yapcad.dsl.runtime package

Submodules

yapcad.dsl.runtime.builtins module

Built-in function registry for DSL interpreter.

Maps DSL function names to yapCAD implementations.

TODO: Add missing 2D curve primitives:

• ellipse(center, major, minor, rotation?) -> ellipse

• parabola(vertex, focus) -> parabola

• hyperbola(center, a, b) -> hyperbola

Types are defined in types.py but constructors not yet implemented. See yapCAD core: yapcad.geom.Ellipse, yapcad.geom.conic_arc

TODO: Move involute_gear to yapcad.stdlib.gears package

High-level parametric constructions (gears, fasteners) should be DSL modules in a standard library, not hardcoded builtins. This allows: - Multiple implementations (figgear vs other algorithms) - User customization and extension - Proper namespace management (use gears.involute)

TODO: Add fastener primitives via yapcad.stdlib.fasteners package

• hex_bolt(standard, size, length) using existing fastener catalog

• hex_nut(standard, size)

• washer(standard, size)

• threaded_hole(standard, size, depth, tapped?)

See: yapcad.contrib.fasteners for existing implementation

class yapcad.dsl.runtime.builtins.BuiltinFunction(name: str, signature: FunctionSignature, implementation: Callable[[...], Value], doc: str = '')

Bases: object

A built-in function with its implementation and type signature.

doc: str = ''

implementation: Callable[[...], Value]

name: str

signature: FunctionSignature

class yapcad.dsl.runtime.builtins.BuiltinRegistry

Bases: object

Registry of all built-in functions.

Functions are registered by name and can be looked up for execution.

get_function(name: str) → BuiltinFunction | None

Look up a function by name.

get_method(type_name: str, method_name: str) → BuiltinFunction | None

Look up a method by type and method name.

register(func: BuiltinFunction) → None

Register a function.

register_method(type_name: str, func: BuiltinFunction) → None

Register a method for a specific type.

yapcad.dsl.runtime.builtins.call_builtin(name: str, args: List[Value]) → Value

Call a built-in function by name.

Raises RuntimeError if function not found.

yapcad.dsl.runtime.builtins.call_method(type_name: str, method_name: str, receiver: Value, args: List[Value]) → Value

Call a method on a value.

Raises RuntimeError if method not found.

yapcad.dsl.runtime.builtins.get_builtin_registry() → BuiltinRegistry

Get the global built-in function registry.

yapcad.dsl.runtime.context module

Execution context for DSL interpreter.

Manages variable scopes, tracks execution state, and collects errors/warnings.

class yapcad.dsl.runtime.context.ExecutionContext(current_scope: ~yapcad.dsl.runtime.context.Scope = <factory>, module_name: str = '', command_name: str = '', parameters: ~typing.Dict[str, ~typing.Any] = <factory>, emit_result: ~yapcad.dsl.runtime.values.EmitResult | None = None, require_failures: ~typing.List[~yapcad.dsl.runtime.values.RequireFailure] = <factory>, diagnostics: ~yapcad.dsl.errors.DiagnosticCollector = <factory>, source_lines: ~typing.List[str] = <factory>, _should_return: bool = False, _return_value: ~yapcad.dsl.runtime.values.Value | None = None)

Bases: object

The full execution context for interpreting DSL code.

Tracks: - Variable scopes - Require failures - Emit result - Diagnostics (errors/warnings) - Module/command being executed

add_error(message: str, span: SourceSpan) → None

Add an error diagnostic.

add_require_failure(message: str, expression_text: str = None) → None

Record a require constraint failure.

add_warning(message: str, span: SourceSpan) → None

Add a warning diagnostic.

clear_return() → None

Clear the return signal (used after handling return).

command_name: str = ''

current_scope: Scope

diagnostics: DiagnosticCollector

emit_result: EmitResult | None = None

get_variable(name: str) → Value | None

Look up a variable in the current scope chain.

property has_errors: bool

Check if any errors occurred.

property has_warnings: bool

Check if any warnings occurred.

module_name: str = ''

new_scope(name: str = 'block')

Context manager to create a new nested scope.

