mirror of
https://github.com/fish-shell/fish-shell.git
synced 2024-12-01 06:53:39 +08:00
344 lines
11 KiB
C++
344 lines
11 KiB
C++
/*
|
|
__________
|
|
_____ __ __\______ \_____ _______ ______ ____ _______
|
|
/ \ | | \| ___/\__ \ \_ __ \/ ___/_/ __ \\_ __ \
|
|
| Y Y \| | /| | / __ \_| | \/\___ \ \ ___/ | | \/
|
|
|__|_| /|____/ |____| (____ /|__| /____ > \___ >|__|
|
|
\/ \/ \/ \/
|
|
Copyright (C) 2004-2013 Ingo Berg
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy of this
|
|
software and associated documentation files (the "Software"), to deal in the Software
|
|
without restriction, including without limitation the rights to use, copy, modify,
|
|
merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in all copies or
|
|
substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
|
|
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
|
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef MU_PARSER_TOKEN_H
|
|
#define MU_PARSER_TOKEN_H
|
|
|
|
#include <cassert>
|
|
#include <memory>
|
|
#include <stack>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "muParserCallback.h"
|
|
|
|
/** \file
|
|
\brief This file contains the parser token definition.
|
|
*/
|
|
|
|
namespace mu {
|
|
/** \brief Encapsulation of the data for a single formula token.
|
|
|
|
Formula token implementation. Part of the Math Parser Package.
|
|
Formula tokens can be either one of the following:
|
|
<ul>
|
|
<li>value</li>
|
|
<li>variable</li>
|
|
<li>function with numerical arguments</li>
|
|
<li>functions with a string as argument</li>
|
|
<li>prefix operators</li>
|
|
<li>infix operators</li>
|
|
<li>binary operator</li>
|
|
</ul>
|
|
|
|
\author (C) 2004-2013 Ingo Berg
|
|
*/
|
|
template <typename TBase, typename TString>
|
|
class ParserToken {
|
|
private:
|
|
ECmdCode m_iCode; ///< Type of the token; The token type is a constant of type #ECmdCode.
|
|
ETypeCode m_iType;
|
|
void *m_pTok; ///< Stores Token pointer; not applicable for all tokens
|
|
int m_iIdx; ///< An otional index to an external buffer storing the token data
|
|
TString m_strTok; ///< Token string
|
|
TString m_strVal; ///< Value for string variables
|
|
value_type m_fVal; ///< the value
|
|
std::unique_ptr<ParserCallback> m_pCallback;
|
|
|
|
public:
|
|
//---------------------------------------------------------------------------
|
|
/** \brief Constructor (default).
|
|
|
|
Sets token to an neutral state of type cmUNKNOWN.
|
|
\sa ECmdCode
|
|
*/
|
|
ParserToken()
|
|
: m_iCode(cmUNKNOWN),
|
|
m_iType(tpVOID),
|
|
m_pTok(0),
|
|
m_iIdx(-1),
|
|
m_strTok(),
|
|
m_strVal(),
|
|
m_fVal(0),
|
|
m_pCallback() {}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Create token from another one.
|
|
|
|
Implemented by calling Assign(...)
|
|
\post m_iType==cmUNKNOWN
|
|
\sa #Assign
|
|
*/
|
|
ParserToken(const ParserToken &a_Tok) { Assign(a_Tok); }
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Assignement operator.
|
|
|
|
Copy token state from another token and return this.
|
|
Implemented by calling Assign(...).
|
|
*/
|
|
ParserToken &operator=(const ParserToken &a_Tok) {
|
|
Assign(a_Tok);
|
|
return *this;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Copy token information from argument.
|
|
*/
|
|
void Assign(const ParserToken &a_Tok) {
|
|
m_iCode = a_Tok.m_iCode;
|
|
m_pTok = a_Tok.m_pTok;
|
|
m_strTok = a_Tok.m_strTok;
|
|
m_iIdx = a_Tok.m_iIdx;
|
|
m_strVal = a_Tok.m_strVal;
|
|
m_iType = a_Tok.m_iType;
|
|
m_fVal = a_Tok.m_fVal;
|
|
// create new callback object if a_Tok has one
|
|
m_pCallback.reset(a_Tok.m_pCallback ? new ParserCallback(*a_Tok.m_pCallback) : nullptr);
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Assign a token type.
|
|
|
|
Token may not be of type value, variable or function. Those have seperate set functions.
|
|
|
|
\pre [assert] a_iType!=cmVAR
|
|
\pre [assert] a_iType!=cmVAL
|
|
\pre [assert] a_iType!=cmFUNC
|
|
\post m_fVal = 0
|
|
\post m_pTok = 0
|
|
*/
|
|
ParserToken &Set(ECmdCode a_iType, const TString &a_strTok = TString()) {
|
|
// The following types cant be set this way, they have special Set functions
|
|
assert(a_iType != cmVAR);
|
|
assert(a_iType != cmVAL);
|
|
assert(a_iType != cmFUNC);
|
|
|
|
m_iCode = a_iType;
|
|
m_iType = tpVOID;
|
|
m_pTok = 0;
|
|
m_strTok = a_strTok;
|
|
m_iIdx = -1;
|
|
|
|
return *this;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Set Callback type. */
|
|
ParserToken &Set(const ParserCallback &a_pCallback, const TString &a_sTok) {
|
|
assert(a_pCallback.GetAddr());
|
|
|
|
m_iCode = a_pCallback.GetCode();
|
|
m_iType = tpVOID;
|
|
m_strTok = a_sTok;
|
|
m_pCallback.reset(new ParserCallback(a_pCallback));
|
|
|
|
m_pTok = 0;
|
|
m_iIdx = -1;
|
|
|
|
return *this;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Make this token a value token.
