office-gobmx/idlc/inc/astexpression.hxx
Stephan Bergmann 7e403195e5 Introduce o3tl::optional as an alias for std::optional
...with a boost::optional fallback for Xcode < 10 (as std::optional is only
available starting with Xcode 10 according to
<https://en.cppreference.com/w/cpp/compiler_support>, and our baseline for iOS
and macOS is still Xcode 9.3 according to README.md).  And mechanically rewrite
all code to use o3tl::optional instead of boost::optional.

One immediate benefit is that disabling -Wmaybe-uninitialized for GCC as per
fed7c3deb3 "Slience bogus
-Werror=maybe-uninitialized" should no longer be necessary (and whose check
happened to no longer trigger for GCC 10 trunk, even though that compiler would
still emit bogus -Wmaybe-uninitialized for uses of boost::optional under
--enable-optimized, which made me ponder whether this switch from
boost::optional to std::optional would be a useful thing to do; I keep that
configure.ac check for now, though, and will only remove it in a follow up
commit).

Another longer-term benefit is that the code is now already in good shape for an
eventual switch to std::optional (a switch we would have done anyway once we no
longer need to support Xcode < 10).

Only desktop/qa/desktop_lib/test_desktop_lib.cxx heavily uses
boost::property_tree::ptree::get_child_optional returning boost::optional, so
let it keep using boost::optional for now.

After a number of preceding commits have paved the way for this change, this
commit is completely mechanical, done with

> git ls-files -z | grep -vz -e '^bin/find-unneeded-includes$' -e '^configure.ac$' -e '^desktop/qa/desktop_lib/test_desktop_lib.cxx$' -e '^dictionaries$' -e '^external/' -e '^helpcontent2$' -e '^include/IwyuFilter_include.yaml$' -e '^sc/IwyuFilter_sc.yaml$' -e '^solenv/gdb/boost/optional.py$' -e '^solenv/vs/LibreOffice.natvis$' -e '^translations$' -e '\.svg$' | xargs -0 sed -i -E -e 's|\<boost(/optional)?/optional\.hpp\>|o3tl/optional.hxx|g' -e 's/\<boost(\s*)::(\s*)(make_)?optional\>/o3tl\1::\2\3optional/g' -e 's/\<boost(\s*)::(\s*)none\>/o3tl\1::\2nullopt/g'

(before committing include/o3tl/optional.hxx, and relying on some GNU features).
It excludes some files where mention of boost::optional et al should apparently
not be changed (and the sub-repo directory stubs).  It turned out that all uses
of boost::none across the code base were in combination with boost::optional, so
had all to be rewritten as o3tl::nullopt.

Change-Id: Ibfd9f4b3d5a8aee6e6eed310b988c4e5ffd8b11b
Reviewed-on: https://gerrit.libreoffice.org/84128
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
2019-12-01 14:57:16 +01:00

139 lines
4.6 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_IDLC_INC_ASTEXPRESSION_HXX
#define INCLUDED_IDLC_INC_ASTEXPRESSION_HXX
#include <sal/config.h>
#include <memory>
#include "idlc.hxx"
#include <o3tl/optional.hxx>
// Enum to define all the different operators to combine expressions
enum class ExprComb
{
Add, // '+'
Minus, // '-'
Mul, // '*'
Div, // '/'
Mod, // '%'
Or, // '|'
Xor, // '^'
And, // '&'
Left, // '<<'
Right, // '>>'
UPlus, // unary '+'
UMinus, // unary '-'
NONE, // No operator (missing)
Symbol // a symbol (function or constant name)
};
// Enum to define expression type
enum ExprType
{
ET_short, // Expression value is short
ET_ushort, // Expression value is unsigned short
ET_long, // Expression value is long
ET_ulong, // Expression value is unsigned long
ET_hyper, // Expression value is hyper (64 bit)
ET_uhyper, // Expression value is unsigned hyper
ET_float, // Expression value is 32-bit float
ET_double, // Expression value is 64-bit float
ET_char, // Expression value is char
ET_byte, // Expression value is byte
ET_boolean, // Expression value is boolean
ET_string, // Expression value is char *
ET_any, // Expression value is any of above
ET_void, // Expression value is void (absent)
ET_type, // Expression value is type
ET_none // Expression value is missing
};
// Structure to describe value of constant expression and its type
struct AstExprValue
{
union
{
sal_uInt8 byval; // Contains byte expression value
sal_Int16 sval; // Contains short expression value
sal_uInt16 usval; // Contains unsigned short expr value
sal_Int32 lval; // Contains long expression value
sal_uInt32 ulval; // Contains unsigned long expr value
sal_Int64 hval; // Contains hyper expression value
sal_uInt64 uhval; // Contains unsigned hyper expr value
bool bval; // Contains boolean expression value
float fval; // Contains 32-bit float expr value
double dval; // Contains 64-bit float expr value
} u;
ExprType et;
};
const sal_Char* exprTypeToString(ExprType t);
class AstExpression final
{
public:
// Constructor(s)
AstExpression(ExprComb c, AstExpression *pExpr1, AstExpression *pExpr2);
AstExpression(sal_Int32 l);
AstExpression(sal_Int32 l, ExprType et);
AstExpression(sal_Int64 h);
AstExpression(sal_uInt64 uh);
AstExpression(double d);
AstExpression(OString* scopedName);
~AstExpression();
// Data Accessors
AstExprValue* getExprValue()
{ return m_exprValue.get(); }
// Evaluation and value coercion
bool coerce(ExprType type);
// Evaluate then store value inside this AstExpression
void evaluate();
// Compare LONG AstExpression values
bool compareLong(AstExpression *pExpr);
OString toString();
private:
// Evaluate different sets of operators
std::unique_ptr<AstExprValue> eval_bin_op();
std::unique_ptr<AstExprValue> eval_bit_op();
std::unique_ptr<AstExprValue> eval_un_op();
std::unique_ptr<AstExprValue> eval_symbol();
ExprComb m_combOperator;
std::unique_ptr<AstExpression>
m_subExpr1;
std::unique_ptr<AstExpression>
m_subExpr2;
std::unique_ptr<AstExprValue>
m_exprValue;
o3tl::optional<OString>
m_xSymbolicName;
};
#endif // INCLUDED_IDLC_INC_ASTEXPRESSION_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */