mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-23 21:01:08 +00:00
0d4a611a04
MozReview-Commit-ID: AXrQEjWzxvg --HG-- extra : rebase_source : bf972fbb22648af2edbb756eb899ebddf8444dbc
64 lines
2.6 KiB
C++
64 lines
2.6 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef VariableUsageHelpers_h__
|
|
#define VariableUsageHelpers_h__
|
|
|
|
#include "plugin.h"
|
|
|
|
/// Returns a list of the statements where the given declaration is used as an
|
|
/// rvalue (within the provided function).
|
|
///
|
|
/// WARNING: incomplete behaviour/implementation for general-purpose use outside
|
|
/// of escapesFunction(). This only detects very basic usages (see
|
|
/// implementation for more details).
|
|
std::vector<const Stmt *> getUsageAsRvalue(const ValueDecl *ValueDeclaration,
|
|
const FunctionDecl *FuncDecl);
|
|
|
|
/// This is the error enumeration for escapesFunction(), describing all the
|
|
/// possible error cases.
|
|
enum class EscapesFunctionError {
|
|
ConstructorDeclNotFound = 1,
|
|
FunctionDeclNotFound,
|
|
FunctionIsBuiltin,
|
|
FunctionIsVariadic,
|
|
ExprNotInCall,
|
|
NoParamForArg,
|
|
ArgAndParamNotPointers
|
|
};
|
|
|
|
/// Required by the std::error_code system to convert our enum into a general
|
|
/// error code.
|
|
std::error_code make_error_code(EscapesFunctionError);
|
|
|
|
/// Returns a (statement, decl) tuple if an argument from an argument list
|
|
/// escapes the function scope through globals/statics/other things. The
|
|
/// statement is where the value escapes the function, while the declaration
|
|
/// points to what it escapes through. If the argument doesn't escape the
|
|
/// function, the tuple will only contain nullptrs.
|
|
/// If the analysis runs into an unexpected error or into an unimplemented
|
|
/// configuration, it will return an error_code of type EscapesFunctionError
|
|
/// representing the precise issue.
|
|
///
|
|
/// WARNING: incomplete behaviour/implementation for general-purpose use outside
|
|
/// of DanglingOnTemporaryChecker. This only covers a limited set of cases,
|
|
/// mainly in terms of arguments and parameter types.
|
|
ErrorOr<std::tuple<const Stmt *, const Decl *>>
|
|
escapesFunction(const Expr *Arg, const FunctionDecl *FuncDecl,
|
|
const Expr *const *Arguments, unsigned NumArgs);
|
|
|
|
/// Helper function taking a call expression.
|
|
ErrorOr<std::tuple<const Stmt *, const Decl *>>
|
|
escapesFunction(const Expr *Arg, const CallExpr *Call);
|
|
|
|
/// Helper function taking a construct expression.
|
|
ErrorOr<std::tuple<const Stmt *, const Decl *>>
|
|
escapesFunction(const Expr *Arg, const CXXConstructExpr *Construct);
|
|
|
|
/// Helper function taking an operator call expression.
|
|
ErrorOr<std::tuple<const Stmt *, const Decl *>>
|
|
escapesFunction(const Expr *Arg, const CXXOperatorCallExpr *OpCall);
|
|
|
|
#endif
|