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Explain the purpose and phases of a compiler design.
A compiler is a program that translates input in a high-level code to output in a target code, which can be machine code or another language. The phases of a compiler design include lexical analysis, syntax analysis, syntax-directed translation, intermediate code generation, code optimization, and code generation.
What is the purpose of lexical analysis in a compiler?
The purpose of lexical analysis is to generate a sequence of tokens from the input high-level code. These tokens represent the lexemes or valid words in the code, such as keywords, identifiers, operators, constants, and punctuation symbols.
What are lexical errors and give examples?
Lexical errors occur during lexical analysis when the code does not follow specified patterns or rules. Examples of lexical errors include using an invalid character sequence, starting an identifier with a digit, or using a variable without declaring it.
Explain the concept of error handling in a compiler.
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What are some common tokens generated during lexical analysis?
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Study Notes
Compiler Design Overview
- A compiler is a program that transforms high-level code into target code, which can be machine code or another language.
Compiler Phases
- The compiler consists of multiple phases, including:
- Lexical analysis
- Syntax analysis
- Syntax-directed translation
- Intermediate code generation
- Code optimization
- Code generation
Lexical Analysis
- Lexical analysis is the first phase of the compiler.
- It takes high-level code as input and generates a sequence of tokens.
- Tokens represent lexemes or valid words in the code.
- Common tokens include:
- Keywords
- Identifiers
- Operators
- Constants
- Punctuation symbols
Lexical Errors
- Lexical errors occur when the code does not follow specified patterns or rules.
- Examples of lexical errors:
- Using an invalid character sequence
- Starting an identifier with a digit
- Using a variable without declaring it
Error Handling
- Error handling is essential in each phase of the compiler.
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Description
Test your knowledge of compiler design with this quiz covering topics such as lexical analysis, syntax analysis, intermediate code generation, code optimization, and code generation. Assess your understanding of the key phases involved in transforming high-level code into target code.
