LC

Implement an LR(1) Parser Table by Hand for a Small Grammar

hard7/8

Build a Pratt Parser (Top-Down Operator Precedence)Use Yacc/Bison to Generate a Parser and Understand the Output

Language

Compiler

2.0s Limit 256MB

Implementation

Implement an LR(1) parser table by hand for a simple expression grammar.

Requirements:

Define grammar: E → E + T | T, T → T * F | F, F → (E) | number
Build canonical collection of LR(1) items
Construct ACTION and GOTO tables manually
Implement LR(1) parsing algorithm with stack
Handle shift, reduce, accept, and error actions
Resolve conflicts (if any)
Test with various expressions

Why This Matters

LR parsing is the theory inside yacc, Bison, and tree-sitter — the incremental parser GitHub uses for syntax highlighting across every repository. Building an LR(1) table by hand demystifies shift/reduce conflicts, so the next time Bison reports one you can read the automaton state instead of adding a precedence hack blindly.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0