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Merge pull request #6960 from ethereum/fixAsmParser

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Asm Parser: Properly consider tokens when checking for clashes with builtins.
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chriseth 2019-06-19 10:57:46 +02:00 committed by GitHub
commit 5675b742ec
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1 changed files with 18 additions and 26 deletions
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30
libyul/AsmParser.cpp
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@ -384,17 +384,10 @@ Parser::ElementaryOperation Parser::parseElementaryOperation()
case Token::Identifier:
case Token::Return:
case Token::Byte:
case Token::Bool:
case Token::Address:
{
YulString literal;
if (currentToken() == Token::Return)
literal = "return"_yulstring;
else if (currentToken() == Token::Byte)
literal = "byte"_yulstring;
else if (currentToken() == Token::Address)
literal = "address"_yulstring;
else
literal = YulString{currentLiteral()};
YulString literal{currentLiteral()};
// first search the set of builtins, then the instructions.
if (m_dialect.builtin(literal))
{
@ -648,26 +641,25 @@ TypedName Parser::parseTypedName()
YulString Parser::expectAsmIdentifier()
{
YulString name = YulString{currentLiteral()};
if (m_dialect.flavour == AsmFlavour::Yul)
{
YulString name{currentLiteral()};
switch (currentToken())
{
case Token::Return:
case Token::Byte:
case Token::Address:
case Token::Bool:
advance();
return name;
case Token::Identifier:
break;
default:
expectToken(Token::Identifier);
break;
}
}
else if (m_dialect.builtin(name))
if (m_dialect.builtin(name))
fatalParserError("Cannot use builtin function name \"" + name.str() + "\" as identifier name.");
else if (instructions().count(name.str()))
fatalParserError("Cannot use instruction names for identifier names.");
expectToken(Token::Identifier);
else if (m_dialect.flavour == AsmFlavour::Loose && instructions().count(name.str()))
fatalParserError("Cannot use instruction name \"" + name.str() + "\" as identifier name.");
advance();
return name;
}