==================
Symbol declaration
==================

Symbols a, b, c;

---

(source_file
  (declaration_statement
    (identifier)
    (identifier)
    (identifier)))

==================
Function declaration
==================

Functions f, g;

---

(source_file
  (declaration_statement
    (identifier)
    (identifier)))

==================
Vector declaration
==================

Vectors p1, p2, q;

---

(source_file
  (declaration_statement
    (identifier)
    (identifier)
    (identifier)))

==================
Index declaration
==================

Indices mu, nu;

---

(source_file
  (declaration_statement
    (identifier)
    (identifier)))
