`dpmcore.services.syntax`

Grammar-level validation of DPM-XL expressions. Requires no database — it only runs the ANTLR parser, so it can be used standalone.

SyntaxService

class dpmcore.services.syntax.SyntaxService[source]

Validate and parse DPM-XL expression syntax.

This service is stateless and does not require a database connection.

Build a stateless syntax validator.

validate(expression)[source]

Validate the syntax of expression.

Returns a SyntaxResult — never raises on invalid syntax.

parse(expression)[source]

Parse expression and return the AST root node.

Raises on syntax errors.

is_valid(expression)[source]

Quick boolean check.

class dpmcore.services.syntax.SyntaxResult(is_valid, error_message, expression)[source]

Outcome of a syntax validation.

Parameters: