Provides the ~EXPR sigil for compile-time expression validation and optional pre-parsing.

Usage

import Expression.Sigil

# Validate syntax at compile time, return string at runtime
expr = ~EXPR"SUM(contact.age, 10)"

# Pre-parse to AST at compile time — zero runtime parse cost
ast = ~EXPR"SUM(contact.age, 10)"c

# Compile error on invalid syntax
bad = ~EXPR"SUM(contact.age,"
#=> ** (CompileError) invalid expression: ...

The default mode validates that the expression is syntactically correct during compilation but returns the original string for runtime parsing. This catches typos and syntax errors at build time.

The c modifier pre-compiles the expression to its AST representation, eliminating runtime parsing entirely. Use this for expressions embedded in Elixir source that are evaluated repeatedly.