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authorRyo Nihei <nihei.dev@gmail.com>2021-07-22 20:30:23 +0900
committerRyo Nihei <nihei.dev@gmail.com>2021-07-22 20:30:23 +0900
commit0baa69676ca83dbb4fe7241478a6ecf6c85418a9 (patch)
treef337b96c1d2c4742647b9e4570d34788014333d3
parentWrite a description file (diff)
downloadurubu-0baa69676ca83dbb4fe7241478a6ecf6c85418a9.tar.gz
urubu-0baa69676ca83dbb4fe7241478a6ecf6c85418a9.tar.xz
Add literal pattern syntax and change tree structure syntax
- Literal patterns don't interpret the special characters of regular expressions. In other words, 'abc|def' matches only `abc|def`, not `abc` or `def`. - Change tree structure syntax from '(...) to #(...).
-rw-r--r--driver/parser_test.go10
-rw-r--r--go.mod2
-rw-r--r--go.sum4
-rw-r--r--spec/clexspec.json2
-rw-r--r--spec/lexer.go18
-rw-r--r--spec/lexer_test.go15
-rw-r--r--spec/lexspec.json14
-rw-r--r--spec/parser_test.go12
-rw-r--r--spec/syntax_error.go1
9 files changed, 55 insertions, 23 deletions
diff --git a/driver/parser_test.go b/driver/parser_test.go
index 0bf8175..272a14d 100644
--- a/driver/parser_test.go
+++ b/driver/parser_test.go
@@ -210,10 +210,10 @@ fragment words: "[A-Za-z\u{0020}]+";
{
specSrc: `
list
- : "\[" elems "]" #ast '(list $2...)
+ : "\[" elems "]" #ast #(list $2...)
;
elems
- : elems "," id #ast '(elems $1... $3)
+ : elems "," id #ast #(elems $1... $3)
| id
;
whitespace: "\u{0020}+" #skip;
@@ -245,7 +245,7 @@ id: "[A-Za-z]+";
{
specSrc: `
s
- : foo #ast '(start $1)
+ : foo #ast #(start $1)
;
foo
: bar
@@ -258,7 +258,7 @@ bar: "bar";
{
specSrc: `
s
- : "foo" #ast '(s $1...)
+ : "foo" #ast #(s $1...)
;
`,
specErr: true,
@@ -267,7 +267,7 @@ s
{
specSrc: `
s
- : foo #ast '(s $1...)
+ : foo #ast #(s $1...)
;
foo: "foo";
`,
diff --git a/go.mod b/go.mod
index 3e16f7d..ef68d09 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,6 @@ module github.com/nihei9/vartan
go 1.16
require (
- github.com/nihei9/maleeni v0.1.0
+ github.com/nihei9/maleeni v0.2.0
github.com/spf13/cobra v1.1.3
)
diff --git a/go.sum b/go.sum
index 050de01..b5d707a 100644
--- a/go.sum
+++ b/go.sum
@@ -118,8 +118,8 @@ github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
-github.com/nihei9/maleeni v0.1.0 h1:J6biG1w/bApOZRZUB4r/TAGy6ir1ZT7Su/XO1Hp3adk=
-github.com/nihei9/maleeni v0.1.0/go.mod h1:BWTzKvhWqb4xDo5koZCQJ2eLdkgKL2WY7KlXa7J0tSg=
+github.com/nihei9/maleeni v0.2.0 h1:37G+fK9oJzCh6acgD1I0YI4aDQyvkm9fqDfEEpotRDQ=
+github.com/nihei9/maleeni v0.2.0/go.mod h1:BWTzKvhWqb4xDo5koZCQJ2eLdkgKL2WY7KlXa7J0tSg=
github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
diff --git a/spec/clexspec.json b/spec/clexspec.json
index e0495ea..1109df8 100644
--- a/spec/clexspec.json
+++ b/spec/clexspec.json
@@ -1 +1 @@
-{"initial_mode":1,"modes":["","default","terminal"],"compression_level":2,"specs":[null,{"kinds":["","white_space","newline","line_comment","kw_fragment","identifier","terminal_open","colon","or","semicolon","directive_marker","tree_node_open","tree_node_close","position","expansion"],"push":[0,0,0,0,0,0,2,0,0,0,0,0,0,0,0],"pop":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"dfa":{"initial_state":1,"accepting_states":[0,0,0,0,1,5,5,5,5,5,5,5,2,0,0,13,4,5,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,9,14,7,2,11,13,8,10,12],"row_count":48,"col_count":256,"transition":{"unique_entries":{"original_row_count":30,"original_col_count":256,"empty_value":0,"entries":[19,19,19,19,19,19,19,19,19,19,0,19,19,0,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,21,23,23,23,23,23,23,23,23,23,23,23,23,25,27,27,29,32,32,32,35,4,42,0,0,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,38,46,14,0,0,13,0,47,0,0,0,0,2,18,0,0,0,0,0,0,0,0,0,0,41,39,0,0,0,0,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,17,0,17,17,17,17,17,5,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,45,0,0,0,0,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,24,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,37,17,17,17,17,17,17,17,17,17,17,0,0,0,0,0,0,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,17,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,6,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,0,0,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,17,0,7,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,0,0,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,17,0,17,17,17,17,17,17,8,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,0,0,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,17,0,17,17,17,17,17,17,17,17,17,17,17,17,9,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,0,0,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,17,0,17,17,17,17,10,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,0,0,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,17,0,17,17,17,17,17,17,17,17,17,17,17,17,17,11,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,0,0,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,17,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,16,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,0,0,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,17,0,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,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diff --git a/spec/lexer.go b/spec/lexer.go
