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(ns cljcc.token)
(def token-kind
#{:eof
:semicolon
;; brackets
:left-curly
:right-curly
:left-paren
:right-paren
;; operators
:multiply
:divide
:remainder
:plus
:minus
:logical-not
:logical-and
:logical-or
:equal-to
:not-equal-to
:less-than
:greater-than
:less-than-equal-to
:greater-than-equal-to
:bitwise-left-shift
:bitwise-right-shift
:ampersand
:bitwise-xor
:bitwise-or
:negate
:assignemnt
:assignment-plus
:assignment-multiply
:assignment-minus
:assignment-divide
:assignment-mod
:assignment-bitwise-and
:assignment-bitwise-or
:assignment-bitwise-xor
:assignment-bitwise-left-shift
:assignment-bitwise-right-shift
:increment
:decrement
:number
:identifier
;; keywords
:kw-return
:kw-int
:kw-void})
(def unary-ops
#{:logical-not
:complement
:hyphen})
(def assignment-ops
#{:assignment
:assignment-plus
:assignment-multiply
:assignment-minus
:assignment-divide
:assignment-mod
:assignment-bitwise-and
:assignment-bitwise-or
:assignment-bitwise-xor
:assignment-bitwise-left-shift
:assignment-bitwise-right-shift})
(defn assignment-op? [op]
(contains? assignment-ops op))
(defn unary-op? [op]
(contains? unary-ops op))
(def bin-ops
"Binary operands and their precedence."
{:multiply 100
:divide 100
:remainder 100
:plus 90
:hyphen 90
:bitwise-left-shift 80
:bitwise-right-shift 80
:less-than 70
:less-than-equal-to 70
:greater-than 70
:greater-than-equal-to 70
:equal-to 60
:not-equal-to 60
:ampersand 50
:bitwise-xor 40
:bitwise-or 30
:logical-and 20
:logical-or 10
:question 5
:assignment 1
:assignment-plus 1
:assignment-multiply 1
:assignment-minus 1
:assignment-divide 1
:assignment-mod 1
:assignment-bitwise-and 1
:assignment-bitwise-or 1
:assignment-bitwise-xor 1
:assignment-bitwise-left-shift 1
:assignment-bitwise-right-shift 1})
(defn binary-op? [op]
(contains? bin-ops op))
(defn precedence [op]
(op bin-ops))
(def chrs-kind-map
{\( :left-paren
\) :right-paren
\? :question
\: :colon
\{ :left-curly
\} :right-curly
\= :assignment
"--" :decrement
"++" :increment
"<<" :bitwise-left-shift
">>" :bitwise-right-shift
\! :logical-not
"&&" :logical-and
"||" :logical-or
"==" :equal-to
"!=" :not-equal-to
\< :less-than
\> :greater-than
"<=" :less-than-equal-to
">=" :greater-than-equal-to
"+=" :assignment-plus
"*=" :assignment-multiply
"-=" :assignment-minus
"/=" :assignment-divide
"%=" :assignment-mod
"&=" :assignment-bitwise-and
"|=" :assignment-bitwise-or
"^=" :assignment-bitwise-xor
"<<=" :assignment-bitwise-left-shift
">>=" :assignment-bitwise-right-shift
\^ :bitwise-xor
\| :bitwise-or
\& :ampersand
\; :semicolon
\+ :plus
\- :hyphen
\~ :complement
\* :multiply
\% :remainder
\/ :divide})
(defn identifier->kind [identifier]
(case identifier
"return" :kw-return
"void" :kw-void
"int" :kw-int
"if" :kw-if
"else" :kw-else
"do" :kw-do
"while" :kw-while
"for" :kw-for
"break" :kw-break
"continue" :kw-continue
:identifier))
(defn create
([kind line col]
{:kind kind
:line line
:col col})
([kind line col literal]
{:kind kind
:line line
:col col
:literal literal}))
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