| Category | Symbol | Usage | Lexical Scope |
|---|
| Intra-Literal | \ | Escape Prefix for LF and TAB | Within Quoted Literals |
' | Digit Separator | Within Number Literals |
. | Decimal Point | Within Real Number Literals |
+ - | Exponent Sign |
Special
Operators | :: | Type Conversion | Within Expressions |
== | Identity Test | Within ADT Expressions |
& | Array, List and String Concatenation | Within Array, List and String Expressions |
Arithmetic
Operators | + | Unary Plus, Addition | Within Arithmetic Expressions |
- | Unary Minus, Subtraction |
* | Multiplication |
/ | Real Division |
*. | Dot Product |
Relational
Operators | = | Equality Test | Within Arithmetic Expressions |
# | Inequality Test |
> | Greater-Than Test |
>= | Greater-Or-Equal Test |
< | Less-Than Test |
<= | Less-Or-Equal Test |
Set
Operators | + | Set Union | Within Set Expressions |
\ | Set Difference |
* | Set Intersection |
/ | Symmetric Set Difference |
> | Proper Superset Test |
>= | Superset Test |
< | Proper Subset Test |
<= | Subset Test |
| Special Syntax | + | Re-Export Suffix, Enumeration Extension Prefix | |
* | Wildcard Import Suffix, Restricted Export Prefix | |
:= | Assignment | |
++ | Increment Statement Suffix, FOR Loop Ascender | |
-- | Decrement Statement Suffix, FOR Loop Descender | |
.. | Subrange Constructor, Slice Range Specifier | |
^ | Pointer Dereferencing Suffix | |
-> | One-Way Dependency | Blueprint |
<> | Mutual Dependency Constraint | Blueprint |
>< | Mutual Exclusion Constraint | Blueprint |
+/- | Unary Minus Binding Specifier | Blueprint |
| Punctuation | . | Name Separator | Within Qualified Identifier |
| Module Terminator | End of Module |
, | Item Separator | Within Item List |
; | List Separator | Within Declaration and Statement Sequences |
: | Head Body Separator | Within Declarations and Formal Parameters |
| | Case Label Prefix | Within Case Label List |
| Terminator Prefix | Within Formal Parameters |
| Delimiters | ' " | Quoted String Literal Delimiters | Within Expressions |
( ) | Expression Grouping, Parameter List Delimiters | Within Expressions, Procedure Headers |
{ } | Structured Value Delimiters | Within Expressions, Formal Parameters |
[ ] | Array Index, Subrange and Slice Delimiters | Within Expressions |
<< >> | Replacement Text Delimiters | Within Library Generation Directive |
| Comments | ! | Line Comment Prefix | At First Column of Any Line |
(* *) | Block Comment Delimiters | Anywhere Before or After a Token |
| Pragmas | ? | Value Pragma Query Prefix | Within Message Pragma |
<* *> | Pragma Delimiters | Before or After Certain Tokens |