From: Matt S Trout <mst@shadowcat.co.uk>
Date: Tue, 19 Jun 2012 17:49:47 +0000 (+0000)
Subject: basic parsing
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=015669f7ce033c77e6471afa90c98b549ac61c1d;p=scpubgit%2FTenDotTcl.git

basic parsing
---

diff --git a/json.tcl b/json.tcl
index 4b8c13a..bb7a155 100644
--- a/json.tcl
+++ b/json.tcl
@@ -60,8 +60,8 @@ namespace eval ten::json {
 
     proc deparse {data} {
       switch -regexp [lindex $data 0] {
-        ^true|false|null$  { lindex $data 0 }
-        ^num|str|obj|list$ { eval $data }
+        ^(true|false|null)$  { lindex $data 0 }
+        ^(num|str|obj|list)$ { eval $data }
         default { error [ concat "Invalid JSON type " [lindex $data 0 0] ] }
       }
     }
@@ -90,8 +90,8 @@ namespace eval ten::json {
 
     proc tclify {data} {
       switch -regexp [lindex $data 0] {
-        ^true|false|null$ { uplevel 1 return [lindex $data 0] }
-        ^num|str|obj|list$ {}
+        ^(true|false|null)$ { uplevel 1 return [lindex $data 0] }
+        ^(num|str|obj|list)$ {}
         default { error [ concat "Invalid JSON type " [lindex $data 0 0] ] }
       }
       eval $data
@@ -129,6 +129,7 @@ namespace eval ten::json {
       eat_any
       set tcl {list}
       while {"$json" ne ""} {
+        eat_spaces
         if {[string index $json 0] eq "]"} {
           eat_any
           return $tcl
@@ -141,14 +142,19 @@ namespace eval ten::json {
 
     proc parse_obj {} {
       variable json
-      eat_char
+      eat_any
       set tcl {obj}
       while {"$json" ne ""} {
-        if {[string index $json 0] eq "]"} {
-          eat_char
+        eat_spaces
+        if {[string index $json 0] eq "\}"} {
+          eat_any
           return $tcl
         }
-        lappend tcl [ 
+        eat_spaces
+        lappend tcl [ parse_str ]
+        eat_spaces
+        eat_char :
+        eat_spaces
         lappend tcl [ parse ]
         eat_char ,
       }
@@ -160,7 +166,7 @@ namespace eval ten::json {
       # like Text::Balanced except ugly (borrowed from tcvJSON's code)
       set reStr {(?:(?:\")(?:[^\\\"]*(?:\\.[^\\\"]*)*)(?:\"))}
       if {![regexp $reStr $json string]} {
-        error [ concat "Invalid string: " [string range $json 0 32]
+        error "Invalid string: $json"
       }
       set json [string range $json [string length $string] end]
       # chop off outer ""s and substitute backslashes
@@ -180,6 +186,16 @@ namespace eval ten::json {
       list num $num
     }
 
+    proc parse_bare {} {
+      variable json
+      if [regexp {^(true|false|null)} $json matched] {
+        set json [ string range $json [ string length $matched ] end ]
+        return $matched
+      } else {
+        error "Out of ideas parsing: $json"
+      }
+    }
+
     proc parse {} {
       variable json
       eat_spaces
@@ -193,7 +209,7 @@ namespace eval ten::json {
 
         {[-0-9]} { parse_num }
 
-        default { error "argh" }
+        default { parse_bare }
       }
     }
   }
@@ -228,6 +244,6 @@ dict for {k v} [ ten::json::tclify_json [
   lindex [ ten::json::tclify_json $ex_json ] 2
 ] ] { puts "$k: $v" }
 
-#puts [ ten::json::parse_json $jtext ]
+puts [ ten::json::parse_json $jtext ]
 
 puts [ ten::json::parse_json {["foo",2345,["bar"]]} ]