mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
336 lines
15 KiB
C++
336 lines
15 KiB
C++
// Copyright 2006-2012, the V8 project authors. All rights reserved.
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following
|
|
// disclaimer in the documentation and/or other materials provided
|
|
// with the distribution.
|
|
// * Neither the name of Google Inc. nor the names of its
|
|
// contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
// Modifications as part of cpp-ethereum under the following license:
|
|
//
|
|
// cpp-ethereum is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// cpp-ethereum is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
#pragma once
|
|
|
|
#include <boost/assert.hpp>
|
|
|
|
#include <libdevcore/Common.h>
|
|
#include <libdevcore/Log.h>
|
|
|
|
namespace dev
|
|
{
|
|
namespace solidity
|
|
{
|
|
|
|
// TOKEN_LIST takes a list of 3 macros M, all of which satisfy the
|
|
// same signature M(name, string, precedence), where name is the
|
|
// symbolic token name, string is the corresponding syntactic symbol
|
|
// (or NULL, for literals), and precedence is the precedence (or 0).
|
|
// The parameters are invoked for token categories as follows:
|
|
//
|
|
// T: Non-keyword tokens
|
|
// K: Keyword tokens
|
|
|
|
// IGNORE_TOKEN is a convenience macro that can be supplied as
|
|
// an argument (at any position) for a TOKEN_LIST call. It does
|
|
// nothing with tokens belonging to the respective category.
|
|
|
|
#define IGNORE_TOKEN(name, string, precedence)
|
|
|
|
#define TOKEN_LIST(T, K) \
|
|
/* End of source indicator. */ \
|
|
T(EOS, "EOS", 0) \
|
|
\
|
|
/* Punctuators (ECMA-262, section 7.7, page 15). */ \
|
|
T(LPAREN, "(", 0) \
|
|
T(RPAREN, ")", 0) \
|
|
T(LBRACK, "[", 0) \
|
|
T(RBRACK, "]", 0) \
|
|
T(LBRACE, "{", 0) \
|
|
T(RBRACE, "}", 0) \
|
|
T(COLON, ":", 0) \
|
|
T(SEMICOLON, ";", 0) \
|
|
T(PERIOD, ".", 0) \
|
|
T(CONDITIONAL, "?", 3) \
|
|
T(INC, "++", 0) \
|
|
T(DEC, "--", 0) \
|
|
T(ARROW, "=>", 0) \
|
|
\
|
|
/* Assignment operators. */ \
|
|
/* IsAssignmentOp() relies on this block of enum values being */ \
|
|
/* contiguous and sorted in the same order!*/ \
|
|
T(ASSIGN, "=", 2) \
|
|
/* The following have to be in exactly the same order as the simple binary operators*/ \
|
|
T(ASSIGN_BIT_OR, "|=", 2) \
|
|
T(ASSIGN_BIT_XOR, "^=", 2) \
|
|
T(ASSIGN_BIT_AND, "&=", 2) \
|
|
T(ASSIGN_SHL, "<<=", 2) \
|
|
T(ASSIGN_SAR, ">>=", 2) \
|
|
T(ASSIGN_SHR, ">>>=", 2) \
|
|
T(ASSIGN_ADD, "+=", 2) \
|
|
T(ASSIGN_SUB, "-=", 2) \
|
|
T(ASSIGN_MUL, "*=", 2) \
|
|
T(ASSIGN_DIV, "/=", 2) \
|
|
T(ASSIGN_MOD, "%=", 2) \
|
|
\
|
|
/* Binary operators sorted by precedence. */ \
|
|
/* IsBinaryOp() relies on this block of enum values */ \
|
|
/* being contiguous and sorted in the same order! */ \
|
|
T(COMMA, ",", 1) \
|
|
T(OR, "||", 4) \
|
|
T(AND, "&&", 5) \
|
|
T(BIT_OR, "|", 6) \
|
|
T(BIT_XOR, "^", 7) \
|
|
T(BIT_AND, "&", 8) \
|
|
T(SHL, "<<", 11) \
|
|
