parser: float1 == float2 uses machine epsilon by default

vlib/builtin/int.v

@@ -29,6 +29,15 @@ pub fn ptr_str(ptr voidptr) string {
 pub fn (a f64) eq(b f64) bool {
 	return C.fabs(a - b) <= C.DBL_EPSILON	
 }
+pub fn (a f32) eq(b f32) bool {
+	return C.fabsf(a - b) <= C.FLT_EPSILON	
+}
+pub fn (a f64) eqbit(b f64) bool {
+	return C.DEFAULT_EQUAL(a, b)
+}
+pub fn (a f32) eqbit(b f32) bool {
+	return C.DEFAULT_EQUAL(a, b)
+}
 
 // fn (nn i32) str() string {
 // return i

vlib/builtin/int_test.v

@@ -11,6 +11,20 @@ fn test_const() {
 	assert u == 1 // make sure this works without the cast
 }
 
+fn test_float_equal_operator() {
+	mut a := f32(1)
+	a += 0.000001
+	a -= 0.000001
+	assert a == 1
+	assert !a.eqbit(1)
+
+	a = f64(1)
+	a += 0.000001
+	a -= 0.000001
+	assert a == 1
+	assert !a.eqbit(1)
+}
+
 fn test_str_methods() {
 	assert i8(1).str() == '1'
 	assert i8(-1).str() == '-1'