50 lines
940 B
Go
50 lines
940 B
Go
package shsh;
|
|
|
|
import (
|
|
"strings"
|
|
)
|
|
|
|
type Token struct {
|
|
next *Token
|
|
tag parse_tag
|
|
_inner interface{}
|
|
}
|
|
|
|
func Lex(input string) Token {
|
|
ret := new(Token)
|
|
iter := &ret
|
|
delim := ' '
|
|
var tok strings.Builder
|
|
iter_alloced := false
|
|
|
|
for pos, char := range input {
|
|
switch char {
|
|
// TODO: User configurable delimiters
|
|
case '\'', '"', '`':
|
|
delim = char
|
|
case '(':
|
|
delim = ')'
|
|
|
|
case delim:
|
|
*iter = new(Token)
|
|
*iter._inner = tok.String()
|
|
iter_alloced = true
|
|
delim = ' '
|
|
|
|
default:
|
|
tok.WriteRune(char)
|
|
}
|
|
|
|
if iter_alloced {
|
|
iter = &(*iter.next)
|
|
iter_alloced = false
|
|
tok.Reset()
|
|
}
|
|
}
|
|
}
|
|
|
|
func eval(Token *tree) *Token {
|
|
// Find operations
|
|
// Simplify operations deepest first
|
|
// return tree of final Tokens
|
|
}
|