Given the source code, the compiler tries to first identify the different types of tokens that your code is composed of.Lexical analysis is very similar to this step. And you’re given the task of inferring the meaning of a sentence in that language.Īs a first step, you’ll try identifying the nouns, verbs, or more generally, words that matter. Suppose you’re learning a new language-not a programming language though□. In this section, you’ll learn about lexical analysis. And understand how the compiler works very similarly to how you'd try to understand a sentence. Over the next few minutes, you’ll draw a relatable analogy. Therefore, an AST is a tree data structure that best represents the syntactic structure of the source code.ĭon’t worry if things aren’t clear just yet! The tokens are then parsed into a tree called the syntax tree by the parser.Īn Abstract Syntax Tree (AST) abstracts away certain details and retains just enough information to help the compiler understand the structure of the code. Lexical analysis is also called tokenization. The source code is first split into smaller chunks called tokens through the process of lexical analysis. The steps involved in the compiler’s processing of source code are illustrated below: How Does the Compiler Make Sense of Your Code? In this post, you’ll learn how compilers try to understand what your code does with a focus on what an Abstract Syntax Tree (AST) is, and its relevance to static analysis. However, a compiler has to do much more to make sense of your code. And other developers can read and understand your code with ease. As a developer, the source code that you write is all so concise and elegant.
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