Gforth 0.6.2 by Crook N.

By Crook N.

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When foo executes, it pushes the address of the body onto the stack, then (in the code after the does>) fetches the 5 from there. The stack comment near the does> reflects the stack effect of the defined word, not the stack effect of the code after the does> (the difference is that the code expects the address of the body that the stack comment does not show). You can use these definition words to do factoring in cases that involve (other) definition words. , a field offset is always added to an address.

Is an immediate word, it executes at the time that greet is defined. When it executes, its behaviour is to search forward in the input line looking for the delimiter. When it finds the delimiter, it updates >IN to point past the delimiter. It also compiles some magic code into the definition of greet; the xt of a run-time routine that prints a text string. It compiles the string Hello and welcome into memory so that it is available to be printed later. When the text interpreter gains control, the next word it finds in the input stream is ; and so it terminates the definition of greet.

Can you write a program that extracts a section of a text file, given the line that starts and the line that terminates that section? 27 Interpretation and Compilation Semantics and Immediacy When a word is compiled, it behaves differently from being interpreted. , consider +: 1 2 + . : foo + ; These two behaviours are known as compilation and interpretation semantics. , +), the compilation semantics is to append the interpretation semantics to the currently defined word (foo in the example above).

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