|
|
|
|
Member variables not necessary for value tokens will be invalidated.
|
|
*/
|
|
ParserToken &SetVal(TBase a_fVal, const TString &a_strTok = TString()) {
|
|
m_iCode = cmVAL;
|
|
m_iType = tpDBL;
|
|
m_fVal = a_fVal;
|
|
m_strTok = a_strTok;
|
|
m_iIdx = -1;
|
|
|
|
m_pTok = 0;
|
|
m_pCallback.reset(0);
|
|
|
|
return *this;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief make this token a variable token.
|
|
|
|
Member variables not necessary for variable tokens will be invalidated.
|
|
*/
|
|
ParserToken &SetVar(TBase *a_pVar, const TString &a_strTok) {
|
|
m_iCode = cmVAR;
|
|
m_iType = tpDBL;
|
|
m_strTok = a_strTok;
|
|
m_iIdx = -1;
|
|
m_pTok = (void *)a_pVar;
|
|
m_pCallback.reset(0);
|
|
return *this;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Make this token a variable token.
|
|
|
|
Member variables not necessary for variable tokens will be invalidated.
|
|
*/
|
|
ParserToken &SetString(const TString &a_strTok, std::size_t a_iSize) {
|
|
m_iCode = cmSTRING;
|
|
m_iType = tpSTR;
|
|
m_strTok = a_strTok;
|
|
m_iIdx = static_cast<int>(a_iSize);
|
|
|
|
m_pTok = 0;
|
|
m_pCallback.reset(0);
|
|
return *this;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Set an index associated with the token related data.
|
|
|
|
In cmSTRFUNC - This is the index to a string table in the main parser.
|
|
\param a_iIdx The index the string function result will take in the bytecode parser.
|
|
\throw exception_type if #a_iIdx<0 or #m_iType!=cmSTRING
|
|
*/
|
|
void SetIdx(int a_iIdx) {
|
|
if (m_iCode != cmSTRING || a_iIdx < 0) assert(0 && "muParser internal error");
|
|
|
|
m_iIdx = a_iIdx;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Return Index associated with the token related data.
|
|
|
|
In cmSTRFUNC - This is the index to a string table in the main parser.
|
|
|
|
\throw exception_type if #m_iIdx<0 or #m_iType!=cmSTRING
|
|
\return The index the result will take in the Bytecode calculatin array (#m_iIdx).
|
|
*/
|
|
int GetIdx() const {
|
|
if (m_iIdx < 0 || m_iCode != cmSTRING) assert(0 && "muParser internal error");
|
|
|
|
return m_iIdx;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Return the token type.
|
|
|
|
\return #m_iType
|
|
*/
|
|
ECmdCode GetCode() const {
|
|
if (m_pCallback.get()) {
|
|
return m_pCallback->GetCode();
|
|
} else {
|
|
return m_iCode;
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
ETypeCode GetType() const {
|
|
if (m_pCallback.get()) {
|
|
return m_pCallback->GetType();
|
|
} else {
|
|
return m_iType;
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
int GetPri() const {
|
|
if (!m_pCallback.get()) assert(0 && "muParser internal error");
|
|
|
|
if (m_pCallback->GetCode() != cmOPRT_BIN && m_pCallback->GetCode() != cmOPRT_INFIX)
|
|
assert(0 && "muParser internal error");
|
|
|
|
return m_pCallback->GetPri();
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
EOprtAssociativity GetAssociativity() const {
|
|
if (m_pCallback.get() == NULL || m_pCallback->GetCode() != cmOPRT_BIN)
|
|
assert(0 && "muParser internal error");
|
|
|
|
return m_pCallback->GetAssociativity();
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Return the address of the callback function assoziated with
|
|
function and operator tokens.
|
|
|
|
\return The pointer stored in #m_pTok.
|
|
*/
|
|
generic_fun_type GetFuncAddr() const {
|
|
return m_pCallback ? (generic_fun_type)m_pCallback->GetAddr() : nullptr;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brifef Get value of the token.
|
|
|
|
Only applicable to variable and value tokens.
|
|
*/
|
|
ValueOrError GetVal() const {
|
|
switch (m_iCode) {
|
|
case cmVAL:
|
|
return m_fVal;
|
|
case cmVAR:
|
|
return *((TBase *)m_pTok);
|
|
default:
|
|
return ParserError(ecVAL_EXPECTED);
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Get address of a variable token.
|
|
|
|
Valid only if m_iType==CmdVar.
|
|
\throw exception_type if token is no variable token.
|
|
*/
|
|
TBase *GetVar() const {
|
|
if (m_iCode != cmVAR) assert(0 && "muParser internal error");
|
|
|
|
return (TBase *)m_pTok;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Return the number of function arguments.
|
|
|
|
Valid only if m_iType==CmdFUNC.
|
|
*/
|
|
int GetArgCount() const {
|
|
assert(m_pCallback.get());
|
|
|
|
if (!m_pCallback->GetAddr()) assert(0 && "muParser internal error");
|
|
|
|
return m_pCallback->GetArgc();
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
/** \brief Return the token identifier.
|
|
|
|
If #m_iType is cmSTRING the token identifier is the value of the string argument
|
|
for a string function.
|
|
\return #m_strTok
|
|
\sa m_strTok
|
|
*/
|
|
const TString &GetAsString() const { return m_strTok; }
|
|
};
|
|
} // namespace mu
|
|
|
|
#endif
|