dispatch.h

#include "parser.h"
#include "ast/ast_parse.h"


static void HandleFunction() {
  if (ast_function *F = parse_function())
  {
    if (!F->Codegen())
    {
      fprintf(stderr, "Error reading function definition:");
    }
  } else {
    // Skip token for error recovery.
    parser::get()->get_next_token();
  }
}


static void HandleExtern() {
  if (ast_function_prototype *P = ParseExtern()) {
    if (!P->Codegen()) {
      fprintf(stderr, "Error reading extern");
    }
  } else {
    // Skip token for error recovery.
    parser::get()->get_next_token();
  }
}

static void HandleTopLevelExpression() {
  // Evaluate a top-level expression into an anonymous function.
  if (ast_function *F = ParseTopLevelExpr()) {
    if (!F->Codegen()) {
      fprintf(stderr, "Error generating code for top level expr\n");
    }
  } else {
    // Skip token for error recovery.
    parser::get()->get_next_token();
  }
}

/// top ::= definition | external | expression | ';'
static void MainLoop() {
  while (1) {
    switch ( parser::get()->get_current_token() )
    {
      case tok_function:
        HandleFunction();
        break;

      case tok_extern:
        HandleExtern();
        break;

      default:
        HandleTopLevelExpression();
        break;

      case tok_eof:
        return;
    }
  }
}