parse durations

lib/node.go

@@ -8,6 +8,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"time"
 )
 
 type nodeType int
@@ -23,6 +24,7 @@ const (
 	n_object
 	n_variable
 	n_bool
+	n_duration
 )
 
 var indent = "  "
@@ -508,3 +510,32 @@ func (b *boolNode) pretty(w io.Writer, prefix string) error {
 func (b *boolNode) eval(ctx *context) (interface{}, error) {
 	return bool(*b), nil
 }
+
+type durationNode time.Duration
+
+func (d *durationNode) Type() nodeType {
+	return n_duration
+}
+
+func (d *durationNode) parse(p *parser) error {
+	t := p.next()
+	if t.t != t_duration {
+		return fmt.Errorf("unexpected %s token while parsing duration", t.t)
+	}
+	v, err := time.ParseDuration(t.s)
+	if err != nil {
+		return fmt.Errorf("unable to parse duration: %s", err)
+	}
+	*d = durationNode(v)
+	return nil
+}
+
+func (d *durationNode) pretty(w io.Writer, prefix string) error {
+	fmt.Fprintf(w, "%sdur:\n", prefix)
+	fmt.Fprintf(w, "%s%s\n", prefix+indent, time.Duration(*d).String())
+	return nil
+}
+
+func (d *durationNode) eval(ctx *context) (interface{}, error) {
+	return *d, nil
+}

lib/parse.go

@@ -17,6 +17,7 @@ var nodes = map[tokenType]func(p *parser) node{
 	t_object_start: func(p *parser) node { p.next(); return &objectNode{} },
 	t_variable:     func(p *parser) node { return new(variableNode) },
 	t_bool:         func(p *parser) node { return new(boolNode) },
+	t_duration:     func(p *parser) node { return new(durationNode) },
 }
 
 var DefaultPath = "./config.moon"

lib/tests/parse/08.in

@@ -0,0 +1,11 @@
+dur_1: 30s
+dur_2: 300ms
+dur_3: -1.5h
+dur_4: 2h45m
+dur_5: 9ns
+dur_6: 18us
+dur_7: 45µs
+dur_8: 900ms
+dur_9: 275s
+dur_10: 89m
+dur_11: 927h

lib/tests/parse/08.out

@@ -0,0 +1,67 @@
+root:
+  assign:
+    name:
+      dur_1
+    value:
+      dur:
+        30s
+  assign:
+    name:
+      dur_2
+    value:
+      dur:
+        300ms
+  assign:
+    name:
+      dur_3
+    value:
+      dur:
+        -1h30m0s
+  assign:
+    name:
+      dur_4
+    value:
+      dur:
+        2h45m0s
+  assign:
+    name:
+      dur_5
+    value:
+      dur:
+        9ns
+  assign:
+    name:
+      dur_6
+    value:
+      dur:
+        18us
+  assign:
+    name:
+      dur_7
+    value:
+      dur:
+        45us
+  assign:
+    name:
+      dur_8
+    value:
+      dur:
+        900ms
+  assign:
+    name:
+      dur_9
+    value:
+      dur:
+        4m35s
+  assign:
+    name:
+      dur_10
+    value:
+      dur:
+        1h29m0s
+  assign:
+    name:
+      dur_11
+    value:
+      dur:
+        927h0m0s