From 43fdbf94ad87ea91a173c72688cad70a0a5f1ab4 Mon Sep 17 00:00:00 2001
From: Ryo Nihei <nihei.dev@gmail.com>
Date: Fri, 30 Apr 2021 01:54:02 +0900
Subject: Add character property expression (Meet RL1.2 of UTS #18 partially)

\p{property name=property value} matches a character has the property.
When the property name is General_Category, it can be omitted.
That is, \p{Letter} equals \p{General_Category=Letter}.
Currently, only General_Category is supported.
This feature meets RL1.2 of UTS #18 partially.

RL1.2 Properties: https://unicode.org/reports/tr18/#RL1.2
---
 generator/main.go | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 generator/main.go

(limited to 'generator/main.go')

diff --git a/generator/main.go b/generator/main.go
new file mode 100644
index 0000000..3edcef5
--- /dev/null
+++ b/generator/main.go
@@ -0,0 +1,70 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+	"text/template"
+
+	"github.com/nihei9/maleeni/ucd"
+)
+
+func main() {
+	err := gen()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+		os.Exit(1)
+	}
+}
+
+func gen() error {
+	var propValAliases *ucd.PropertyValueAliases
+	{
+		resp, err := http.Get("https://www.unicode.org/Public/13.0.0/ucd/PropertyValueAliases.txt")
+		if err != nil {
+			return err
+		}
+		defer resp.Body.Close()
+		propValAliases, err = ucd.ParsePropertyValueAliases(resp.Body)
+		if err != nil {
+			return err
+		}
+	}
+	var unicodeData *ucd.UnicodeData
+	{
+		resp, err := http.Get("https://www.unicode.org/Public/13.0.0/ucd/UnicodeData.txt")
+		if err != nil {
+			return err
+		}
+		defer resp.Body.Close()
+		unicodeData, err = ucd.ParseUnicodeData(resp.Body, propValAliases)
+		if err != nil {
+			return err
+		}
+	}
+	tmpl, err := template.ParseFiles("../compiler/ucd_table.go.tmpl")
+	if err != nil {
+		return err
+	}
+	var b strings.Builder
+	err = tmpl.Execute(&b, struct {
+		GeneratorName        string
+		UnicodeData          *ucd.UnicodeData
+		PropertyValueAliases *ucd.PropertyValueAliases
+	}{
+		GeneratorName:        "generator/main.go",
+		UnicodeData:          unicodeData,
+		PropertyValueAliases: propValAliases,
+	})
+	if err != nil {
+		return err
+	}
+	f, err := os.OpenFile("../compiler/ucd_table.go", os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	fmt.Fprintf(f, b.String())
+	return nil
+}
-- 
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