From ea81a8087bcd7953b083a2be9db447f75e7ebf56 Mon Sep 17 00:00:00 2001
From: Joel Martin <github@martintribe.org>
Date: Wed, 2 Apr 2014 22:23:37 -0500
Subject: All: split types into types, env, printer, core.

- types: low-level mapping to the implementation language.
- core: functions on types that are exposed directly to mal.
- printer: implementation called by pr-str, str, prn, println.
- env: the environment implementation

- Also, unindent all TCO while loops so that the diff of step4 and
  step5 are minimized.
---
 make/printer.mk | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 make/printer.mk

(limited to 'make/printer.mk')

diff --git a/make/printer.mk b/make/printer.mk
new file mode 100644
index 0000000..a1f2559
--- /dev/null
+++ b/make/printer.mk
@@ -0,0 +1,45 @@
+#
+# mal (Make a Lisp) printer
+#
+
+ifndef __mal_printer_included
+__mal_printer_included := true
+
+_TOP_DIR := $(dir $(lastword $(MAKEFILE_LIST)))
+include $(_TOP_DIR)util.mk
+include $(_TOP_DIR)types.mk
+
+# return a printable form of the argument, the second parameter is
+# 'print_readably' which backslashes quotes in string values
+_pr_str = $(if $(1),$(foreach ot,$(call _obj_type,$(1)),$(if $(call _EQ,make,$(ot)),$(call _error,_pr_str failed on $(1)),$(call $(ot)_pr_str,$(1),$(2)))),)
+
+# Like _pr_str but takes multiple values in first argument, the second
+# parameter is 'print_readably' which backslashes quotes in string
+# values, the third parameter is the delimeter to use between each
+# _pr_str'd value
+_pr_str_mult = $(call _pr_str,$(word 1,$(1)),$(2))$(if $(word 2,$(1)),$(3)$(call _pr_str_mult,$(wordlist 2,$(words $(1)),$(1)),$(2),$(3)),)
+
+
+# Type specific printing
+
+nil_pr_str = nil
+true_pr_str = true
+false_pr_str = false
+
+number_pr_str = $(call int_decode,$($(1)_value))
+
+symbol_pr_str = $($(1)_value)
+
+string_pr_str = $(if $(2),"$(subst $(DQUOTE),$(ESC_DQUOTE),$(subst $(SLASH),$(SLASH)$(SLASH),$(call str_decode,$($(1)_value))))",$(call str_decode,$($(1)_value)))
+
+function_pr_str = <$(if $(word 6,$(value $(1)_value)),$(wordlist 1,5,$(value $(1)_value))...,$(value $(1)_value))>
+
+list_pr_str = ($(foreach v,$(call __get_obj_values,$(1)),$(call _pr_str,$(v),$(2))))
+
+vector_pr_str = [$(foreach v,$(call __get_obj_values,$(1)),$(call _pr_str,$(v),$(2)))]
+
+hash_map_pr_str = {$(foreach v,$(call __get_obj_values,$(1)),"$(foreach hcode,$(word 3,$(subst _, ,$(1))),$(patsubst $(1)_%,%,$(v:%_value=%)))" $(call _pr_str,$($(v)),$(2)))}
+
+atom_pr_str = (atom $(call _pr_str,$($(1)_value),$(2)))
+
+endif
-- 
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