// PlainScalar
void Scanner::ScanPlainScalar()
{
std::string scalar;
// set up the scanning parameters
ScanScalarParams params;
params.end = (InFlowContext() ? Exp::EndScalarInFlow() : Exp::EndScalar()) || (Exp::BlankOrBreak() + Exp::Comment());
params.eatEnd = false;
params.indent = (InFlowContext() ? 0 : GetTopIndent() + 1);
params.fold = FOLD_FLOW;
params.eatLeadingWhitespace = true;
params.trimTrailingSpaces = true;
params.chomp = STRIP;
params.onDocIndicator = BREAK;
params.onTabInIndentation = THROW;
// insert a potential simple key
InsertPotentialSimpleKey();
Mark mark = INPUT.mark();
scalar = ScanScalar(INPUT, params);
// can have a simple key only if we ended the scalar by starting a new line
m_simpleKeyAllowed = params.leadingSpaces;
m_canBeJSONFlow = false;
// finally, check and see if we ended on an illegal character
//if(Exp::IllegalCharInScalar.Matches(INPUT))
// throw ParserException(INPUT.mark(), ErrorMsg::CHAR_IN_SCALAR);
Token token(Token::PLAIN_SCALAR, mark);
token.value = scalar;
m_tokens.push(token);
}
// AnchorOrAlias
void Scanner::ScanAnchorOrAlias()
{
bool alias;
std::string name;
// insert a potential simple key
InsertPotentialSimpleKey();
m_simpleKeyAllowed = false;
m_canBeJSONFlow = false;
// eat the indicator
Mark mark = INPUT.mark();
char indicator = INPUT.get();
alias = (indicator == Keys::Alias);
// now eat the content
while(INPUT && Exp::Anchor().Matches(INPUT))
name += INPUT.get();
// we need to have read SOMETHING!
if(name.empty())
throw ParserException(INPUT.mark(), alias ? ErrorMsg::ALIAS_NOT_FOUND : ErrorMsg::ANCHOR_NOT_FOUND);
// and needs to end correctly
if(INPUT && !Exp::AnchorEnd().Matches(INPUT))
throw ParserException(INPUT.mark(), alias ? ErrorMsg::CHAR_IN_ALIAS : ErrorMsg::CHAR_IN_ANCHOR);
// and we're done
Token token(alias ? Token::ALIAS : Token::ANCHOR, mark);
token.value = name;
m_tokens.push(token);
}
// FlowStart
void Scanner::ScanFlowStart()
{
// flows can be simple keys
InsertPotentialSimpleKey();
m_simpleKeyAllowed = true;
m_canBeJSONFlow = false;
// eat
Mark mark = INPUT.mark();
char ch = INPUT.get();
FLOW_MARKER flowType = (ch == Keys::FlowSeqStart ? FLOW_SEQ : FLOW_MAP);
m_flows.push(flowType);
Token::TYPE type = (flowType == FLOW_SEQ ? Token::FLOW_SEQ_START : Token::FLOW_MAP_START);
m_tokens.push(Token(type, mark));
}
// Tag
void Scanner::ScanTag()
{
// insert a potential simple key
InsertPotentialSimpleKey();
m_simpleKeyAllowed = false;
m_canBeJSONFlow = false;
Token token(Token::TAG, INPUT.mark());
// eat the indicator
INPUT.get();
if(INPUT && INPUT.peek() == Keys::VerbatimTagStart){
std::string tag = ScanVerbatimTag(INPUT);
token.value = tag;
token.data = Tag::VERBATIM;
} else {
bool canBeHandle;
token.value = ScanTagHandle(INPUT, canBeHandle);
if(!canBeHandle && token.value.empty())
token.data = Tag::NON_SPECIFIC;
else if(token.value.empty())
token.data = Tag::SECONDARY_HANDLE;
else
token.data = Tag::PRIMARY_HANDLE;
// is there a suffix?
if(canBeHandle && INPUT.peek() == Keys::Tag) {
// eat the indicator
INPUT.get();
token.params.push_back(ScanTagSuffix(INPUT));
token.data = Tag::NAMED_HANDLE;
}
}
m_tokens.push(token);
}
// QuotedScalar
void Scanner::ScanQuotedScalar() {
std::string scalar;
// peek at single or double quote (don't eat because we need to preserve (for
// the time being) the input position)
char quote = INPUT.peek();
bool single = (quote == '\'');
// setup the scanning parameters
ScanScalarParams params;
RegEx end = (single ? RegEx(quote) && !Exp::EscSingleQuote() : RegEx(quote));
params.end = &end;
params.eatEnd = true;
params.escape = (single ? '\'' : '\\');
params.indent = 0;
params.fold = FOLD_FLOW;
params.eatLeadingWhitespace = true;
params.trimTrailingSpaces = false;
params.chomp = CLIP;
params.onDocIndicator = THROW;
// insert a potential simple key
InsertPotentialSimpleKey();
Mark mark = INPUT.mark();
// now eat that opening quote
INPUT.get();
// and scan
scalar = ScanScalar(INPUT, params);
m_simpleKeyAllowed = false;
m_canBeJSONFlow = true;
Token token(Token::NON_PLAIN_SCALAR, mark);
token.value = scalar;
m_tokens.push(token);
}