Usage:

with ctx.new_scope(“for-loop”):

# variables defined here are local to this scope ctx.set_variable(“i”, int_val(0))

parameters: Dict[str, Any]

require_failures: List[RequireFailure]

property return_value: Value | None

Get the return value if early return was signaled.

set_emit(value: Value, metadata: Dict[str, Any] = None) → None

Set the emit result for this command.

set_variable(name: str, value: Value) → None

Define a new variable in the current scope.

property should_return: bool

Check if early return was signaled.

signal_return(value: Value) → None

Signal an early return from a command.

source_lines: List[str]

update_variable(name: str, value: Value) → bool

Update an existing variable (for assignment statements).

class yapcad.dsl.runtime.context.Scope(variables: ~typing.Dict[str, ~yapcad.dsl.runtime.values.Value] = <factory>, parent: ~yapcad.dsl.runtime.context.Scope | None = None, name: str = 'anonymous')

Bases: object

A single scope containing variable bindings.

Scopes form a chain via the parent field for lexical scoping.

contains(name: str) → bool

Check if a variable exists in this scope or parents.

get(name: str) → Value | None

Look up a variable in this scope or parent scopes.

name: str = 'anonymous'

parent: Scope | None = None

set(name: str, value: Value) → None

Set a variable in this scope (shadowing parent if exists).

update(name: str, value: Value) → bool

Update an existing variable (mutable assignment).

Searches up the scope chain to find where the variable is defined. Returns True if found and updated, False if not found.

variables: Dict[str, Value]

yapcad.dsl.runtime.context.create_context(module_name: str, command_name: str, parameters: Dict[str, Value], source: str = '') → ExecutionContext

Create a new execution context for a command invocation.

Parameters:

• module_name – The module being executed

• command_name – The command being executed

• parameters – Parameter values passed to the command

• source – The source code (for error messages)

Returns:

A fresh ExecutionContext with parameters bound in scope

yapcad.dsl.runtime.interpreter module

Tree-walking interpreter for DSL execution.

Evaluates AST nodes to produce geometry and other values.

class yapcad.dsl.runtime.interpreter.ExecutionResult(success: bool, emit_result: ~yapcad.dsl.runtime.values.EmitResult | None = None, require_failures: ~typing.List[~yapcad.dsl.runtime.values.RequireFailure] = <factory>, provenance: ~yapcad.dsl.runtime.provenance.Provenance | None = None, error_message: str | None = None)

Bases: object

Result of executing a command.

emit_result: EmitResult | None = None

error_message: str | None = None

property geometry: Any

Get the emitted geometry data.

property metadata: Dict[str, Any]

Get the emit metadata.

provenance: Provenance | None = None

require_failures: List[RequireFailure]

success: bool

class yapcad.dsl.runtime.interpreter.Interpreter(transforms: List[Callable[[Module], Module]] = None)

Bases: object

Tree-walking interpreter for DSL execution.

Evaluates AST nodes by dispatching to type-specific methods.

execute(module: Module, command_name: str, parameters: Dict[str, Any], source: str = '') → ExecutionResult

Execute a command from a module.

Parameters:

• module – The parsed and type-checked module

• command_name – Name of the command to execute

• parameters – Parameter values (raw Python values, not wrapped)

• source – Original source code for error messages

Returns:

ExecutionResult with geometry and provenance

yapcad.dsl.runtime.interpreter.compile_and_run(source: str, command_name: str, parameters: Dict[str, Any]) → ExecutionResult

High-level API to compile and run DSL source code in one call.

This is the simplest way to execute DSL code:

from yapcad.dsl import compile_and_run

result = compile_and_run(‘’’

module my_design; command MAKE_BOX(w: float, h: float, d: float) -> solid {

emit box(w, h, d);

}

‘’’, “MAKE_BOX”, {“w”: 10.0, “h”: 20.0, “d”: 5.0})

if result.success:

geometry = result.geometry

else:

print(f”Error: {result.error_message}”)

Parameters:

• source – DSL source code as a string

• command_name – Name of the command to execute

• parameters – Parameter values (raw Python values)

Returns:

ExecutionResult with geometry, provenance, and any errors

yapcad.dsl.runtime.interpreter.execute(module: Module, command_name: str, parameters: Dict[str, Any], source: str = '') → ExecutionResult

Execute a command from a module.

This is a convenience wrapper around Interpreter.execute().

yapcad.dsl.runtime.provenance module

Provenance tracking for DSL execution.

