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Tighten type rules on for loops

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This commit is contained in:
James Roseborough
2009-01-28 18:39:41 +00:00
parent d690d5b210
commit 67bdc8dbc9
1 changed files with 8 additions and 2 deletions
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10
src/core/org/luaj/vm/LuaState.java
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@@ -786,9 +786,15 @@ public class LuaState extends Lua {
continue;
}
case LuaState.OP_FORPREP: {
init = this.stack[base + a];
step = this.stack[base + a + 2];
init = this.stack[base + a].luaToNumber();
limit = this.stack[base + a + 1].luaToNumber();
step = this.stack[base + a + 2].luaToNumber();
if ( init.isNil() ) error("'for' initial value must be a number");
if ( limit.isNil() ) error("'for' limit must be a number");
if ( step.isNil() ) error("'for' step must be a number");
this.stack[base + a] = step.luaBinOpUnknown(Lua.OP_SUB, init);
this.stack[base + a + 1] = limit;
this.stack[base + a + 2] = step;
b = LuaState.GETARG_sBx(i);
ci.pc += b;
continue;