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Updated Programming language specification (Gemstone) (markdown)

servostar 2024-01-25 13:42:37 +01:00
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Programming-language-specification-(Gemstone).md

@ -8,12 +8,15 @@ The most fundamental types of data. They provide the base upon everything else i
| `int` | 4 | signed integer stored as two's complement with the MSB representing the sign bit | | `int` | 4 | signed integer stored as two's complement with the MSB representing the sign bit |
| `float` | 4 | signed single precision floating point as specified by IEEE-754 | | `float` | 4 | signed single precision floating point as specified by IEEE-754 |
### Automatic type coercion
Primitive types `int` and `float` are automatically converted into each other upon need. This is a lossy conversion. A float may not have the precision to store every digit of a given integer. Likewise the fraction of any float will be truncated.
## Composite data types ## Composite data types
Primitive data types provide the foundation upon which direct derivations can be built. The derivations of primitive types we call composite types. A composite type modifies or extends the definition of a primitive or another composite type. Primitive data types provide the foundation upon which direct derivations can be built. The derivations of primitive types we call composite types. A composite type modifies or extends the definition of a primitive or another composite type.
Extensions or modifications can mean adding or removing a sign bit, exchanging the arithmetic model, etc. Extensions or modifications can mean adding or removing a sign bit, exchanging the arithmetic model, etc.
The declaration of a composite data type is made with the following syntax: The declaration of a composite data type is made with the following syntax:
`typedef <sign> <scale> <base> $name` `<sign> <scale> <base> = $name`
### Sign ### Sign
The `<sign>` is a keyword specifying whether to implement a sign bit or not. Possible values are: The `<sign>` is a keyword specifying whether to implement a sign bit or not. Possible values are: