From 345afe0c39a3dcee33fd733a00432c055eeb2b55 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Wed, 21 Feb 2024 00:16:48 +0200
Subject: also generate String methods for Go structs

---
 internal/generated/nqc.raku | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

(limited to 'internal/generated/nqc.raku')

diff --git a/internal/generated/nqc.raku b/internal/generated/nqc.raku
index 040617f..f358e2a 100644
--- a/internal/generated/nqc.raku
+++ b/internal/generated/nqc.raku
@@ -34,7 +34,23 @@ class NQCToGoActions {
     method constant($/) { make 'const ' ~ $<identifier> ~ ' = ' ~ $<number> ~ "\n" }
 
     method struct($/) {
-        make 'type ' ~ $<identifier>.made ~ " struct \{\n\t" ~ $<member>.map(*.made).join("\n\t") ~ "\n\}"
+        make 'type ' ~ $<identifier>.made ~ " struct \{\n\t" 
+            ~ $<member>.map(*.made).join("\n\t") 
+            ~ "\n\}\n\n"
+            ~ self!struct-go-string-method($/);
+    }
+
+    # Generate String() method on the Go struct, for pretty printing.
+    method !struct-go-string-method($/) returns Str {
+        my Str $self-ref = $<identifier>.lc.substr(0,1);
+        my Str @format = $<member>.map({ $_.<identifier>.made ~ ':%v' });
+        my Str @args = $<member>.map({ "$self-ref." ~ $_.<identifier>.made });
+
+        return qq:to/END/;
+               func ({$self-ref} {$<identifier>}) String() string \{
+               \treturn fmt.Sprintf("{@format.join(' ')}", {@args.join(', ')})
+               \}
+               END
     }
 
     method member($/) { make $<identifier>.made ~ ' ' ~ ($<arraysize> // '') ~ $<type>.made }
-- 
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