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EDT:EGL Language

General Notes

  • This document is not finished yet!
  • "N/S" means Not Supported.
  • Anything that exists in RBD but isn't mentioned here is not included in EDT.
  • The work in the Core category includes the parser, model, and validation.

Table 1: Part Types

Part Types Core JavaScript Java Debug
DataItem1



Function2



Top-level function2



Delegate2



Record




Structed Record
N/S N/S N/S
ExternalType




Handler




Library




Service




Interface3




Enumeration




Program4

N/S


Array




Nullability




DataTable
N/S N/S N/S
Form
N/S N/S N/S

Notes on Table 1

  1. In RBD a DataItem can only be used for primitive types.  In EDT it can be used for any type.
  2. See also Table 2: Function Parameters.
  3. Interfaces can be implemented by services and handlers (every kind of "logic part" which can be instantiated).
  4. There are no called programs. Use libraries for "local calls" and services for "remote calls".

Table 2: Function Parameters

Function Parameters Core JavaScript Java Debug
In1



Out



Inout1



Ellipsis



Const



Field
N/S N/S N/S
SqlNullable
N/S N/S N/S

Notes on Table 2

  1. The default parameter modifier is In for references and Inout for values.

Table 3: Primitive Types

Primitive Types Core JavaScript Java Debug
Any



Boolean



Dictionary



String(N)1



String2



Timestamp3



Blob
N/S


Clob
N/S


Smallint



Int



Bigint



Decimal(N,M)



Decimal(N)



Decimal4



Float



Smallfloat



Number5



Byte(N)6



Byte7



Arraydictionary
N/S N/S N/S
Char
N/S N/S N/S
Dbchar
N/S N/S N/S
Mbchar
N/S N/S N/S
Unicode
N/S N/S N/S
Hex6
N/S N/S N/S
Date3
N/S N/S N/S
Time3
N/S N/S N/S
Interval3
N/S N/S N/S
Bin
N/S N/S N/S
Num
N/S N/S N/S
Numc
N/S N/S N/S
Pacf
N/S N/S N/S
Money
N/S N/S N/S

Notes on Table 3

  1. String(N) is a reference type in EDT.
  2. String is a reference type in EDT.
  3. Timestamp is the only supported date/time type. Use it in place of RBD's date, time, and interval. Date/time math produces timestamps or numbers.
  4. Decimal with no length or decimals is a reference type with an immutable value.
  5. Number is a reference type with an immutable value. Unlike in RBD, number variables can be declared anywhere a variable declaration is allowed.
  6. Byte(N) is a value type similar to RBD's hex. N indicates the number of bytes in the value.
  7. Byte with no length is a reference type with an immutable value of any length.

Table 4: Statements

Statements Core JavaScript Java Debug
Variable declaration



Const declaration



Assignment



Move1

N/S

N/S

N/S
Return



Function invocation



Call2



Label



Transfer
N/S


Throw



Try



Case



If



While



For



Foreach3



Exit



Continue



Empty statement (a semicolon)



Add
N/S


Close
N/S


Delete
N/S


Get
N/S


Replace
N/S


Execute4
N/S


Prepare4
N/S


Open4
N/S


FreeSQL4
N/S


Goto
N/S N/S N/S
Set
N/S N/S N/S
Converse
N/S N/S N/S
Display
N/S N/S N/S
Print
N/S N/S N/S
Forward
N/S N/S N/S
Show
N/S N/S N/S
OpenUI
N/S N/S N/S

Notes on Table 4

  1. In RBD, a move statement between two references does a deep copy. Reference types should include a deep copy function to provide the same functionality in EDT.
  2. EDT doesn't have called programs, but services and native programs can be called.
  3. EDT's foreach statement will support iterating over an array.
  4. Support for these statements is tentative, pending the design for JPA in EDT.

What's left...

  • Operators and expressions
  • Conversions
  • Stereotypes
  • Annotations
  • Language compliance test