[ Term I/O | Reference Manual | Alphabetic Index ]

writeclause(?Clause)

The clause Clause is pretty printed on the current output .
Clause
A Prolog term.

Description

Used to pretty print the clause Clause on the current output according to the current operator declarations.

When reading Prolog clauses from one file, and then writing to the current output, the latter part can be done using writeclause/1. This is because the clauses are terminated by a period and a newline, which are not retained by Prolog. writeclause/1 replaces these, and flushes the output.

writeclause/1,2 knows about the special meaning of ,/2, ;/2, ->/2, fg, -->/2 and :-/2 and prints the clause with the appropriate indentation of subgoals and some (redundant) parentheses to show the clause structure. Everything else is written as with writeq/1,2, so output of writeclause/1,2 is readable for read/1,2.

Modes and Determinism

Modules

This predicate is sensitive to its module context (tool predicate, see @/2).

Examples

	Equivalent to writeclause(output, Term).  (see writeclause/2 for details).

See Also

writeq / 1, writeclause / 2