Captures invocation metadata for audit trails and reproducibility.

class yapcad.dsl.runtime.provenance.Provenance(module_name: str, command_name: str, version: str = '0.0.0', parameters: ~typing.Dict[str, ~typing.Any] = <factory>, source_signature: str = '', timestamp: str = <factory>, extra: ~typing.Dict[str, ~typing.Any] = <factory>)

Bases: object

Provenance information for a DSL command execution.

This metadata is attached to emitted geometry to enable: - Reproducibility: Re-run with same parameters - Audit trail: Track what generated each piece of geometry - Version control: Detect if source changed

command_name: str

extra: Dict[str, Any]

classmethod from_dict(data: Dict[str, Any]) → Provenance

Create from dictionary.

module_name: str

parameters: Dict[str, Any]

source_signature: str = ''

timestamp: str

to_dict() → Dict[str, Any]

Convert to dictionary for serialization.

to_json() → str

Convert to JSON string.

version: str = '0.0.0'

yapcad.dsl.runtime.provenance.compute_source_signature(source: str) → str

Compute a signature for source code.

Uses SHA-256 hash of the normalized source.

yapcad.dsl.runtime.provenance.create_provenance(module_name: str, command_name: str, parameters: Dict[str, Any], source: str = '', version: str = '0.0.0', **extra: Any) → Provenance

Create a Provenance record for a command execution.

Parameters:

• module_name – Name of the DSL module

• command_name – Name of the command being executed

• parameters – Parameter values passed to the command

• source – Original source code (for signature)

• version – Version of the module

• **extra – Additional metadata to include

Returns:

A Provenance record

yapcad.dsl.runtime.provenance.verify_source_signature(source: str, signature: str) → bool

Verify that source code matches a signature.

Parameters:

• source – The source code to verify

• signature – The expected signature (e.g., “sha256:abc123…”)

Returns:

True if the source matches the signature

yapcad.dsl.runtime.values module

Runtime value wrappers for DSL interpreter.

Values wrap Python/yapCAD objects with DSL type metadata for runtime type checking and provenance tracking.

class yapcad.dsl.runtime.values.EmitResult(value: ~yapcad.dsl.runtime.values.Value, metadata: ~typing.Dict[str, ~typing.Any] = <factory>)

Bases: object

Result of an emit statement - the final output of a command.

Contains the emitted geometry plus any metadata attached via with {…}.

property data: Any

Get the raw geometry data.

metadata: Dict[str, Any]

property type: Type

Get the DSL type.

value: Value

class yapcad.dsl.runtime.values.RequireFailure(message: str, expression_text: str | None = None)

Bases: object

Represents a failed require constraint.

Used to collect all require failures during execution rather than stopping at the first one.

expression_text: str | None = None

message: str

class yapcad.dsl.runtime.values.Value(data: Any, type: Type)

Bases: object

A runtime value with DSL type information.

The data field holds the actual Python/yapCAD object. The type field holds the DSL type for runtime validation.

data: Any

is_truthy() → bool

Check if this value is truthy in boolean context.

type: Type

yapcad.dsl.runtime.values.bool_val(b: bool) → Value

Create a boolean value.

yapcad.dsl.runtime.values.check_type(value: Value, expected: Type) → bool

Check if a value’s type is assignable to expected type.

yapcad.dsl.runtime.values.coerce_numeric(value: Value) → Value

Coerce int to float if needed.

yapcad.dsl.runtime.values.dict_val(items: Dict[str, Value]) → Value

Create a dict value.

yapcad.dsl.runtime.values.float_val(x: float) → Value

Create a float value.

yapcad.dsl.runtime.values.int_val(n: int) → Value

Create an integer value.

yapcad.dsl.runtime.values.list_val(items: List[Value], element_type: Type) → Value

Create a list value from a list of Values.

yapcad.dsl.runtime.values.none_val(inner_type: Type) → Value

Create a None value for an optional type.

yapcad.dsl.runtime.values.path3d_val(path_data: Any) → Value

Create a path3d value (3D curve/spine for sweeps).

yapcad.dsl.runtime.values.point_val(coords: Any, is_2d: bool = False) → Value

Create a point value (2D or 3D).

yapcad.dsl.runtime.values.region2d_val(region_data: Any) → Value

Create a region2d value.

yapcad.dsl.runtime.values.shell_val(shell_data: Any) → Value

Create a shell value.

