Excerpt from Type Determination for Very High Level LanguagesMany very high level languages are declaration free so that an identifier appearing in a program in such a language need not refer to objects of specific data type. Moreover, the semantic meaning of an Operator symbol may depend on the dynamic types of its operands. This may cause such languages to be interpreted rather than compiled. In the present thesis, we present two methods which alleviate this problem by allowing the compile time detection of runtime types. The first method determines the types of runtime objects from the way these objects are defined, while the second determines the types of runtime objects from the way in which they are used. A setl version of an implemented typefinder incorporating both methods is presented. Examples of the information developed by applying the typefinder to a few programs are also presented. Realization of the type finder in languages of lower level than setl is discussed. Several possible applications of'tmeinformation developed.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.