public void ArrayAccess_Assign_SystemIndex()
{
var xs = Expression.Parameter(typeof(string[]));
var i = Expression.Parameter(typeof(Index));
var s = Expression.Parameter(typeof(string));
var res = Expression.Lambda <Func <string[], Index, string, string> >(CSharpExpression.Assign(CSharpExpression.ArrayAccess(xs, i), s), xs, i, s);
var f = res.Compile();
var vals = new string[] { "bar", "foo", "qux" };
for (int j = 0; j < vals.Length; j++)
{
var newVal = vals[j].ToUpper();
var assignRes = f(vals, new Index(j), newVal);
Assert.AreEqual(newVal, assignRes);
Assert.AreEqual(newVal, vals[j]);
}
for (int j = 1; j <= vals.Length; j++)
{
var k = new Index(j, fromEnd: true);
var newVal = vals[k].ToLower();
var assignRes = f(vals, k, newVal);
Assert.AreEqual(newVal, assignRes);
Assert.AreEqual(newVal, vals[k]);
}
}
public void ArrayAccess_Assign_SideEffects()
{
AssertCompile((log, append) =>
{
var array = Expression.Block(log("A"), Expression.Constant(new[] { 42 }));
var index = Expression.Block(log("I"), Expression.Constant(0));
var val = Expression.Block(log("V"), Expression.Constant(43));
return(CSharpExpression.Assign(CSharpExpression.ArrayAccess(array, index), val));
}, new LogAndResult <object> {
Log = { "A", "I", "V" }
});
AssertCompile((log, append) =>
{
var array = Expression.Block(log("A"), Expression.Constant(new[] { 42 }));
var index = Expression.Block(log("I"), Expression.Constant(new Index(0)));
var val = Expression.Block(log("V"), Expression.Constant(43));
return(CSharpExpression.Assign(CSharpExpression.ArrayAccess(array, index), val));
}, new LogAndResult <object> {
Log = { "A", "I", "V" }
});
AssertCompile((log, append) =>
{
var array = Expression.Block(log("A"), Expression.Constant(new[, ] {
{ 42 }
}));
var index1 = Expression.Block(log("I1"), Expression.Constant(0));
var index2 = Expression.Block(log("I2"), Expression.Constant(0));
var val = Expression.Block(log("V"), Expression.Constant(43));
return(CSharpExpression.Assign(CSharpExpression.ArrayAccess(array, index1, index2), val));
}, new LogAndResult <object> {
Log = { "A", "I1", "I2", "V" }
});
}
public void ArrayAccess_Assign_Int32()
{
var xs = Expression.Parameter(typeof(string[]));
var i = Expression.Parameter(typeof(int));
var s = Expression.Parameter(typeof(string));
var res = Expression.Lambda <Func <string[], int, string, string> >(CSharpExpression.Assign(CSharpExpression.ArrayAccess(xs, i), s), xs, i, s);
var f = res.Compile();
var vals = new string[] { "bar", "foo", "qux" };
for (int j = 0; j < vals.Length; j++)
{
var newVal = vals[j].ToUpper();
var assignRes = f(vals, j, newVal);
Assert.AreEqual(newVal, assignRes);
Assert.AreEqual(newVal, vals[j]);
}
}