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Add switch/case/default statements, using a switch node that contains a sequence of case/default nodes and top-level nodes of the code chunks in between them.

Browse source 
git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@21131 e7fa87d3-cd2b-0410-9028-fcbf551c1848
This commit is contained in:
John Kessenich 2013-04-12 03:57:02 +00:00
parent 8e5425745f
commit 0576126005
10 changed files with 244 additions and 23 deletions
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54
glslang/MachineIndependent/ParseHelper.cpp
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@ -44,7 +44,7 @@ TParseContext::TParseContext(TSymbolTable& symt, TIntermediate& interm, int v, E
bool fc, EShMessages m) :
intermediate(interm), symbolTable(symt), infoSink(is), language(L), treeRoot(0),
recoveredFromError(false), numErrors(0), lexAfterType(false), loopNestingLevel(0),
switchNestingLevel(0), inTypeParen(false),
inTypeParen(false),
version(v), profile(p), forwardCompatible(fc), messages(m),
contextPragma(true, false)
{
@ -1574,6 +1574,58 @@ void TParseContext::addBlock(int line, TPublicType& publicType, const TString& b
}
}
void TParseContext::wrapupSwitchSubsequence(TIntermAggregate* statements, TIntermNode* branchNode)
{
auto switchSequence = switchSequenceStack.back();
if (statements) {
if (switchSequence->size() == 0) {
error(statements->getLine(), "cannot have statements before first case/default label", "switch", "");
recover();
}
statements->setOperator(EOpSequence);
switchSequence->push_back(statements);
}
if (branchNode)
switchSequence->push_back(branchNode);
}
TIntermNode* TParseContext::addSwitch(int line, TIntermTyped* expression, TIntermAggregate* lastStatements)
{
profileRequires(line, EEsProfile, 300, 0, "switch statements");
profileRequires(line, ENoProfile, 130, 0, "switch statements");
wrapupSwitchSubsequence(lastStatements, 0);
if (expression == 0 ||
expression->getBasicType() != EbtInt && expression->getBasicType() != EbtUint ||
expression->getType().isArray() || expression->getType().isMatrix() || expression->getType().isVector()) {
error(line, "condition must be a scalar integer expression", "switch", "");
recover();
}
// If there is nothing to do, drop the switch but still execute the expression
auto switchSequence = switchSequenceStack.back();
if (switchSequence->size() == 0)
return expression;
if (lastStatements == 0) {
error(line, "last case/default label must be followed by statements", "switch", "");
recover();
return expression;
}
TIntermAggregate* body = new TIntermAggregate(EOpSequence);
body->getSequence() = *switchSequenceStack.back();
body->setLine(line);
TIntermSwitch* switchNode = new TIntermSwitch(expression, body);
switchNode->setLine(line);
return switchNode;
}
void TParseContext::updateDefaults(int line, const TPublicType& publicType, const TString* id)
{
bool cantHaveId = false;