T(SAR, ">>", 11) \
|
|
T(SHR, ">>>", 11) \
|
|
T(ADD, "+", 12) \
|
|
T(SUB, "-", 12) \
|
|
T(MUL, "*", 13) \
|
|
T(DIV, "/", 13) \
|
|
T(MOD, "%", 13) \
|
|
\
|
|
/* Compare operators sorted by precedence. */ \
|
|
/* IsCompareOp() relies on this block of enum values */ \
|
|
/* being contiguous and sorted in the same order! */ \
|
|
T(EQ, "==", 9) \
|
|
T(NE, "!=", 9) \
|
|
T(LT, "<", 10) \
|
|
T(GT, ">", 10) \
|
|
T(LTE, "<=", 10) \
|
|
T(GTE, ">=", 10) \
|
|
K(IN, "in", 10) \
|
|
\
|
|
/* Unary operators. */ \
|
|
/* IsUnaryOp() relies on this block of enum values */ \
|
|
/* being contiguous and sorted in the same order! */ \
|
|
T(NOT, "!", 0) \
|
|
T(BIT_NOT, "~", 0) \
|
|
K(DELETE, "delete", 0) \
|
|
\
|
|
/* Keywords */ \
|
|
K(BREAK, "break", 0) \
|
|
K(CASE, "case", 0) \
|
|
K(CONST, "const", 0) \
|
|
K(CONTINUE, "continue", 0) \
|
|
K(CONTRACT, "contract", 0) \
|
|
K(DEFAULT, "default", 0) \
|
|
K(DO, "do", 0) \
|
|
K(ELSE, "else", 0) \
|
|
K(EXTENDS, "extends", 0) \
|
|
K(FOR, "for", 0) \
|
|
K(FUNCTION, "function", 0) \
|
|
K(IF, "if", 0) \
|
|
K(IMPORT, "import", 0) \
|
|
K(MAPPING, "mapping", 0) \
|
|
K(NEW, "new", 0) \
|
|
K(PUBLIC, "public", 0) \
|
|
K(PRIVATE, "private", 0) \
|
|
K(RETURN, "return", 0) \
|
|
K(RETURNS, "returns", 0) \
|
|
K(STRUCT, "struct", 0) \
|
|
K(SWITCH, "switch", 0) \
|
|
K(THIS, "this", 0) \
|
|
K(VAR, "var", 0) \
|
|
K(WHILE, "while", 0) \
|
|
\
|
|
\
|
|
/* type keywords, keep them in this order, keep int as first keyword
|
|
* the implementation in Types.cpp has to be synced to this here
|
|
* TODO more to be added */ \
|
|
K(INT, "int", 0) \
|
|
K(INT32, "int32", 0) \
|
|
K(INT64, "int64", 0) \
|
|
K(INT128, "int128", 0) \
|
|
K(INT256, "int256", 0) \
|
|
K(UINT, "uint", 0) \
|
|
K(UINT32, "uint32", 0) \
|
|
K(UINT64, "uint64", 0) \
|
|
K(UINT128, "uint128", 0) \
|
|
K(UINT256, "uint256", 0) \
|
|
K(HASH, "hash", 0) \
|
|
K(HASH32, "hash32", 0) \
|
|
K(HASH64, "hash64", 0) \
|
|
K(HASH128, "hash128", 0) \
|
|
K(HASH256, "hash256", 0) \
|
|
K(ADDRESS, "address", 0) \
|
|
K(BOOL, "bool", 0) \
|
|
K(STRING_TYPE, "string", 0) \
|
|
K(TEXT, "text", 0) \
|
|
K(REAL, "real", 0) \
|
|
K(UREAL, "ureal", 0) \
|
|
T(TYPES_END, NULL, 0) /* used as type enum end marker */ \
|
|
\
|
|
/* Literals */ \
|
|
K(NULL_LITERAL, "null", 0) \
|
|
K(TRUE_LITERAL, "true", 0) \
|
|
K(FALSE_LITERAL, "false", 0) \
|
|
T(NUMBER, NULL, 0) \
|
|
T(STRING_LITERAL, NULL, 0) \
|
|
\
|
|
/* Identifiers (not keywords or future reserved words). */ \
|
|
T(IDENTIFIER, NULL, 0) \
|
|
\
|
|
/* Illegal token - not able to scan. */ \
|
|
T(ILLEGAL, "ILLEGAL", 0) \
|
|
\
|
|
/* Scanner-internal use only. */ \
|
|
T(WHITESPACE, NULL, 0)
|
|
|
|
|
|
class Token
|
|
{
|
|
public:
|
|
// All token values.
|
|
#define T(name, string, precedence) name,
|
|
enum Value
|
|
{
|
|
TOKEN_LIST(T, T)
|
|
NUM_TOKENS
|
|
};
|
|
#undef T
|
|
|
|
// Returns a string corresponding to the C++ token name
|
|
// (e.g. "LT" for the token LT).
