Interactive ALGOL 68

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The Interactive ALGOL 68 compiler for ALGOL 68 was made available by Peter Craven of Algol Applications from 1984^[1]. Then in 1994 from OCCL (Oxford and Cambridge Compilers Ltd) until 2004^[2].

1 Platforms
2 Extensions to standard ALGOL 68
- 2.1 Example of code
3 Restrictions to the language from the standard ALGOL 68
4 References
5 See also
6 External links

[edit] Platforms

Inmos Transputer family
Linux for Intel x86 computers
OS/2 version 2.0 and onward
SunOS-4.1.3 (Solaris 1) for SPARC-based computers
Windows 95 and Windows NT for Intel

[edit] Extensions to standard ALGOL 68

Ability to include source code, and versions of source code.
Nestable comments
FORALL syntactic element for looping over arrays.
ANYMODE a union of all MODEs known to the compiler, and hence dynamic typing.
Enhanced coercions (casting) allowing stringer then "strong" coercions.
Enstructuring automatically coerces a variable from type to struct(type)
Conforming coerces UNION (THING, MOODS) to THING, but if that is not the current mood of the union, then a run-time error will be generated.
Library interface to the native operating system and other libraries.
The operator SIZE
Pseudo-operators ANDTH and OREL, and ANF and ORF for Short-circuit evaluation of Boolean expressions.
Arrays can be slices with stride to select a subset of elements.
MOID is treated differently.

[edit] Example of code

MODULE vectors
BEGIN
    INT dim=3;
    MODE VECTOR = [dim]REAL;
    OP + = (VECTOR a, b) VECTOR: ( VECTOR out; FOR i FROM LWB a TO UPB a DO out:=a[i]+b[i] OD; out ),
       - = (VECTOR a, b) VECTOR: ( VECTOR out; FOR i FROM LWB a TO UPB a DO out:=a[i]-b[i] OD; out ),
       DOT = (VECTOR a, b) REAL: ( REAL out:=0; FOR i FROM LWB a TO UPB a DO out+:=a[i]*b[i] OD; out );
END
KEEP VECTOR, +, -, DOT