52 lines
1.0 KiB
Java
52 lines
1.0 KiB
Java
class JSBoolean extends JSValue {
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static JSBoolean JSTrue = new JSBoolean(true);
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static JSBoolean JSFalse = new JSBoolean(false);
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private JSBoolean(boolean p)
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{
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b = p;
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}
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void eval(Environment theEnv)
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{
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theEnv.theStack.push(this);
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}
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boolean isTrue()
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{
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return b;
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}
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boolean isFalse()
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{
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return !b;
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}
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void bang(Environment theEnv) {
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theEnv.theStack.push((b) ? JSFalse : JSTrue);
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}
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void typeof(Environment theEnv) {
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theEnv.theStack.push(new JSString("boolean"));
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}
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JSBoolean toJSBoolean(Environment theEnv) {
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return this;
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}
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JSValue toPrimitive(Environment theEnv, String hint) {
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return this;
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}
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JSString toJSString(Environment theEnv) {
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return (b) ? new JSString("true") : new JSString("false");
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}
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JSDouble toJSDouble(Environment theEnv) {
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return (b) ? new JSDouble(1) : new JSDouble(0);
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}
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boolean b;
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} |