The NEURON MODeling language

The NMODL transpiler is able to parse all language features and constructs of the NMODL DSL. The programmer is thus able to parse any mechanism file with the NMODL transpiler and process the AST data structures with a few notable exceptions (mainly VERBATIM C blocks).

The transpiler however still lacks code generation support for a some of the language constructs. In the following table we summarize the various NMODL DSL constructs and their support in the transpiler. Code generation information is related to CoreNEURON backend.

NMODL DSL construct	parsing supported	codegen supported	AST docs available
Blocks
PARAMETER	yes	yes	yes
ASSIGNED	yes	yes	yes
STATE	yes	yes	yes
INITIAL	yes	yes	yes
DERIVATIVE	yes	yes	yes
LINEAR	yes	yes	yes
NONLINEAR	yes	yes	yes
FUNCTION	yes	yes	no
PROCEDURE	yes	yes	no
NET_RECEIVE	yes	yes	no
SOLVE	yes	yes	no
BREAKPOINT	yes	yes	yes
KINETIC	yes	yes	no
UNITS	yes	yes	no
NEURON	yes	yes	yes
VERBATIM	yes	yes	no
CONSTANT	yes	no	no
BEFORE	yes	no	no
AFTER	yes	no	no
STEP	yes	no	no
DISCRETE	yes	no	no
FUNCTION_TABLE	yes	yes	no
CONSTRUCTOR	yes	no	yes
DESTRUCTOR	yes	yes	yes
INDEPENDENT	yes	no	yes
Control Flow
WHILE	yes	yes	no
IF	yes	yes	no
ELSE IF	yes	yes	no
ELSE	yes	yes	no
Other
~	yes	yes	no
->	yes	yes	no
FOR_NETCONS	yes	yes	no
LOCAL	yes	yes	no
TITLE	yes	yes	no
DEFINE	yes	yes	no
INCLUDE	yes	yes	no
SWEEP	yes	yes	no
CONDUCTANCE	yes	yes	no
PROTECT	yes	no	no
FROM	yes	yes	no
WATCH	yes	yes	no
MUTEXLOCK	yes	no	no
MUTEXUNLOCK	yes	no	no
CONSERVE	yes	yes	no
COMPARTMENT	yes	yes	no
LONGITUDINAL_DIFFUSION	yes	no	no
LAG	yes	no	no
TABLE	yes	yes	no
USEION	yes	yes	no
READ	yes	yes	no
WRITE	yes	yes	no
VALENCE	yes	yes	no
REPRESENTS	yes	yes	no
NONSPECIFIC_CURRENT	yes	yes	no
ELECTRODE_CURRENT	yes	yes	no
SUFFIX	yes	yes	no
POINT_PROCESS	yes	yes	no
RANGE	yes	yes	no
GLOBAL	yes	yes	no
POINTER	yes	yes	no
BBCOREPOINTER	yes	yes	no
EXTERNAL	yes	no	no
THREADSAFE	yes	yes	no
COMMENT	yes	yes	no
SOLVE METHODs
cnexp	yes	yes
euler	yes	yes
derivimplicit	yes	yes
sparse	yes	yes
runge	yes	no
after_cvode	yes	no
simeq	yes	no
cvode_t	yes	no
cvode_v	yes	no