Compiler Design-Syntactic Phase Errors

Syntactic Phase Errors

Syntactic Errors are detected during the syntax Analysis Phase, The general syntax errors are:

• Structural Errors
• Missing Operators
• Spelling Errors
• Missing Parenthesis
• Extra Parenthesis

For Example: If the “else” keyword is written as “elsee”

Error Recovery

There are four types of Error Recovery methods that are available:

1. Panic Mode Recovery
2. Statement Mode Recovery
3. Error Production
4. Global Correction

Panic Mode Recovery

• In this method, successive characters from the input are removed one at a time until a designated set of synchronizing tokens is found. Synchronizing tokens are deli-meters such as; or }.
• It is easy to implement and does not go into an infinite loop with is an advantage of panic mode recovery.
• A substantial amount of input is omitted without checking for further errors, which is disadvantageous. 

Reference Link

Syntactic Phase Errors