From cc4c01c69c238c92602b393ed87575ba5edad352 Mon Sep 17 00:00:00 2001
From: Alexander Kiryukhin <i@neonxp.dev>
Date: Fri, 1 Jul 2022 02:16:07 +0300
Subject: first commit

---
 token.go | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 token.go

(limited to 'token.go')

diff --git a/token.go b/token.go
new file mode 100644
index 0000000..17ff6bd
--- /dev/null
+++ b/token.go
@@ -0,0 +1,61 @@
+package expression
+
+import (
+	"fmt"
+	"go/token"
+	"strconv"
+)
+
+type Token struct {
+	Token   token.Token
+	Literal string
+	Pos     int
+}
+
+func (t *Token) Int() (int, bool) {
+	if t.Token != token.INT {
+		return 0, false
+	}
+	i, _ := strconv.Atoi(t.Literal)
+	return i, true
+}
+
+func (t *Token) Float() float64 {
+	i, _ := strconv.ParseFloat(t.Literal, 64)
+	return i
+}
+
+func (t *Token) IsNumber() bool {
+	return t.Token == token.INT || t.Token == token.FLOAT
+}
+
+func (t *Token) LP() bool {
+	return t.Token == token.LPAREN
+}
+
+func (t *Token) RP() bool {
+	return t.Token == token.RPAREN
+}
+
+func (t *Token) IsFunc() bool {
+	return t.Token == token.IDENT
+}
+
+func (t *Token) IsSeparator() bool {
+	return t.Token == token.COMMA
+}
+
+func (t *Token) IsOperator() bool {
+	return t.Token.IsOperator() && !t.LP() && !t.RP()
+}
+
+func (t *Token) IsError() bool {
+	return t.Token != token.ILLEGAL
+}
+
+func (t *Token) Error() error {
+	if t.Token != token.ILLEGAL {
+		return nil
+	}
+	return fmt.Errorf(t.Literal)
+}
-- 
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