yapcad.dsl.runtime.values.solid_val(solid_data: Any) → Value

Create a solid value.

yapcad.dsl.runtime.values.string_val(s: str) → Value

Create a string value.

yapcad.dsl.runtime.values.surface_val(surface_data: Any) → Value

Create a surface value.

yapcad.dsl.runtime.values.transform_val(matrix: Any) → Value

Create a transform value.

yapcad.dsl.runtime.values.unwrap_value(v: Value) → Any

Extract the raw Python/yapCAD data from a Value.

yapcad.dsl.runtime.values.unwrap_values(values: List[Value]) → List[Any]

Extract raw data from a list of Values.

yapcad.dsl.runtime.values.vector_val(coords: Any, is_2d: bool = False) → Value

Create a vector value (2D or 3D).

yapcad.dsl.runtime.values.wrap_value(data: Any, dsl_type: Type) → Value

Wrap raw data with a DSL type.

Module contents

DSL Runtime - Tree-walking interpreter for DSL execution.

This module provides: - Interpreter: Executes DSL commands to generate geometry - Value: Runtime value wrappers with type metadata - ExecutionContext: Variable scope management - Provenance: Invocation metadata for audit trails - BuiltinRegistry: Built-in function implementations

class yapcad.dsl.runtime.BuiltinFunction(name: str, signature: FunctionSignature, implementation: Callable[[...], Value], doc: str = '')

Bases: object

A built-in function with its implementation and type signature.

doc: str = ''

implementation: Callable[[...], Value]

name: str

signature: FunctionSignature

class yapcad.dsl.runtime.BuiltinRegistry

Bases: object

Registry of all built-in functions.

Functions are registered by name and can be looked up for execution.

get_function(name: str) → BuiltinFunction | None

Look up a function by name.

get_method(type_name: str, method_name: str) → BuiltinFunction | None

Look up a method by type and method name.

register(func: BuiltinFunction) → None

Register a function.

register_method(type_name: str, func: BuiltinFunction) → None

Register a method for a specific type.

class yapcad.dsl.runtime.EmitResult(value: ~yapcad.dsl.runtime.values.Value, metadata: ~typing.Dict[str, ~typing.Any] = <factory>)

Bases: object

Result of an emit statement - the final output of a command.

Contains the emitted geometry plus any metadata attached via with {…}.

property data: Any

Get the raw geometry data.

metadata: Dict[str, Any]

property type: Type

Get the DSL type.

value: Value

class yapcad.dsl.runtime.ExecutionContext(current_scope: ~yapcad.dsl.runtime.context.Scope = <factory>, module_name: str = '', command_name: str = '', parameters: ~typing.Dict[str, ~typing.Any] = <factory>, emit_result: ~yapcad.dsl.runtime.values.EmitResult | None = None, require_failures: ~typing.List[~yapcad.dsl.runtime.values.RequireFailure] = <factory>, diagnostics: ~yapcad.dsl.errors.DiagnosticCollector = <factory>, source_lines: ~typing.List[str] = <factory>, _should_return: bool = False, _return_value: ~yapcad.dsl.runtime.values.Value | None = None)

Bases: object

The full execution context for interpreting DSL code.

Tracks: - Variable scopes - Require failures - Emit result - Diagnostics (errors/warnings) - Module/command being executed

add_error(message: str, span: SourceSpan) → None

Add an error diagnostic.

add_require_failure(message: str, expression_text: str = None) → None

Record a require constraint failure.

add_warning(message: str, span: SourceSpan) → None

Add a warning diagnostic.

clear_return() → None

Clear the return signal (used after handling return).

command_name: str = ''

current_scope: Scope

diagnostics: DiagnosticCollector

emit_result: EmitResult | None = None

get_variable(name: str) → Value | None

Look up a variable in the current scope chain.

property has_errors: bool

Check if any errors occurred.

property has_warnings: bool

Check if any warnings occurred.

module_name: str = ''

new_scope(name: str = 'block')

Context manager to create a new nested scope.

