add functions and variables name

src/variable.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"strings"
+)
+
+var variableCompile = makeRegex(`([a-zA-Z_])([a-zA-Z0-9_])*`)
+
+var blockedVariableNames = map[string]bool{
+	"if":       true,
+	"else":     true,
+	"elif":     true,
+	"while":    true,
+	"for":      true,
+	"break":    true,
+	"continue": true,
+	"return":   true,
+	"let":      true,
+	"import":   true,
+	"from":     true,
+	"do":       true,
+}
+
+type variableValue struct {
+	VAL    any
+	EXISTS any
+	origin string
+}
+
+type accessVariable struct {
+	name string
+	line int
+	code string
+	path string
+}
+
+func isVariable(code UNPARSEcode) bool {
+	return variableCompile.MatchString(code.code)
+}
+
+func parseVariable(code UNPARSEcode) (accessVariable, bool, ArErr, int) {
+	name := strings.TrimSpace(code.code)
+	if blockedVariableNames[name] {
+		return accessVariable{}, false, ArErr{"Naming Error", "Naming Error: \"" + name + "\" is a reserved keyword", code.line, code.path, code.realcode, true}, 1
+	}
+	return accessVariable{name: name, code: code.code, line: code.line}, true, ArErr{}, 1
+}
+
+func readVariable(v accessVariable, stack []map[string]variableValue) (any, ArErr) {
+	for i := len(stack) - 1; i >= 0; i-- {
+		if val, ok := stack[i][v.name]; ok {
+			return val.VAL, ArErr{}
+		}
+	}
+	return nil, ArErr{"Runtime Error", "variable \"" + v.name + "\" does not exist", v.line, v.path, v.code, true}
+}