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Better error reporting for the 'case' construct.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51738 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mikhail Glushenkov 2008-05-30 06:15:47 +00:00
parent 37f509a70c
commit cb64f4be3a
1 changed files with 17 additions and 4 deletions
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21
utils/TableGen/LLVMCConfigurationEmitter.cpp
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@ -724,15 +724,23 @@ void EmitCaseTest(const DagInit& d, const char* IndentLevel,
// void F(Init* Statement, const char* IndentLevel, std::ostream& O).
template <typename F>
void EmitCaseConstructHandler(const DagInit* d, const char* IndentLevel,
const F& Callback,
const F& Callback, bool DefaultRequired,
const GlobalOptionDescriptions& OptDescs,
std::ostream& O) {
assert(d->getOperator()->getAsString() == "case");
for (unsigned i = 0, numArgs = d->getNumArgs(); i != numArgs; ++i) {
bool DefaultProvided = false;
unsigned numArgs = d->getNumArgs();
if (d->getNumArgs() < 2)
throw "There should be at least one clause in the 'case' expression:\n"
+ d->getAsString();
for (unsigned i = 0; i != numArgs; ++i) {
const DagInit& Test = InitPtrToDagInitRef(d->getArg(i));
// Emit the test.
if (Test.getOperator()->getAsString() == "default") {
DefaultProvided = true;
if (i+2 != numArgs)
throw std::string("The 'default' clause should be the last in the"
"'case' construct!");
@ -744,6 +752,7 @@ void EmitCaseConstructHandler(const DagInit* d, const char* IndentLevel,
O << ") {\n";
}
// Emit the corresponding statement.
++i;
if (i == numArgs)
throw "Case construct handler: no corresponding action "
@ -752,6 +761,10 @@ void EmitCaseConstructHandler(const DagInit* d, const char* IndentLevel,
Callback(d->getArg(i), IndentLevel, O);
O << IndentLevel << "}\n";
}
if (DefaultRequired && !DefaultProvided)
throw "Case expression: the 'default' clause is required in this case:\n"
+ d->getAsString();
}
/// EmitForwardOptionPropertyHandlingCode - Helper function used to
@ -985,7 +998,7 @@ void EmitGenerateActionMethod (const ToolProperties& P,
else
EmitCaseConstructHandler(&InitPtrToDagInitRef(P.CmdLine), Indent2,
EmitCmdLineVecFillCallback(Version, P.Name),
OptDescs, O);
true, OptDescs, O);
// For every understood option, emit handling code.
for (ToolOptionDescriptions::const_iterator B = P.OptDescs.begin(),
@ -1273,7 +1286,7 @@ void EmitEdgeClass (unsigned N, const std::string& Target,
<< Indent2 << "unsigned ret = 0;\n";
// Handle the 'case' construct.
EmitCaseConstructHandler(Case, Indent2, IncDecWeight, OptDescs, O);
EmitCaseConstructHandler(Case, Indent2, IncDecWeight, false, OptDescs, O);
O << Indent2 << "return ret;\n"
<< Indent1 << "};\n\n};\n\n";