index 1f8805a..1f50a27 100644
--- a/spec/lexer.go
+++ b/spec/lexer.go
@@ -210,9 +210,25 @@ func (l *lexer) lexAndSkipWSs() (*token, error) {
Row: l.row,
}
case "terminal_close":
- return newTerminalPatternToken(b.String(), newPosition(l.row)), nil
+ pat := b.String()
+ if pat == "" {
+ return nil, &verr.SpecError{
+ Cause: synErrEmptyPattern,
+ Row: l.row,
+ }
+ }
+ return newTerminalPatternToken(pat, newPosition(l.row)), nil
+ }
+ }
+ case "literal_pattern":
+ pat := strings.Trim(tok.Text(), "'")
+ if pat == "" {
+ return nil, &verr.SpecError{
+ Cause: synErrEmptyPattern,
+ Row: l.row,
}
}
+ return newTerminalPatternToken(mlspec.EscapePattern(pat), newPosition(l.row)), nil
case "colon":
return newSymbolToken(tokenKindColon, newPosition(l.row)), nil
case "or":
diff --git a/spec/lexer_test.go b/spec/lexer_test.go
index 89553d0..569f278 100644
--- a/spec/lexer_test.go
+++ b/spec/lexer_test.go
@@ -32,18 +32,19 @@ func TestLexer_Run(t *testing.T) {
}{
{
caption: "the lexer can recognize all kinds of tokens",
- src: `id"terminal":|;#'()$1...`,
+ src: `id"terminal"'.*+?|()[\':|;#()$1...#`,
tokens: []*token{
idTok("id"),
termPatTok("terminal"),
+ termPatTok(`\.\*\+\?\|\(\)\[\\`),
symTok(tokenKindColon),
symTok(tokenKindOr),
symTok(tokenKindSemicolon),
- symTok(tokenKindDirectiveMarker),
symTok(tokenKindTreeNodeOpen),
symTok(tokenKindTreeNodeClose),
posTok(1),
symTok(tokenKindExpantion),
+ symTok(tokenKindDirectiveMarker),
newEOFToken(),
},
},
@@ -64,6 +65,16 @@ func TestLexer_Run(t *testing.T) {
},
},
{
+ caption: "a pattern must include at least one character",
+ src: `""`,
+ err: synErrEmptyPattern,
+ },
+ {
+ caption: "a literal pattern must include at least one character",
+ src: `''`,
+ err: synErrEmptyPattern,
+ },
+ {
caption: "the lexer can recognize newlines and combine consecutive newlines into one",
src: "\u000A | \u000D | \u000D\u000A | \u000A\u000A \u000D\u000D \u000D\u000A\u000D\u000A",
tokens: []*token{
diff --git a/spec/lexspec.json b/spec/lexspec.json
index 6d1dd93..d95d31a 100644
--- a/spec/lexspec.json
+++ b/spec/lexspec.json
@@ -67,6 +67,10 @@
"pop": true
},
{
+ "kind": "literal_pattern",
+ "pattern": "'[^']*'"
+ },
+ {
"kind": "colon",
"pattern": ":"
},
@@ -79,12 +83,8 @@
"pattern": ";"
},
{
- "kind": "directive_marker",
- "pattern": "#"
- },
- {
"kind": "tree_node_open",
- "pattern": "'\\("
+ "pattern": "#\\("
},
{
"kind": "tree_node_close",
@@ -97,6 +97,10 @@
{
"kind": "expansion",
"pattern": "\\.\\.\\."
+ },
+ {
+ "kind": "directive_marker",
+ "pattern": "#"
}
]
}
diff --git a/spec/parser_test.go b/spec/parser_test.go
index d7ca30f..1c99716 100644
--- a/spec/parser_test.go
+++ b/spec/parser_test.go
@@ -319,11 +319,11 @@ s: foo; foo: "foo";
caption: "a grammar can contain 'ast' directives",
src: `
s
- : foo bar_list #ast '(s $1 $2)
+ : foo bar_list #ast #(s $1 $2)
;
bar_list
- : bar_list bar #ast '(bar_list $1... $2)
- | bar #ast '(bar_list $1)
+ : bar_list bar #ast #(bar_list $1... $2)
+ | bar #ast #(bar_list $1)
;
foo: "foo";
bar: "bar";
@@ -361,7 +361,7 @@ bar: "bar";
caption: "the first element of a tree structure must be an ID",
src: `
s
- : foo #ast '($1)
+ : foo #ast #($1)
;
foo: "foo";
`,
@@ -371,7 +371,7 @@ foo: "foo";
caption: "a tree structure must be closed by ')'",
src: `
s
- : foo #ast '(s $1
+ : foo #ast #(s $1
;
foo: "foo";
`,
@@ -382,7 +382,7 @@ foo: "foo";
src: `
#mode default
exp
- : exp "\+" id #ast '(exp $1 $2)
+ : exp "\+" id #ast #(exp $1 $2)
| id
;
whitespace: "\u{0020}+" #skip;
diff --git a/spec/syntax_error.go b/spec/syntax_error.go
index 9d67ccc..b427bed 100644
--- a/spec/syntax_error.go
+++ b/spec/syntax_error.go
@@ -20,6 +20,7 @@ var (
synErrUnclosedTerminal = newSyntaxError("unclosed terminal")
synErrInvalidEscSeq = newSyntaxError("invalid escape sequence")
synErrIncompletedEscSeq = newSyntaxError("incompleted escape sequence; unexpected EOF following a backslash")
+ synErrEmptyPattern = newSyntaxError("a pattern must include at least one character")
synErrZeroPos = newSyntaxError("a position must be greater than or equal to 1")
// syntax errors