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Version pragma.

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This commit is contained in:
chriseth
2016-09-01 00:02:51 +02:00
parent 52d9f89712
commit 3c412ed2f6
27 changed files with 902 additions and 66 deletions
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libsolidity/parsing/Parser.cpp
+33
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@@ -76,6 +76,9 @@ ASTPointer<SourceUnit> Parser::parse(shared_ptr<Scanner> const& _scanner)
{
switch (auto token = m_scanner->currentToken())
{
case Token::Pragma:
nodes.push_back(parsePragmaDirective());
break;
case Token::Import:
nodes.push_back(parseImportDirective());
break;
@@ -97,6 +100,36 @@ ASTPointer<SourceUnit> Parser::parse(shared_ptr<Scanner> const& _scanner)
}
}
ASTPointer<PragmaDirective> Parser::parsePragmaDirective()
{
// pragma anything* ;
// Currently supported:
// pragma solidity ^0.4.0 || ^0.3.0;
ASTNodeFactory nodeFactory(*this);
expectToken(Token::Pragma);
vector<string> literals;
vector<Token::Value> tokens;
do
{
Token::Value token = m_scanner->currentToken();
if (token == Token::Illegal)
parserError("Token incompatible with Solidity parser as part of pragma directive.");
else
{
string literal = m_scanner->currentLiteral();
if (literal.empty() && Token::toString(token))
literal = Token::toString(token);
literals.push_back(literal);
tokens.push_back(token);
}
m_scanner->next();
}
while (m_scanner->currentToken() != Token::Semicolon && m_scanner->currentToken() != Token::EOS);
nodeFactory.markEndPosition();
expectToken(Token::Semicolon);
return nodeFactory.createNode<PragmaDirective>(tokens, literals);
}
ASTPointer<ImportDirective> Parser::parseImportDirective()
{
// import "abc" [as x];