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scanAnchor is now nothrow.

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This commit is contained in:
Ferdinand Majerech 2014-07-26 13:31:31 +02:00
parent 60e0270ffa
commit 5133257201
1 changed files with 21 additions and 16 deletions
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31
source/dyaml/scanner.d
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@ -683,7 +683,9 @@ final class Scanner
//No simple keys after ALIAS/ANCHOR.
allowSimpleKey_ = false;
tokens_.push(scanAnchor(id));
const anchor = scanAnchor(id);
throwIfError();
tokens_.push(anchor);
}
///Aliases to add ALIAS or ANCHOR token.
@ -1073,32 +1075,35 @@ final class Scanner
/// and
/// [ *alias , "value" ]
/// Therefore we restrict aliases to ASCII alphanumeric characters.
Token scanAnchor(const TokenID id) @trusted pure
///
/// In case of an error, error_ is set. Use throwIfError() to handle this.
Token scanAnchor(const TokenID id) @trusted pure nothrow
{
const startMark = reader_.mark;
const dchar i = reader_.get();
reader_.sliceBuilder.begin();
{
scope(failure) { reader_.sliceBuilder.finish(); }
if(i == '*') { scanAlphaNumericToSlice!"an alias"(startMark); }
else { scanAlphaNumericToSlice!"an anchor"(startMark); }
throwIfError();
}
// On error, value is discarded as we return immediately
const value = reader_.sliceBuilder.finish();
if(error_) { return Token.init; }
enforce((" \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek()) ||
("?:,]}%@"d).canFind(reader_.peek())),
new Error("While scanning an " ~ (i == '*') ? "alias" : "anchor",
startMark, "expected alphanumeric, - or _, but found "~
reader_.peek().to!string, reader_.mark));
if(!" \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek()) &&
!"?:,]}%@"d.canFind(reader_.peek()))
{
enum anchorCtx = "While scanning an anchor";
enum aliasCtx = "While scanning an alias";
error(i == '*' ? aliasCtx : anchorCtx, startMark,
expected("alphanumeric, '-' or '_'", reader_.peek()), reader_.mark);
return Token.init;
}
if(id == TokenID.Alias)
{
return aliasToken(startMark, reader_.mark, value.utf32To8);
}
else if(id == TokenID.Anchor)
if(id == TokenID.Anchor)
{
return anchorToken(startMark, reader_.mark, value.utf32To8);
}