FluxParser

#include "parser.h"
#include "ast.h"

// Simple expressions
double result = parse_expression("2 + 3 * 4");
// => 14.0

// With variables
double vals[] = {5.0, 10.0};
VarContext ctx = {.values = vals, .count = 2};
result = parse_expression_with_vars("a + b * 2", &ctx);
// => 25.0

// Symbolic differentiation
ASTNode *expr = parse_to_ast("x^2 + 3*x");
ASTNode *deriv = ast_differentiate(expr, "x");
// => 2*x + 3

// Numerical solving: sin(x) = 0.5
ASTNode *eq = parse_to_ast("sin(x) - 0.5");
NumericalSolveResult r = ast_solve_numerical(
    eq, "x", 0.5, 1e-12, 100
);
// x = 0.523599 (π/6), converges in 3 iterations