Support for structured types

When the -Struct: Support for structured types assembler option is activated, the Macro Assembler also supports the definition and usage of structured types. This allows an easier way to access ANSI-C structured variable in the Macro Assembler.

In order to provide an efficient support for structured type the macro assembler should provide notation to:

• Define a structured type. See Structured type definition.
• Define a structured variable. See Variable definition.
• Declare a structured variable. See Variable declaration.
• Access the address of a field inside of a structured variable. See Accessing a field address
• Access the offset of a field inside of a structured variable. See Accessing a field offset.
  Note: Some limitations apply in the usage of the structured types in the Macro Assembler. See Structured type: Limitations.

• Structured type definition
  
• Types allowed for structured type fields
  
• Variable definition
  
• Variable declaration
  
• Accessing a structured variable