Diif bw parser and interpreter
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An interpreter is a computer program that directly executes source code or translates source code into an intermediate representation to immediately execute. A parser is a program that breaks input like source code instructions or markup tags into parts like nouns, verbs, and attributes, and checks that all necessary input is provided. Parsers are often part of interpreters or compilers and check syntax to build a parse tree from tokens created by a lexical analyzer.
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![Interpreter: interpreter normally means a computer
program that executes
An interpreter may be a program that either
1. executes the source code directly
2. translates source code into some efficient
intermediate representation (code) and immediately
executes this
3. explicitly executes stored precompiled code[1] made
by a compiler which is part of the interpreter system
OR it interprets the machine while executing](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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The compiler is software that converts source code written in a high-level language into machine code. It works in two major phases - analysis and synthesis. The analysis phase performs lexical analysis, syntax analysis, and semantic analysis to generate an intermediate representation from the source code. The synthesis phase performs code optimization and code generation to create the target machine code from the intermediate representation. The compiler uses various components like a symbol table, parser, and code generator to perform this translation.
Concept of compiler in details
This document provides an overview of the key components and phases of a compiler. It discusses that a compiler translates a program written in a source language into an equivalent program in a target language. The main phases of a compiler are lexical analysis, syntax analysis, semantic analysis, intermediate code generation, code optimization, code generation, and symbol table management. Each phase performs important processing that ultimately results in a program in the target language that is equivalent to the original source program.
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Diif bw parser and interpreter
- 2. Interpreter: interpreter normally means a computer program that executes An interpreter may be a program that either 1. executes the source code directly 2. translates source code into some efficient intermediate representation (code) and immediately executes this 3. explicitly executes stored precompiled code[1] made by a compiler which is part of the interpreter system OR it interprets the machine while executing
- 3. Parser: Parser is a computer program usually a part of compiler that receives input form of sequential source program instructions, interactive online commands, markup tags, or some other defined interface and breaks them up into parts (for example, the nouns (objects), verbs (methods), and their attributes or options) that can then be managed by other programming (for example, other components in a compiler). A parser may also check to see that all input has been provided that is necessary.
- 4. A parser is one of the components in an interpreter or compiler, which checks for correct syntax and builds a data structure (often some kind of parse tree, abstract syntax tree or other hierarchical structure) implicit in the input tokens. The parser often uses a separate lexical analyser to create tokens from the sequence of input characters. Parsers may be programmed by hand or may be semi-automatically generated (in some programming language) by a tool (such as Yacc) from a grammar written in Backus-Naur form.