Module preprocess 

Regex-driven preprocessing pipeline.

MilkEvaluator::preprocess_expression is the entry point: it strips comments, normalises case, auto-initialises undefined variables, then chains the rewriter passes in super::rewriters and super::gmegabuf to massage MD2’s EEL2 dialect into something evalexpr will accept.

Constants

MAX_EXPRESSION_LENGTH 🔒

Maximum expression length to prevent DoS attacks.

MAX_LOOP_ITER 🔒

Clamp on loop(N, body) iteration count. MD2 presets in the corpus run up to 1024 * 1024 (gmegabuf full-clear); allow that plus a small safety margin so a single rogue preset can’t lock the frame thread for arbitrarily long.

Statics

ASSIGNMENT_REGEX 🔒

DOT_LITERAL_REGEX 🔒

IF_REGEX 🔒

PAREN_INT_RHS_REGEX 🔒

UNARY_PLUS_REGEX 🔒

VAR_REGEX 🔒

Functions

auto_init_vars 🔒

Walk every identifier in expr and auto-init unknown variables to 0.

lowercase_builtin_idents 🔒

Lowercase any identifier that matches a registered builtin (Sin → sin, INT → int, Above → above, etc.) while leaving user variables at their original case. MD2 EEL is case-insensitive; evalexpr is not.

strip_line_comments 🔒

Strip C++-style // … line comments from MD2 expression source.