Type Casting

Morph uses the as keyword for type conversions, with maybe for safe (nullable) casts and then for chaining multiple conversion steps.

---

Simple Cast

Convert a value to a different type using as:

value is 10 as int;
value as float;          // convert int → float

---

Nullable Cast with maybe

The maybe modifier makes a cast safe — if the conversion fails, the result is null instead of an error:

value is "hello";
value as maybe int;      // returns null if can't parse as int

Without maybe, a failed cast produces a runtime error. With maybe, it fails gracefully.

---

Cast Pipeline with then

Use then to chain multiple conversion steps in sequence:

value is 10 as int;
value as maybe dynamic then string then float;

This performs a cast pipeline:

1. Cast value to dynamic (nullable — maybe applies to the whole pipeline)
2. Then convert to string
3. Then convert to float

Each step feeds into the next.

---

Parenthesized Cast Steps

You can parenthesize individual steps for explicit nullable control:

value as (maybe int);        // nullable cast to int
value as (maybe float);      // nullable cast to float

---

Pipeline Syntax Summary

Syntax	Meaning
x as int	Cast x to int (error on failure)
x as maybe int	Cast x to int (null on failure)
x as int then string	Cast to int, then to string
x as maybe int then float	Nullable pipeline: int → float
x as (maybe int)	Parenthesized nullable single cast

---

Real Example

From CSharpFeatures.mx:

value is 10 as int;
value as maybe dynamic then string then float;

---

Next Steps

• Constants — Compile-time constant values