if (checkForDisallowedESSymbolOperand(operator)) {

leftType = getBaseTypeOfLiteralType(checkNonNullType(leftType, left));

rightType = getBaseTypeOfLiteralType(checkNonNullType(rightType, right));

}

return booleanType;

case SyntaxKind.EqualsEqualsToken:

tests/cases/conformance/expressions/binaryOperators/comparisonOperator/comparisonOperatorWithNoRelationshipTypeParameter.ts(17,14): error TS2367: This comparison appears to be unintentional because the types 'T' and 'U' have no overlap.

tests/cases/conformance/expressions/binaryOperators/comparisonOperator/comparisonOperatorWithNoRelationshipTypeParameter.ts(18,14): error TS2367: This comparison appears to be unintentional because the types 'T' and 'U' have no overlap.

tests/cases/conformance/expressions/binaryOperators/comparisonOperator/comparisonOperatorWithNoRelationshipTypeParameter.ts(19,14): error TS2367: This comparison appears to be unintentional because the types 'T' and 'U' have no overlap.

enum E { a, b, c }

var a: boolean;

// operator <

var r1a1 = t < a;

var r1a2 = t < b;

var r1a3 = t < c;

var r1a4 = t < d;

var r1a5 = t < e;

var r1a6 = t < f;

var r1a7 = t < g;

var r1b1 = a < t;

var r1b2 = b < t;

var r1b3 = c < t;

var r1b4 = d < t;

var r1b5 = e < t;

var r1b6 = f < t;

var r1b7 = g < t;

// operator >

var r2a1 = t < a;

var r2a2 = t < b;

var r2a3 = t < c;

var r2a4 = t < d;

var r2a5 = t < e;

var r2a6 = t < f;

var r2a7 = t < g;

var r2b1 = a < t;

var r2b2 = b < t;

var r2b3 = c < t;

var r2b4 = d < t;

var r2b5 = e < t;

var r2b6 = f < t;

var r2b7 = g < t;

// operator <=

var r3a1 = t < a;

var r3a2 = t < b;

var r3a3 = t < c;

var r3a4 = t < d;

var r3a5 = t < e;

var r3a6 = t < f;

var r3a7 = t < g;

var r3b1 = a < t;

var r3b2 = b < t;

var r3b3 = c < t;

var r3b4 = d < t;

var r3b5 = e < t;

var r3b6 = f < t;

var r3b7 = g < t;

// operator >=

var r4a1 = t < a;

var r4a2 = t < b;

var r4a3 = t < c;

var r4a4 = t < d;

var r4a5 = t < e;

var r4a6 = t < f;

var r4a7 = t < g;

var r4b1 = a < t;

var r4b2 = b < t;

var r4b3 = c < t;

var r4b4 = d < t;

var r4b5 = e < t;

var r4b6 = f < t;

var r4b7 = g < t;

// operator ==

var r5a1 = t < a;

var r5a2 = t < b;

var r5a3 = t < c;

var r5a4 = t < d;

var r5a5 = t < e;

var r5a6 = t < f;

var r5a7 = t < g;

var r5b1 = a < t;

var r5b2 = b < t;

var r5b3 = c < t;

var r5b4 = d < t;

var r5b5 = e < t;

var r5b6 = f < t;

var r5b7 = g < t;

// operator !=

var r6a1 = t < a;

var r6a2 = t < b;

var r6a3 = t < c;

var r6a4 = t < d;

var r6a5 = t < e;

var r6a6 = t < f;

var r6a7 = t < g;

var r6b1 = a < t;

var r6b2 = b < t;

var r6b3 = c < t;

var r6b4 = d < t;

var r6b5 = e < t;

var r6b6 = f < t;

var r6b7 = g < t;

// operator ===

var r7a1 = t < a;

var r7a2 = t < b;

var r7a3 = t < c;

var r7a4 = t < d;

var r7a5 = t < e;

var r7a6 = t < f;

var r7a7 = t < g;

var r7b1 = a < t;

var r7b2 = b < t;

var r7b3 = c < t;

var r7b4 = d < t;

var r7b5 = e < t;

var r7b6 = f < t;

var r7b7 = g < t;

// operator !==

var r8a1 = t < a;

var r8a2 = t < b;

var r8a3 = t < c;

var r8a4 = t < d;

var r8a5 = t < e;

var r8a6 = t < f;

var r8a7 = t < g;

var r8b1 = a < t;

var r8b2 = b < t;

var r8b3 = c < t;

var r8b4 = d < t;

var r8b5 = e < t;

var r8b6 = f < t;

var r8b7 = g < t;

}