|
|
static char const* getName(Value tok)
|
|
{
|
|
BOOST_ASSERT(tok < NUM_TOKENS); // tok is unsigned
|
|
return m_name[tok];
|
|
}
|
|
|
|
// Predicates
|
|
static bool isKeyword(Value tok) { return m_tokenType[tok] == 'K'; }
|
|
static bool isIdentifier(Value tok) { return tok == IDENTIFIER; }
|
|
static bool isElementaryTypeName(Value tok) { return INT <= tok && tok < TYPES_END; }
|
|
static bool isAssignmentOp(Value tok) { return ASSIGN <= tok && tok <= ASSIGN_MOD; }
|
|
static bool isBinaryOp(Value op) { return COMMA <= op && op <= MOD; }
|
|
static bool isTruncatingBinaryOp(Value op) { return BIT_OR <= op && op <= SHR; }
|
|
static bool isArithmeticOp(Value op) { return ADD <= op && op <= MOD; }
|
|
static bool isCompareOp(Value op) { return EQ <= op && op <= IN; }
|
|
static bool isOrderedRelationalCompareOp(Value op)
|
|
{
|
|
return op == LT || op == LTE || op == GT || op == GTE;
|
|
}
|
|
static bool isEqualityOp(Value op) { return op == EQ; }
|
|
static bool isInequalityOp(Value op) { return op == NE; }
|
|
static bool isArithmeticCompareOp(Value op)
|
|
{
|
|
return isOrderedRelationalCompareOp(op) ||
|
|
isEqualityOp(op) || isInequalityOp(op);
|
|
}
|
|
|
|
static Value negateCompareOp(Value op)
|
|
{
|
|
BOOST_ASSERT(isArithmeticCompareOp(op));
|
|
switch (op)
|
|
{
|
|
case EQ:
|
|
return NE;
|
|
case NE:
|
|
return EQ;
|
|
case LT:
|
|
return GTE;
|
|
case GT:
|
|
return LTE;
|
|
case LTE:
|
|
return GT;
|
|
case GTE:
|
|
return LT;
|
|
default:
|
|
BOOST_ASSERT(false); // should not get here
|
|
return op;
|
|
}
|
|
}
|
|
|
|
static Value reverseCompareOp(Value op)
|
|
{
|
|
BOOST_ASSERT(isArithmeticCompareOp(op));
|
|
switch (op)
|
|
{
|
|
case EQ:
|
|
return EQ;
|
|
case NE:
|
|
return NE;
|
|
case LT:
|
|
return GT;
|
|
case GT:
|
|
return LT;
|
|
case LTE:
|
|
return GTE;
|
|
case GTE:
|
|
return LTE;
|
|
default:
|
|
BOOST_ASSERT(false); // should not get here
|
|
return op;
|
|
}
|
|
}
|
|
|
|
static Value AssignmentToBinaryOp(Value op)
|
|
{
|
|
BOOST_ASSERT(isAssignmentOp(op) && op != ASSIGN);
|
|
return Token::Value(op + (BIT_OR - ASSIGN_BIT_OR));
|
|
}
|
|
|
|
static bool isBitOp(Value op) { return (BIT_OR <= op && op <= SHR) || op == BIT_NOT; }
|
|
static bool isUnaryOp(Value op) { return (NOT <= op && op <= DELETE) || op == ADD || op == SUB; }
|
|
static bool isCountOp(Value op) { return op == INC || op == DEC; }
|
|
static bool isShiftOp(Value op) { return (SHL <= op) && (op <= SHR); }
|
|
|
|
// Returns a string corresponding to the JS token string
|
|
// (.e., "<" for the token LT) or NULL if the token doesn't
|
|
// have a (unique) string (e.g. an IDENTIFIER).
|
|
static char const* toString(Value tok)
|
|
{
|
|
BOOST_ASSERT(tok < NUM_TOKENS); // tok is unsigned.
|
|
return m_string[tok];
|
|
}
|
|
|
|
// Returns the precedence > 0 for binary and compare
|
|
// operators; returns 0 otherwise.
|
|
static int precedence(Value tok)
|
|
{
|
|
BOOST_ASSERT(tok < NUM_TOKENS); // tok is unsigned.
|
|
return m_precedence[tok];
|
|
}
|
|
|
|
private:
|
|
static char const* const m_name[NUM_TOKENS];
|
|
static char const* const m_string[NUM_TOKENS];
|
|
static int8_t const m_precedence[NUM_TOKENS];
|
|
static char const m_tokenType[NUM_TOKENS];
|
|
};
|
|
|
|
}
|
|
}
|