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Returns whether PDT evaluation succeeded.

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PopSlime
2023-04-03 17:00:05 +08:00
parent 072703efe7
commit 2e69035618
1 changed files with 7 additions and 4 deletions
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11
Assets/Cryville/Common/Pdt/PdtEvaluatorBase.cs
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@@ -23,16 +23,18 @@ namespace Cryville.Common.Pdt {
/// </summary>
/// <param name="target">The target operator.</param>
/// <param name="exp">The expression to evaluate.</param>
public void Evaluate(PdtOperator target, PdtExpression exp) {
/// <returns>Whether the evaluaton succeeded.</returns>
public bool Evaluate(PdtOperator target, PdtExpression exp) {
_framecount = 0;
_goffset = 0;
_revokepttconst = false;
for (_rip = exp.Instructions.First; _rip != null; _rip = _rip.Next)
_rip.Value.Execute(this);
Operate(target, _framecount, true);
if (!Operate(target, _framecount, true)) return false;
if (exp.IsPotentialConstant) {
exp.IsConstant = exp.IsPotentialConstant = !_revokepttconst;
}
return true;
}
/// <summary>
/// Patches an expression with a lefthand variable and a compound operator.
@@ -184,7 +186,7 @@ namespace Cryville.Common.Pdt {
/// <returns>An operator of the specific name.</returns>
/// <remarks>The parameter count of the returned operator does not necessarily equal to <paramref name="pc" />.</remarks>
protected abstract PdtOperator GetOperator(PdtOperatorSignature sig);
unsafe void Operate(PdtOperator op, int pc, bool noset = false) {
unsafe bool Operate(PdtOperator op, int pc, bool noset = false) {
fixed (byte* pmem = _mem) {
op.Begin(this, pc);
for (int i = 0; i < pc; i++) {
@@ -192,12 +194,13 @@ namespace Cryville.Common.Pdt {
if (frame.Type == PdtInternalType.Error) {
_framecount -= pc - i;
_stack[_framecount++] = new StackFrame { Type = PdtInternalType.Error, Offset = _goffset, Length = 0 };
return;
return false;
}
op.LoadOperand(new PdtVariableMemory(frame.Type, pmem + frame.Offset, frame.Length));
_goffset -= frame.Length;
}
op.Call(pmem + _goffset, noset);
return true;
}
}
internal unsafe void Collapse(int name, LinkedListNode<PdtInstruction> target) {