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d: change YYLocation's type from class to struct

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This avoids heap allocation and gives minimal costs for the
creation and destruction of the YYParser.Symbol struct if
the location tracking is active.

Suggested by H. S. Teoh.

* data/skeletons/lalr1.d: Here.
* doc/bison.texi: Document it.
* examples/d/calc/calc.y: Adjust.
* tests/calc.at: Test it.
This commit is contained in:
Adela Vais
2020-11-19 23:03:56 +02:00
committed by Akim Demaille
parent 10305f3e94
commit e5854bbddd
4 changed files with 34 additions and 38 deletions
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30
tests/calc.at
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@@ -560,7 +560,7 @@ class CalcLexer(R) : Lexer
]AT_YYERROR_DEFINE[
YYSemanticType semanticVal_;]AT_LOCATION_IF([[
YYLocation location = new YYLocation;
YYLocation location;
public final @property YYPosition startPos()
{
@@ -606,13 +606,13 @@ class CalcLexer(R) : Lexer
// EOF.
if (input.empty)
return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[EOF]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[EOF]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
// Numbers.
if (input.front.isNumber)
{
semanticVal_.ival = parseInt;
return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[NUM, semanticVal_.ival]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[NUM, semanticVal_.ival]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
}
// Individual characters
@@ -630,22 +630,22 @@ class CalcLexer(R) : Lexer
if (c == '#')
{
stderr.writeln (]AT_LOCATION_IF([location, ": ", ])["syntax error: invalid character: '#'");
return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[YYerror]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[YYerror]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
}
switch (c)
{
case '+': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[PLUS]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case '-': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[MINUS]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case '*': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[STAR]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case '/': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[SLASH]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case '(': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[LPAR]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case ')': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[RPAR]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case '\n': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[EOL]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case '=': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[EQUAL]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case '^': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[POW]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case '!': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[NOT]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
default: return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[YYUNDEF]AT_LOCATION_IF([[, new YYLocation(startPos, endPos)]])[);
case '+': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[PLUS]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
case '-': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[MINUS]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
case '*': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[STAR]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
case '/': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[SLASH]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
case '(': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[LPAR]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
case ')': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[RPAR]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
case '\n': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[EOL]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
case '=': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[EQUAL]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
case '^': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[POW]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
case '!': return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[NOT]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
default: return YYParser.Symbol(TokenKind.]AT_TOKEN_PREFIX[YYUNDEF]AT_LOCATION_IF([[, YYLocation(startPos, endPos)]])[);
}
}
}