Usage:

with ctx.new_scope(“for-loop”):

# variables defined here are local to this scope ctx.set_variable(“i”, int_val(0))

parameters: Dict[str, Any]

require_failures: List[RequireFailure]

property return_value: Value | None

Get the return value if early return was signaled.

set_emit(value: Value, metadata: Dict[str, Any] = None) → None

Set the emit result for this command.

set_variable(name: str, value: Value) → None

Define a new variable in the current scope.

property should_return: bool

Check if early return was signaled.

signal_return(value: Value) → None

Signal an early return from a command.

source_lines: List[str]

update_variable(name: str, value: Value) → bool

Update an existing variable (for assignment statements).

class yapcad.dsl.runtime.ExecutionResult(success: bool, emit_result: ~yapcad.dsl.runtime.values.EmitResult | None = None, require_failures: ~typing.List[~yapcad.dsl.runtime.values.RequireFailure] = <factory>, provenance: ~yapcad.dsl.runtime.provenance.Provenance | None = None, error_message: str | None = None)

Bases: object

Result of executing a command.

emit_result: EmitResult | None = None

error_message: str | None = None

property geometry: Any

Get the emitted geometry data.

property metadata: Dict[str, Any]

Get the emit metadata.

provenance: Provenance | None = None

require_failures: List[RequireFailure]

success: bool

class yapcad.dsl.runtime.Interpreter(transforms: List[Callable[[Module], Module]] = None)

Bases: object

Tree-walking interpreter for DSL execution.

Evaluates AST nodes by dispatching to type-specific methods.

execute(module: Module, command_name: str, parameters: Dict[str, Any], source: str = '') → ExecutionResult

Execute a command from a module.

Parameters:

• module – The parsed and type-checked module

• command_name – Name of the command to execute

• parameters – Parameter values (raw Python values, not wrapped)

• source – Original source code for error messages

Returns:

ExecutionResult with geometry and provenance

class yapcad.dsl.runtime.Provenance(module_name: str, command_name: str, version: str = '0.0.0', parameters: ~typing.Dict[str, ~typing.Any] = <factory>, source_signature: str = '', timestamp: str = <factory>, extra: ~typing.Dict[str, ~typing.Any] = <factory>)

Bases: object

Provenance information for a DSL command execution.

This metadata is attached to emitted geometry to enable: - Reproducibility: Re-run with same parameters - Audit trail: Track what generated each piece of geometry - Version control: Detect if source changed

command_name: str

extra: Dict[str, Any]

classmethod from_dict(data: Dict[str, Any]) → Provenance

Create from dictionary.

module_name: str

parameters: Dict[str, Any]

source_signature: str = ''

timestamp: str

to_dict() → Dict[str, Any]

Convert to dictionary for serialization.

to_json() → str

Convert to JSON string.

version: str = '0.0.0'

class yapcad.dsl.runtime.RequireFailure(message: str, expression_text: str | None = None)

Bases: object

Represents a failed require constraint.

Used to collect all require failures during execution rather than stopping at the first one.

expression_text: str | None = None

message: str

class yapcad.dsl.runtime.Scope(variables: ~typing.Dict[str, ~yapcad.dsl.runtime.values.Value] = <factory>, parent: ~yapcad.dsl.runtime.context.Scope | None = None, name: str = 'anonymous')

Bases: object

A single scope containing variable bindings.

Scopes form a chain via the parent field for lexical scoping.

contains(name: str) → bool

Check if a variable exists in this scope or parents.

get(name: str) → Value | None

Look up a variable in this scope or parent scopes.

name: str = 'anonymous'

parent: Scope | None = None

set(name: str, value: Value) → None

Set a variable in this scope (shadowing parent if exists).

update(name: str, value: Value) → bool

Update an existing variable (mutable assignment).

Searches up the scope chain to find where the variable is defined. Returns True if found and updated, False if not found.

variables: Dict[str, Value]

class yapcad.dsl.runtime.Value(data: Any, type: Type)

Bases: object

A runtime value with DSL type information.

The data field holds the actual Python/yapCAD object. The type field holds the DSL type for runtime validation.

data: Any

is_truthy() → bool

Check if this value is truthy in boolean context.

type: Type

yapcad.dsl.runtime.bool_val(b: bool) → Value

Create a boolean value.

yapcad.dsl.runtime.call_builtin(name: str, args: List[Value]) → Value

Call a built-in function by name.

Raises RuntimeError if function not found.

yapcad.dsl.runtime.call_method(type_name: str, method_name: str, receiver: Value, args: List[Value]) → Value

Call a method on a value.

