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Lecture 6 complete.

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This commit is contained in:
Edward R. Gonzalez
2022-07-20 14:57:26 -04:00
parent f85c9615e4
commit de420a8111
8 changed files with 243 additions and 73 deletions
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56
App/RegM/Scripts/SRegex.gd
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@ -664,7 +664,7 @@ func parse_GlyphDash():
var \
node = ASTNode.new()
node.Type = NodeType.glyph
node.Value = "-"
node.Value = "\\-"
return node
@ -894,22 +894,21 @@ func parse_String():
var ExprAST : ASTNode
var RegexResult : String
func transpile(expression : String):
func compile(expression : String):
init( expression )
NextToken = next_Token()
ExprAST = parse_OpUnion(null)
return transiple_Union(ExprAST)
return compile_Union(ExprAST)
func transiple_Union(node : ASTNode):
func compile_Union(node : ASTNode):
var result = ""
var expressionLeft = node.Value
if node.Type == NodeType.union :
expressionLeft = node.Value[0].Value
for entry in expressionLeft :
match entry.Type :
NodeType.str_start:
@ -918,15 +917,15 @@ func transiple_Union(node : ASTNode):
result += "$"
NodeType.capture:
result += transpile_CaptureGroup(entry, false)
result += compile_CaptureGroup(entry, false)
NodeType.look:
result += transpile_LookAhead(entry, false)
result += compile_LookAhead(entry, false)
NodeType.ref:
result += transpile_Backreference(entry)
result += compile_Backreference(entry)
NodeType.repeat:
result += transpile_Repeat(entry)
result += compile_Repeat(entry)
NodeType.set:
result += transpile_Set(entry, false)
result += compile_Set(entry, false)
NodeType.glyph:
result += entry.Value
@ -942,19 +941,18 @@ func transiple_Union(node : ASTNode):
result += entry.Value
NodeType.string:
result += transpile_String(entry, false)
result += compile_String(entry, false)
NodeType.op_not:
result += transpile_OpNot(entry)
result += compile_OpNot(entry)
if node.Type == NodeType.union && node.Value[1] != null :
result += "|"
result += transiple_Union(node.Value[1])
result += compile_Union(node.Value[1])
return result
func transpile_CaptureGroup(node : ASTNode, negate : bool):
func compile_CaptureGroup(node : ASTNode, negate : bool):
var result = ""
if negate :
@ -962,12 +960,12 @@ func transpile_CaptureGroup(node : ASTNode, negate : bool):
else :
result += "("
result += transiple_Union(node.Value)
result += compile_Union(node.Value)
result += ")"
return result
func transpile_LookAhead(node : ASTNode, negate : bool):
func compile_LookAhead(node : ASTNode, negate : bool):
var result = ""
if negate :
@ -975,19 +973,19 @@ func transpile_LookAhead(node : ASTNode, negate : bool):
else :
result += "(?="
result += transiple_Union(node.Value.Value)
result += compile_Union(node.Value.Value)
result += ")"
return result
func transpile_Backreference(node : ASTNode):
func compile_Backreference(node : ASTNode):
var \
result = "\\"
result += node.Value
return result
func transpile_Repeat(node : ASTNode):
func compile_Repeat(node : ASTNode):
var result = ""
var vrange = node.Value[0]
var lazy = node.Value[1]
@ -1013,7 +1011,7 @@ func transpile_Repeat(node : ASTNode):
return result
func transpile_Set(node : ASTNode, negate : bool):
func compile_Set(node : ASTNode, negate : bool):
var result = ""
if negate :
@ -1023,7 +1021,7 @@ func transpile_Set(node : ASTNode, negate : bool):
for entry in node.Value :
if entry.Type == NodeType.op_not :
result += transpile_OpNot(entry)
result += compile_OpNot(entry)
elif entry.Type == NodeType.between :
result += entry.Value[0].Value
result += "-"
@ -1035,7 +1033,7 @@ func transpile_Set(node : ASTNode, negate : bool):
return result
func transpile_String(node : ASTNode, negate : bool):
func compile_String(node : ASTNode, negate : bool):
var result = ""
if negate :
@ -1052,14 +1050,14 @@ func transpile_String(node : ASTNode, negate : bool):
return result
func transpile_OpNot(node : ASTNode):
func compile_OpNot(node : ASTNode):
var result = ""
var entry = node.Value
match entry.Type :
NodeType.capture:
result += transpile_CaptureGroup(entry, true)
result += compile_CaptureGroup(entry, true)
NodeType.digit:
result += "\\D"
NodeType.word:
@ -1067,10 +1065,10 @@ func transpile_OpNot(node : ASTNode):
NodeType.whitespace:
result += "\\S"
NodeType.look:
result += transpile_LookAhead(entry, true)
result += compile_LookAhead(entry, true)
NodeType.string:
result += transpile_String(entry, true)
result += compile_String(entry, true)
NodeType.set:
result += transpile_Set(entry, true)
result += compile_Set(entry, true)
return result