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fc574c320b
* Fix #17: Add const local variable support to ChaiScript Adds `const var`, `const auto`, and `const` as variable declaration syntax that creates immutable local variables. A const_override flag on Boxed_Value enables script-level constness without changing the C++ type system integration. The parser, optimizer, and evaluator are extended with Const_Var_Decl and Const_Assign_Decl AST nodes that mirror their non-const counterparts but mark the value as const after initialization. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Address review: remove const_override, set const flag directly on Type_Info Replace the m_const_override bool on Boxed_Value::Data with a Type_Info::make_const() method that sets the const bit in m_flags directly. This ensures constness is visible everywhere consistently, including places that check get_type_info().is_const() directly. Requested by @lefticus in PR #643 review. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> --------- Co-authored-by: leftibot <leftibot@users.noreply.github.com> Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
22 lines
633 B
ChaiScript
22 lines
633 B
ChaiScript
// Test const variable declarations
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const var x = 5
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assert_equal(5, x)
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// Test that const variables cannot be reassigned
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assert_throws("Error: \"Error, cannot assign to constant value.\"", fun() { const var y = 10; y = 20 })
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// Test const with auto keyword
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const auto z = "hello"
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assert_equal("hello", z)
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// Test that const auto variables cannot be reassigned
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assert_throws("Error: \"Error, cannot assign to constant value.\"", fun() { const auto w = 3; w = 4 })
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// Test is_var_const on const var
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const var c = 42
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assert_true(c.is_var_const())
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// Test that non-const var is not const
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var nc = 42
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assert_false(nc.is_var_const())
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