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Optimized fetchToken()

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This commit is contained in:
Ferdinand Majerech 2014-08-04 02:26:14 +02:00
parent 7360e85a3a
commit 44885cde4e
1 changed files with 28 additions and 28 deletions
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56
source/dyaml/scanner.d
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@ -284,30 +284,33 @@ final class Scanner
unwindIndent(reader_.column);
// Get the next character.
const dchar c = reader_.peek();
const dchar c = reader_.peekByte();
// Fetch the token.
if(c == '\0') { return fetchStreamEnd(); }
if(checkDirective()) { return fetchDirective(); }
if(checkDocumentStart()) { return fetchDocumentStart(); }
if(checkDocumentEnd()) { return fetchDocumentEnd(); }
if(c == '\0') { return fetchStreamEnd(); }
if(checkDirective()) { return fetchDirective(); }
if(checkDocumentStart()) { return fetchDocumentStart(); }
if(checkDocumentEnd()) { return fetchDocumentEnd(); }
// Order of the following checks is NOT significant.
if(c == '[') { return fetchFlowSequenceStart(); }
if(c == '{') { return fetchFlowMappingStart(); }
if(c == ']') { return fetchFlowSequenceEnd(); }
if(c == '}') { return fetchFlowMappingEnd(); }
if(c == ',') { return fetchFlowEntry(); }
if(checkBlockEntry()) { return fetchBlockEntry(); }
if(checkKey()) { return fetchKey(); }
if(checkValue()) { return fetchValue(); }
if(c == '*') { return fetchAlias(); }
if(c == '&') { return fetchAnchor(); }
if(c == '!') { return fetchTag(); }
if(c == '|' && flowLevel_ == 0) { return fetchLiteral(); }
if(c == '>' && flowLevel_ == 0) { return fetchFolded(); }
if(c == '\'') { return fetchSingle(); }
if(c == '\"') { return fetchDouble(); }
if(checkPlain()) { return fetchPlain(); }
switch(c)
{
case '[': return fetchFlowSequenceStart();
case '{': return fetchFlowMappingStart();
case ']': return fetchFlowSequenceEnd();
case '}': return fetchFlowMappingEnd();
case ',': return fetchFlowEntry();
case '!': return fetchTag();
case '\'': return fetchSingle();
case '\"': return fetchDouble();
case '*': return fetchAlias();
case '&': return fetchAnchor();
case '?': if(checkKey()) { return fetchKey(); } goto default;
case ':': if(checkValue()) { return fetchValue(); } goto default;
case '-': if(checkBlockEntry()) { return fetchBlockEntry(); } goto default;
case '|': if(flowLevel_ == 0) { return fetchLiteral(); } break;
case '>': if(flowLevel_ == 0) { return fetchFolded(); } break;
default: if(checkPlain()) { return fetchPlain(); }
}
throw new ScannerException("While scanning for the next token, found character "
"\'%s\', index %s that cannot start any token"
@ -757,8 +760,7 @@ final class Scanner
/// Check if the next token is BLOCK-ENTRY: '-' (' '|'\n')
bool checkBlockEntry() @safe pure nothrow @nogc
{
return reader_.peek() == '-' &&
" \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(1));
return " \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(1));
}
/// Check if the next token is KEY(flow context): '?'
@ -766,8 +768,7 @@ final class Scanner
/// or KEY(block context): '?' (' '|'\n')
bool checkKey() @safe pure nothrow @nogc
{
return reader_.peek() == '?' &&
(flowLevel_ > 0 ||
return (flowLevel_ > 0 ||
" \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(1)));
}
@ -776,9 +777,8 @@ final class Scanner
/// or VALUE(block context): ':' (' '|'\n')
bool checkValue() @safe pure nothrow @nogc
{
return reader_.peek() == ':' &&
(flowLevel_ > 0 ||
" \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(1)));
mixin FastCharSearch!" \t\0\n\r\u0085\u2028\u2029"d search;
return flowLevel_ > 0 || search.canFind(reader_.peek(1));
}
/// Check if the next token is a plain scalar.