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HLSL: Fix #919: for-init-statement is arbitrary declaration or expression.

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Unlike "if (XXX)" and "while (XXX)", with "for (YYY...", the YYY can be
more kinds of statements than the XXX.
This commit is contained in:
John Kessenich 2017-06-06 11:37:33 -06:00
parent e00e8f45a6
commit 0e07119ae2
5 changed files with 322 additions and 62 deletions
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68
hlsl/hlslGrammar.cpp
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@ -3039,6 +3039,37 @@ bool HlslGrammar::acceptLiteral(TIntermTyped*& node)
return true;
}
// simple_statement
// : SEMICOLON
// | declaration_statement
// | expression SEMICOLON
//
bool HlslGrammar::acceptSimpleStatement(TIntermNode*& statement)
{
// SEMICOLON
if (acceptTokenClass(EHTokSemicolon))
return true;
// declaration
if (acceptDeclaration(statement))
return true;
// expression
TIntermTyped* node;
if (acceptExpression(node))
statement = node;
else
return false;
// SEMICOLON (following an expression)
if (acceptTokenClass(EHTokSemicolon))
return true;
else {
expected(";");
return false;
}
}
// compound_statement
// : LEFT_CURLY statement statement ... RIGHT_CURLY
//
@ -3096,12 +3127,11 @@ bool HlslGrammar::acceptScopedCompoundStatement(TIntermNode*& statement)
//
// attributed_statement
// : compound_statement
// | SEMICOLON
// | expression SEMICOLON
// | declaration_statement
// | simple_statement
// | selection_statement
// | switch_statement
// | case_label
// | default_label
// | iteration_statement
// | jump_statement
//
@ -3140,33 +3170,13 @@ bool HlslGrammar::acceptStatement(TIntermNode*& statement)
case EHTokDefault:
return acceptDefaultLabel(statement);
case EHTokSemicolon:
return acceptTokenClass(EHTokSemicolon);
case EHTokRightBrace:
// Performance: not strictly necessary, but stops a bunch of hunting early,
// and is how sequences of statements end.
return false;
default:
{
// declaration
if (acceptDeclaration(statement))
return true;
// expression
TIntermTyped* node;
if (acceptExpression(node))
statement = node;
else
return false;
// SEMICOLON (following an expression)
if (! acceptTokenClass(EHTokSemicolon)) {
expected(";");
return false;
}
}
return acceptSimpleStatement(statement);
}
return true;
@ -3420,14 +3430,8 @@ bool HlslGrammar::acceptIterationStatement(TIntermNode*& statement, const TAttri
// initializer
TIntermNode* initNode = nullptr;
if (! acceptControlDeclaration(initNode)) {
TIntermTyped* initExpr = nullptr;
acceptExpression(initExpr);
initNode = initExpr;
}
// SEMI_COLON
if (! acceptTokenClass(EHTokSemicolon))
expected(";");
if (! acceptSimpleStatement(initNode))
expected("for-loop initializer statement");
parseContext.nestLooping();