Introduction

The EDEN language has a number of C-like statements and operators. C programmers may find it familiar but they are still advised to go through this chapter since there are new data types and operators. Not all C operators have been implemented.

An EDEN program is a list of statements. Each statement can be one of the followings: formula definitions, action specifications, function (procedure) definitions and C-like procedural statements.

program:
        statement program

When a procedural statement is encountered, this statement will be executed. The effect of execution is to evaluate an expression, assign values to variables or call other functions/procedures (these must be defined earlier). The order of statements reflects the order of execution, and thus affects the results of computation. The user is responsible for arranging the statements in proper order to get the correct results.

In addition, the EDEN interpreter will do the (re-)calculation of the formula definitions and/or invoke the procedures defined by the action specifications automatically. The order of calculation of formula definitions and execution of actions should not be of concern to the user, and is fully controlled by the interpreter.

The dependency-link command is an alternative way of specifying actions. The query command inspects the current definitions of the objects.