Current char being parsed

Add a hint.

Return the unique ID of this instance.

Increment the line count

Increment the line number (for error reporting). Should only be called by the lexer.

Insert a 'useparam' instruction in front of instruction 'opnum', to reference the symbols in 'params'.

Add an instruction.

Add an argument to the last instruction.

Called after an instruction (after args and hints)

Add a jump target to the last instruction.

returns distance to nearest hit or 0

Is it a normal?

Is it a struct constructor?

Is this typespec a single structure? Caveat: Returns false if it's an array of structs. N.B. You can find out which struct with structure().

Is it a user-defined function (as opposed to an OSL built-in)?

Is it a vector?

Is it a simple vector-like triple (point, vector, or normal, but not an array or closure)?

the individual 'isFOOray' functions are deprecated

Return the layer number that we currently examining.

Return the line number (for error reporting). Should only be called by the lexer.

A is the head of a list of nodes, return a pointer to the n-th node in the list (or NULL if the list isn't long enough).

Flatten a list of nodes (headed by A) into a vector of node refs (vec).

A is the head of a list of nodes, traverse the list and compute the length of the list.

Return the basic block of the exit for the whole instance.

Just like llvm_load_arg(sym,deriv), except use use sym's derivs as-is, no coercion.

Non-array version of llvm_load_value, with default deriv & component.

Non-array version of llvm_store_value, with default deriv & component.

Generate the appropriate llvm type definition for a TypeSpec (this is the actual type, for example when we allocate it). Allocates ptrs for closures.