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Types

Types define the values that scripts can declare, pass to registered routines and read from object members. The tree separates Data Types, Enumerations, Arrays, Sets, Records and References because each category has different assignment and access rules.

Common tasks​

  • Use Data Types for scalar and built-in-compatible values.
  • Use Enumerations for one named value from a closed domain and Sets for combinations of enumeration values.
  • Use Arrays for indexed collections and check their bounds before access.
  • Use Records for structured values whose fields are documented under the record owner.
  • Use References for aliases and reference-like types registered by the scripting compiler.

Important behaviour​

A type name is available only when the compiler registration for the current script context includes it. Assignment compatibility follows the embedded PascalScript compiler and can be narrower than current Delphi. Variant conversions occur at runtime and can raise conversion, range or null-operation errors.

Record fields are value members; object properties belong under Classes. Arrays and strings can have different indexing or ownership rules depending on the registered type. Aliases share an underlying representation but can still be useful because declarations require the registered public name.

Edge cases and quirks​

Do not assume a Delphi type's complete API or memory layout is exposed. The Code Library documents the registered scripting representation, its members and relevant conversion boundaries. Platform size, Unicode/ANSI behaviour, date precision and numeric overflow are stated on the applicable child page.

  • Constants — named values typed by these declarations.
  • Functions — parameters and results that use these types.
  • Classes — reference-type objects with callable members.