rtk-0.11: test-grammars/debug-test.pg

grammar 'DebugTest';

# This grammar is designed to test all debug options

# Start rule - will be reached
Program = Statement *;

# Various statement types (some will be unreachable)
Statement = Assignment
          | IfStatement
          | WhileLoop
          | Block;

# Reachable rules
Assignment = identifier '=' Expression ';';
Expression = Term (('+' | '-') Term)*;
Term = Factor (('*' | '/') Factor)*;
Factor = identifier | number | '(' Expression ')';

IfStatement = 'if' '(' Expression ')' Statement
            | 'if' '(' Expression ')' Statement 'else' Statement;

WhileLoop = 'while' '(' Expression ')' Statement;

Block = '{' Statement * '}';

# Unreachable rules (to test --unused-rules)
UnusedRule1 = 'unused' identifier;
UnusedRule2 = UnusedRule1 *;

# Lexical rules
identifier = ['a'-'z' 'A'-'Z'] ['a'-'z' 'A'-'Z' '0'-'9']* ;
number = ['0'-'9']+;