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COMPONENT PASCAL

COMPONENT PASCAL - Programming language

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COMPONENT PASCAL is a programming language created in 1997.

#740on PLDB 26Years Old 200Users
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Example from Linguist:
MODULE ObxFact; (** project = "BlackBox" organization = "www.oberon.ch" contributors = "Oberon microsystems" version = "System/Rsrc/About" copyright = "System/Rsrc/About" license = "Docu/BB-License" changes = "" issues = "" **) IMPORT Stores, Models, TextModels, TextControllers, Integers; PROCEDURE Read(r: TextModels.Reader; VAR x: Integers.Integer); VAR i, len, beg: INTEGER; ch: CHAR; buf: POINTER TO ARRAY OF CHAR; BEGIN r.ReadChar(ch); WHILE ~r.eot & (ch <= " ") DO r.ReadChar(ch) END; ASSERT(~r.eot & (((ch >= "0") & (ch <= "9")) OR (ch = "-"))); beg := r.Pos() - 1; len := 0; REPEAT INC(len); r.ReadChar(ch) UNTIL r.eot OR (ch < "0") OR (ch > "9"); NEW(buf, len + 1); i := 0; r.SetPos(beg); REPEAT r.ReadChar(buf[i]); INC(i) UNTIL i = len; buf[i] := 0X; Integers.ConvertFromString(buf^, x) END Read; PROCEDURE Write(w: TextModels.Writer; x: Integers.Integer); VAR i: INTEGER; BEGIN IF Integers.Sign(x) < 0 THEN w.WriteChar("-") END; i := Integers.Digits10Of(x); IF i # 0 THEN REPEAT DEC(i); w.WriteChar(Integers.ThisDigit10(x, i)) UNTIL i = 0 ELSE w.WriteChar("0") END END Write; PROCEDURE Compute*; VAR beg, end, i, n: INTEGER; ch: CHAR; s: Stores.Operation; r: TextModels.Reader; w: TextModels.Writer; attr: TextModels.Attributes; c: TextControllers.Controller; x: Integers.Integer; BEGIN c := TextControllers.Focus(); IF (c # NIL) & c.HasSelection() THEN c.GetSelection(beg, end); r := c.text.NewReader(NIL); r.SetPos(beg); r.ReadChar(ch); WHILE ~r.eot & (beg < end) & (ch <= " ") DO r.ReadChar(ch); INC(beg) END; IF ~r.eot & (beg < end) THEN r.ReadPrev; Read(r, x); end := r.Pos(); r.ReadPrev; attr :=r.attr; IF (Integers.Sign(x) > 0) & (Integers.Compare(x, Integers.Long(MAX(LONGINT))) <= 0) THEN n := SHORT(Integers.Short(x)); i := 2; x := Integers.Long(1); WHILE i <= n DO x := Integers.Product(x, Integers.Long(i)); INC(i) END; Models.BeginScript(c.text, "computation", s); c.text.Delete(beg, end); w := c.text.NewWriter(NIL); w.SetPos(beg); w.SetAttr(attr); Write(w, x); Models.EndScript(c.text, s) END END END END Compute; END ObxFact.

Language features

Feature Supported Token Example
Comments
(* A comment
*)
MultiLine Comments (* *)
(* A comment
*)
Strings
"Hello world"
Print() Debugging
Assignment
Pointers
Semantic Indentation X
asciidots.html · component-pascal.html · zephyr-asdl.html

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