SHS/pkg/shsh/parsers.go

// TODO: think about package names
// Should we have one for all our code?
package shsh

import (
    "strings"
)

/*
 * LIST: a list of elements
 * OPERAND: a string or number
 * OPERATOR: an entry in a symtable
 * OPERATION: a list starting with an operator
 */
type parse_tag int
const (
    LIST_T      parse_tag = iota
    OPERAND_T   parse_tag = iota
    OPERATOR_T  parse_tag = iota
    OPERATION_T parse_tag = iota
)

func Parse(arg *Token) {
    switch arg.tag {
    case LIST_T:
        for i := arg; i; i = i.next {
            Parse(i)
        }

        if list_is_operation(arg) {
            arg.tag = OPERATION_T
        }

    case OPERAND_T:
        if string_is_operator(arg._inner) {
            arg.tag = OPERATOR_T
        }

    default:
        ;// TODO: Tag a parse error?
    }
}

func string_delimiters_valid(arg string) bool {
    // TODO: Enhance this function
    go
}

func list_is_operation(arg *Token) bool {

}

func string_is_operator(arg string) bool {

}