036 expression parameter

// Test: Expression Parameter Syntax
// Verifies that Expression parameters are parsed correctly and generate valid Zig code

const std = @import("std");

// Event with Expression parameter - comptime only
~[comptime]event log_expr { expr: Expression }

// Proc that receives the expression as []const u8
~proc log_expr {
    std.debug.print("Expression: {s}\n", .{expr});
}

// Invoke with implicit expr parameter (named 'expr' enables implicit mapping)
~log_expr(2 + 2)

// Test function call with nested parens - inner commas should NOT split the expression
~log_expr(foo(x, y, z))

// Event with multiple Expression parameters - first is implicit 'expr', others must be named
~[comptime]event multi_expr { expr: Expression, guard: Expression }

~proc multi_expr {
    std.debug.print("Main: {s}, Guard: {s}\n", .{expr, guard});
}

// First arg maps to implicit 'expr', second must be explicitly named
~multi_expr(a + b, guard: x > 0)

// Test with function call containing commas in both positions
~multi_expr(compute(a, b), guard: validate(x, y))