A comprehensive C language grammar parser library written in Rust, implementing the C23 standard (ISO/IEC 9899:2023).

This library supports all major C23 features including:

• Lexical Elements: Keywords, identifiers, constants, string literals, and punctuators
• Expressions: All expression types from primary expressions to complex compound expressions
• Declarations: Variable declarations, function declarations, and type declarations
• Statements: Control flow, loops, jumps, and compound statements
• Functions: Function definitions with parameter lists and variadic arguments
• Preprocessor: Basic preprocessing token support
• Modern C Features:
  • Binary constants (0b prefix)
  • Digit separators in numeric literals
  • _BitInt type specifier
  • typeof and typeof_unqual operators
  • _Decimal128, _Decimal32, _Decimal64 types
  • And many more C23 additions

Add this to your Cargo.toml:

[dependencies]
cgrammar = "0.2.0"

use cgrammar::*;
fn main() {
 let source_code = r#"
 int main() {
 printf("Hello, World!\n");
 return 0;
 }
 "#;
 // Tokenize the source code
 let (tokens, _) = lex(source_code, None);
 // Parse into AST
 let result = translation_unit().parse(tokens.as_input());
 if let Some(ast) = result.output() {
 println!("Successfully parsed!");
 println!("{:#?}", ast);
 } else {
 eprintln!("Parse failed!");
 // Handle errors...
 }
}

This project is licensed under the Apache-2.0 License - see the LICENSE file for details.