18@f856744b54
Reviewed-on: https://github.com/flang-compiler/f18/pull/414
Tree-same-pre-rewrite: false
so it can never be null. The condition should be
scope->kind() != Scope::Kind::Global.
And clang-format.
Original-commit: flang-compiler/f18@b686ab548a
Tree-same-pre-rewrite: false
A simple name in a `Designator` is always parsed as a `DataRef`, not
an `ObjectName`. So remove that alternative.
`StmtFunctionStmt::ConvertToAssignment` was creating a `Designator` with
that alternative: change it to do the same thing as the parser.
Add `GetSimpleName` utility functions to check if an `Expr` or `Variable`
represents a simple name. Many of the places that checked for `ObjectName`
in `Designator` are trying to do that.
Clean up includes and forward declarations in `tools.h`.
Original-commit: flang-compiler/f18@97d44de7b1
Reviewed-on: https://github.com/flang-compiler/f18/pull/410
indirection.h: Doesn't need ../common because it is in common.
expression.h: ../lib is the wrong path but the includes are needed.
They were probably coming in indirectly through other includes.
token-parsers.h: Include was not needed and parser shouldn't have
dependency on evaluate.
Original-commit: flang-compiler/f18@86f6b0023d
Reviewed-on: https://github.com/flang-compiler/f18/pull/405
When expressions are parsed iteratively they weren't getting the correct
source positions. For example, when parsing an `add-operand` as a sequence
of `mult-operand`s separated by `mult-op`.
This shows up when we report an error message referring to this kind
of expression:
```
t.f90:1:11: error: Expected a LOGICAL expression
if (i * j * k) then
^^^
```
The fix is to remember the location of the first operand and then
for each sub-expression (`i * j` and `i * j * k` in this example)
extend its location back to include that first operand.
Original-commit: flang-compiler/f18@e276f11f48
Reviewed-on: https://github.com/flang-compiler/f18/pull/395
the symbol from the result of expression analysis. (This opens the
door to moving structure component semantic checking to expression
analysis.)
Also, improve error messages, remove unused include files, and add
copyright headers to test files.
Original-commit: flang-compiler/f18@17780c40d7
Reviewed-on: https://github.com/flang-compiler/f18/pull/388
legality check is up to the user; however, some checks could
be done at compile time and others at runtime. We choose to
skip any checking at compile time because it would not be
complete.
Note the instantiation of ExtractDataRef in expressions.cc.
This instantiation satifies the reference in check-nullify.cc
because expression.h just has a declaration of ExtractDataRef
instead of the definition.
Original-commit: flang-compiler/f18@b7199219fb
Reviewed-on: https://github.com/flang-compiler/f18/pull/388
Tree-same-pre-rewrite: false
Everywhere we had `team-variable` except for the FORM TEAM statement is
now `team-value`, according to the N2162 draft standard. The grammar
and parse tree are updated to reflect that.
The addition of the production for `team-value` caused productions
R1177-R1181 to have their numbers increased by one.
Original-commit: flang-compiler/f18@9071f0a352
Reviewed-on: https://github.com/flang-compiler/f18/pull/387
A coarray is represented as a `Symbol` with `ObjectEntityDetails` that
has a non-empty coshape. The coshape is represented using the same type
(`ArrayShape`) as the shape is, so the fact that it is a coshape is
determined from context.
Move code for analyzing shapes to `resolve-names-utils.cc` and
generalize it for coshapes.
In `symbol.cc` add dumping of coshapes. Simplify some of the functions
by adding some `Dump*` functions to handle common cases.
In `mod-file.cc` generalize the code for writing shapes to also write
coshapes. Fix a bug in `PutShapeSpec()`.
Original-commit: flang-compiler/f18@9d2482c40c
Reviewed-on: https://github.com/flang-compiler/f18/pull/384
Tree-same-pre-rewrite: false
Tim Keith