org.quasiliteral.base
Interface ValueMaker

All Known Implementing Classes:

QAstro, Substituter

public interface ValueMaker

Untamed: Represents a template of a value (a quasi literal value) to be filled in by args to make an actual value.

Author:

Mark S. Miller

Method Summary

Object

substitute(ConstList args) Enabled: Each each arg to fill in the corresponding hole, and return the resulting value.

Method Detail

substitute

public Object substitute(ConstList args)

Enabled: Each each arg to fill in the corresponding hole, and return the resulting value.

It is often appropriate to think of

• a ValueMaker as an expression,
• substitution as expression evaluation,
• the 'args' array as the environment,
• dollar-holes as variable names (actually numbers) to be looked up in the environment, and
• the result as the value the expression evaluated to.

In this sense, we can think of E's quasiliteral framework as an means for the non-privileged extension of the expression evaluation machinery.