odin_parse {odin}

Parse an odin model

Description

Parse an odin model, returning an intermediate representation. The odin_parse_ version is a "standard evaluation" escape hatch.

Usage

odin_parse(x, type = NULL, options = NULL)

odin_parse_(x, options = NULL, type = NULL)

Arguments

x

An expression, character vector or filename with the odin code

type

An optional string indicating the the type of input - must be one of expression, file or text if provided. This skips the type detection code used by odin and makes validating user input easier.

options

odin options; see odin_options. The primary options that affect the parse stage are validate and pretty.

Details

A schema for the intermediate representation is available in the package as schema.json. It is subject to change at this point.

See Also

odin_validate, which wraps this function where parsing might fail, and odin_build for building odin models from an intermediate representation.

Examples

# Parse a model of exponential decay
ir <- odin::odin_parse({
  deriv(y) <- -0.5 * y
  initial(y) <- 1
})

# This is odin's intermediate representation of the model
ir

# If parsing odin models programmatically, it is better to use
# odin_parse_; construct the model as a string, from a file, or as a
# quoted expression:
code <- quote({
  deriv(y) <- -0.5 * y
  initial(y) <- 1
})

odin::odin_parse_(code)