Raises RuntimeError if method not found.

yapcad.dsl.runtime.check_type(value: Value, expected: Type) → bool

Check if a value’s type is assignable to expected type.

yapcad.dsl.runtime.coerce_numeric(value: Value) → Value

Coerce int to float if needed.

yapcad.dsl.runtime.compile_and_run(source: str, command_name: str, parameters: Dict[str, Any]) → ExecutionResult

High-level API to compile and run DSL source code in one call.

This is the simplest way to execute DSL code:

from yapcad.dsl import compile_and_run

result = compile_and_run(‘’’

module my_design; command MAKE_BOX(w: float, h: float, d: float) -> solid {

emit box(w, h, d);

}

‘’’, “MAKE_BOX”, {“w”: 10.0, “h”: 20.0, “d”: 5.0})

if result.success:

geometry = result.geometry

else:

print(f”Error: {result.error_message}”)

Parameters:

• source – DSL source code as a string

• command_name – Name of the command to execute

• parameters – Parameter values (raw Python values)

Returns:

ExecutionResult with geometry, provenance, and any errors

yapcad.dsl.runtime.compute_source_signature(source: str) → str

Compute a signature for source code.

Uses SHA-256 hash of the normalized source.

yapcad.dsl.runtime.create_context(module_name: str, command_name: str, parameters: Dict[str, Value], source: str = '') → ExecutionContext

Create a new execution context for a command invocation.

Parameters:

• module_name – The module being executed

• command_name – The command being executed

• parameters – Parameter values passed to the command

• source – The source code (for error messages)

Returns:

A fresh ExecutionContext with parameters bound in scope

yapcad.dsl.runtime.create_provenance(module_name: str, command_name: str, parameters: Dict[str, Any], source: str = '', version: str = '0.0.0', **extra: Any) → Provenance

Create a Provenance record for a command execution.

Parameters:

• module_name – Name of the DSL module

• command_name – Name of the command being executed

• parameters – Parameter values passed to the command

• source – Original source code (for signature)

• version – Version of the module

• **extra – Additional metadata to include

Returns:

A Provenance record

yapcad.dsl.runtime.dict_val(items: Dict[str, Value]) → Value

Create a dict value.

yapcad.dsl.runtime.execute(module: Module, command_name: str, parameters: Dict[str, Any], source: str = '') → ExecutionResult

Execute a command from a module.

This is a convenience wrapper around Interpreter.execute().

yapcad.dsl.runtime.float_val(x: float) → Value

Create a float value.

yapcad.dsl.runtime.get_builtin_registry() → BuiltinRegistry

Get the global built-in function registry.

yapcad.dsl.runtime.int_val(n: int) → Value

Create an integer value.

yapcad.dsl.runtime.list_val(items: List[Value], element_type: Type) → Value

Create a list value from a list of Values.

yapcad.dsl.runtime.none_val(inner_type: Type) → Value

Create a None value for an optional type.

yapcad.dsl.runtime.point_val(coords: Any, is_2d: bool = False) → Value

Create a point value (2D or 3D).

yapcad.dsl.runtime.region2d_val(region_data: Any) → Value

Create a region2d value.

yapcad.dsl.runtime.shell_val(shell_data: Any) → Value

Create a shell value.

yapcad.dsl.runtime.solid_val(solid_data: Any) → Value

Create a solid value.

yapcad.dsl.runtime.string_val(s: str) → Value

Create a string value.

yapcad.dsl.runtime.surface_val(surface_data: Any) → Value

Create a surface value.

yapcad.dsl.runtime.transform_val(matrix: Any) → Value

Create a transform value.

yapcad.dsl.runtime.unwrap_value(v: Value) → Any

Extract the raw Python/yapCAD data from a Value.

yapcad.dsl.runtime.unwrap_values(values: List[Value]) → List[Any]

Extract raw data from a list of Values.

yapcad.dsl.runtime.vector_val(coords: Any, is_2d: bool = False) → Value

Create a vector value (2D or 3D).

yapcad.dsl.runtime.verify_source_signature(source: str, signature: str) → bool

Verify that source code matches a signature.

Parameters:

• source – The source code to verify

• signature – The expected signature (e.g., “sha256:abc123…”)

Returns:

True if the source matches the signature

yapcad.dsl.runtime.wrap_value(data: Any, dsl_type: Type) → Value

Wrap raw data with a DSL type.